Scippy

SCIP

Solving Constraint Integer Programs

nlpioracle.c
Go to the documentation of this file.
1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
6 /* Copyright (C) 2002-2019 Konrad-Zuse-Zentrum */
7 /* fuer Informationstechnik Berlin */
8 /* */
9 /* SCIP is distributed under the terms of the ZIB Academic License. */
10 /* */
11 /* You should have received a copy of the ZIB Academic License */
12 /* along with SCIP; see the file COPYING. If not visit scip.zib.de. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15 
16 /**@file nlpioracle.c
17  * @brief implementation of NLPI oracle interface
18  * @author Stefan Vigerske
19  *
20  * @todo jacobi evaluation should be sparse
21  */
22 
23 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
24 
25 #include "scip/pub_message.h"
26 #include "scip/pub_misc.h"
27 #include "nlpi/nlpioracle.h"
28 #include "nlpi/pub_expr.h"
29 #include "nlpi/exprinterpret.h"
30 
31 #include <string.h> /* for strlen */
32 
33 /**@name NLPI Oracle data structures */
34 /**@{ */
35 
37 {
38  SCIP_Real lhs; /**< left hand side (for constraint) or constant (for objective) */
39  SCIP_Real rhs; /**< right hand side (for constraint) or constant (for objective) */
40 
41  int linsize; /**< length of linidxs and lincoefs arrays */
42  int nlinidxs; /**< number of linear variable indices and coefficients */
43  int* linidxs; /**< variable indices in linear part, or NULL if none */
44  SCIP_Real* lincoefs; /**< variable coefficients in linear part, of NULL if none */
45 
46  int quadsize; /**< length of quadelems array */
47  int nquadelems; /**< number of quadratic elements */
48  SCIP_QUADELEM* quadelems; /**< quadratic elements, or NULL if none */
49 
50  int* exprvaridxs; /**< indices of variables in expression tree, or NULL if no exprtree */
51  SCIP_EXPRTREE* exprtree; /**< expression tree for nonlinear part, or NULL if none */
52 
53  char* name; /**< name of constraint */
54 };
56 
58 {
59  BMS_BLKMEM* blkmem; /**< block memory */
60  SCIP_Real infinity; /**< value for infinity */
61  char* name; /**< name of problem */
62 
63  int varssize; /**< length of variables related arrays */
64  int nvars; /**< number of variables */
65  SCIP_Real* varlbs; /**< array with variable lower bounds */
66  SCIP_Real* varubs; /**< array with variable upper bounds */
67  char** varnames; /**< array with variable names */
68  int* vardegrees; /**< array with maximal degree of variable over objective and all constraints */
69  SCIP_Bool vardegreesuptodate; /**< whether the variable degrees are up to date */
70 
71  int consssize; /**< length of constraints related arrays */
72  int nconss; /**< number of constraints */
73  SCIP_NLPIORACLECONS** conss; /**< constraints, or NULL if none */
74 
75  SCIP_NLPIORACLECONS* objective; /**< objective */
76 
77  int* jacoffsets; /**< rowwise jacobi sparsity pattern: constraint offsets in jaccols */
78  int* jaccols; /**< rowwise jacobi sparsity pattern: indices of variables appearing in constraints */
79 
80  int* heslagoffsets; /**< rowwise sparsity pattern of hessian matrix of Lagrangian: row offsets in heslagcol */
81  int* heslagcols; /**< rowwise sparsity pattern of hessian matrix of Lagrangian: column indices; sorted for each row */
82 
83 
84  SCIP_EXPRINT* exprinterpreter; /**< interpreter for expression trees: evaluation and derivatives */
85 };
86 
87 /**@} */
88 
89 /**@name Local functions */
90 /**@{ */
91 
92 /** calculate memory size for dynamically allocated arrays (copied from scip/set.c) */
93 static
95  int num /**< minimum number of entries to store */
96  )
97 {
98  int size;
99 
100  /* calculate the size with this loop, such that the resulting numbers are always the same (-> block memory) */
101  size = 4;
102  while( size < num )
103  size = (int)(1.2 * size + 4);
104 
105  return size;
106 }
107 
108 /** ensures that variables related arrays in oracle have at least a given length */
109 static
111  SCIP_NLPIORACLE* oracle, /**< NLPIORACLE data structure */
112  int minsize /**< minimal required size */
113  )
114 {
115  assert(oracle != NULL);
116 
117  if( minsize > oracle->varssize )
118  {
119  int newsize;
120 
121  newsize = calcGrowSize(minsize);
122  assert(newsize >= minsize);
123 
124  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->varlbs, oracle->varssize, newsize) );
125  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->varubs, oracle->varssize, newsize) );
126  if( oracle->varnames != NULL )
127  {
128  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->varnames, oracle->varssize, newsize) );
129  }
130  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->vardegrees, oracle->varssize, newsize) );
131 
132  oracle->varssize = newsize;
133  }
134  assert(oracle->varssize >= minsize);
135 
136  return SCIP_OKAY;
137 }
138 
139 /** ensures that constraints array in oracle has at least a given length */
140 static
142  SCIP_NLPIORACLE* oracle, /**< NLPIORACLE data structure */
143  int minsize /**< minimal required size */
144  )
145 {
146  assert(oracle != NULL);
147 
148  if( minsize > oracle->consssize )
149  {
150  int newsize;
151 
152  newsize = calcGrowSize(minsize);
153  assert(newsize >= minsize);
154 
155  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->conss, oracle->consssize, newsize) );
156  oracle->consssize = newsize;
157  }
158  assert(oracle->consssize >= minsize);
159 
160  return SCIP_OKAY;
161 }
162 
163 /** ensures that arrays for linear part in a oracle constraints have at least a given length */
164 static
166  BMS_BLKMEM* blkmem, /**< block memory */
167  SCIP_NLPIORACLECONS* cons, /**< oracle constraint */
168  int minsize /**< minimal required size */
169  )
170 {
171  assert(blkmem != NULL);
172  assert(cons != NULL);
173 
174  if( minsize > cons->linsize )
175  {
176  int newsize;
177 
178  newsize = calcGrowSize(minsize);
179  assert(newsize >= minsize);
180 
181  SCIP_ALLOC( BMSreallocBlockMemoryArray(blkmem, &cons->linidxs, cons->linsize, newsize) );
182  SCIP_ALLOC( BMSreallocBlockMemoryArray(blkmem, &cons->lincoefs, cons->linsize, newsize) );
183  cons->linsize = newsize;
184  }
185  assert(cons->linsize >= minsize);
186 
187  return SCIP_OKAY;
188 }
189 
190 /** ensures that arrays for quadratic part in a oracle constraints have at least a given length */
191 static
193  BMS_BLKMEM* blkmem, /**< block memory */
194  SCIP_NLPIORACLECONS* cons, /**< oracle constraint */
195  int minsize /**< minimal required size */
196  )
197 {
198  assert(blkmem != NULL);
199  assert(cons != NULL);
200 
201  if( minsize > cons->quadsize )
202  {
203  int newsize;
204 
205  newsize = calcGrowSize(minsize);
206  assert(newsize >= minsize);
207 
208  SCIP_ALLOC( BMSreallocBlockMemoryArray(blkmem, &cons->quadelems, cons->quadsize, newsize) );
209  cons->quadsize = newsize;
210  }
211  assert(cons->quadsize >= minsize);
212 
213  return SCIP_OKAY;
214 }
215 
216 /** ensures that a given array of integers has at least a given length */
217 static
219  BMS_BLKMEM* blkmem, /**< block memory */
220  int** intarray, /**< array of integers */
221  int* len, /**< length of array (modified if reallocated) */
222  int minsize /**< minimal required array length */
223  )
224 {
225  assert(blkmem != NULL);
226  assert(intarray != NULL);
227  assert(len != NULL);
228 
229  if( minsize > *len )
230  {
231  int newsize;
232 
233  newsize = calcGrowSize(minsize);
234  assert(newsize >= minsize);
235 
236  SCIP_ALLOC( BMSreallocBlockMemoryArray(blkmem, intarray, *len, newsize) );
237  *len = newsize;
238  }
239  assert(*len >= minsize);
240 
241  return SCIP_OKAY;
242 }
243 
244 /** Invalidates the sparsity pattern of the Jacobian.
245  * Should be called when constraints are added or deleted.
246  */
247 static
249  SCIP_NLPIORACLE* oracle /**< pointer to store NLPIORACLE data structure */
250  )
251 {
252  assert(oracle != NULL);
253 
254  SCIPdebugMessage("%p invalidate jacobian sparsity\n", (void*)oracle);
255 
256  if( oracle->jacoffsets == NULL )
257  { /* nothing to do */
258  assert(oracle->jaccols == NULL);
259  return;
260  }
261 
262  assert(oracle->jaccols != NULL);
263  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->jaccols, oracle->jacoffsets[oracle->nconss]);
264  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->jacoffsets, oracle->nconss + 1);
265 }
266 
267 /** Invalidates the sparsity pattern of the Hessian of the Lagragian.
268  * Should be called when the objective is set or constraints are added or deleted.
269  */
270 static
272  SCIP_NLPIORACLE* oracle /**< pointer to store NLPIORACLE data structure */
273  )
274 {
275  assert(oracle != NULL);
276 
277  SCIPdebugMessage("%p invalidate hessian lag sparsity\n", (void*)oracle);
278 
279  if( oracle->heslagoffsets == NULL )
280  { /* nothing to do */
281  assert(oracle->heslagcols == NULL);
282  return;
283  }
284 
285  assert(oracle->heslagcols != NULL);
286  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->heslagcols, oracle->heslagoffsets[oracle->nvars]);
287  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->heslagoffsets, oracle->nvars + 1);
288 }
289 
290 /** sorts a linear term, merges duplicate entries and removes entries with coefficient 0.0 */
291 static
293  int* nidxs, /**< number of variables */
294  int* idxs, /**< indices of variables */
295  SCIP_Real* coefs /**< coefficients of variables */
296  )
297 {
298  int offset;
299  int j;
300 
301  assert(nidxs != NULL);
302  assert(idxs != NULL || *nidxs == 0);
303  assert(coefs != NULL || *nidxs == 0);
304 
305  if( *nidxs == 0 )
306  return;
307 
308  SCIPsortIntReal(idxs, coefs, *nidxs);
309 
310  offset = 0;
311  j = 0;
312  while( j+offset < *nidxs )
313  {
314  assert(idxs[j] >= 0); /*lint !e613*/
315 
316  /* move j+offset to j, if different */
317  if( offset > 0 )
318  {
319  idxs[j] = idxs[j+offset]; /*lint !e613*/
320  coefs[j] = coefs[j+offset]; /*lint !e613*/
321  }
322 
323  /* add up coefs for j+offset+1... as long as they have the same index */
324  while( j+offset+1 < *nidxs && idxs[j] == idxs[j+offset+1] ) /*lint !e613*/
325  {
326  coefs[j] += coefs[j+offset+1]; /*lint !e613*/
327  ++offset;
328  }
329 
330  /* if j'th element is 0, increase offset, otherwise increase j */
331  if( coefs[j] == 0.0 ) /*lint !e613*/
332  ++offset;
333  else
334  ++j;
335  }
336  *nidxs -= offset;
337 }
338 
339 /** creates a NLPI constraint from given constraint data */
340 static
342  BMS_BLKMEM* blkmem, /**< block memory */
343  SCIP_NLPIORACLECONS** cons, /**< buffer where to store pointer to constraint */
344  int nlinidxs, /**< length of linear part */
345  const int* linidxs, /**< indices of linear part, or NULL if nlinidxs == 0 */
346  const SCIP_Real* lincoefs, /**< coefficients of linear part, or NULL if nlinidxs == 0 */
347  int nquadelems, /**< lenght of quadratic part */
348  const SCIP_QUADELEM* quadelems, /**< quadratic elements, or NULL if nquadelems == 0 */
349  const int* exprvaridxs, /**< indicies of variables in expression tree, or NULL if exprtree == NULL */
350  const SCIP_EXPRTREE* exprtree, /**< expression tree, or NULL */
351  SCIP_Real lhs, /**< left-hand-side of constraint */
352  SCIP_Real rhs, /**< right-hand-side of constraint */
353  const char* name /**< name of constraint, or NULL */
354  )
355 {
356  assert(blkmem != NULL);
357  assert(cons != NULL);
358  assert(nlinidxs >= 0);
359  assert(linidxs != NULL || nlinidxs == 0);
360  assert(lincoefs != NULL || nlinidxs == 0);
361  assert(nquadelems >= 0);
362  assert(quadelems != NULL || nquadelems == 0);
363  assert(exprvaridxs != NULL || exprtree == NULL);
364  assert(EPSLE(lhs, rhs, SCIP_DEFAULT_EPSILON));
365 
366  SCIP_ALLOC( BMSallocBlockMemory(blkmem, cons) );
367  assert(*cons != NULL);
368  BMSclearMemory(*cons);
369 
370  if( nlinidxs > 0 )
371  {
372  SCIP_ALLOC( BMSduplicateBlockMemoryArray(blkmem, &(*cons)->linidxs, linidxs, nlinidxs) );
373  SCIP_ALLOC( BMSduplicateBlockMemoryArray(blkmem, &(*cons)->lincoefs, lincoefs, nlinidxs) );
374  (*cons)->linsize = nlinidxs;
375  (*cons)->nlinidxs = nlinidxs;
376 
377  /* sort, merge duplicates, remove zero's */
378  sortLinearCoefficients(&(*cons)->nlinidxs, (*cons)->linidxs, (*cons)->lincoefs);
379  assert((*cons)->linidxs[0] >= 0);
380  }
381 
382  if( nquadelems > 0 )
383  {
384  SCIP_ALLOC( BMSduplicateBlockMemoryArray(blkmem, &(*cons)->quadelems, quadelems, nquadelems) );
385  (*cons)->nquadelems = nquadelems;
386  (*cons)->quadsize = nquadelems;
387 
388  /* sort and squeeze quadratic part */
389  SCIPquadelemSort((*cons)->quadelems, nquadelems);
390  SCIPquadelemSqueeze((*cons)->quadelems, nquadelems, &(*cons)->nquadelems);
391  assert((*cons)->nquadelems == 0 || (*cons)->quadelems[0].idx1 >= 0);
392  assert((*cons)->nquadelems == 0 || (*cons)->quadelems[0].idx2 >= 0);
393  }
394 
395  if( exprtree != NULL )
396  {
397  SCIP_CALL( SCIPexprtreeCopy(blkmem, &(*cons)->exprtree, (SCIP_EXPRTREE*)exprtree) );
398 
399  SCIP_ALLOC( BMSduplicateBlockMemoryArray(blkmem, &(*cons)->exprvaridxs, exprvaridxs, SCIPexprtreeGetNVars((SCIP_EXPRTREE*)exprtree)) );
400  }
401 
402  if( lhs > rhs )
403  {
404  assert(EPSEQ(lhs, rhs, SCIP_DEFAULT_EPSILON));
405  lhs = rhs;
406  }
407  (*cons)->lhs = lhs;
408  (*cons)->rhs = rhs;
409 
410  if( name != NULL )
411  {
412  SCIP_ALLOC( BMSduplicateBlockMemoryArray(blkmem, &(*cons)->name, name, strlen(name)+1) );
413  }
414 
415  return SCIP_OKAY;
416 }
417 
418 /** frees a constraint */
419 static
421  BMS_BLKMEM* blkmem, /**< block memory */
422  SCIP_NLPIORACLECONS** cons /**< pointer to constraint that should be freed */
423  )
424 {
425  assert(blkmem != NULL);
426  assert(cons != NULL);
427  assert(*cons != NULL);
428 
429  SCIPdebugMessage("free constraint %p\n", (void*)*cons);
430 
431  BMSfreeBlockMemoryArrayNull(blkmem, &(*cons)->linidxs, (*cons)->linsize);
432  BMSfreeBlockMemoryArrayNull(blkmem, &(*cons)->lincoefs, (*cons)->linsize);
433 
434  BMSfreeBlockMemoryArrayNull(blkmem, &(*cons)->quadelems, (*cons)->quadsize);
435 
436  if( (*cons)->exprtree != NULL )
437  {
438  BMSfreeBlockMemoryArrayNull(blkmem, &(*cons)->exprvaridxs, SCIPexprtreeGetNVars((*cons)->exprtree));
439  SCIP_CALL_ABORT( SCIPexprtreeFree(&(*cons)->exprtree) );
440  }
441 
442  if( (*cons)->name != NULL )
443  {
444  BMSfreeBlockMemoryArrayNull(blkmem, &(*cons)->name, strlen((*cons)->name)+1);
445  }
446 
447  BMSfreeBlockMemory(blkmem, cons);
448  assert(*cons == NULL);
449 }
450 
451 /** frees all constraints */
452 static
454  SCIP_NLPIORACLE* oracle /**< pointer to store NLPIORACLE data structure */
455  )
456 {
457  int i;
458 
459  assert(oracle != NULL);
460 
461  SCIPdebugMessage("%p free constraints\n", (void*)oracle);
462 
463  for( i = 0; i < oracle->nconss; ++i )
464  {
465  freeConstraint(oracle->blkmem, &oracle->conss[i]);
466  assert(oracle->conss[i] == NULL);
467  }
468  oracle->nconss = 0;
469 
470  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &oracle->conss, oracle->consssize);
471  oracle->consssize = 0;
472 }
473 
474 /** moves one variable
475  * The place where it moves to need to be empty (all NULL) but allocated.
476  * Note that this function does not update the variable indices in the constraints!
