Scippy

SCIP

Solving Constraint Integer Programs

branch_relpscost.c File Reference

Detailed Description

reliable pseudo costs branching rule

Author
Tobias Achterberg
Timo Berthold
Gerald Gamrath

Definition in file branch_relpscost.c.

#include <assert.h>
#include <string.h>
#include "scip/branch_relpscost.h"
#include "scip/cons_and.h"

Go to the source code of this file.

Macros

#define BRANCHRULE_NAME   "relpscost"
 
#define BRANCHRULE_DESC   "reliability branching on pseudo cost values"
 
#define BRANCHRULE_PRIORITY   10000
 
#define BRANCHRULE_MAXDEPTH   -1
 
#define BRANCHRULE_MAXBOUNDDIST   1.0
 
#define DEFAULT_CONFLICTWEIGHT   0.01
 
#define DEFAULT_CONFLENGTHWEIGHT   0.0
 
#define DEFAULT_INFERENCEWEIGHT   0.0001
 
#define DEFAULT_CUTOFFWEIGHT   0.0001
 
#define DEFAULT_PSCOSTWEIGHT   1.0
 
#define DEFAULT_NLSCOREWEIGHT   0.1
 
#define DEFAULT_MINRELIABLE   1.0
 
#define DEFAULT_MAXRELIABLE   5.0
 
#define DEFAULT_SBITERQUOT   0.5
 
#define DEFAULT_SBITEROFS   100000
 
#define DEFAULT_MAXLOOKAHEAD   9
 
#define DEFAULT_INITCAND   100
 
#define DEFAULT_INITITER   0
 
#define DEFAULT_MAXBDCHGS   5
 
#define DEFAULT_MAXPROPROUNDS   -2
 
#define DEFAULT_PROBINGBOUNDS   TRUE
 
#define DEFAULT_USERELERRORFORRELIABILITY   FALSE
 
#define DEFAULT_LOWERRORTOL   0.05
 
#define DEFAULT_HIGHERRORTOL   1.0
 
#define DEFAULT_USEHYPTESTFORRELIABILITY   FALSE
 
#define DEFAULT_USEDYNAMICCONFIDENCE   FALSE
 
#define DEFAULT_STORESEMIINITCOSTS   FALSE
 
#define DEFAULT_USESBLOCALINFO   FALSE
 
#define DEFAULT_CONFIDENCELEVEL   2
 
#define DEFAULT_SKIPBADINITCANDS   TRUE
 
#define DEFAULT_STARTRANDSEED   12345
 
#define DEFAULT_RANDINITORDER   FALSE
 

Functions

static SCIP_RETCODE binvarGetActiveProbindex (SCIP *scip, SCIP_VAR *var, int *probindex)
 
static SCIP_RETCODE countNonlinearities (SCIP *scip, int *nlcount, int nlcountsize, int *nlcountmax)
 
static SCIP_RETCODE branchruledataEnsureNlcount (SCIP *scip, SCIP_BRANCHRULEDATA *branchruledata)
 
static SCIP_Real calcNlscore (SCIP *scip, int *nlcount, int nlcountmax, int probindex)
 
static SCIP_Real calcScore (SCIP *scip, SCIP_BRANCHRULEDATA *branchruledata, SCIP_Real conflictscore, SCIP_Real avgconflictscore, SCIP_Real conflengthscore, SCIP_Real avgconflengthscore, SCIP_Real inferencescore, SCIP_Real avginferencescore, SCIP_Real cutoffscore, SCIP_Real avgcutoffscore, SCIP_Real pscostscore, SCIP_Real avgpscostscore, SCIP_Real nlscore, SCIP_Real frac)
 
static SCIP_RETCODE addBdchg (SCIP *scip, int **bdchginds, SCIP_BOUNDTYPE **bdchgtypes, SCIP_Real **bdchgbounds, int *nbdchgs, int ind, SCIP_BOUNDTYPE type, SCIP_Real bound)
 
static void freeBdchgs (SCIP *scip, int **bdchginds, SCIP_BOUNDTYPE **bdchgtypes, SCIP_Real **bdchgbounds, int *nbdchgs)
 
static SCIP_RETCODE applyBdchgs (SCIP *scip, SCIP_VAR **vars, int *bdchginds, SCIP_BOUNDTYPE *bdchgtypes, SCIP_Real *bdchgbounds, int nbdchgs, SCIP_RESULT *result)
 
static SCIP_RETCODE execRelpscost (SCIP *scip, SCIP_BRANCHRULE *branchrule, SCIP_Bool allowaddcons, SCIP_VAR **branchcands, SCIP_Real *branchcandssol, SCIP_Real *branchcandsfrac, int nbranchcands, SCIP_Bool executebranch, SCIP_RESULT *result)
 
static SCIP_DECL_BRANCHCOPY (branchCopyRelpscost)
 
static SCIP_DECL_BRANCHFREE (branchFreeRelpscost)
 
static SCIP_DECL_BRANCHINITSOL (branchInitsolRelpscost)
 
static SCIP_DECL_BRANCHEXITSOL (branchExitsolRelpscost)
 
static SCIP_DECL_BRANCHEXECLP (branchExeclpRelpscost)
 
SCIP_RETCODE SCIPincludeBranchruleRelpscost (SCIP *scip)
 
SCIP_RETCODE SCIPexecRelpscostBranching (SCIP *scip, SCIP_Bool allowaddcons, SCIP_VAR **branchcands, SCIP_Real *branchcandssol, SCIP_Real *branchcandsfrac, int nbranchcands, SCIP_Bool executebranching, SCIP_RESULT *result)
 

Macro Definition Documentation

#define BRANCHRULE_NAME   "relpscost"
#define BRANCHRULE_DESC   "reliability branching on pseudo cost values"

Definition at line 32 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define BRANCHRULE_PRIORITY   10000

Definition at line 33 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define BRANCHRULE_MAXDEPTH   -1

Definition at line 34 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define BRANCHRULE_MAXBOUNDDIST   1.0

Definition at line 35 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_CONFLICTWEIGHT   0.01

weight in score calculations for conflict score

Definition at line 37 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_CONFLENGTHWEIGHT   0.0

weight in score calculations for conflict length score

Definition at line 38 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_INFERENCEWEIGHT   0.0001

weight in score calculations for inference score

Definition at line 39 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_CUTOFFWEIGHT   0.0001

weight in score calculations for cutoff score

Definition at line 40 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_PSCOSTWEIGHT   1.0

weight in score calculations for pseudo cost score

Definition at line 41 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_NLSCOREWEIGHT   0.1

weight in score calculations for nlcount score

Definition at line 42 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_MINRELIABLE   1.0

minimal value for minimum pseudo cost size to regard pseudo cost value as reliable

Definition at line 43 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_MAXRELIABLE   5.0

maximal value for minimum pseudo cost size to regard pseudo cost value as reliable

Definition at line 44 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_SBITERQUOT   0.5

maximal fraction of strong branching LP iterations compared to normal iterations

Definition at line 45 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_SBITEROFS   100000

additional number of allowed strong branching LP iterations

Definition at line 46 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_MAXLOOKAHEAD   9

maximal number of further variables evaluated without better score

Definition at line 47 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_INITCAND   100

maximal number of candidates initialized with strong branching per node

Definition at line 48 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_INITITER   0

iteration limit for strong branching initialization of pseudo cost entries (0: auto)

Definition at line 49 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_MAXBDCHGS   5

maximal number of bound tightenings before the node is reevaluated (-1: unlimited)

Definition at line 50 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_MAXPROPROUNDS   -2

maximum number of propagation rounds to be performed during strong branching before solving the LP (-1: no limit, -2: parameter settings)

Definition at line 51 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_PROBINGBOUNDS   TRUE

should valid bounds be identified in a probing-like fashion during strong branching (only with propagation)?

Definition at line 54 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_USERELERRORFORRELIABILITY   FALSE

should reliability be based on relative errors?

Definition at line 57 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_LOWERRORTOL   0.05

lowest tolerance beneath which relative errors are reliable

Definition at line 58 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_HIGHERRORTOL   1.0

highest tolerance beneath which relative errors are reliable

Definition at line 59 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_USEHYPTESTFORRELIABILITY   FALSE

should the strong branching decision be based on a hypothesis test?

Definition at line 60 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_USEDYNAMICCONFIDENCE   FALSE

should the confidence level be adjusted dynamically?

Definition at line 61 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_STORESEMIINITCOSTS   FALSE

should strong branching result be considered for pseudo costs if the other direction was infeasible?

Definition at line 62 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_USESBLOCALINFO   FALSE

should the scoring function use only local cutoff and inference information obtained for strong branching candidates?

Definition at line 63 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_CONFIDENCELEVEL   2

The confidence level for statistical methods, between 0 (Min) and 4 (Max).