477  */
478 static
480  SCIP_NLPIORACLE* oracle, /**< pointer to store NLPIORACLE data structure */
481  int fromidx, /**< index of variable to move */
482  int toidx /**< index of place where to move variable to */
483  )
484 {
485  assert(oracle != NULL);
486 
487  SCIPdebugMessage("%p move variable\n", (void*)oracle);
488 
489  assert(0 <= fromidx);
490  assert(0 <= toidx);
491  assert(fromidx < oracle->nvars);
492  assert(toidx < oracle->nvars);
493 
494  assert(oracle->varlbs[toidx] <= -oracle->infinity);
495  assert(oracle->varubs[toidx] >= oracle->infinity);
496  assert(oracle->varnames == NULL || oracle->varnames[toidx] == NULL);
497  assert(!oracle->vardegreesuptodate || oracle->vardegrees[toidx] == -1);
498 
499  oracle->varlbs[toidx] = oracle->varlbs[fromidx];
500  oracle->varubs[toidx] = oracle->varubs[fromidx];
501 
502  oracle->varlbs[fromidx] = -oracle->infinity;
503  oracle->varubs[fromidx] = oracle->infinity;
504 
505  oracle->vardegrees[toidx] = oracle->vardegrees[fromidx];
506  oracle->vardegrees[fromidx] = -1;
507 
508  if( oracle->varnames != NULL )
509  {
510  oracle->varnames[toidx] = oracle->varnames[fromidx];
511  oracle->varnames[fromidx] = NULL;
512  }
513 
514  return SCIP_OKAY;
515 }
516 
517 /** frees all variables */
518 static
520  SCIP_NLPIORACLE* oracle /**< pointer to store NLPIORACLE data structure */
521  )
522 {
523  int i;
524 
525  assert(oracle != NULL);
526 
527  SCIPdebugMessage("%p free variables\n", (void*)oracle);
528 
529  if( oracle->varnames != NULL )
530  {
531  for( i = 0; i < oracle->nvars; ++i )
532  {
533  if( oracle->varnames[i] != NULL )
534  {
535  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->varnames[i], strlen(oracle->varnames[i])+1); /*lint !e866*/
536  }
537  }
538  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &oracle->varnames, oracle->varssize);
539  }
540  oracle->nvars = 0;
541  oracle->vardegreesuptodate = TRUE;
542 
543  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &oracle->varlbs, oracle->varssize);
544  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &oracle->varubs, oracle->varssize);
545  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &oracle->vardegrees, oracle->varssize);
546 
547  oracle->varssize = 0;
548 }
549 
550 /** increases variable degrees in oracle w.r.t. variables occuring in a single constraint */
551 static
553  SCIP_NLPIORACLE* oracle, /**< oracle data structure */
554  SCIP_NLPIORACLECONS* cons /**< oracle constraint */
555  )
556 {
557  int j;
558 
559  assert(oracle != NULL);
560  assert(oracle->nvars == 0 || oracle->vardegrees != NULL);
561  assert(cons != NULL);
562 
563  for( j = 0; j < cons->nlinidxs; ++j )
564  if( oracle->vardegrees[cons->linidxs[j]] < 1 )
565  oracle->vardegrees[cons->linidxs[j]] = 1;
566 
567  for( j = 0; j < cons->nquadelems; ++j )
568  {
569  if( oracle->vardegrees[cons->quadelems[j].idx1] < 2 )
570  oracle->vardegrees[cons->quadelems[j].idx1] = 2;
571 
572  if( oracle->vardegrees[cons->quadelems[j].idx2] < 2 )
573  oracle->vardegrees[cons->quadelems[j].idx2] = 2;
574  }
575 
576  /* we could use exprtreeGetDegree to get actual degree of a variable in tree,
577  * but so far no solver could make use of this information */
578  if( cons->exprtree != NULL )
579  for( j = SCIPexprtreeGetNVars(cons->exprtree)-1; j >= 0; --j )
580  oracle->vardegrees[cons->exprvaridxs[j]] = INT_MAX;
581 }
582 
583 /** Updates the degrees of all variables. */
584 static
586  SCIP_NLPIORACLE* oracle /**< pointer to store NLPIORACLE data structure */
587  )
588 {
589  int c;
590 
591  assert(oracle != NULL);
592  assert(oracle->nvars == 0 || oracle->vardegrees != NULL);
593  assert(oracle->objective != NULL);
594 
595  SCIPdebugMessage("%p update variable degrees\n", (void*)oracle);
596 
597  if( oracle->vardegreesuptodate || oracle->nvars == 0 )
598  return;
599 
600  /* assume all variables do not appear in NLP */
601  BMSclearMemoryArray(oracle->vardegrees, oracle->nvars);
602 
603  updateVariableDegreesCons(oracle, oracle->objective);
604  for( c = 0; c < oracle->nconss; ++c )
605  updateVariableDegreesCons(oracle, oracle->conss[c]);
606 
607  oracle->vardegreesuptodate = TRUE;
608 }
609 
610 /** applies a mapping of indices to one array of indices */
611 static
613  int* indexmap, /**< mapping from old variable indices to new indices */
614  int nindices, /**< number of indices in indices1 and indices2 */
615  int* indices /**< array of indices to adjust */
616  )
617 {
618  assert(indexmap != NULL);
619  assert(nindices == 0 || indices != NULL);
620 
621  for( ; nindices ; --nindices, ++indices )
622  {
623  assert(indexmap[*indices] >= 0);
624  *indices = indexmap[*indices];
625  }
626 }
627 
628 /** removes entries with index -1 (marked as deleted) from array of linear elements
629  * assumes that array is sorted by index, i.e., all -1 are at the beginning
630  */
631 static
633  BMS_BLKMEM* blkmem, /**< block memory */
634  int** linidxs, /**< variable indices */
635  SCIP_Real** coefs, /**< variable coefficients */
636  int* nidxs /**< number of indices */
637  )
638 {
639  int i;
640  int offset;
641 
642  SCIPdebugMessage("clear deleted linear elements\n");
643 
644  assert(blkmem != NULL);
645  assert(linidxs != NULL);
646  assert(*linidxs != NULL);
647  assert(coefs != NULL);
648  assert(*coefs != NULL);
649  assert(nidxs != NULL);
650  assert(*nidxs > 0);
651 
652  /* search for beginning of non-delete entries @todo binary search? */
653  for( offset = 0; offset < *nidxs; ++offset )
654  if( (*linidxs)[offset] >= 0 )
655  break;
656 
657  /* nothing was deleted */
658  if( offset == 0 )
659  return;
660 
661  /* some or all elements were deleted -> move remaining ones front */
662  for( i = 0; i < *nidxs - offset; ++i )
663  {
664  (*linidxs)[i] = (*linidxs)[i+offset];
665  (*coefs)[i] = (*coefs) [i+offset];
666  }
667  *nidxs -= offset;
668 }
669 
670 /** removes entries with index pair (-1,-1) (marked as deleted) from array of quadratic elements
671  * assumes that array is sorted, i.e., all deleted elements are at the beginning
672  */
673 static
675  BMS_BLKMEM* blkmem, /**< block memory */
676  SCIP_QUADELEM** quadelems, /**< quadratic elements */
677  int* nquadelems /**< number of quadratic elements */
678  )
679 {
680  int i;
681  int offset;
682 
683  SCIPdebugMessage("clear deleted quad elements\n");
684 
685  assert(blkmem != NULL);
686  assert(quadelems != NULL);
687  assert(*quadelems != NULL);
688  assert(nquadelems != NULL);
689  assert(*nquadelems > 0);
690 
691  /* search for beginning of non-delete entries @todo binary search? */
692  for( offset = 0; offset < *nquadelems; ++offset )
693  {
694  /* either both variables are marked as deleted or none of them */
695  assert(((*quadelems)[offset].idx1 >= 0) == ((*quadelems)[offset].idx2 >= 0));
696  if( (*quadelems)[offset].idx1 >= 0 )
697  break;
698  }
699 
700  /* nothing was deleted */
701  if( offset == 0 )
702  return;
703 
704  /* some or all elements were deleted -> move remaining ones front */
705  for( i = 0; i < *nquadelems - offset; ++i )
706  (*quadelems)[i] = (*quadelems)[i+offset];
707  *nquadelems -= offset;
708 }
709 
710 /** applies a mapping of indices to an array of quadratic elements */
711 static
713  int* indexmap, /**< mapping from old variable indices to new indices */
714  int nelems, /**< number of quadratic elements */
715  SCIP_QUADELEM* elems /**< array of quadratic elements to adjust */
716  )
717 {
718  assert(indexmap != NULL);
719  assert(nelems == 0 || elems != NULL);
720 
721  for( ; nelems ; --nelems, ++elems )
722  {
723  assert(indexmap[elems->idx1] >= 0);
724  assert(indexmap[elems->idx2] >= 0);
725  elems->idx1 = indexmap[elems->idx1];
726  elems->idx2 = indexmap[elems->idx2];
727  /* swap indices if not idx1 <= idx2 */
728  if( elems->idx1 > elems->idx2 )
729  {
730  int tmp = elems->idx2;
731  elems->idx2 = elems->idx1;
732  elems->idx1 = tmp;
733  }
734  }
735 }
736 
737 /** computes the value of a function */
738 static
740  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
741  SCIP_NLPIORACLECONS* cons, /**< oracle constraint */
742  const SCIP_Real* x, /**< the point where to evaluate */
743  SCIP_Real* val /**< pointer to store function value */
744  )
745 { /*lint --e{715}*/
746  assert(oracle != NULL);
747  assert(cons != NULL);
748  assert(x != NULL || oracle->nvars == 0);
749  assert(val != NULL);
750 
751  SCIPdebugMessage("%p eval function value\n", (void*)oracle);
752 
753  *val = 0.0;
754 
755  if( cons->nlinidxs > 0 )
756  {
757  int* linidxs;
759  int nlin;
760 
761  nlin = cons->nlinidxs;
762  linidxs = cons->linidxs;
763  lincoefs = cons->lincoefs;
764  assert(linidxs != NULL);
765  assert(lincoefs != NULL);
766  assert(x != NULL);
767 
768  for( ; nlin > 0; --nlin, ++linidxs, ++lincoefs )
769  *val += *lincoefs * x[*linidxs];
770  }
771 
772  if( cons->nquadelems > 0 )
773  {
775  int nquadelems;
776 
777  quadelems = cons->quadelems;
778  nquadelems = cons->nquadelems;
779  assert(quadelems != NULL);
780  assert(x != NULL);
781 
782  for( ; nquadelems > 0; --nquadelems, ++quadelems )
783  *val += quadelems->coef * x[quadelems->idx1] * x[quadelems->idx2];
784  }
785 
786  if( cons->exprtree != NULL )
787  {
788  SCIP_Real* xx;
789  int i;
790  SCIP_Real nlval;
791  int nvars;
792 
793  nvars = SCIPexprtreeGetNVars(cons->exprtree);
794 
795  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &xx, nvars) );
796  for( i = 0; i < nvars; ++i )
797  {
798  assert(cons->exprvaridxs[i] >= 0);
799  assert(cons->exprvaridxs[i] < oracle->nvars);
800  xx[i] = x[cons->exprvaridxs[i]]; /*lint !e613 !e644*/
801  }
802 
803  SCIP_CALL( SCIPexprintEval(oracle->exprinterpreter, cons->exprtree, xx, &nlval) );
804  if( nlval != nlval || ABS(nlval) >= oracle->infinity ) /*lint !e777*/
805  *val = nlval;
806  else
807  *val += nlval;
808 
809  BMSfreeBlockMemoryArray(oracle->blkmem, &xx, nvars);
810  }
811 
812  return SCIP_OKAY;
813 }
814 
815 /** computes the value and gradient of a function
816  *
817  * @return SCIP_INVALIDDATA, if the function or its gradient could not be evaluated (domain error, etc.)
818  */
819 static
821  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
822  SCIP_NLPIORACLECONS* cons, /**< oracle constraint */
823  const SCIP_Real* x, /**< the point where to evaluate */
824  SCIP_Bool isnewx, /**< has the point x changed since the last call to some evaluation function? */
825  SCIP_Real* RESTRICT val, /**< pointer to store function value */
826  SCIP_Real* RESTRICT grad /**< pointer to store function gradient */
827  )
828 { /*lint --e{715}*/
829  assert(oracle != NULL);
830  assert(x != NULL || oracle->nvars == 0);
831  assert(val != NULL);
832  assert(grad != NULL);
833 
834  SCIPdebugMessage("%p eval function gradient\n", (void*)oracle);
835 
836  *val = 0.0;
837  BMSclearMemoryArray(grad, oracle->nvars);
838 
839  if( cons->nlinidxs > 0 )
840  {
841  int* linidxs;
843  int nlin;
844 
845  nlin = cons->nlinidxs;
846  linidxs = cons->linidxs;
847  lincoefs = cons->lincoefs;
848  assert(linidxs != NULL);
849  assert(lincoefs != NULL);
850  assert(x != NULL);
851 
852  for( ; nlin > 0; --nlin, ++linidxs, ++lincoefs )
853  {
854  *val += *lincoefs * x[*linidxs];
855  assert(grad[*linidxs] == 0.0); /* we do not like duplicate indices */
856  grad[*linidxs] = *lincoefs;
857  }
858  }
859 
860  if( cons->nquadelems > 0 )
861  {
862  SCIP_Real tmp;
864  int nquadelems;
865 
866  quadelems = cons->quadelems;
867  nquadelems = cons->nquadelems;
868  assert(quadelems != NULL);
869  assert(x != NULL);
870 
871  for( ; nquadelems > 0; --nquadelems, ++quadelems )
872  {
873  tmp = quadelems->coef * x[quadelems->idx1];
874  *val += tmp * x[quadelems->idx2];
875  grad[quadelems->idx2] += tmp;
876  grad[quadelems->idx1] += quadelems->coef * x[quadelems->idx2];
877  }
878  }
879 
880  if( cons->exprtree != NULL )
881  {
882  SCIP_Real* xx;
883  SCIP_Real* g;
884  int i;
885  SCIP_Real nlval;
886  int nvars;
887 
888  xx = NULL;
889  nvars = SCIPexprtreeGetNVars(cons->exprtree);
890 
891  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &g, nvars) );
892 
893  if( isnewx )
894  {
895  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &xx, nvars) );
896  for( i = 0; i < nvars; ++i )
897  {
898  assert(cons->exprvaridxs[i] >= 0);
899  assert(cons->exprvaridxs[i] < oracle->nvars);
900  xx[i] = x[cons->exprvaridxs[i]]; /*lint !e613*/
901  }
902  }
903 
904  SCIPdebugMessage("eval gradient of ");
905  SCIPdebug( if( isnewx ) {printf("\nx ="); for( i = 0; i < nvars; ++i) printf(" %g", xx[i]); /*lint !e613*/ printf("\n");} )
906 
907  SCIP_CALL( SCIPexprintGrad(oracle->exprinterpreter, cons->exprtree, xx, isnewx, &nlval, g) ); /*lint !e644*/
908 
909  SCIPdebug( printf("g ="); for( i = 0; i < nvars; ++i) printf(" %g", g[i]); printf("\n"); )
910 
911  if( nlval != nlval || ABS(nlval) >= oracle->infinity ) /*lint !e777*/
912  {
913  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
914  BMSfreeBlockMemoryArray(oracle->blkmem, &g, nvars);
915  SCIPdebugMessage("gradient evaluation yield invalid function value %g\n", nlval);
916  return SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
917  }
918  else
919  {
920  *val += nlval;
921  for( i = 0; i < nvars; ++i )
922  if( !SCIPisFinite(g[i]) ) /*lint !e777*/
923  {
924  SCIPdebugMessage("gradient evaluation yield invalid gradient value %g\n", g[i]);
925  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
926  BMSfreeBlockMemoryArray(oracle->blkmem, &g, nvars);
927  return SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
928  }
929  else
930  {
931  grad[cons->exprvaridxs[i]] += g[i];
932  }
933  }
934 
935  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
936  BMSfreeBlockMemoryArray(oracle->blkmem, &g, nvars);
937  }
938 
939  return SCIP_OKAY;
940 }
941 
942 /** collects nonzeros entries in colnz and increases the nzcount given indices of quadratic terms */
943 static
945  SCIP_NLPIORACLE* oracle, /**< NLPI oracle */
946  int** colnz, /**< indices of nonzero entries for each column */
947  int* collen, /**< space allocated to store indices of nonzeros for each column */
948  int* colnnz, /**< number of nonzero entries for each column */
949  int* nzcount, /**< counter for total number of nonzeros; should be increased whenever some colnnz is increased */
950  int length, /**< length of quadratic part */
951  SCIP_QUADELEM* quadelems /**< quadratic elements */
952  )
953 {
954  int pos;
955 
956  SCIPdebugMessage("%p hess lag sparsity set nzflag for quad\n", (void*)oracle);
957 
958  assert(oracle != NULL);
959  assert(colnz != NULL);
960  assert(collen != NULL);
961  assert(colnnz != NULL);
962  assert(nzcount != NULL);
963  assert(quadelems != NULL);
964  assert(length >= 0);
965 
966  for( ; length > 0; --length, ++quadelems )
967  {
968  assert(quadelems->idx1 <= quadelems->idx2);
969 
970  if( colnz[quadelems->idx2] == NULL || !SCIPsortedvecFindInt(colnz[quadelems->idx2], quadelems->idx1, colnnz[quadelems->idx2], &pos) )
971  {
972  SCIP_CALL( ensureIntArraySize(oracle->blkmem, &colnz[quadelems->idx2], &collen[quadelems->idx2], colnnz[quadelems->idx2]+1) );
973  SCIPsortedvecInsertInt(colnz[quadelems->idx2], quadelems->idx1, &colnnz[quadelems->idx2], NULL);
974  ++(*nzcount);
975  }
976  }
977 
978  return SCIP_OKAY;
979 }
980 
981 /** collects indices of nonzero entries in the lower-left part of the hessian matrix of an expression
982  * adds the indices to a given set of indices, avoiding duplicates */
983 static
985  SCIP_NLPIORACLE* oracle, /**< NLPI oracle */
986  int** colnz, /**< indices of nonzero entries for each column */
987  int* collen, /**< space allocated to store indices of nonzeros for each column */
988  int* colnnz, /**< number of nonzero entries for each column */
989  int* nzcount, /**< counter for total number of nonzeros; should be increased when nzflag is set to 1 the first time */
990  int* exprvaridx, /**< indices of variables from expression tree in NLP */
991  SCIP_EXPRTREE* exprtree, /**< expression tree */
992  int dim /**< dimension of matrix */
993  )
994 {
995  SCIP_Real* x;
996  SCIP_Bool* hesnz;
997  int i;
998  int j;
999  int nvars;
1000  int nn;
1001  int row;
1002  int col;
1003  int pos;
1004 
1005  assert(oracle != NULL);
1006  assert(colnz != NULL);
1007  assert(collen != NULL);
1008  assert(colnnz != NULL);
1009  assert(nzcount != NULL);
1010  assert(exprvaridx != NULL);
1011  assert(exprtree != NULL);
1012  assert(dim >= 0);
1013 