Definition at line 64 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_SKIPBADINITCANDS   TRUE

should branching rule skip candidates that have a low probability to be better than the best strong-branching or pseudo-candidate?

Definition at line 65 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_STARTRANDSEED   12345

start random seed for random number generation

Definition at line 68 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

#define DEFAULT_RANDINITORDER   FALSE

should candidates be initialized in randomized order?

Definition at line 69 of file branch_relpscost.c.

Referenced by SCIPincludeBranchruleRelpscost().

Function Documentation

static SCIP_RETCODE binvarGetActiveProbindex ( SCIP scip,
SCIP_VAR var,
int *  probindex 
)
static

return probindex of variable or corresponding active variable (if negated or aggregated) or -1 (if multiaggregated)

Parameters
scipSCIP data structure
varbinary variable
probindexbuffer to store probindex

Definition at line 118 of file branch_relpscost.c.

References countNonlinearities(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_FIXED, SCIPgetBinvarRepresentative(), SCIPvarGetNegationVar(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarIsActive(), SCIPvarIsBinary(), and SCIPvarIsNegated().

Referenced by countNonlinearities().

static SCIP_RETCODE countNonlinearities ( SCIP scip,
int *  nlcount,
int  nlcountsize,
int *  nlcountmax 
)
static

counts number of nonlinear constraints in which each variable appears

Parameters
scipSCIP data structure
nlcountpointer to array for storing count values
nlcountsizebuffer for storing length of nlcount array
nlcountmaxbuffer for storing maximum value in nlcount array

Definition at line 152 of file branch_relpscost.c.

References binvarGetActiveProbindex(), BMSclearMemoryArray, branchruledataEnsureNlcount(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_FIXED, SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPfindConshdlr(), SCIPgetNLPVarsNonlinearity(), SCIPgetNNLPVars(), SCIPgetNVarsAnd(), SCIPgetResultantAnd(), SCIPgetVarsAnd(), SCIPgetVarsData(), SCIPisNLPConstructed(), and SCIPvarGetStatus().

Referenced by binvarGetActiveProbindex(), and branchruledataEnsureNlcount().

static SCIP_RETCODE branchruledataEnsureNlcount ( SCIP scip,
SCIP_BRANCHRULEDATA branchruledata 
)
static
Parameters
scipSCIP data structure
branchruledatabranching rule data

Definition at line 235 of file branch_relpscost.c.

References BMSclearMemoryArray, calcNlscore(), countNonlinearities(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBlockMemoryArray, SCIPfreeBlockMemoryArrayNull, SCIPgetNVars(), and SCIPreallocBlockMemoryArray.

Referenced by countNonlinearities(), and execRelpscost().

static SCIP_Real calcNlscore ( SCIP scip,
int *  nlcount,
int  nlcountmax,
int  probindex 
)
static

calculates nlscore value between 0 and 1

Parameters
scipSCIP data structure
nlcountarray to store count values
nlcountmaxmaximum value in nlcount array
probindexindex of branching candidate

Definition at line 282 of file branch_relpscost.c.

References calcScore(), NULL, SCIP_Real, and SCIPgetNVars().

Referenced by branchruledataEnsureNlcount(), and execRelpscost().

static SCIP_Real calcScore ( SCIP scip,
SCIP_BRANCHRULEDATA branchruledata,
SCIP_Real  conflictscore,
SCIP_Real  avgconflictscore,
SCIP_Real  conflengthscore,
SCIP_Real  avgconflengthscore,
SCIP_Real  inferencescore,
SCIP_Real  avginferencescore,
SCIP_Real  cutoffscore,
SCIP_Real  avgcutoffscore,
SCIP_Real  pscostscore,
SCIP_Real  avgpscostscore,
SCIP_Real  nlscore,
SCIP_Real  frac 
)
static

calculates an overall score value for the given individual score values

Parameters
scipSCIP data structure
branchruledatabranching rule data
conflictscoreconflict score of current variable
avgconflictscoreaverage conflict score
conflengthscoreconflict length score of current variable
avgconflengthscoreaverage conflict length score
inferencescoreinference score of current variable
avginferencescoreaverage inference score
cutoffscorecutoff score of current variable
avgcutoffscoreaverage cutoff score
pscostscorepscost score of current variable
avgpscostscoreaverage pscost score
nlscorenonlinear score of current variable between 0 and 1
fracfractional value of variable in current solution

Definition at line 309 of file branch_relpscost.c.

References addBdchg(), MIN, NULL, SCIP_Real, and SCIPfeastol().