1014  SCIPdebugMessage("%p hess lag sparsity set nzflag for exprtree\n", (void*)oracle);
1015 
1016  nvars = SCIPexprtreeGetNVars(exprtree);
1017  nn = nvars * nvars;
1018 
1019  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &x, nvars) );
1020  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &hesnz, nn) );
1021 
1022  for( i = 0; i < nvars; ++i )
1023  x[i] = 2.0; /* hope that this value does not make much trouble for the evaluation routines */ /*lint !e644*/
1024 
1025  SCIP_CALL( SCIPexprintHessianSparsityDense(oracle->exprinterpreter, exprtree, x, hesnz) ); /*lint !e644*/
1026 
1027  for( i = 0; i < nvars; ++i ) /* rows */
1028  for( j = 0; j <= i; ++j ) /* cols */
1029  {
1030  if( !hesnz[i*nvars + j] )
1031  continue;
1032 
1033  row = MAX(exprvaridx[i], exprvaridx[j]);
1034  col = MIN(exprvaridx[i], exprvaridx[j]);
1035 
1036  assert(row < dim);
1037  assert(col <= row);
1038 
1039  if( colnz[row] == NULL || !SCIPsortedvecFindInt(colnz[row], col, colnnz[row], &pos) )
1040  {
1041  SCIP_CALL( ensureIntArraySize(oracle->blkmem, &colnz[row], &collen[row], colnnz[row]+1) );
1042  SCIPsortedvecInsertInt(colnz[row], col, &colnnz[row], NULL);
1043  ++(*nzcount);
1044  }
1045  }
1046 
1047  BMSfreeBlockMemoryArray(oracle->blkmem, &x, nvars);
1048  BMSfreeBlockMemoryArray(oracle->blkmem, &hesnz, nn);
1049 
1050  return SCIP_OKAY;
1051 }
1052 
1053 /** adds quadratic part into hessian structure */
1054 static
1056  SCIP_Real weight, /**< weight of quadratic part */
1057  int length, /**< number of elements in matrix of quadratic part */
1058  SCIP_QUADELEM* quadelems, /**< elements in matrix of quadratic part */
1059  int* hesoffset, /**< row offsets in sparse matrix that is to be filled */
1060  int* hescol, /**< column indices in sparse matrix that is to be filled */
1061  SCIP_Real* values /**< buffer for values of sparse matrix that is to be filled */
1062  )
1063 {
1064  int idx;
1065 
1066  SCIPdebugMessage("hess lag add quad\n");
1067 
1068  assert(length >= 0);
1069  assert(quadelems != NULL || length == 0);
1070  assert(hesoffset != NULL);
1071  assert(hescol != NULL);
1072  assert(values != NULL);
1073 
1074  for( ; length > 0; --length, ++quadelems ) /*lint !e613*/
1075  {
1076  assert(quadelems->idx1 <= quadelems->idx2); /*lint !e613*/
1077  if( !SCIPsortedvecFindInt(&hescol[hesoffset[quadelems->idx2]], quadelems->idx1, hesoffset[quadelems->idx2 + 1] - hesoffset[quadelems->idx2], &idx) ) /*lint !e613*/
1078  {
1079  SCIPerrorMessage("Could not find entry in hessian sparsity\n");
1080  return SCIP_ERROR;
1081  }
1082  values[hesoffset[quadelems->idx2] + idx] += weight * ((quadelems->idx1 == quadelems->idx2) ? 2 * quadelems->coef : quadelems->coef); /*lint !e613*/
1083  }
1084 
1085  return SCIP_OKAY;
1086 }
1087 
1088 /** adds hessian of an expression into hessian structure */
1089 static
1091  SCIP_NLPIORACLE* oracle, /**< oracle */
1092  SCIP_Real weight, /**< weight of quadratic part */
1093  const SCIP_Real* x, /**< point for which hessian should be returned */
1094  SCIP_Bool new_x, /**< whether point has been evaluated before */
1095  int* exprvaridx, /**< NLP indices for variables in expression tree */
1096  SCIP_EXPRTREE* exprtree, /**< expression tree */
1097  int* hesoffset, /**< row offsets in sparse matrix that is to be filled */
1098  int* hescol, /**< column indices in sparse matrix that is to be filled */
1099  SCIP_Real* values /**< buffer for values of sparse matrix that is to be filled */
1100  )
1101 {
1102  SCIP_Real* xx;
1103  SCIP_Real* h;
1104  SCIP_Real* hh;
1105  int i;
1106  int j;
1107  int nvars;
1108  int nn;
1109  int row;
1110  int col;
1111  int idx;
1112  SCIP_Real val;
1113 
1114  SCIPdebugMessage("%p hess lag add exprtree\n", (void*)oracle);
1115 
1116  assert(oracle != NULL);
1117  assert(x != NULL || new_x == FALSE);
1118 
1119  nvars = exprtree != NULL ? SCIPexprtreeGetNVars(exprtree) : 0;
1120  if( nvars == 0 )
1121  return SCIP_OKAY;
1122 
1123  assert(exprtree != NULL);
1124  assert(exprvaridx != NULL);
1125  assert(hesoffset != NULL);
1126  assert(hescol != NULL);
1127  assert(values != NULL);
1128 
1129  nn = nvars * nvars;
1130 
1131  xx = NULL;
1132  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &h, nn) );
1133 
1134  if( new_x )
1135  {
1136  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &xx, nvars) );
1137  for( i = 0; i < nvars; ++i )
1138  {
1139  assert(exprvaridx[i] >= 0);
1140  xx[i] = x[exprvaridx[i]]; /*lint !e613*/
1141  }
1142  }
1143 
1144  SCIP_CALL( SCIPexprintHessianDense(oracle->exprinterpreter, exprtree, xx, new_x, &val, h) ); /*lint !e644*/
1145  if( val != val ) /*lint !e777*/
1146  {
1147  SCIPdebugMessage("hessian evaluation yield invalid function value %g\n", val);
1148  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
1149  BMSfreeBlockMemoryArray(oracle->blkmem, &h, nn);
1150  return SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
1151  }
1152 
1153  hh = h;
1154  for( i = 0; i < nvars; ++i ) /* rows */
1155  {
1156  for( j = 0; j <= i; ++j, ++hh ) /* cols */
1157  {
1158  if( !*hh )
1159  continue;
1160 
1161  if( !SCIPisFinite(*hh) ) /*lint !e777*/
1162  {
1163  SCIPdebugMessage("hessian evaluation yield invalid hessian value %g\n", *hh);
1164  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
1165  BMSfreeBlockMemoryArray(oracle->blkmem, &h, nn);
1166  return SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
1167  }
1168 
1169  row = MAX(exprvaridx[i], exprvaridx[j]);
1170  col = MIN(exprvaridx[i], exprvaridx[j]);
1171 
1172  if( !SCIPsortedvecFindInt(&hescol[hesoffset[row]], col, hesoffset[row+1] - hesoffset[row], &idx) )
1173  {
1174  SCIPerrorMessage("Could not find entry (%d, %d) in hessian sparsity\n", row, col);
1175  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
1176  BMSfreeBlockMemoryArray(oracle->blkmem, &h, nn);
1177  return SCIP_ERROR;
1178  }
1179 
1180  values[hesoffset[row] + idx] += weight * *hh;
1181  }
1182  hh += nvars - j;
1183  }
1184 
1185  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, nvars);
1186  BMSfreeBlockMemoryArray(oracle->blkmem, &h, nn);
1187 
1188  return SCIP_OKAY;
1189 }
1190 
1191 /** prints a name, if available, makes sure it has not more than 64 characters, and adds a unique prefix if the longnames flag is set */
1192 static
1194  char* buffer, /**< buffer to print to, has to be not NULL and should be at least 65 bytes */
1195  char* name, /**< name, or NULL */
1196  int idx, /**< index of var or cons which the name corresponds to */
1197  char prefix, /**< a letter (typically 'x' or 'e') to distinguish variable and equation names, if names[idx] is not available */
1198  const char* suffix, /**< a suffer to add to the name, or NULL */
1199  SCIP_Bool longnames /**< whether prefixes for long names should be added */
1200  )
1201 {
1202  assert(idx >= 0 && idx < 100000); /* to ensure that we do not exceed the size of the buffer */
1203 
1204  if( longnames )
1205  {
1206  if( name != NULL )
1207  (void) SCIPsnprintf(buffer, 64, "%c%05d%.*s%s", prefix, idx, suffix ? (int)(57-strlen(suffix)) : 57, name, suffix ? suffix : "");
1208  else
1209  (void) SCIPsnprintf(buffer, 64, "%c%05d", prefix, idx);
1210  }
1211  else
1212  {
1213  if( name != NULL )
1214  {
1215  assert(strlen(name) + (suffix ? strlen(suffix) : 0) <= 64);
1216  (void) SCIPsnprintf(buffer, 64, "%s%s", name, suffix ? suffix : "");
1217  }
1218  else
1219  {
1220  assert(1 + 5 + (suffix ? strlen(suffix) : 0) <= 64);
1221  (void) SCIPsnprintf(buffer, 64, "%c%d%s", prefix, idx, suffix ? suffix : "");
1222  }
1223  }
1224 }
1225 
1226 /** prints a function */
1227 static
1229  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1230  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
1231  FILE* file, /**< file to print to, has to be not NULL */
1232  SCIP_NLPIORACLECONS* cons, /**< constraint which function to print */
1233  SCIP_Bool longvarnames, /**< whether variable names need to be shorten to 64 characters */
1234  SCIP_Bool longequnames /**< whether equation names need to be shorten to 64 characters */
1235  )
1236 { /*lint --e{715}*/
1237  int i;
1238  char namebuf[70];
1239 
1240  SCIPdebugMessage("%p print function\n", (void*)oracle);
1241 
1242  assert(oracle != NULL);
1243  assert(file != NULL);
1244  assert(cons != NULL);
1245 
1246  for( i = 0; i < cons->nlinidxs; ++i )
1247  {
1248  printName(namebuf, oracle->varnames != NULL ? oracle->varnames[cons->linidxs[i]] : NULL, cons->linidxs[i], 'x', NULL, longvarnames);
1249  SCIPmessageFPrintInfo(messagehdlr, file, "%+.20g*%s", cons->lincoefs[i], namebuf);
1250  if( i % 10 == 9 )
1251  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
1252  }
1253 
1254  for( i = 0; i < cons->nquadelems; ++i )
1255  {
1256  printName(namebuf, oracle->varnames != NULL ? oracle->varnames[cons->quadelems[i].idx1] : NULL, cons->quadelems[i].idx1, 'x', NULL, longvarnames);
1257  SCIPmessageFPrintInfo(messagehdlr, file, "%+.20g*%s", cons->quadelems[i].coef, namebuf);
1258  printName(namebuf, oracle->varnames != NULL ? oracle->varnames[cons->quadelems[i].idx2] : NULL, cons->quadelems[i].idx2, 'x', NULL, longvarnames);
1259  SCIPmessageFPrintInfo(messagehdlr, file, "*%s", namebuf);
1260  if( i % 10 == 9 )
1261  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
1262  }
1263 
1264  if( cons->exprtree != NULL )
1265  {
1266  char** varnames;
1267  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &varnames, SCIPexprtreeGetNVars(cons->exprtree)) ); /*lint !e666*/
1268 
1269  /* setup variable names */
1270  for( i = 0; i < SCIPexprtreeGetNVars(cons->exprtree); ++i )
1271  {
1272  assert(cons->exprvaridxs[i] < 1e+20);
1273  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &varnames[i], 70) ); /*lint !e866 !e506 !e644*/
1274  printName(varnames[i], oracle->varnames != NULL ? oracle->varnames[cons->exprvaridxs[i]] : NULL, cons->exprvaridxs[i], 'x', NULL, longvarnames);
1275  }
1276 
1277  SCIPmessageFPrintInfo(messagehdlr, file, " +");
1278  SCIPexprtreePrint(cons->exprtree, messagehdlr, file, (const char**)varnames, NULL);
1279 
1280  for( i = 0; i < SCIPexprtreeGetNVars(cons->exprtree); ++i )
1281  {
1282  BMSfreeBlockMemoryArray(oracle->blkmem, &varnames[i], 70); /*lint !e866*/
1283  }
1284  BMSfreeBlockMemoryArray(oracle->blkmem, &varnames, SCIPexprtreeGetNVars(cons->exprtree));
1285  }
1286 
1287  return SCIP_OKAY;
1288 }
1289 
1290 /** returns whether an expression is contains nonsmooth operands (min, max, abs, ...) */
1291 static
1293  SCIP_EXPR* expr /**< expression */
1294  )
1295 {
1296  int i;
1297 
1298  assert(expr != NULL);
1299  assert(SCIPexprGetChildren(expr) != NULL || SCIPexprGetNChildren(expr) == 0);
1300 
1301  for( i = 0; i < SCIPexprGetNChildren(expr); ++i )
1302  {
1303  if( exprIsNonSmooth(SCIPexprGetChildren(expr)[i]) )
1304  return TRUE;
1305  }
1306 
1307  switch( SCIPexprGetOperator(expr) )
1308  {
1309  case SCIP_EXPR_MIN:
1310  case SCIP_EXPR_MAX:
1311  case SCIP_EXPR_ABS:
1312  case SCIP_EXPR_SIGN:
1313  case SCIP_EXPR_SIGNPOWER:
1314  return TRUE;
1315 
1316  default: ;
1317  } /*lint !e788*/
1318 
1319  return FALSE;
1320 }
1321 
1322 /**@} */
1323 
1324 /**@name public function */
1325 /**@{ */
1326 
1327 /** creates an NLPIORACLE data structure */
1329  BMS_BLKMEM* blkmem, /**< block memory */
1330  SCIP_NLPIORACLE** oracle /**< pointer to store NLPIORACLE data structure */
1331  )
1332 {
1333  assert(blkmem != NULL);
1334  assert(oracle != NULL);
1335 
1336  SCIPdebugMessage("%p oracle create\n", (void*)oracle);
1337 
1338  SCIP_ALLOC( BMSallocMemory(oracle) );
1339  BMSclearMemory(*oracle);
1340 
1341  (*oracle)->blkmem = blkmem;
1342  (*oracle)->infinity = SCIP_DEFAULT_INFINITY;
1343  (*oracle)->vardegreesuptodate = TRUE;
1344 
1345  SCIPdebugMessage("Oracle initializes expression interpreter %s\n", SCIPexprintGetName());
1346  SCIP_CALL( SCIPexprintCreate(blkmem, &(*oracle)->exprinterpreter) );
1347 
1348  /* create zero objective function */
1349  SCIP_CALL( createConstraint((*oracle)->blkmem, &(*oracle)->objective, 0, NULL, NULL, 0, NULL, NULL, NULL, 0.0, 0.0, NULL) );
1350 
1351  return SCIP_OKAY;
1352 }
1353 
1354 /** frees an NLPIORACLE data structure */
1356  SCIP_NLPIORACLE** oracle /**< pointer to NLPIORACLE data structure */
1357  )
1358 {
1359  assert(oracle != NULL);
1360  assert(*oracle != NULL);
1361 
1362  SCIPdebugMessage("%p oracle free\n", (void*)oracle);
1363 
1364  invalidateJacobiSparsity(*oracle);
1366 
1367  freeConstraint((*oracle)->blkmem, &(*oracle)->objective);
1368  freeConstraints(*oracle);
1369  freeVariables(*oracle);
1370 
1371  SCIP_CALL( SCIPexprintFree(&(*oracle)->exprinterpreter) );
1372 
1373  if( (*oracle)->name != NULL )
1374  {
1376  }
1377 
1378  BMSfreeMemory(oracle);
1379 
1380  return SCIP_OKAY;
1381 }
1382 
1383 /** sets the value for infinity */
1385  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1386  SCIP_Real infinity /**< value to use for infinity */
1387  )
1388 {
1389  assert(oracle != NULL);
1390  assert(infinity > 0.0);
1391 
1392  SCIPdebugMessage("%p set infinity\n", (void*)oracle);
1393 
1394  oracle->infinity = infinity;
1395 
1396  return SCIP_OKAY;
1397 }
1398 
1399 /** gets the value for infinity */
1401  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
1402  )
1403 {
1404  assert(oracle != NULL);
1405 
1406  SCIPdebugMessage("%p get infinity\n", (void*)oracle);
1407 
1408  return oracle->infinity;
1409 }
1410 
1411 /** sets the problem name (used for printing) */
1413  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1414  const char* name /**< name of problem */
1415  )
1416 {
1417  assert(oracle != NULL);
1418 
1419  SCIPdebugMessage("%p set problem name\n", (void*)oracle);
1420 
1421  if( oracle->name != NULL )
1422  {
1423  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->name, strlen(oracle->name)+1);
1424  }
1425 
1426  if( name != NULL )
1427  {
1428  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &oracle->name, name, strlen(name)+1) );
1429  }
1430 
1431  return SCIP_OKAY;
1432 }
1433 
1434 /** gets the problem name, or NULL if none set */
1436  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
1437  )
1438 {
1439  assert(oracle != NULL);
1440 
1441  SCIPdebugMessage("%p get problem name\n", (void*)oracle);
1442 
1443  return oracle->name;
1444 }
1445 
1446 /** adds variables */
1448  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1449  int nvars, /**< number of variables to add */
1450  const SCIP_Real* lbs, /**< array with lower bounds of new variables, or NULL if all -infinity */
1451  const SCIP_Real* ubs, /**< array with upper bounds of new variables, or NULL if all +infinity */
1452  const char** varnames /**< array with names of new variables, or NULL if no names should be stored */
1453  )
1454 {
1455  int i;
1456 
1457  assert(oracle != NULL);
1458 
1459  SCIPdebugMessage("%p add vars\n", (void*)oracle);
1460 
1461  if( nvars == 0 )
1462  return SCIP_OKAY;
1463 
1464  assert(nvars > 0);
1465 
1466  SCIP_CALL( ensureVarsSize(oracle, oracle->nvars + nvars) );
1467 
1468  if( lbs != NULL )
1469  {
1470  BMScopyMemoryArray(&oracle->varlbs[oracle->nvars], lbs, nvars); /*lint !e866*/
1471  }
1472  else
1473  for( i = 0; i < nvars; ++i )
1474  oracle->varlbs[oracle->nvars+i] = -oracle->infinity;
1475 
1476  if( ubs != NULL )
1477  {
1478  BMScopyMemoryArray(&oracle->varubs[oracle->nvars], ubs, nvars); /*lint !e866*/
1479 
1480  /* ensure variable bounds are consistent */
1481  for( i = oracle->nvars; i < oracle->nvars + nvars; ++i )
1482  {
1483  if( oracle->varlbs[i] > oracle->varubs[i] )
1484  {
1485  assert(EPSEQ(oracle->varlbs[i], oracle->varubs[i], SCIP_DEFAULT_EPSILON));
1486  oracle->varlbs[i] = oracle->varubs[i];
1487  }
1488  }
1489  }
1490  else
1491  for( i = 0; i < nvars; ++i )
1492  oracle->varubs[oracle->nvars+i] = oracle->infinity;
1493 
1494  if( varnames != NULL )
1495  {
1496  if( oracle->varnames == NULL )
1497  {
1498  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &oracle->varnames, oracle->varssize) );
1499  BMSclearMemoryArray(oracle->varnames, oracle->nvars);
1500  }
1501 
1502  for( i = 0; i < nvars; ++i )
1503  {
1504  if( varnames[i] != NULL )
1505  {
1506  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &oracle->varnames[oracle->nvars+i], varnames[i], strlen(varnames[i])+1) ); /*lint !e866*/
1507  }
1508  else
1509  oracle->varnames[oracle->nvars+i] = NULL;
1510  }
1511  }
1512  else if( oracle->varnames != NULL )
1513  {
1514  BMSclearMemoryArray(&oracle->varnames[oracle->nvars], nvars); /*lint !e866*/
1515  }
1516 
1517  BMSclearMemoryArray(&oracle->vardegrees[oracle->nvars], nvars); /*lint !e866*/
1518 
1519  /* @TODO update sparsity pattern by extending heslagoffsets */
1521 
1522  oracle->nvars += nvars;
1523 
1524  return SCIP_OKAY;
1525 }
1526 
1527 /** adds constraints
1528  *
1529  * linear coefficients: row(=constraint) oriented matrix;
1530  * quadratic coefficients: row oriented matrix for each constraint
1531  */
1533  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1534  int nconss, /**< number of constraints to add */
1535  const SCIP_Real* lhss, /**< array with left-hand sides of constraints, or NULL if all -infinity */
1536  const SCIP_Real* rhss, /**< array with right-hand sides of constraints, or NULL if all +infinity */
1537  const int* nlininds, /**< number of linear coefficients for each constraint, may be NULL in case of no linear part */
1538  int* const* lininds, /**< indices of variables for linear coefficients for each constraint, may be NULL in case of no linear part */
1539  SCIP_Real* const* linvals, /**< values of linear coefficient for each constraint, may be NULL in case of no linear part */
1540  const int* nquadelems, /**< number of elements in matrix of quadratic part for each constraint,
1541  * may be NULL in case of no quadratic part in any constraint */
1542  SCIP_QUADELEM* const* quadelems, /**< quadratic elements specifying quadratic part for each constraint, entry of array may be NULL in case of no quadratic part,
1543  * may be NULL in case of no quadratic part in any constraint */
1544  int* const* exprvaridxs, /**< NULL if no nonquadratic parts, otherwise epxrvaridxs[.] maps variable indices in expression tree to indices in nlp */
1545  SCIP_EXPRTREE* const* exprtrees, /**< NULL if no nonquadratic parts, otherwise exprtrees[.] gives nonquadratic part,
1546  * or NULL if no nonquadratic part in this constraint */
1547  const char** consnames /**< names of new constraints, or NULL if no names should be stored */
1548  )
1549 { /*lint --e{715}*/
1550  SCIP_NLPIORACLECONS* cons;
1551  SCIP_Bool addednlcon; /* whether a nonlinear constraint was added */
1552  int c;
1553 
1554  assert(oracle != NULL);
1555 
1556  SCIPdebugMessage("%p add constraints\n", (void*)oracle);
1557 
1558  if( nconss == 0 )
1559  return SCIP_OKAY;
1560 
1561  assert(nconss > 0);
1562 
1563  addednlcon = FALSE;
1564 
1565  invalidateJacobiSparsity(oracle); /* @TODO we could also update (extend) the sparsity pattern */
1566 
1567  SCIP_CALL( ensureConssSize(oracle, oracle->nconss + nconss) );
1568  for( c = 0; c < nconss; ++c )
1569  {
1570  SCIP_CALL( createConstraint(oracle->blkmem, &cons,
1571  nlininds != NULL ? nlininds[c] : 0,
1572  lininds != NULL ? lininds[c] : NULL,
1573  linvals != NULL ? linvals[c] : NULL,
1574  nquadelems != NULL ? nquadelems[c] : 0,
1575  quadelems != NULL ? quadelems[c] : NULL,
1576  exprvaridxs != NULL ? exprvaridxs[c] : NULL,
1577  exprtrees != NULL ? exprtrees[c] : NULL,
1578  lhss != NULL ? lhss[c] : -oracle->infinity,
1579  rhss != NULL ? rhss[c] : oracle->infinity,
1580  consnames != NULL ? consnames[c] : NULL
1581  ) );
1582 
1583  if( cons->nquadelems > 0 )
1584  addednlcon = TRUE;
1585 
1586  if( cons->exprtree != NULL )
1587  {
1588  addednlcon = TRUE;
1589  SCIP_CALL( SCIPexprintCompile(oracle->exprinterpreter, cons->exprtree) );
1590  }
1591 
1592  /* keep variable degrees updated */
1593  if( oracle->vardegreesuptodate )
1594  updateVariableDegreesCons(oracle, cons);
1595 
1596  oracle->conss[oracle->nconss+c] = cons;
1597  }
1598  oracle->nconss += nconss;
1599 
1600  if( addednlcon == TRUE )
1602 
1603  return SCIP_OKAY;
1604 }
1605 
1606 /** sets or overwrites objective, a minimization problem is expected
1607  *
1608  * May change sparsity pattern.
1609  */
1611  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1612  const SCIP_Real constant, /**< constant part of objective */
1613  int nlin, /**< number of linear variable coefficients */
1614  const int* lininds, /**< indices of linear variables, or NULL if no linear part */
1615  const SCIP_Real* linvals, /**< coefficients of linear variables, or NULL if no linear part */
1616  int nquadelems, /**< number of entries in matrix of quadratic part */
1617  const SCIP_QUADELEM* quadelems, /**< entries in matrix of quadratic part, may be NULL in case of no quadratic part */
1618  const int* exprvaridxs, /**< maps variable indices in expression tree to indices in nlp, or NULL if no nonquadratic part */
1619  const SCIP_EXPRTREE* exprtree /**< expression tree of nonquadratic part, or NULL if no nonquadratic part */
1620  )
1621 { /*lint --e{715}*/
1622  assert(oracle != NULL);
1623  assert(REALABS(constant) < oracle->infinity);
1624 
1625  SCIPdebugMessage("%p set objective\n", (void*)oracle);
1626 
1627  if( nquadelems > 0 || oracle->objective->quadsize > 0 || exprtree != NULL || oracle->objective->exprtree != NULL )
1629 
1630  /* clear previous objective */
1631  freeConstraint(oracle->blkmem, &oracle->objective);
1632 
1633  SCIP_CALL( createConstraint(oracle->blkmem, &oracle->objective,
1634  nlin, lininds, linvals, nquadelems, quadelems, exprvaridxs, exprtree, constant, constant, NULL) );
1635 
1636  if( oracle->objective->exprtree != NULL )
1637  {
1638  SCIP_CALL( SCIPexprintCompile(oracle->exprinterpreter, oracle->objective->exprtree) );
1639  }
1640 
1641  oracle->vardegreesuptodate = FALSE;
1642 
1643  return SCIP_OKAY;
1644 }
1645 
1646 /** change variable bounds */
1648  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1649  int nvars, /**< number of variables to change bounds */
1650  const int* indices, /**< indices of variables to change bounds */
1651  const SCIP_Real* lbs, /**< new lower bounds, or NULL if all should be -infty */
1652  const SCIP_Real* ubs /**< new upper bounds, or NULL if all should be +infty */
1653  )
1654 {
1655  int i;
1656 
1657  assert(oracle != NULL);
1658  assert(indices != NULL || nvars == 0);
1659 
1660  SCIPdebugMessage("%p chg var bounds\n", (void*)oracle);
1661 
1662  for( i = 0; i < nvars; ++i )
1663  {
1664  assert(indices != NULL);
1665  assert(indices[i] >= 0);
1666  assert(indices[i] < oracle->nvars);
1667 
1668  oracle->varlbs[indices[i]] = (lbs != NULL ? lbs[i] : -oracle->infinity);
1669  oracle->varubs[indices[i]] = (ubs != NULL ? ubs[i] : oracle->infinity);
1670 
1671  if( oracle->varlbs[indices[i]] > oracle->varubs[indices[i]] )
1672  {
1673  /* inconsistent bounds; let's assume it's due to rounding and make them equal */
1674  assert(EPSEQ(oracle->varlbs[indices[i]], oracle->varubs[indices[i]], SCIP_DEFAULT_EPSILON));
1675  oracle->varlbs[indices[i]] = oracle->varubs[indices[i]];
1676  }
1677  }
1678 
1679  return SCIP_OKAY;
1680 }
1681 
1682 /** change constraint bounds */
1684  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1685  int nconss, /**< number of constraints to change bounds */
1686  const int* indices, /**< indices of constraints to change bounds */
1687  const SCIP_Real* lhss, /**< new left-hand sides, or NULL if all should be -infty */
1688  const SCIP_Real* rhss /**< new right-hand sides, or NULL if all should be +infty */
1689  )
1690 {
1691  int i;
1692 
1693  assert(oracle != NULL);
1694  assert(indices != NULL || nconss == 0);
1695 
1696  SCIPdebugMessage("%p chg cons sides\n", (void*)oracle);
1697 
1698  for( i = 0; i < nconss; ++i )
1699  {
1700  assert(indices != NULL);
1701  assert(indices[i] >= 0);
1702  assert(indices[i] < oracle->nconss);
1703 
1704  oracle->conss[indices[i]]->lhs = (lhss != NULL ? lhss[i] : -oracle->infinity);
1705  oracle->conss[indices[i]]->rhs = (rhss != NULL ? rhss[i] : oracle->infinity);
1706  if( oracle->conss[indices[i]]->lhs > oracle->conss[indices[i]]->rhs )
1707  {
1708  assert(EPSEQ(oracle->conss[indices[i]]->lhs, oracle->conss[indices[i]]->rhs, SCIP_DEFAULT_EPSILON));
1709  oracle->conss[indices[i]]->lhs = oracle->conss[indices[i]]->rhs;
1710  }
1711  }
1712 
1713  return SCIP_OKAY;
1714 }
1715 
1716 /** deletes a set of variables */
1718  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1719  int* delstats /**< deletion status of vars in input (1 if var should be deleted, 0 if not);
1720  * new position of var in output (-1 if var was deleted) */
1721  )
1722 { /*lint --e{715}*/
1723  int c;
1724  int lastgood; /* index of the last variable that should be kept */
1725  SCIP_NLPIORACLECONS* cons;
1726 
1727  assert(oracle != NULL);
1728 
1729  SCIPdebugMessage("%p del var set\n", (void*)oracle);
1730 
1731  invalidateJacobiSparsity(oracle);
1733 
1734  lastgood = oracle->nvars - 1;
1735  while( lastgood >= 0 && delstats[lastgood] == 1 )
1736  --lastgood;
1737  if( lastgood < 0 )
1738  {
1739  /* all variables should be deleted */
1740  assert(oracle->nconss == 0); /* we could relax this by checking that all constraints are constant */
1741  assert(oracle->objective->exprtree == NULL || SCIPexprtreeGetNVars(oracle->objective->exprtree) == 0);
1742  oracle->objective->nquadelems = 0;
1743  oracle->objective->nlinidxs = 0;
1744  for( c = 0; c < oracle->nvars; ++c )
1745  delstats[c] = -1;
1746  freeVariables(oracle);
1747  return SCIP_OKAY;
1748  }
1749 
1750  /* delete variables at the end */
1751  for( c = oracle->nvars - 1; c > lastgood; --c )
1752  {
1753  if( oracle->varnames && oracle->varnames[c] != NULL )
1754  {
1755  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->varnames[c], strlen(oracle->varnames[c])+1); /*lint !e866*/
1756  }
1757  delstats[c] = -1;
1758  }
1759 
1760  /* go through variables from the beginning on
1761  * if variable should be deleted, free it and move lastgood variable to this position
1762  * then update lastgood */
1763  for( c = 0; c <= lastgood; ++c )
1764  {
1765  if( delstats[c] == 0 )
1766  { /* variable should not be deleted and is kept on position c */
1767  delstats[c] = c;
1768  continue;
1769  }
1770  assert(delstats[c] == 1); /* variable should be deleted */
1771 
1772  if( oracle->varnames && oracle->varnames[c] != NULL )
1773  {
1774  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->varnames[c], strlen(oracle->varnames[c])+1); /*lint !e866*/
1775  }
1776  delstats[c] = -1;
1777 
1778  /* move constraint at position lastgood to position c */
1779  SCIP_CALL( moveVariable(oracle, lastgood, c) );
1780  delstats[lastgood] = c; /* mark that lastgood variable is now at position c */
1781 
1782  /* move lastgood forward, delete variables on the way */
1783  --lastgood;
1784  while( lastgood > c && delstats[lastgood] == 1)
1785  {
1786  if( oracle->varnames && oracle->varnames[lastgood] != NULL )
1787  {
1788  BMSfreeBlockMemoryArray(oracle->blkmem, &oracle->varnames[lastgood], strlen(oracle->varnames[lastgood])+1); /*lint !e866*/
1789  }
1790  delstats[lastgood] = -1;
1791  --lastgood;
1792  }
1793  }
1794  assert(c == lastgood);
1795 
1796  for( c = -1; c < oracle->nconss; ++c )
1797  {
1798  cons = c < 0 ? oracle->objective : oracle->conss[c];
1799  assert(cons != NULL);
1800 
1801  /* update indices in linear part, sort indices, and then clear elements that are marked as deleted */
1802  mapIndices(delstats, cons->nlinidxs, cons->linidxs);
1803  SCIPsortIntReal(cons->linidxs, cons->lincoefs, cons->nlinidxs);
1804  clearDeletedLinearElements(oracle->blkmem, &cons->linidxs, &cons->lincoefs, &cons->nlinidxs);
1805 
1806  /* update indices in quadratic part, sort elements, and then clear elements that are marked as deleted */
1807  mapIndicesQuad(delstats, cons->quadsize, cons->quadelems);
1808  SCIPquadelemSort(cons->quadelems, cons->quadsize);
1809  clearDeletedQuadElements(oracle->blkmem, &cons->quadelems, &cons->quadsize);
1810 
1811  if( cons->exprtree != NULL )
1812  {
1813  mapIndices(delstats, SCIPexprtreeGetNVars(cons->exprtree), cons->exprvaridxs);
1814  /* assert that all variables from this expression have been deleted */
1815  assert(SCIPexprtreeGetNVars(cons->exprtree) == 0 || cons->exprvaridxs[SCIPexprtreeGetNVars(cons->exprtree)-1] == -1);
1816  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &cons->exprvaridxs, SCIPexprtreeGetNVars(cons->exprtree));
1817  SCIP_CALL( SCIPexprtreeFree(&cons->exprtree) );
1818  }
1819  }
1820 
1821  oracle->nvars = lastgood+1;
1822 
1823  return SCIP_OKAY;
1824 }
1825 
1826 /** deletes a set of constraints */
1828  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1829  int* delstats /**< array with deletion status of rows in input (1 if row should be deleted, 0 if not);
1830  * new position of row in output (-1 if row was deleted) */
1831  )
1832 { /*lint --e{715}*/
1833  int c;
1834  int lastgood; /* index of the last constraint that should be kept */
1835 
1836  assert(oracle != NULL);
1837 
1838  SCIPdebugMessage("%p del cons set\n", (void*)oracle);
1839 
1840  invalidateJacobiSparsity(oracle);
1842  oracle->vardegreesuptodate = FALSE;
1843 
1844  lastgood = oracle->nconss - 1;
1845  while( lastgood >= 0 && delstats[lastgood] == 1)
1846  --lastgood;
1847  if( lastgood < 0 )
1848  {
1849  /* all constraints should be deleted */
1850  for( c = 0; c < oracle->nconss; ++c )
1851  delstats[c] = -1;
1852  freeConstraints(oracle);
1853  return SCIP_OKAY;
1854  }
1855 
1856  /* delete constraints at the end */
1857  for( c = oracle->nconss - 1; c > lastgood; --c )
1858  {
1859  freeConstraint(oracle->blkmem, &oracle->conss[c]);
1860  assert(oracle->conss[c] == NULL);
1861  delstats[c] = -1;
1862  }
1863 
1864  /* go through constraint from the beginning on
1865  * if constraint should be deleted, free it and move lastgood constraint to this position
1866  * then update lastgood */
1867  for( c = 0; c <= lastgood; ++c )
1868  {
1869  if( delstats[c] == 0 )
1870  {
1871  /* constraint should not be deleted and is kept on position c */
1872  delstats[c] = c;
1873  continue;
1874  }
1875  assert(delstats[c] == 1); /* constraint should be deleted */
1876 
1877  freeConstraint(oracle->blkmem, &oracle->conss[c]);
1878  assert(oracle->conss[c] == NULL);
1879  delstats[c] = -1;
1880 
1881  /* move constraint at position lastgood to position c */
1882  oracle->conss[c] = oracle->conss[lastgood];
1883  assert(oracle->conss[c] != NULL);
1884  delstats[lastgood] = c; /* mark that lastgood constraint is now at position c */
1885  oracle->conss[lastgood] = NULL;
1886 
1887  /* move lastgood forward, delete constraints on the way */
1888  --lastgood;
1889  while( lastgood > c && delstats[lastgood] == 1)
1890  {
1891  freeConstraint(oracle->blkmem, &oracle->conss[lastgood]);
1892  assert(oracle->conss[lastgood] == NULL);
1893  delstats[lastgood] = -1;
1894  --lastgood;
1895  }
1896  }
1897  assert(c == lastgood);
1898 
1899  oracle->nconss = lastgood+1;
1900 
1901  return SCIP_OKAY;
1902 }
1903 
1904 /** changes linear coefficients in one constraint or objective */
1906  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
1907  int considx, /**< index of constraint where linear coefficients should be changed, or -1 for objective */
1908  int nentries, /**< number of coefficients to change */
1909  const int* varidxs, /**< array with indices of variables which coefficients should be changed */
1910  const SCIP_Real* newcoefs /**< array with new coefficients of variables */
1911  )
1912 { /*lint --e{715}*/
1913  SCIP_NLPIORACLECONS* cons;
1914  SCIP_Bool needsort;
1915  int i;
1916 
1917  SCIPdebugMessage("%p chg linear coefs\n", (void*)oracle);
1918 
1919  assert(oracle != NULL);
1920  assert(varidxs != NULL || nentries == 0);
1921  assert(newcoefs != NULL || nentries == 0);
1922  assert(considx >= -1);
1923  assert(considx < oracle->nconss);
1924 
1925  if( nentries == 0 )
1926  return SCIP_OKAY;
1927 
1928  SCIPdebugMessage("change %d linear coefficients in cons %d\n", nentries, considx);
1929 
1930  needsort = FALSE;
1931 
1932  cons = considx < 0 ? oracle->objective : oracle->conss[considx];
1933 
1934  if( cons->linsize == 0 )
1935  {
1936  /* first time we have linear coefficients in this constraint (or objective) */
1937  assert(cons->linidxs == NULL);
1938  assert(cons->lincoefs == NULL);
1939 
1940  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &cons->linidxs, varidxs, nentries) );
1941  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &cons->lincoefs, newcoefs, nentries) );
1942  cons->linsize = nentries;
1943  cons->nlinidxs = nentries;
1944 
1945  needsort = TRUE;
1946  }
1947  else
1948  {
1949  int pos;
1950 
1951  for( i = 0; i < nentries; ++i )
1952  {
1953  assert(varidxs[i] >= 0); /*lint !e613*/
1954  assert(varidxs[i] < oracle->nvars); /*lint !e613*/