Referenced by calcNlscore(), and execRelpscost().

static SCIP_RETCODE addBdchg ( SCIP scip,
int **  bdchginds,
SCIP_BOUNDTYPE **  bdchgtypes,
SCIP_Real **  bdchgbounds,
int *  nbdchgs,
int  ind,
SCIP_BOUNDTYPE  type,
SCIP_Real  bound 
)
static

adds given index and direction to bound change arrays

Parameters
scipSCIP data structure
bdchgindspointer to bound change index array
bdchgtypespointer to bound change types array
bdchgboundspointer to bound change new bounds array
nbdchgspointer to number of bound changes
indindex to store in bound change index array
typetype of the bound change to store in bound change type array
boundnew bound to store in bound change new bounds array

Definition at line 347 of file branch_relpscost.c.

References freeBdchgs(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPreallocBufferArray.

Referenced by calcScore(), and execRelpscost().

static void freeBdchgs ( SCIP scip,
int **  bdchginds,
SCIP_BOUNDTYPE **  bdchgtypes,
SCIP_Real **  bdchgbounds,
int *  nbdchgs 
)
static

frees bound change arrays

Parameters
scipSCIP data structure
bdchgindspointer to bound change index array
bdchgtypespointer to bound change types array
bdchgboundspointer to bound change new bounds array
nbdchgspointer to number of bound changes

Definition at line 380 of file branch_relpscost.c.

References applyBdchgs(), NULL, and SCIPfreeBufferArrayNull.

Referenced by addBdchg(), and execRelpscost().

static SCIP_RETCODE applyBdchgs ( SCIP scip,
SCIP_VAR **  vars,
int *  bdchginds,
SCIP_BOUNDTYPE bdchgtypes,
SCIP_Real bdchgbounds,
int  nbdchgs,
SCIP_RESULT result 
)
static

applies bound changes stored in bound change arrays

Parameters
scipSCIP data structure
varsproblem variables
bdchgindsbound change index array
bdchgtypesbound change types array
bdchgboundsbound change new bound array
nbdchgsnumber of bound changes
resultresult pointer

Definition at line 401 of file branch_relpscost.c.

References BRANCHRULE_NAME, execRelpscost(), NULL, SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_CUTOFF, SCIP_OKAY, SCIPbranchruleGetData(), SCIPdebugMessage, SCIPfindBranchrule(), SCIPtightenVarLb(), SCIPtightenVarUb(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and TRUE.

Referenced by execRelpscost(), and freeBdchgs().

static SCIP_RETCODE execRelpscost ( SCIP scip,
SCIP_BRANCHRULE branchrule,
SCIP_Bool  allowaddcons,
SCIP_VAR **  branchcands,
SCIP_Real branchcandssol,
SCIP_Real branchcandsfrac,
int  nbranchcands,
SCIP_Bool  executebranch,
SCIP_RESULT result 
)
static

execute reliability pseudo cost branching

Parameters
scipSCIP data structure
branchrulebranching rule
allowaddconsis the branching rule allowed to add constraints to the current node in order to cut off the current solution instead of creating a branching?
branchcandsbranching candidates
branchcandssolsolution value for the branching candidates
branchcandsfracfractional part of the branching candidates
nbranchcandsnumber of branching candidates
executebranchexecute a branching step or run probing only
resultpointer to the result of the execution

Definition at line 478 of file branch_relpscost.c.