1955 
1956  if( SCIPsortedvecFindInt(cons->linidxs, varidxs[i], cons->nlinidxs, &pos) ) /*lint !e613*/
1957  {
1958  SCIPdebugMessage("replace coefficient of var %d at pos %d by %g\n", varidxs[i], pos, newcoefs[i]); /*lint !e613*/
1959 
1960  cons->lincoefs[pos] = newcoefs[i]; /*lint !e613*/
1961 
1962  /* remember that we need to sort/merge/squeeze array if coefficient became zero here */
1963  needsort |= (newcoefs[i] == 0.0); /*lint !e613 !e514*/
1964  }
1965  else if( newcoefs[i] != 0.0 ) /*lint !e613*/
1966  {
1967  /* append new entry */
1968  SCIPdebugMessage("add coefficient of var %d at pos %d, value %g\n", varidxs[i], cons->nlinidxs, newcoefs[i]); /*lint !e613*/
1969 
1970  SCIP_CALL( ensureConsLinSize(oracle->blkmem, cons, cons->nlinidxs + (nentries-i)) );
1971  cons->linidxs[cons->nlinidxs] = varidxs[i]; /*lint !e613*/
1972  cons->lincoefs[cons->nlinidxs] = newcoefs[i]; /*lint !e613*/
1973  ++cons->nlinidxs;
1974 
1975  needsort = TRUE;
1976  }
1977  }
1978  }
1979 
1980  if( needsort )
1981  {
1982  int oldlen;
1983 
1984  invalidateJacobiSparsity(oracle);
1985 
1986  oldlen = cons->nlinidxs;
1987  sortLinearCoefficients(&cons->nlinidxs, cons->linidxs, cons->lincoefs);
1988 
1989  /* if sorting removed an entry, then the var degrees are not uptodate anymore */
1990  oracle->vardegreesuptodate &= (cons->nlinidxs == oldlen); /*lint !e514*/
1991 
1992  /* increase variable degrees of variables to 1 */
1993  if( oracle->vardegreesuptodate )
1994  for( i = 0; i < cons->nlinidxs; ++i )
1995  oracle->vardegrees[varidxs[i]] = MAX(1, oracle->vardegrees[varidxs[i]]); /*lint !e613*/
1996  }
1997 
1998  return SCIP_OKAY;
1999 }
2000 
2001 /** changes (or adds) coefficients in the quadratic part of one constraint or objective */
2003  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2004  int considx, /**< index of constraint where quadratic coefficients should be changed, or -1 for objective */
2005  int nquadelems, /**< number of entries in quadratic constraint to change */
2006  const SCIP_QUADELEM* quadelems /**< new elements in quadratic matrix (replacing already existing ones or adding new ones) */
2007  )
2008 { /*lint --e{715}*/
2009  SCIP_NLPIORACLECONS* cons;
2010  SCIP_Bool needsort;
2011  int i;
2012 
2013  SCIPdebugMessage("%p chg quad coefs\n", (void*)oracle);
2014 
2015  assert(oracle != NULL);
2016  assert(quadelems != NULL || nquadelems == 0);
2017  assert(considx >= -1);
2018  assert(considx < oracle->nconss);
2019 
2020  if( nquadelems == 0 )
2021  return SCIP_OKAY;
2022 
2023  needsort = FALSE;
2024 
2025  cons = considx < 0 ? oracle->objective : oracle->conss[considx];
2026 
2027  if( cons->quadsize == 0 )
2028  {
2029  /* first time we have quadratic coefficients in this constraint (or objective) */
2030  assert(cons->quadelems == NULL);
2031 
2032  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &cons->quadelems, quadelems, nquadelems) );
2033  cons->quadsize = nquadelems;
2034  cons->nquadelems = nquadelems;
2035 
2036  needsort = TRUE;
2037  }
2038  else
2039  {
2040  int pos;
2041 
2042  for( i = 0; i < nquadelems; ++i )
2043  {
2044  assert(quadelems[i].idx1 >= 0); /*lint !e613*/
2045  assert(quadelems[i].idx2 >= 0); /*lint !e613*/
2046  assert(quadelems[i].idx1 < oracle->nvars); /*lint !e613*/
2047  assert(quadelems[i].idx2 < oracle->nvars); /*lint !e613*/
2048 
2049  /* if we already have an entry for quadelems[i], then just replace the coefficient, otherwise append new entry */
2050  if( SCIPquadelemSortedFind(cons->quadelems, quadelems[i].idx1, quadelems[i].idx2, cons->nquadelems, &pos) ) /*lint !e613*/
2051  {
2052  SCIPdebugMessage("replace coefficient of var%d*var%d at pos %d by %g\n", quadelems[i].idx1, quadelems[i].idx2, pos, quadelems[i].coef); /*lint !e613*/
2053 
2054  cons->quadelems[pos].coef = quadelems[i].coef; /*lint !e613*/
2055 
2056  /* remember that we need to sort/merge/squeeze array if coefficient became zero here */
2057  needsort |= (quadelems[i].coef == 0.0); /*lint !e613 !e514*/
2058  }
2059  else
2060  {
2061  /* append new entry */
2062  SCIPdebugMessage("add coefficient of var%d*var%d at pos %d, value %g\n", quadelems[i].idx1, quadelems[i].idx2, cons->nquadelems, quadelems[i].coef); /*lint !e613*/
2063 
2064  SCIP_CALL( ensureConsQuadSize(oracle->blkmem, cons, cons->nquadelems + (nquadelems-i)) );
2065  cons->quadelems[cons->nquadelems] = quadelems[i]; /*lint !e613*/
2066  ++cons->nquadelems;
2067 
2068  needsort = TRUE;
2069  }
2070  }
2071  }
2072 
2073  if( needsort )
2074  {
2075  int oldsize;
2076 
2077  invalidateJacobiSparsity(oracle);
2079 
2080  oldsize = cons->nquadelems;
2081  SCIPquadelemSort(cons->quadelems, cons->nquadelems);
2082  SCIPquadelemSqueeze(cons->quadelems, cons->nquadelems, &cons->nquadelems);
2083 
2084  /* if sorting removed an entry, then the var degrees are not uptodate anymore */
2085  oracle->vardegreesuptodate &= (cons->nquadelems == oldsize); /*lint !e514*/
2086 
2087  /* increase variable degrees of variables to 2 */
2088  if( oracle->vardegreesuptodate )
2089  for( i = 0; i < cons->nquadelems; ++i )
2090  {
2091  oracle->vardegrees[cons->quadelems[i].idx1] = MAX(2, oracle->vardegrees[cons->quadelems[i].idx1]);
2092  oracle->vardegrees[cons->quadelems[i].idx2] = MAX(2, oracle->vardegrees[cons->quadelems[i].idx2]);
2093  }
2094  }
2095 
2096  return SCIP_OKAY;
2097 }
2098 
2099 /** replaces expression tree of one constraint or objective */
2101  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2102  int considx, /**< index of constraint where expression tree should be changed, or -1 for objective */
2103  const int* exprvaridxs, /**< problem indices of variables in expression tree */
2104  const SCIP_EXPRTREE* exprtree /**< new expression tree, or NULL */
2105  )
2106 {
2107  SCIP_NLPIORACLECONS* cons;
2108  int j;
2109 
2110  SCIPdebugMessage("%p chg exprtree\n", (void*)oracle);
2111 
2112  assert(oracle != NULL);
2113  assert(considx >= -1);
2114  assert(considx < oracle->nconss);
2115  assert((exprvaridxs != NULL) == (exprtree != NULL));
2116 
2118  invalidateJacobiSparsity(oracle);
2119 
2120  cons = considx < 0 ? oracle->objective : oracle->conss[considx];
2121 
2122  /* free previous expression tree */
2123  if( cons->exprtree != NULL )
2124  {
2125  BMSfreeBlockMemoryArray(oracle->blkmem, &cons->exprvaridxs, SCIPexprtreeGetNVars(cons->exprtree));
2127  oracle->vardegreesuptodate = FALSE;
2128  }
2129 
2130  /* if user did not want to set new tree, then we are done */
2131  if( exprtree == NULL )
2132  return SCIP_OKAY;
2133 
2134  assert(oracle->exprinterpreter != NULL);
2135 
2136  /* install new expression tree */
2137  SCIP_CALL( SCIPexprtreeCopy(oracle->blkmem, &cons->exprtree, (SCIP_EXPRTREE*)exprtree) );
2138  SCIP_CALL( SCIPexprintCompile(oracle->exprinterpreter, cons->exprtree) );
2139  SCIP_ALLOC( BMSduplicateBlockMemoryArray(oracle->blkmem, &cons->exprvaridxs, exprvaridxs, SCIPexprtreeGetNVars(cons->exprtree)) );
2140 
2141  /* increase variable degree to keep them up to date
2142  * could get more accurate degree via getMaxDegree function in exprtree, but no solver would use this information so far
2143  */
2144  if( oracle->vardegreesuptodate )
2145  for( j = 0; j < SCIPexprtreeGetNVars(cons->exprtree); ++j )
2146  {
2147  assert(cons->exprvaridxs[j] >= 0);
2148  assert(cons->exprvaridxs[j] < oracle->nvars);
2149  oracle->vardegrees[cons->exprvaridxs[j]] = INT_MAX;
2150  }
2151 
2152  return SCIP_OKAY;
2153 }
2154 
2155 /** changes one parameter of expression tree of one constraint or objective
2156  */
2158  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2159  int considx, /**< index of constraint where parameter should be changed in expression tree, or -1 for objective */
2160  int paramidx, /**< index of parameter */
2161  SCIP_Real paramval /**< new value of parameter */
2162  )
2163 {
2164  SCIPdebugMessage("%p chg expr param\n", (void*)oracle);
2165 
2166  assert(oracle != NULL);
2167  assert(considx >= -1);
2168  assert(considx < oracle->nconss);
2169  assert(paramidx >= 0);
2170  assert(considx >= 0 || oracle->objective->exprtree != NULL);
2171  assert(considx >= 0 || paramidx < SCIPexprtreeGetNParams(oracle->objective->exprtree));
2172  assert(considx == -1 || oracle->conss[considx]->exprtree != NULL);
2173  assert(considx == -1 || paramidx < SCIPexprtreeGetNParams(oracle->conss[considx]->exprtree));
2174 
2175  SCIPexprtreeSetParamVal(considx >= 0 ? oracle->conss[considx]->exprtree : oracle->objective->exprtree, paramidx, paramval);
2176 
2177  return SCIP_OKAY;
2178 }
2179 
2180 /** changes the constant value in the objective function
2181  */
2183  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2184  SCIP_Real objconstant /**< new value for objective constant */
2185  )
2186 {
2187  assert(oracle != NULL);
2188 
2189  SCIPdebugMessage("%p chg obj constant\n", (void*)oracle);
2190 
2191  oracle->objective->lhs = objconstant;
2192  oracle->objective->rhs = objconstant;
2193 
2194  return SCIP_OKAY;
2195 }
2196 
2197 /** gives the current number of variables */
2199  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2200  )
2201 {
2202  assert(oracle != NULL);
2203 
2204  return oracle->nvars;
2205 }
2206 
2207 /** gives the current number of constraints */
2209  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2210  )
2211 {
2212  assert(oracle != NULL);
2213 
2214  return oracle->nconss;
2215 }
2216 
2217 /** gives the variables lower bounds */
2219  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2220  )
2221 {
2222  assert(oracle != NULL);
2223 
2224  return oracle->varlbs;
2225 }
2226 
2227 /** gives the variables upper bounds */
2229  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2230  )
2231 {
2232  assert(oracle != NULL);
2233 
2234  return oracle->varubs;
2235 }
2236 
2237 /** gives the variables names, or NULL if not set */
2239  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2240  )
2241 {
2242  assert(oracle != NULL);
2243 
2244  return oracle->varnames;
2245 }
2246 
2247 /** Gives maximum degree of a variable w.r.t. objective and all constraints.
2248  * The degree of a variable is the degree of the summand where it appears in, and is infinity for nonpolynomial terms.
2249  */
2251  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2252  int varidx
2253  )
2254 {
2255  assert(oracle != NULL);
2256  assert(varidx >= 0);
2257  assert(varidx < oracle->nvars);
2258 
2259  updateVariableDegrees(oracle);
2260 
2261  return oracle->vardegrees[varidx];
2262 }
2263 
2264 /** Gives maximum degree of all variables w.r.t. objective and all constraints.
2265  * The degree of a variable is the degree of the summand where it appears in, and is infinity for nonpolynomial terms.
2266  */
2268  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2269  )
2270 {
2271  assert(oracle != NULL);
2272 
2273  updateVariableDegrees(oracle);
2274 
2275  return oracle->vardegrees;
2276 }
2277 
2278 /** gives left-hand side of a constraint */
2280  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2281  int considx /**< constraint index */
2282  )
2283 {
2284  assert(oracle != NULL);
2285  assert(considx >= 0);
2286  assert(considx < oracle->nconss);
2287 
2288  return oracle->conss[considx]->lhs;
2289 }
2290 
2291 /** gives right-hand side of a constraint */
2293  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2294  int considx /**< constraint index */
2295  )
2296 {
2297  assert(oracle != NULL);
2298  assert(considx >= 0);
2299  assert(considx < oracle->nconss);
2300 
2301  return oracle->conss[considx]->rhs;
2302 }
2303 
2304 /** gives name of a constraint, may be NULL */
2306  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2307  int considx /**< constraint index */
2308  )
2309 {
2310  assert(oracle != NULL);
2311  assert(considx >= 0);
2312  assert(considx < oracle->nconss);
2313 
2314  return oracle->conss[considx]->name;
2315 }
2316 
2317 /** gives maximum degree of a constraint or objective
2318  * The degree is the maximal degree of all summands,, and is infinity for nonpolynomial terms.
2319  */
2321  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2322  int considx /**< index of constraint for which the degree is requested, or -1 for objective */
2323  )
2324 {
2325  SCIP_NLPIORACLECONS* cons;
2326 
2327  assert(oracle != NULL);
2328  assert(considx >= -1);
2329  assert(considx < oracle->nconss);
2330 
2331  cons = considx < 0 ? oracle->objective : oracle->conss[considx];
2332 
2333  /* could do something more clever like exprtreeGetMaxDegree, but no solver uses this so far */
2334  if( cons->exprtree != NULL )
2335  return INT_MAX;
2336 
2337  if( cons->nquadelems > 0 )
2338  return 2;
2339 
2340  if( cons->nlinidxs > 0 )
2341  return 1;
2342 
2343  return 0;
2344 }
2345 
2346 /** Gives maximum degree over all constraints and the objective (or over all variables, resp.).
2347  * Thus, if this function returns 0, then the objective and all constraints are constant.
2348  * If it returns 1, then the problem in linear.
2349  * If it returns 2, then its a QP, QCP, or QCQP.
2350  * And if it returns > 2, then it is an NLP.
2351  */
2353  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2354  )
2355 {
2356  int i;
2357  int maxdegree;
2358 
2359  assert(oracle != NULL);
2360 
2361  SCIPdebugMessage("%p get max degree\n", (void*)oracle);
2362 
2363  updateVariableDegrees(oracle);
2364 
2365  maxdegree = 0;
2366  for( i = 0; i < oracle->nvars; ++i )
2367  if( oracle->vardegrees[i] > maxdegree )
2368  {
2369  maxdegree = oracle->vardegrees[i];
2370  if( maxdegree == INT_MAX )
2371  break;
2372  }
2373 
2374  return maxdegree;
2375 }
2376 
2377 /** Gives the evaluation capabilities that are shared among all expression trees in the problem. */
2379  SCIP_NLPIORACLE* oracle /**< pointer to NLPIORACLE data structure */
2380  )
2381 {
2382  int c;
2383  SCIP_EXPRINTCAPABILITY evalcapability;
2384 
2385  assert(oracle != NULL);
2386 
2387  if( oracle->objective->exprtree != NULL )
2388  evalcapability = SCIPexprintGetExprtreeCapability(oracle->exprinterpreter, oracle->objective->exprtree);
2389  else
2390  evalcapability = SCIP_EXPRINTCAPABILITY_ALL;
2391 
2392  for( c = 0; c < oracle->nconss; ++c )
2393  if( oracle->conss[c]->exprtree != NULL )
2394  evalcapability &= SCIPexprintGetExprtreeCapability(oracle->exprinterpreter, oracle->conss[c]->exprtree);
2395 
2396  return evalcapability;
2397 }
2398 
2399 /** evaluates the objective function in a given point */
2401  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2402  const SCIP_Real* x, /**< point where to evaluate */
2403  SCIP_Real* objval /**< pointer to store objective value */
2404  )
2405 {
2406  assert(oracle != NULL);
2407 
2408  SCIPdebugMessage("%p eval obj value\n", (void*)oracle);
2409 
2410  SCIP_CALL_QUIET( evalFunctionValue(oracle, oracle->objective, x, objval) );
2411 
2412  assert(oracle->objective->lhs == oracle->objective->rhs); /*lint !e777*/
2413  *objval += oracle->objective->lhs;
2414 
2415  return SCIP_OKAY;
2416 }
2417 
2418 /** evaluates one constraint function in a given point */
2420  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2421  int considx, /**< index of constraint to evaluate */
2422  const SCIP_Real* x, /**< point where to evaluate */
2423  SCIP_Real* conval /**< pointer to store constraint value */
2424  )
2425 {
2426  assert(oracle != NULL);
2427  assert(x != NULL || oracle->nvars == 0);
2428  assert(conval != NULL);
2429 
2430  SCIPdebugMessage("%p eval cons value\n", (void*)oracle);
2431 
2432  SCIP_CALL_QUIET( evalFunctionValue(oracle, oracle->conss[considx], x, conval) );
2433 
2434  return SCIP_OKAY;
2435 }
2436 
2437 /** evaluates all constraint functions in a given point */
2439  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2440  const SCIP_Real* x, /**< point where to evaluate */
2441  SCIP_Real* convals /**< buffer to store constraint values */
2442  )
2443 {
2444  int i;
2445 
2446  SCIPdebugMessage("%p eval cons values\n", (void*)oracle);
2447 
2448  assert(oracle != NULL);
2449  assert(x != NULL || oracle->nvars == 0);
2450  assert(convals != NULL);
2451 
2452  for( i = 0; i < oracle->nconss; ++i )
2453  {
2454  SCIP_CALL_QUIET( evalFunctionValue(oracle, oracle->conss[i], x, &convals[i]) );
2455  }
2456 
2457  return SCIP_OKAY;
2458 }
2459 
2460 /** computes the objective gradient in a given point
2461  *
2462  * @return SCIP_INVALIDDATA, if the function or its gradient could not be evaluated (domain error, etc.)
2463  */
2465  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2466  const SCIP_Real* x, /**< point where to evaluate */
2467  SCIP_Bool isnewx, /**< has the point x changed since the last call to some evaluation function? */
2468  SCIP_Real* objval, /**< pointer to store objective value */
2469  SCIP_Real* objgrad /**< pointer to store (dense) objective gradient */
2470  )
2471 {
2472  assert(oracle != NULL);
2473 
2474  SCIPdebugMessage("%p eval obj grad\n", (void*)oracle);
2475 
2476  SCIP_CALL_QUIET( evalFunctionGradient(oracle, oracle->objective, x, isnewx, objval, objgrad) );
2477 
2478  assert(oracle->objective->lhs == oracle->objective->rhs); /*lint !e777*/
2479  *objval += oracle->objective->lhs;
2480 
2481  return SCIP_OKAY;
2482 }
2483 
2484 /** computes a constraints gradient in a given point
2485  *
2486  * @return SCIP_INVALIDDATA, if the function or its gradient could not be evaluated (domain error, etc.)
2487  */
2489  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2490  const int considx, /**< index of constraint to compute gradient for */
2491  const SCIP_Real* x, /**< point where to evaluate */
2492  SCIP_Bool isnewx, /**< has the point x changed since the last call to some evaluation function? */
2493  SCIP_Real* conval, /**< pointer to store constraint value */
2494  SCIP_Real* congrad /**< pointer to store (dense) constraint gradient */
2495  )
2496 {
2497  assert(oracle != NULL);
2498  assert(x != NULL || oracle->nvars == 0);
2499  assert(conval != NULL);
2500 
2501  SCIPdebugMessage("%p eval cons grad\n", (void*)oracle);
2502 
2503  SCIP_CALL_QUIET( evalFunctionGradient(oracle, oracle->conss[considx], x, isnewx, conval, congrad) );
2504 
2505  return SCIP_OKAY;
2506 }
2507 
2508 /** gets sparsity pattern (rowwise) of Jacobian matrix
2509  *
2510  * Note that internal data is returned in *offset and *col, thus the user does not need to allocate memory there.
2511  * Adding or deleting constraints destroys the sparsity structure and make another call to this function necessary.
2512  */
2514  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2515  const int** offset, /**< pointer to store pointer that stores the offsets to each rows sparsity pattern in col, can be NULL */
2516  const int** col /**< pointer to store pointer that stores the indices of variables that appear in each row, offset[nconss] gives length of col, can be NULL */
2517  )
2518 {
2519  SCIP_NLPIORACLECONS* cons;
2520  SCIP_Bool* nzflag;
2521  int nnz;
2522  int maxnnz;
2523  int i;
2524  int j;
2525 
2526  assert(oracle != NULL);
2527 
2528  SCIPdebugMessage("%p get jacobian sparsity\n", (void*)oracle);
2529 
2530  if( oracle->jacoffsets != NULL )
2531  {
2532  assert(oracle->jaccols != NULL);
2533  if( offset != NULL )
2534  *offset = oracle->jacoffsets;
2535  if( col != NULL )
2536  *col = oracle->jaccols;
2537  return SCIP_OKAY;
2538  }
2539 
2540  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &oracle->jacoffsets, oracle->nconss + 1) );
2541 
2542  maxnnz = MIN(oracle->nvars, 10) * oracle->nconss; /* initial guess */
2543  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &oracle->jaccols, maxnnz) );
2544 
2545  if( maxnnz == 0 )
2546  {
2547  /* no variables */
2548  BMSclearMemoryArray(oracle->jacoffsets, oracle->nconss + 1);
2549  if( offset != NULL )
2550  *offset = oracle->jacoffsets;
2551  if( col != NULL )
2552  *col = oracle->jaccols;
2553  return SCIP_OKAY;
2554  }
2555  nnz = 0;
2556 
2557  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &nzflag, oracle->nvars) );
2558 
2559  for( i = 0; i < oracle->nconss; ++i )
2560  {
2561  oracle->jacoffsets[i] = nnz;
2562 
2563  cons = oracle->conss[i];
2564  assert(cons != NULL);
2565 
2566  if( cons->nquadelems == 0 && cons->exprtree == NULL )
2567  {
2568  /* for a linear constraint, we can just copy the linear indices from the constraint into the sparsity pattern */
2569  if( cons->nlinidxs > 0 )
2570  {
2571  SCIP_CALL( ensureIntArraySize(oracle->blkmem, &oracle->jaccols, &maxnnz, nnz + cons->nlinidxs) );
2572  BMScopyMemoryArray(&oracle->jaccols[nnz], cons->linidxs, cons->nlinidxs); /*lint !e866*/
2573  nnz += cons->nlinidxs;
2574  }
2575  continue;
2576  }
2577  else if( cons->nlinidxs == 0 && cons->nquadelems == 0 )
2578  {
2579  /* for a constraint with exprtree only, we can just copy the exprvaridxs from the constraint into the sparsity pattern */
2580  int nvars;
2581 
2582  assert(cons->exprtree != NULL); /* this had been the first case */
2583 
2584  nvars = SCIPexprtreeGetNVars(cons->exprtree);
2585  assert(cons->exprvaridxs != NULL || nvars == 0);
2586 
2587  if( nvars > 0 )
2588  {
2589  SCIP_CALL( ensureIntArraySize(oracle->blkmem, &oracle->jaccols, &maxnnz, nnz + nvars) );
2590  BMScopyMemoryArray(&oracle->jaccols[nnz], cons->exprvaridxs, nvars); /*lint !e866*/
2591  nnz += nvars;
2592  }
2593  continue;
2594  }
2595 
2596  /* check which variables appear in constraint i
2597  * @todo this could be done faster for very sparse constraint by assembling all appearing variables, sorting, and removing duplicates
2598  */
2599  BMSclearMemoryArray(nzflag, oracle->nvars); /*lint !e644*/
2600 
2601  for( j = 0; j < cons->nlinidxs; ++j )
2602  nzflag[cons->linidxs[j]] = TRUE;
2603 
2604  for( j = 0; j < cons->nquadelems; ++j )
2605  {
2606  nzflag[cons->quadelems[j].idx1] = TRUE;
2607  nzflag[cons->quadelems[j].idx2] = TRUE;
2608  }
2609 
2610  if( cons->exprvaridxs != NULL )
2611  {
2612  assert(cons->exprtree != NULL);
2613  for( j = SCIPexprtreeGetNVars(cons->exprtree)-1; j >= 0; --j )
2614  nzflag[cons->exprvaridxs[j]] = TRUE;
2615  }
2616 
2617  /* store variables indices in jaccols */
2618  for( j = 0; j < oracle->nvars; ++j )
2619  {
2620  if( nzflag[j] == FALSE )
2621  continue;
2622 
2623  SCIP_CALL( ensureIntArraySize(oracle->blkmem, &oracle->jaccols, &maxnnz, nnz + 1) );
2624  oracle->jaccols[nnz] = j;
2625  ++nnz;
2626  }
2627  }
2628 
2629  oracle->jacoffsets[oracle->nconss] = nnz;
2630 
2631  /* shrink jaccols array to nnz */
2632  if( nnz < maxnnz )
2633  {
2634  SCIP_ALLOC( BMSreallocBlockMemoryArray(oracle->blkmem, &oracle->jaccols, maxnnz, nnz) );
2635  }
2636 
2637  BMSfreeBlockMemoryArray(oracle->blkmem, &nzflag, oracle->nvars);
2638 
2639  if( offset != NULL )
2640  *offset = oracle->jacoffsets;
2641  if( col != NULL )
2642  *col = oracle->jaccols;
2643 
2644  return SCIP_OKAY;
2645 }
2646 
2647 /** evaluates the Jacobi matrix in a given point
2648  *
2649  * The values in the Jacobi matrix are returned in the same order as specified by the offset and col arrays obtained by SCIPnlpiOracleGetJacobianSparsity.
2650  * The user need to call SCIPnlpiOracleGetJacobianSparsity at least ones before using this function.
2651  *
2652  * @return SCIP_INVALIDDATA, if the Jacobian could not be evaluated (domain error, etc.)
2653  */
2655  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2656  const SCIP_Real* x, /**< point where to evaluate */
2657  SCIP_Bool isnewx, /**< has the point x changed since the last call to some evaluation function? */
2658  SCIP_Real* convals, /**< pointer to store constraint values, can be NULL */
2659  SCIP_Real* jacobi /**< pointer to store sparse jacobian values */
2660  )
2661 {
2662  SCIP_NLPIORACLECONS* cons;
2663  SCIP_RETCODE retcode;
2664  SCIP_Real* grad;
2665  SCIP_Real* xx;
2666  SCIP_Real nlval;
2667  int i;
2668  int j;
2669  int k;
2670  int l;
2671 
2672  SCIPdebugMessage("%p eval jacobian\n", (void*)oracle);
2673 
2674  assert(oracle != NULL);
2675  assert(jacobi != NULL);
2676 
2677  assert(oracle->jacoffsets != NULL);
2678  assert(oracle->jaccols != NULL);
2679 
2680  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &grad, oracle->nvars) );
2681  xx = NULL;
2682 
2683  retcode = SCIP_OKAY;
2684 
2685  j = oracle->jacoffsets[0];
2686  k = 0;
2687  for( i = 0; i < oracle->nconss; ++i )
2688  {
2689  cons = oracle->conss[i];
2690  assert(cons != NULL);
2691 
2692  if( cons->nquadelems == 0 && cons->exprtree == NULL )
2693  {
2694  /* for a linear constraint, we can just copy the linear coefs from the constraint into the jacobian */
2695  if( cons->nlinidxs > 0 )
2696  {
2697  BMScopyMemoryArray(&jacobi[k], cons->lincoefs, cons->nlinidxs); /*lint !e866*/
2698  j += cons->nlinidxs;
2699  k += cons->nlinidxs;
2700  }
2701  assert(j == oracle->jacoffsets[i+1]);
2702  continue;
2703  }
2704 
2705  if( cons->nlinidxs == 0 && cons->nquadelems == 0 )
2706  {
2707  /* for a constraint with exprtree only, we can just copy gradient of the exprtree from the constraint into jacobian */
2708  int nvars;
2709 
2710  assert(cons->exprtree != NULL); /* this had been the first case */
2711 
2712  nvars = SCIPexprtreeGetNVars(cons->exprtree);
2713  assert(nvars <= oracle->nvars);
2714  assert(cons->exprvaridxs != NULL || nvars == 0);
2715 
2716  if( nvars > 0 )
2717  {
2718  if( isnewx )
2719  {
2720  if( xx == NULL )
2721  {
2722  /* if no xx yet, alloc it; make it large enough in case we need it again */
2723  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &xx, oracle->nvars) );
2724  }
2725  for( l = 0; l < nvars; ++l )
2726  xx[l] = x[cons->exprvaridxs[l]]; /*lint !e613*/
2727  }
2728 
2729  SCIPdebugMessage("eval gradient of ");
2730  SCIPdebug( if( isnewx ) {printf("\nx ="); for( l = 0; l < nvars; ++l) printf(" %g", xx[l]); /*lint !e613*/ printf("\n");} )
2731 
2732  SCIP_CALL( SCIPexprintGrad(oracle->exprinterpreter, cons->exprtree, xx, isnewx, &nlval, grad) ); /*lint !e644*/
2733 
2734  SCIPdebug( printf("g ="); for( l = 0; l < nvars; ++l) printf(" %g", grad[l]); printf("\n"); )
2735 
2736  if( nlval != nlval || ABS(nlval) >= oracle->infinity ) /*lint !e777*/
2737  {
2738  SCIPdebugMessage("gradient evaluation yield invalid function value %g\n", nlval);
2739  retcode = SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
2740  break;
2741  }
2742  else
2743  {
2744  if( convals != NULL )
2745  convals[i] = nlval;
2746  for( l = 0; l < nvars; ++l )
2747  {
2748  assert(oracle->jaccols[j+l] == cons->exprvaridxs[l]);
2749  if( !SCIPisFinite(grad[l]) ) /*lint !e777*/
2750  {
2751  SCIPdebugMessage("gradient evaluation yield invalid gradient value %g\n", grad[l]);
2752  retcode = SCIP_INVALIDDATA; /* indicate that the function could not be evaluated at given point */
2753  break;
2754  }
2755  else
2756  jacobi[k++] = grad[l];
2757  }
2758  if( l < nvars )
2759  break;
2760  j += nvars;
2761  }
2762  }
2763  else if( convals != NULL )
2764  {
2765  SCIPdebugMessage("eval value of constant ");
2766 
2767  SCIP_CALL( SCIPexprintEval(oracle->exprinterpreter, cons->exprtree, NULL, &convals[i]) );
2768  }
2769  continue;
2770  }
2771 
2772  /* do dense eval @todo could do it sparse */
2773  retcode = SCIPnlpiOracleEvalConstraintGradient(oracle, i, x, isnewx, (convals ? &convals[i] : &nlval), grad);
2774  if( retcode != SCIP_OKAY )
2775  break;
2776 
2777  while( j < oracle->jacoffsets[i+1] )
2778  jacobi[k++] = grad[oracle->jaccols[j++]];
2779  }
2780 
2781  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &xx, oracle->nvars);
2782  BMSfreeBlockMemoryArray(oracle->blkmem, &grad, oracle->nvars);
2783 
2784  return retcode;
2785 }
2786 
2787 /** gets sparsity pattern of the Hessian matrix of the Lagrangian
2788  *
2789  * Note that internal data is returned in *offset and *col, thus the user must not allocate memory there.
2790  * Adding or deleting variables, objective, or constraints may destroy the sparsity structure and make another call to this function necessary.
2791  * Only elements of the lower left triangle and the diagonal are counted.
2792  */
2794  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2795  const int** offset, /**< pointer to store pointer that stores the offsets to each rows sparsity pattern in col, can be NULL */
2796  const int** col /**< pointer to store pointer that stores the indices of variables that appear in each row, offset[nconss] gives length of col, can be NULL */
2797  )
2798 {
2799  int** colnz; /* nonzeros in Hessian corresponding to one column */
2800  int* collen; /* collen[i] is length of array colnz[i] */
2801  int* colnnz; /* colnnz[i] is number of entries in colnz[i] (<= collen[i]) */
2802  int nnz;
2803  int i;
2804  int j;
2805  int cnt;
2806 
2807  assert(oracle != NULL);
2808 
2809  SCIPdebugMessage("%p get hessian lag sparsity\n", (void*)oracle);
2810 
2811  if( oracle->heslagoffsets != NULL )
2812  {
2813  assert(oracle->heslagcols != NULL);
2814  if( offset != NULL )
2815  *offset = oracle->heslagoffsets;
2816  if( col != NULL )
2817  *col = oracle->heslagcols;
2818  return SCIP_OKAY;
2819  }
2820 
2821  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &oracle->heslagoffsets, oracle->nvars + 1) );
2822 
2823  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &colnz, oracle->nvars) );
2824  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &collen, oracle->nvars) );
2825  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &colnnz, oracle->nvars) );
2826  BMSclearMemoryArray(colnz, oracle->nvars); /*lint !e644*/
2827  BMSclearMemoryArray(collen, oracle->nvars); /*lint !e644*/
2828  BMSclearMemoryArray(colnnz, oracle->nvars); /*lint !e644*/
2829  nnz = 0;
2830 
2831  if( oracle->objective->nquadelems != 0 )
2832  {
2833  SCIP_CALL( hessLagSparsitySetNzFlagForQuad(oracle, colnz, collen, colnnz, &nnz, oracle->objective->nquadelems, oracle->objective->quadelems) );
2834  }
2835 
2836  if( oracle->objective->exprtree != NULL )
2837  {
2838  SCIP_CALL( hessLagSparsitySetNzFlagForExprtree(oracle, colnz, collen, colnnz, &nnz, oracle->objective->exprvaridxs, oracle->objective->exprtree, oracle->nvars) );
2839  }
2840 
2841  for( i = 0; i < oracle->nconss; ++i )
2842  {
2843  if( oracle->conss[i]->nquadelems != 0 )
2844  {
2845  SCIP_CALL( hessLagSparsitySetNzFlagForQuad(oracle, colnz, collen, colnnz, &nnz, oracle->conss[i]->nquadelems, oracle->conss[i]->quadelems) );
2846  }
2847 
2848  if( oracle->conss[i]->exprtree != NULL )
2849  {
2850  SCIP_CALL( hessLagSparsitySetNzFlagForExprtree(oracle, colnz, collen, colnnz, &nnz, oracle->conss[i]->exprvaridxs, oracle->conss[i]->exprtree, oracle->nvars) );
2851  }
2852  }
2853 
2854  SCIP_ALLOC( BMSallocBlockMemoryArray(oracle->blkmem, &oracle->heslagcols, nnz) );
2855 
2856  /* set hessian sparsity from colnz, colnnz */
2857  cnt = 0;
2858  for( i = 0; i < oracle->nvars; ++i )
2859  {
2860  oracle->heslagoffsets[i] = cnt;
2861  for( j = 0; j < colnnz[i]; ++j )
2862  {
2863  assert(cnt < nnz);
2864  oracle->heslagcols[cnt++] = colnz[i][j];
2865  }
2866  BMSfreeBlockMemoryArrayNull(oracle->blkmem, &colnz[i], collen[i]); /*lint !e866*/
2867  collen[i] = 0;
2868  }
2869  oracle->heslagoffsets[oracle->nvars] = cnt;
2870  assert(cnt == nnz);
2871 
2872  BMSfreeBlockMemoryArray(oracle->blkmem, &colnz, oracle->nvars);
2873  BMSfreeBlockMemoryArray(oracle->blkmem, &colnnz, oracle->nvars);
2874  BMSfreeBlockMemoryArray(oracle->blkmem, &collen, oracle->nvars);
2875 
2876  if( offset != NULL )
2877  *offset = oracle->heslagoffsets;
2878  if( col != NULL )
2879  *col = oracle->heslagcols;
2880 
2881  return SCIP_OKAY;
2882 }
2883 
2884 /** evaluates the Hessian matrix of the Lagrangian in a given point
2885  *
2886  * The values in the Hessian matrix are returned in the same order as specified by the offset and col arrays obtained by SCIPnlpiOracleGetHessianLagSparsity.