References addBdchg(), applyBdchgs(), branchruledataEnsureNlcount(), calcNlscore(), calcScore(), FALSE, freeBdchgs(), MAX, MIN, NULL, SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_BRANCHDIR_DOWNWARDS, SCIP_BRANCHDIR_UPWARDS, SCIP_BRANCHED, SCIP_CALL, SCIP_CONFIDENCELEVEL_HIGH, SCIP_CONFIDENCELEVEL_LOW, SCIP_CONFIDENCELEVEL_MAX, SCIP_CONFIDENCELEVEL_MEDIUM, SCIP_CONFIDENCELEVEL_MIN, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DECL_BRANCHCOPY(), SCIP_DIDNOTRUN, SCIP_INVALID, SCIP_Longint, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_VERBLEVEL_HIGH, SCIPallColsInLP(), SCIPallocBufferArray, SCIPbranchruleGetData(), SCIPbranchVarVal(), SCIPdebugMessage, SCIPendStrongbranch(), SCIPfeasCeil(), SCIPfeasFloor(), SCIPfreeBufferArray, SCIPgetAvgConflictlengthScore(), SCIPgetAvgConflictScore(), SCIPgetAvgCutoffScore(), SCIPgetAvgInferenceScore(), SCIPgetAvgPseudocostScore(), SCIPgetBestSol(), SCIPgetBranchScore(), SCIPgetCurrentNode(), SCIPgetCutoffbound(), SCIPgetLPObjval(), SCIPgetLPSolstat(), SCIPgetNDualResolveLPIterations(), SCIPgetNDualResolveLPs(), SCIPgetNNodeInitLPIterations(), SCIPgetNNodeInitLPs(), SCIPgetNNodeLPIterations(), SCIPgetNNodes(), SCIPgetNodeLowerbound(), SCIPgetNRootStrongbranchLPIterations(), SCIPgetNStrongbranchLPIterations(), SCIPgetNVars(), SCIPgetRandomReal(), SCIPgetVarAvgCutoffScore(), SCIPgetVarAvgInferenceScore(), SCIPgetVarConflictlengthScore(), SCIPgetVarConflictScore(), SCIPgetVarPseudocostCountCurrentRun(), SCIPgetVarPseudocostCurrentRun(), SCIPgetVarPseudocostScore(), SCIPgetVarPseudocostScoreCurrentRun(), SCIPgetVars(), SCIPgetVarStrongbranchFrac(), SCIPgetVarStrongbranchLast(), SCIPgetVarStrongbranchNode(), SCIPgetVarStrongbranchWithPropagation(), SCIPhasCurrentNodeLP(), SCIPinfinity(), SCIPisExactSolve(), SCIPisFeasIntegral(), SCIPisGE(), SCIPisGT(), SCIPisLPSolBasic(), SCIPisLT(), SCIPisStopped(), SCIPisSumGE(), SCIPisSumGT(), SCIPisVarPscostRelerrorReliable(), SCIPnodeGetLowerbound(), SCIPpscostThresholdProbabilityTest(), SCIPsignificantVarPscostDifference(), SCIPsolGetIndex(), SCIPstartStrongbranch(), SCIPupdateNodeLowerbound(), SCIPupdateVarPseudocost(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetProbindex(), SCIPvarGetUbLocal(), SCIPverbMessage(), and TRUE.

Referenced by applyBdchgs(), and SCIPexecRelpscostBranching().

static SCIP_DECL_BRANCHCOPY ( branchCopyRelpscost  )
static

copy method for branchrule plugins (called when SCIP copies plugins)

Definition at line 1423 of file branch_relpscost.c.

Referenced by execRelpscost().

static SCIP_DECL_BRANCHFREE ( branchFreeRelpscost  )
static

destructor of branching rule to free user data (called when SCIP is exiting)

Definition at line 1437 of file branch_relpscost.c.

static SCIP_DECL_BRANCHINITSOL ( branchInitsolRelpscost  )
static

solving process initialization method of branching rule (called when branch and bound process is about to begin)

Definition at line 1452 of file branch_relpscost.c.

static SCIP_DECL_BRANCHEXITSOL ( branchExitsolRelpscost  )
static

solving process deinitialization method of branching rule (called before branch and bound process data is freed)

Definition at line 1470 of file branch_relpscost.c.

static SCIP_DECL_BRANCHEXECLP ( branchExeclpRelpscost  )
static

branching execution method for fractional LP solutions

Definition at line 1484 of file branch_relpscost.c.

SCIP_RETCODE SCIPexecRelpscostBranching ( SCIP scip,
SCIP_Bool  allowaddcons,
SCIP_VAR **  branchcands,
SCIP_Real branchcandssol,
SCIP_Real branchcandsfrac,
int  nbranchcands,
SCIP_Bool  executebranching,
SCIP_RESULT result 
)

execution reliability pseudo cost branching with the given branching candidates

Parameters
scipSCIP data structure
allowaddconsis the branching rule allowed to add constraints to the current node in order to cut off the current solution instead of creating a branching?
branchcandsbranching candidates
branchcandssolsolution value for the branching candidates
branchcandsfracfractional part of the branching candidates
nbranchcandsnumber of branching candidates
executebranchingperform a branching step after probing
resultpointer to the result of the execution

Definition at line 1667 of file branch_relpscost.c.

References BRANCHRULE_NAME, execRelpscost(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPfindBranchrule().

Referenced by SCIP_DECL_BRANCHEXECLP(), and SCIPincludeBranchruleRelpscost().