2887  * The user must call SCIPnlpiOracleGetHessianLagSparsity at least ones before using this function.
2888  * Only elements of the lower left triangle and the diagonal are computed.
2889  *
2890  * @return SCIP_INVALIDDATA, if the Hessian could not be evaluated (domain error, etc.)
2891  */
2893  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2894  const SCIP_Real* x, /**< point where to evaluate */
2895  SCIP_Bool isnewx, /**< has the point x changed since the last call to some evaluation function? */
2896  SCIP_Real objfactor, /**< weight for objective function */
2897  const SCIP_Real* lambda, /**< weights (Lagrangian multipliers) for the constraints */
2898  SCIP_Real* hessian /**< pointer to store sparse hessian values */
2899  )
2900 { /*lint --e{715}*/
2901  int i;
2902 
2903  assert(oracle != NULL);
2904  assert(x != NULL);
2905  assert(lambda != NULL || oracle->nconss == 0);
2906  assert(hessian != NULL);
2907 
2908  assert(oracle->heslagoffsets != NULL);
2909  assert(oracle->heslagcols != NULL);
2910 
2911  SCIPdebugMessage("%p eval hessian lag\n", (void*)oracle);
2912 
2913  for( i = oracle->heslagoffsets[oracle->nvars] - 1; i >= 0; --i )
2914  hessian[i] = 0.0;
2915 
2916  if( objfactor != 0.0 )
2917  {
2918  SCIP_CALL( hessLagAddQuad(objfactor, oracle->objective->nquadelems, oracle->objective->quadelems, oracle->heslagoffsets, oracle->heslagcols, hessian) );
2919  SCIP_CALL_QUIET( hessLagAddExprtree(oracle, objfactor, x, isnewx, oracle->objective->exprvaridxs, oracle->objective->exprtree, oracle->heslagoffsets, oracle->heslagcols, hessian) );
2920  }
2921 
2922  for( i = 0; i < oracle->nconss; ++i )
2923  {
2924  assert( lambda != NULL ); /* for lint */
2925  if( lambda[i] == 0.0 )
2926  continue;
2927  SCIP_CALL( hessLagAddQuad(lambda[i], oracle->conss[i]->nquadelems, oracle->conss[i]->quadelems, oracle->heslagoffsets, oracle->heslagcols, hessian) );
2928  SCIP_CALL_QUIET( hessLagAddExprtree(oracle, lambda[i], x, isnewx, oracle->conss[i]->exprvaridxs, oracle->conss[i]->exprtree, oracle->heslagoffsets, oracle->heslagcols, hessian) );
2929  }
2930 
2931  return SCIP_OKAY;
2932 }
2933 
2934 /** prints the problem to a file. */
2936  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
2937  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
2938  FILE* file /**< file to print to, or NULL for standard output */
2939  )
2940 { /*lint --e{777} */
2941  int i;
2942  SCIP_Real lhs;
2943  SCIP_Real rhs;
2944 
2945  assert(oracle != NULL);
2946 
2947  SCIPdebugMessage("%p print problem\n", (void*)oracle);
2948 
2949  if( file == NULL )
2950  file = stdout;
2951 
2952  SCIPmessageFPrintInfo(messagehdlr, file, "NLPI Oracle %s: %d variables and %d constraints\n", oracle->name ? oracle->name : "", oracle->nvars, oracle->nconss);
2953  for( i = 0; i < oracle->nvars; ++i )
2954  {
2955  if( oracle->varnames != NULL && oracle->varnames[i] != NULL )
2956  SCIPmessageFPrintInfo(messagehdlr, file, "%10s", oracle->varnames[i]);
2957  else
2958  SCIPmessageFPrintInfo(messagehdlr, file, "x%09d", i);
2959  SCIPmessageFPrintInfo(messagehdlr, file, ": [%8g, %8g]", oracle->varlbs[i], oracle->varubs[i]);
2960  if( oracle->vardegreesuptodate )
2961  SCIPmessageFPrintInfo(messagehdlr, file, "\t degree: %d", oracle->vardegrees[i]);
2962  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
2963  }
2964 
2965  SCIPmessageFPrintInfo(messagehdlr, file, "objective: ");
2966  SCIP_CALL( printFunction(oracle, messagehdlr, file, oracle->objective, FALSE, FALSE) );
2967  if( oracle->objective->lhs != 0.0 )
2968  SCIPmessageFPrintInfo(messagehdlr, file, "%+.20g", oracle->objective->lhs);
2969  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
2970 
2971  for( i = 0; i < oracle->nconss; ++i )
2972  {
2973  if( oracle->conss[i]->name != NULL )
2974  SCIPmessageFPrintInfo(messagehdlr, file, "%10s", oracle->conss[i]->name);
2975  else
2976  SCIPmessageFPrintInfo(messagehdlr, file, "con%07d", i);
2977 
2978  lhs = oracle->conss[i]->lhs;
2979  rhs = oracle->conss[i]->rhs;
2980  SCIPmessageFPrintInfo(messagehdlr, file, ": ");
2981  if( lhs > -oracle->infinity && rhs < oracle->infinity && lhs != rhs )
2982  SCIPmessageFPrintInfo(messagehdlr, file, "%.20g <= ", lhs);
2983 
2984  SCIP_CALL( printFunction(oracle, messagehdlr, file, oracle->conss[i], FALSE, FALSE) );
2985 
2986  if( lhs == rhs )
2987  SCIPmessageFPrintInfo(messagehdlr, file, " = %.20g", rhs);
2988  else if( rhs < oracle->infinity )
2989  SCIPmessageFPrintInfo(messagehdlr, file, " <= %.20g", rhs);
2990  else if( lhs > -oracle->infinity )
2991  SCIPmessageFPrintInfo(messagehdlr, file, " >= %.20g", lhs);
2992 
2993  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
2994  }
2995 
2996  return SCIP_OKAY;
2997 }
2998 
2999 /** prints the problem to a file in GAMS format
3000  * If there are variable (equation, resp.) names with more than 9 characters, then variable (equation, resp.) names are prefixed with an unique identifier.
3001  * This is to make it easier to identify variables solution output in the listing file.
3002  * Names with more than 64 characters are shorten to 64 letters due to GAMS limits.
3003  */
3005  SCIP_NLPIORACLE* oracle, /**< pointer to NLPIORACLE data structure */
3006  SCIP_Real* initval, /**< starting point values for variables or NULL */
3007  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
3008  FILE* file /**< file to print to, or NULL for standard output */
3009  )
3010 { /*lint --e{777} */
3011  int i;
3012  int nllevel; /* level of nonlinearity of problem: linear = 0, quadratic, smooth nonlinear, nonsmooth */
3013  static const char* nllevelname[4] = { "LP", "QCP", "NLP", "DNLP" };
3014  char problemname[SCIP_MAXSTRLEN];
3015  char namebuf[70];
3016  SCIP_Bool havelongvarnames;
3017  SCIP_Bool havelongequnames;
3018 
3019  SCIPdebugMessage("%p print problem gams\n", (void*)oracle);
3020 
3021  assert(oracle != NULL);
3022 
3023  if( file == NULL )
3024  file = stdout;
3025 
3026  nllevel = 0;
3027 
3028  havelongvarnames = FALSE;
3029  for( i = 0; i < oracle->nvars; ++i )
3030  if( oracle->varnames != NULL && oracle->varnames[i] != NULL && strlen(oracle->varnames[i]) > 9 )
3031  {
3032  havelongvarnames = TRUE;
3033  break;
3034  }
3035 
3036  havelongequnames = FALSE;
3037  for( i = 0; i < oracle->nconss; ++i )
3038  if( oracle->conss[i]->name && strlen(oracle->conss[i]->name) > 9 )
3039  {
3040  havelongequnames = TRUE;
3041  break;
3042  }
3043 
3044  SCIPmessageFPrintInfo(messagehdlr, file, "$offlisting\n");
3045  SCIPmessageFPrintInfo(messagehdlr, file, "$offdigit\n");
3046  SCIPmessageFPrintInfo(messagehdlr, file, "* NLPI Oracle Problem %s\n", oracle->name ? oracle->name : "");
3047  SCIPmessageFPrintInfo(messagehdlr, file, "Variables ");
3048  for( i = 0; i < oracle->nvars; ++i )
3049  {
3050  printName(namebuf, oracle->varnames != NULL ? oracle->varnames[i] : NULL, i, 'x', NULL, havelongvarnames);
3051  SCIPmessageFPrintInfo(messagehdlr, file, "%s, ", namebuf);
3052  if( i % 10 == 9 )
3053  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
3054  }
3055  SCIPmessageFPrintInfo(messagehdlr, file, "NLPIORACLEOBJVAR;\n\n");
3056  for( i = 0; i < oracle->nvars; ++i )
3057  {
3058  char* name;
3059  name = oracle->varnames != NULL ? oracle->varnames[i] : NULL;
3060  if( oracle->varlbs[i] == oracle->varubs[i] )
3061  {
3062  printName(namebuf, name, i, 'x', NULL, havelongvarnames);
3063  SCIPmessageFPrintInfo(messagehdlr, file, "%s.fx = %.20g;\t", namebuf, oracle->varlbs[i]);
3064  }
3065  else
3066  {
3067  if( oracle->varlbs[i] > -oracle->infinity )
3068  {
3069  printName(namebuf, name, i, 'x', NULL, havelongvarnames);
3070  SCIPmessageFPrintInfo(messagehdlr, file, "%s.lo = %.20g;\t", namebuf, oracle->varlbs[i]);
3071  }
3072  if( oracle->varubs[i] < oracle->infinity )
3073  {
3074  printName(namebuf, name, i, 'x', NULL, havelongvarnames);
3075  SCIPmessageFPrintInfo(messagehdlr, file, "%s.up = %.20g;\t", namebuf, oracle->varubs[i]);
3076  }
3077  }
3078  if( initval != NULL )
3079  {
3080  printName(namebuf, name, i, 'x', NULL, havelongvarnames);
3081  SCIPmessageFPrintInfo(messagehdlr, file, "%s.l = %.20g;\t", namebuf, initval[i]);
3082  }
3083  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
3084  }
3085  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
3086 
3087  SCIPmessageFPrintInfo(messagehdlr, file, "Equations ");
3088  for( i = 0; i < oracle->nconss; ++i )
3089  {
3090  printName(namebuf, oracle->conss[i]->name, i, 'e', NULL, havelongequnames);
3091  SCIPmessageFPrintInfo(messagehdlr, file, "%s, ", namebuf);
3092 
3093  if( oracle->conss[i]->lhs > -oracle->infinity && oracle->conss[i]->rhs < oracle->infinity && oracle->conss[i]->lhs != oracle->conss[i]->rhs )
3094  {
3095  /* ranged row: add second constraint */
3096  printName(namebuf, oracle->conss[i]->name, i, 'e', "_RNG", havelongequnames);
3097  SCIPmessageFPrintInfo(messagehdlr, file, "%s, ", namebuf);
3098  }
3099  if( i % 10 == 9 )
3100  SCIPmessageFPrintInfo(messagehdlr, file, "\n");
3101  }
3102  SCIPmessageFPrintInfo(messagehdlr, file, "NLPIORACLEOBJ;\n\n");
3103 
3104  SCIPmessageFPrintInfo(messagehdlr, file, "NLPIORACLEOBJ.. NLPIORACLEOBJVAR =E= ");
3105  SCIP_CALL( printFunction(oracle, messagehdlr, file, oracle->objective, havelongvarnames, havelongequnames) );
3106  if( oracle->objective->lhs != 0.0 )
3107  SCIPmessageFPrintInfo(messagehdlr, file, "%+.20g", oracle->objective->lhs);
3108  SCIPmessageFPrintInfo(messagehdlr, file, ";\n");
3109 
3110  for( i = 0; i < oracle->nconss; ++i )
3111  {
3112  SCIP_Real lhs;
3113  SCIP_Real rhs;
3114 
3115  printName(namebuf, oracle->conss[i]->name, i, 'e', NULL, havelongequnames);
3116  SCIPmessageFPrintInfo(messagehdlr, file, "%s.. ", namebuf);
3117 
3118  SCIP_CALL( printFunction(oracle, messagehdlr, file, oracle->conss[i], havelongvarnames, havelongequnames) );
3119 
3120  lhs = oracle->conss[i]->lhs;
3121  rhs = oracle->conss[i]->rhs;
3122 
3123  if( lhs == rhs )
3124  SCIPmessageFPrintInfo(messagehdlr, file, " =E= %.20g", rhs);
3125  else if( rhs < oracle->infinity )
3126  SCIPmessageFPrintInfo(messagehdlr, file, " =L= %.20g", rhs);
3127  else if( lhs > -oracle->infinity )
3128  SCIPmessageFPrintInfo(messagehdlr, file, " =G= %.20g", lhs);
3129  else
3130  SCIPmessageFPrintInfo(messagehdlr, file, " =N= 0");
3131  SCIPmessageFPrintInfo(messagehdlr, file, ";\n");
3132 
3133  if( lhs > -oracle->infinity && rhs < oracle->infinity && lhs != rhs )
3134  {
3135  printName(namebuf, oracle->conss[i]->name, i, 'e', "_RNG", havelongequnames);
3136  SCIPmessageFPrintInfo(messagehdlr, file, "%s.. ", namebuf);
3137 
3138  SCIP_CALL( printFunction(oracle, messagehdlr, file, oracle->conss[i], havelongvarnames, havelongequnames) );
3139 
3140  SCIPmessageFPrintInfo(messagehdlr, file, " =G= %.20g;\n", lhs);
3141  }
3142 
3143  if( nllevel <= 0 && oracle->conss[i]->nquadelems > 0 )
3144  nllevel = 1;
3145  if( nllevel <= 1 && oracle->conss[i]->exprtree != NULL )
3146  nllevel = 2;
3147  if( nllevel <= 2 && oracle->conss[i]->exprtree != NULL && exprIsNonSmooth(SCIPexprtreeGetRoot(oracle->conss[i]->exprtree)) )
3148  nllevel = 3;
3149  }
3150 
3151  (void) SCIPsnprintf(problemname, SCIP_MAXSTRLEN, "%s", oracle->name ? oracle->name : "m");
3152 
3153  SCIPmessageFPrintInfo(messagehdlr, file, "Model %s / all /;\n", problemname);
3154  SCIPmessageFPrintInfo(messagehdlr, file, "option limrow = 0;\n");
3155  SCIPmessageFPrintInfo(messagehdlr, file, "option limcol = 0;\n");
3156  SCIPmessageFPrintInfo(messagehdlr, file, "Solve %s minimizing NLPIORACLEOBJVAR using %s;\n", problemname, nllevelname[nllevel]);
3157 
3158  return SCIP_OKAY;
3159 }
3160 
3161 /**@} */
void SCIPquadelemSort(SCIP_QUADELEM *quadelems, int nquadelems)
Definition: expr.c:9211
SCIP_RETCODE SCIPnlpiOraclePrintProblemGams(SCIP_NLPIORACLE *oracle, SCIP_Real *initval, SCIP_MESSAGEHDLR *messagehdlr, FILE *file)
Definition: nlpioracle.c:3004
SCIP_RETCODE SCIPnlpiOracleEvalConstraintValues(SCIP_NLPIORACLE *oracle, const SCIP_Real *x, SCIP_Real *convals)
Definition: nlpioracle.c:2438
#define BMSfreeBlockMemoryArrayNull(mem, ptr, num)
Definition: memory.h:456
#define NULL
Definition: def.h:246
const char * SCIPexprintGetName(void)
const SCIP_Real * SCIPnlpiOracleGetVarUbs(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2228
static void updateVariableDegrees(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:585
methods to interpret (evaluate) an expression tree "fast"
SCIP_RETCODE SCIPnlpiOracleGetJacobianSparsity(SCIP_NLPIORACLE *oracle, const int **offset, const int **col)
Definition: nlpioracle.c:2513
void SCIPexprtreePrint(SCIP_EXPRTREE *tree, SCIP_MESSAGEHDLR *messagehdlr, FILE *file, const char **varnames, const char **paramnames)
Definition: expr.c:8756
SCIP_EXPRINTCAPABILITY SCIPnlpiOracleGetEvalCapability(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2378
SCIP_RETCODE SCIPnlpiOracleGetHessianLagSparsity(SCIP_NLPIORACLE *oracle, const int **offset, const int **col)
Definition: nlpioracle.c:2793
int SCIPnlpiOracleGetNVars(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2198
SCIP_EXPROP SCIPexprGetOperator(SCIP_EXPR *expr)
Definition: expr.c:5693
#define infinity
Definition: gastrans.c:71
static SCIP_Bool exprIsNonSmooth(SCIP_EXPR *expr)
Definition: nlpioracle.c:1292
#define SCIP_MAXSTRLEN
Definition: def.h:267
static SCIP_RETCODE ensureConssSize(SCIP_NLPIORACLE *oracle, int minsize)
Definition: nlpioracle.c:141
static SCIP_RETCODE ensureIntArraySize(BMS_BLKMEM *blkmem, int **intarray, int *len, int minsize)
Definition: nlpioracle.c:218
SCIP_RETCODE SCIPnlpiOracleSetObjective(SCIP_NLPIORACLE *oracle, const SCIP_Real constant, int nlin, const int *lininds, const SCIP_Real *linvals, int nquadelems, const SCIP_QUADELEM *quadelems, const int *exprvaridxs, const SCIP_EXPRTREE *exprtree)
Definition: nlpioracle.c:1610
static SCIP_RETCODE hessLagAddExprtree(SCIP_NLPIORACLE *oracle, SCIP_Real weight, const SCIP_Real *x, SCIP_Bool new_x, int *exprvaridx, SCIP_EXPRTREE *exprtree, int *hesoffset, int *hescol, SCIP_Real *values)
Definition: nlpioracle.c:1090
static void freeVariables(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:519
SCIP_Real * lincoefs
Definition: nlpioracle.c:44
methods to store an NLP and request function, gradient, and hessian values
#define RESTRICT
Definition: def.h:258
static SCIP_RETCODE createConstraint(BMS_BLKMEM *blkmem, SCIP_NLPIORACLECONS **cons, int nlinidxs, const int *linidxs, const SCIP_Real *lincoefs, int nquadelems, const SCIP_QUADELEM *quadelems, const int *exprvaridxs, const SCIP_EXPRTREE *exprtree, SCIP_Real lhs, SCIP_Real rhs, const char *name)
Definition: nlpioracle.c:341
#define FALSE
Definition: def.h:72
static SCIP_RETCODE ensureVarsSize(SCIP_NLPIORACLE *oracle, int minsize)
Definition: nlpioracle.c:110
SCIP_Real SCIPnlpiOracleGetConstraintLhs(SCIP_NLPIORACLE *oracle, int considx)
Definition: nlpioracle.c:2279
#define EPSEQ(x, y, eps)
Definition: def.h:182
static void printName(char *buffer, char *name, int idx, char prefix, const char *suffix, SCIP_Bool longnames)
Definition: nlpioracle.c:1193
int SCIPsnprintf(char *t, int len, const char *s,...)
Definition: misc.c:10253
static void freeConstraint(BMS_BLKMEM *blkmem, SCIP_NLPIORACLECONS **cons)
Definition: nlpioracle.c:420
#define TRUE
Definition: def.h:71
#define SCIPdebug(x)
Definition: pub_message.h:74
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:53
SCIP_RETCODE SCIPnlpiOracleEvalObjectiveValue(SCIP_NLPIORACLE *oracle, const SCIP_Real *x, SCIP_Real *objval)
Definition: nlpioracle.c:2400
SCIP_RETCODE SCIPexprtreeCopy(BMS_BLKMEM *blkmem, SCIP_EXPRTREE **targettree, SCIP_EXPRTREE *sourcetree)
Definition: expr.c:8812
SCIP_RETCODE SCIPexprintCompile(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree)
static SCIP_RETCODE evalFunctionValue(SCIP_NLPIORACLE *oracle, SCIP_NLPIORACLECONS *cons, const SCIP_Real *x, SCIP_Real *val)
Definition: nlpioracle.c:739
static SCIP_RETCODE hessLagAddQuad(SCIP_Real weight, int length, SCIP_QUADELEM *quadelems, int *hesoffset, int *hescol, SCIP_Real *values)
Definition: nlpioracle.c:1055
static void invalidateJacobiSparsity(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:248
static SCIP_RETCODE printFunction(SCIP_NLPIORACLE *oracle, SCIP_MESSAGEHDLR *messagehdlr, FILE *file, SCIP_NLPIORACLECONS *cons, SCIP_Bool longvarnames, SCIP_Bool longequnames)
Definition: nlpioracle.c:1228
#define SCIPdebugMessage
Definition: pub_message.h:77
SCIP_EXPRINTCAPABILITY SCIPexprintGetExprtreeCapability(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree)
static void mapIndices(int *indexmap, int nindices, int *indices)
Definition: nlpioracle.c:612
SCIP_Bool SCIPquadelemSortedFind(SCIP_QUADELEM *quadelems, int idx1, int idx2, int nquadelems, int *pos)
Definition: expr.c:9236
unsigned int SCIP_EXPRINTCAPABILITY
#define BMSfreeMemory(ptr)
Definition: memory.h:134
void SCIPexprtreeSetParamVal(SCIP_EXPRTREE *tree, int paramidx, SCIP_Real paramval)
Definition: expr.c:8642
SCIP_RETCODE SCIPnlpiOracleEvalObjectiveGradient(SCIP_NLPIORACLE *oracle, const SCIP_Real *x, SCIP_Bool isnewx, SCIP_Real *objval, SCIP_Real *objgrad)
Definition: nlpioracle.c:2464
const char * SCIPnlpiOracleGetProblemName(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:1435
SCIP_RETCODE SCIPnlpiOracleDelConsSet(SCIP_NLPIORACLE *oracle, int *delstats)
Definition: nlpioracle.c:1827
int * heslagoffsets
Definition: nlpioracle.c:80
SCIP_RETCODE SCIPnlpiOracleChgObjConstant(SCIP_NLPIORACLE *oracle, SCIP_Real objconstant)
Definition: nlpioracle.c:2182
SCIP_VAR ** x
Definition: circlepacking.c:54
int SCIPnlpiOracleGetNConstraints(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2208
static void mapIndicesQuad(int *indexmap, int nelems, SCIP_QUADELEM *elems)
Definition: nlpioracle.c:712
static void clearDeletedQuadElements(BMS_BLKMEM *blkmem, SCIP_QUADELEM **quadelems, int *nquadelems)
Definition: nlpioracle.c:674
public methods for expressions, expression trees, expression graphs, and related stuff ...
#define SCIP_DEFAULT_EPSILON
Definition: def.h:163
static int calcGrowSize(int num)
Definition: nlpioracle.c:94
SCIP_Real coef
Definition: type_expr.h:104
int * jacoffsets
Definition: nlpioracle.c:77
#define BMSduplicateBlockMemoryArray(mem, ptr, source, num)
Definition: memory.h:450
int SCIPnlpiOracleGetConstraintDegree(SCIP_NLPIORACLE *oracle, int considx)
Definition: nlpioracle.c:2320
SCIP_RETCODE SCIPnlpiOracleChgExprtree(SCIP_NLPIORACLE *oracle, int considx, const int *exprvaridxs, const SCIP_EXPRTREE *exprtree)
Definition: nlpioracle.c:2100
static void sortLinearCoefficients(int *nidxs, int *idxs, SCIP_Real *coefs)
Definition: nlpioracle.c:292
SCIP_RETCODE SCIPnlpiOracleCreate(BMS_BLKMEM *blkmem, SCIP_NLPIORACLE **oracle)
Definition: nlpioracle.c:1328
#define SCIPerrorMessage
Definition: pub_message.h:45
SCIP_RETCODE SCIPexprintEval(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree, SCIP_Real *varvals, SCIP_Real *val)
const SCIP_Real * SCIPnlpiOracleGetVarLbs(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2218
SCIP_RETCODE SCIPexprintCreate(BMS_BLKMEM *blkmem, SCIP_EXPRINT **exprint)
SCIP_RETCODE SCIPnlpiOracleChgVarBounds(SCIP_NLPIORACLE *oracle, int nvars, const int *indices, const SCIP_Real *lbs, const SCIP_Real *ubs)
Definition: nlpioracle.c:1647
static void invalidateHessianLagSparsity(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:271
SCIP_RETCODE SCIPnlpiOracleAddVars(SCIP_NLPIORACLE *oracle, int nvars, const SCIP_Real *lbs, const SCIP_Real *ubs, const char **varnames)
Definition: nlpioracle.c:1447
#define REALABS(x)
Definition: def.h:181
int SCIPexprtreeGetNVars(SCIP_EXPRTREE *tree)
Definition: expr.c:8612
static SCIP_RETCODE evalFunctionGradient(SCIP_NLPIORACLE *oracle, SCIP_NLPIORACLECONS *cons, const SCIP_Real *x, SCIP_Bool isnewx, SCIP_Real *RESTRICT val, SCIP_Real *RESTRICT grad)
Definition: nlpioracle.c:820
#define SCIP_CALL(x)
Definition: def.h:358
static SCIP_RETCODE ensureConsLinSize(BMS_BLKMEM *blkmem, SCIP_NLPIORACLECONS *cons, int minsize)
Definition: nlpioracle.c:165
SCIP_VAR * h
Definition: circlepacking.c:59
SCIP_Real SCIPnlpiOracleGetConstraintRhs(SCIP_NLPIORACLE *oracle, int considx)
Definition: nlpioracle.c:2292
SCIP_EXPR * SCIPexprtreeGetRoot(SCIP_EXPRTREE *tree)
Definition: expr.c:8602
SCIP_Bool SCIPsortedvecFindInt(int *intarray, int val, int len, int *pos)
SCIP_Real SCIPnlpiOracleGetInfinity(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:1400
SCIP_RETCODE SCIPnlpiOracleFree(SCIP_NLPIORACLE **oracle)
Definition: nlpioracle.c:1355
static SCIP_RETCODE moveVariable(SCIP_NLPIORACLE *oracle, int fromidx, int toidx)
Definition: nlpioracle.c:479
#define BMSfreeBlockMemory(mem, ptr)
Definition: memory.h:453
static void clearDeletedLinearElements(BMS_BLKMEM *blkmem, int **linidxs, SCIP_Real **coefs, int *nidxs)
Definition: nlpioracle.c:632
SCIP_RETCODE SCIPnlpiOracleEvalConstraintGradient(SCIP_NLPIORACLE *oracle, const int considx, const SCIP_Real *x, SCIP_Bool isnewx, SCIP_Real *conval, SCIP_Real *congrad)
Definition: nlpioracle.c:2488
#define SCIP_EXPRINTCAPABILITY_ALL
public data structures and miscellaneous methods
static SCIP_RETCODE hessLagSparsitySetNzFlagForQuad(SCIP_NLPIORACLE *oracle, int **colnz, int *collen, int *colnnz, int *nzcount, int length, SCIP_QUADELEM *quadelems)
Definition: nlpioracle.c:944
SCIP_RETCODE SCIPnlpiOraclePrintProblem(SCIP_NLPIORACLE *oracle, SCIP_MESSAGEHDLR *messagehdlr, FILE *file)
Definition: nlpioracle.c:2935
SCIP_EXPR ** SCIPexprGetChildren(SCIP_EXPR *expr)
Definition: expr.c:5713
char ** varnames
Definition: nlpioracle.c:67
#define SCIP_Bool
Definition: def.h:69
SCIP_NLPIORACLECONS * objective
Definition: nlpioracle.c:75
#define BMSallocBlockMemoryArray(mem, ptr, num)
Definition: memory.h:442
SCIP_RETCODE SCIPnlpiOracleSetProblemName(SCIP_NLPIORACLE *oracle, const char *name)
Definition: nlpioracle.c:1412
static void updateVariableDegreesCons(SCIP_NLPIORACLE *oracle, SCIP_NLPIORACLECONS *cons)
Definition: nlpioracle.c:552
SCIP_RETCODE SCIPnlpiOracleAddConstraints(SCIP_NLPIORACLE *oracle, int nconss, const SCIP_Real *lhss, const SCIP_Real *rhss, const int *nlininds, int *const *lininds, SCIP_Real *const *linvals, const int *nquadelems, SCIP_QUADELEM *const *quadelems, int *const *exprvaridxs, SCIP_EXPRTREE *const *exprtrees, const char **consnames)
Definition: nlpioracle.c:1532
#define BMSfreeBlockMemoryArray(mem, ptr, num)
Definition: memory.h:455
void SCIPquadelemSqueeze(SCIP_QUADELEM *quadelems, int nquadelems, int *nquadelemsnew)
Definition: expr.c:9288
int SCIPexprGetNChildren(SCIP_EXPR *expr)
Definition: expr.c:5703
#define MIN(x, y)
Definition: def.h:216
SCIP_Real * varubs
Definition: nlpioracle.c:66
SCIP_RETCODE SCIPnlpiOracleEvalConstraintValue(SCIP_NLPIORACLE *oracle, int considx, const SCIP_Real *x, SCIP_Real *conval)
Definition: nlpioracle.c:2419
SCIP_Real * varlbs
Definition: nlpioracle.c:65
SCIP_RETCODE SCIPexprtreeFree(SCIP_EXPRTREE **tree)
Definition: expr.c:8852
#define EPSLE(x, y, eps)
Definition: def.h:184
SCIP_RETCODE SCIPnlpiOracleChgLinearCoefs(SCIP_NLPIORACLE *oracle, int considx, int nentries, const int *varidxs, const SCIP_Real *newcoefs)
Definition: nlpioracle.c:1905
#define BMScopyMemoryArray(ptr, source, num)
Definition: memory.h:123
SCIP_RETCODE SCIPnlpiOracleChgQuadCoefs(SCIP_NLPIORACLE *oracle, int considx, int nquadelems, const SCIP_QUADELEM *quadelems)
Definition: nlpioracle.c:2002
SCIP_RETCODE SCIPexprintHessianDense(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree, SCIP_Real *varvals, SCIP_Bool new_varvals, SCIP_Real *val, SCIP_Real *hessian)
static SCIP_RETCODE hessLagSparsitySetNzFlagForExprtree(SCIP_NLPIORACLE *oracle, int **colnz, int *collen, int *colnnz, int *nzcount, int *exprvaridx, SCIP_EXPRTREE *exprtree, int dim)
Definition: nlpioracle.c:984
SCIP_RETCODE SCIPnlpiOracleChgConsSides(SCIP_NLPIORACLE *oracle, int nconss, const int *indices, const SCIP_Real *lhss, const SCIP_Real *rhss)
Definition: nlpioracle.c:1683
#define BMSclearMemory(ptr)
Definition: memory.h:118
SCIP_RETCODE SCIPexprintGrad(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree, SCIP_Real *varvals, SCIP_Bool new_varvals, SCIP_Real *val, SCIP_Real *gradient)
SCIP_Real infinity
Definition: nlpioracle.c:60
static void freeConstraints(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:453
static SCIP_RETCODE ensureConsQuadSize(BMS_BLKMEM *blkmem, SCIP_NLPIORACLECONS *cons, int minsize)
Definition: nlpioracle.c:192
#define SCIP_CALL_QUIET(x)
Definition: def.h:333
SCIP_RETCODE SCIPnlpiOracleDelVarSet(SCIP_NLPIORACLE *oracle, int *delstats)
Definition: nlpioracle.c:1717
#define MAX(x, y)
Definition: def.h:215
char * SCIPnlpiOracleGetConstraintName(SCIP_NLPIORACLE *oracle, int considx)
Definition: nlpioracle.c:2305
#define SCIP_DEFAULT_INFINITY
Definition: def.h:162
SCIP_QUADELEM * quadelems
Definition: nlpioracle.c:48
int * vardegrees
Definition: nlpioracle.c:68
SCIP_RETCODE SCIPnlpiOracleChgExprParam(SCIP_NLPIORACLE *oracle, int considx, int paramidx, SCIP_Real paramval)
Definition: nlpioracle.c:2157
int SCIPnlpiOracleGetVarDegree(SCIP_NLPIORACLE *oracle, int varidx)
Definition: nlpioracle.c:2250
SCIP_RETCODE SCIPnlpiOracleEvalHessianLag(SCIP_NLPIORACLE *oracle, const SCIP_Real *x, SCIP_Bool isnewx, SCIP_Real objfactor, const SCIP_Real *lambda, SCIP_Real *hessian)
Definition: nlpioracle.c:2892
public methods for message output
SCIP_Bool vardegreesuptodate
Definition: nlpioracle.c:69
void SCIPmessageFPrintInfo(SCIP_MESSAGEHDLR *messagehdlr, FILE *file, const char *formatstr,...)
Definition: message.c:608
#define SCIP_Real
Definition: def.h:157
#define BMSallocMemory(ptr)
Definition: memory.h:108
SCIP_EXPRINT * exprinterpreter
Definition: nlpioracle.c:84
SCIP_RETCODE SCIPexprintHessianSparsityDense(SCIP_EXPRINT *exprint, SCIP_EXPRTREE *tree, SCIP_Real *varvals, SCIP_Bool *sparsity)
SCIP_RETCODE SCIPnlpiOracleSetInfinity(SCIP_NLPIORACLE *oracle, SCIP_Real infinity)
Definition: nlpioracle.c:1384
#define SCIPisFinite(x)
Definition: pub_misc.h:1826
int SCIPexprtreeGetNParams(SCIP_EXPRTREE *tree)
Definition: expr.c:8622
BMS_BLKMEM * blkmem
Definition: nlpioracle.c:59
SCIP_RETCODE SCIPnlpiOracleEvalJacobian(SCIP_NLPIORACLE *oracle, const SCIP_Real *x, SCIP_Bool isnewx, SCIP_Real *convals, SCIP_Real *jacobi)
Definition: nlpioracle.c:2654
#define BMSallocBlockMemory(mem, ptr)
Definition: memory.h:440
SCIP_RETCODE SCIPexprintFree(SCIP_EXPRINT **exprint)
SCIP_EXPRTREE * exprtree
Definition: nlpioracle.c:51
#define BMSclearMemoryArray(ptr, num)
Definition: memory.h:119
struct BMS_BlkMem BMS_BLKMEM
Definition: memory.h:426
char ** SCIPnlpiOracleGetVarNames(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2238
#define SCIP_CALL_ABORT(x)
Definition: def.h:337
#define SCIP_ALLOC(x)
Definition: def.h:369
int * SCIPnlpiOracleGetVarDegrees(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2267
void SCIPsortedvecInsertInt(int *intarray, int keyval, int *len, int *pos)
#define BMSreallocBlockMemoryArray(mem, ptr, oldnum, newnum)
Definition: memory.h:446
#define ABS(x)
Definition: def.h:211
int * heslagcols
Definition: nlpioracle.c:81
int SCIPnlpiOracleGetMaxDegree(SCIP_NLPIORACLE *oracle)
Definition: nlpioracle.c:2352
SCIP_NLPIORACLECONS ** conss
Definition: nlpioracle.c:73
void SCIPsortIntReal(int *intarray, SCIP_Real *realarray, int len)