Detailed Description

reliable pseudo costs branching rule

Author: Tobias Achterberg; Timo Berthold; Gerald Gamrath

#include "blockmemshell/memory.h"
#include "scip/branch_relpscost.h"
#include "scip/cons_and.h"
#include "scip/pub_branch.h"
#include "scip/pub_cons.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_sol.h"
#include "scip/pub_tree.h"
#include "scip/pub_var.h"
#include "scip/scip_branch.h"
#include "scip/scip_cons.h"
#include "scip/scip_general.h"
#include "scip/scip_lp.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_nlp.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_prob.h"
#include "scip/scip_randnumgen.h"
#include "scip/scip_sol.h"
#include "scip/scip_solvingstats.h"
#include "scip/scip_tree.h"
#include "scip/scip_var.h"
#include <string.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 5

#define	DEFAULT_RANDINITORDER FALSE

#define	DEFAULT_USESMALLWEIGHTSITLIM FALSE

#define	DEFAULT_DYNAMICWEIGHTS TRUE

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_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_VAR branchcands, SCIP_Real branchcandssol, SCIP_Real branchcandsfrac, int nbranchcands, SCIP_Bool executebranching, SCIP_RESULT result)

Macro Definition Documentation

◆ BRANCHRULE_NAME

#define BRANCHRULE_NAME "relpscost"

Definition at line 52 of file branch_relpscost.c.

Referenced by applyBdchgs(), and SCIPexecRelpscostBranching().

◆ BRANCHRULE_DESC

#define BRANCHRULE_DESC "reliability branching on pseudo cost values"

Definition at line 53 of file branch_relpscost.c.

◆ BRANCHRULE_PRIORITY

#define BRANCHRULE_PRIORITY 10000

Definition at line 54 of file branch_relpscost.c.

◆ BRANCHRULE_MAXDEPTH

#define BRANCHRULE_MAXDEPTH -1

Definition at line 55 of file branch_relpscost.c.

◆ BRANCHRULE_MAXBOUNDDIST

#define BRANCHRULE_MAXBOUNDDIST 1.0

Definition at line 56 of file branch_relpscost.c.

◆ DEFAULT_CONFLICTWEIGHT

#define DEFAULT_CONFLICTWEIGHT 0.01

weight in score calculations for conflict score

Definition at line 58 of file branch_relpscost.c.

◆ DEFAULT_CONFLENGTHWEIGHT

#define DEFAULT_CONFLENGTHWEIGHT 0.0

weight in score calculations for conflict length score

Definition at line 59 of file branch_relpscost.c.

◆ DEFAULT_INFERENCEWEIGHT

#define DEFAULT_INFERENCEWEIGHT 0.0001

weight in score calculations for inference score

Definition at line 60 of file branch_relpscost.c.

◆ DEFAULT_CUTOFFWEIGHT

#define DEFAULT_CUTOFFWEIGHT 0.0001

weight in score calculations for cutoff score

Definition at line 61 of file branch_relpscost.c.

◆ DEFAULT_PSCOSTWEIGHT

#define DEFAULT_PSCOSTWEIGHT 1.0

weight in score calculations for pseudo cost score

Definition at line 62 of file branch_relpscost.c.

◆ DEFAULT_NLSCOREWEIGHT

#define DEFAULT_NLSCOREWEIGHT 0.1

weight in score calculations for nlcount score

Definition at line 63 of file branch_relpscost.c.

◆ DEFAULT_MINRELIABLE

#define DEFAULT_MINRELIABLE 1.0

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

Definition at line 64 of file branch_relpscost.c.

◆ DEFAULT_MAXRELIABLE

#define DEFAULT_MAXRELIABLE 5.0

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

Definition at line 65 of file branch_relpscost.c.

◆ DEFAULT_SBITERQUOT

#define DEFAULT_SBITERQUOT 0.5

maximal fraction of strong branching LP iterations compared to normal iterations

Definition at line 66 of file branch_relpscost.c.

◆ DEFAULT_SBITEROFS

#define DEFAULT_SBITEROFS 100000

additional number of allowed strong branching LP iterations

Definition at line 67 of file branch_relpscost.c.

◆ DEFAULT_MAXLOOKAHEAD

#define DEFAULT_MAXLOOKAHEAD 9

maximal number of further variables evaluated without better score

Definition at line 68 of file branch_relpscost.c.

◆ DEFAULT_INITCAND

#define DEFAULT_INITCAND 100

maximal number of candidates initialized with strong branching per node

Definition at line 69 of file branch_relpscost.c.

◆ DEFAULT_INITITER

#define DEFAULT_INITITER 0

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

Definition at line 70 of file branch_relpscost.c.

◆ DEFAULT_MAXBDCHGS

#define DEFAULT_MAXBDCHGS 5

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

Definition at line 71 of file branch_relpscost.c.

◆ DEFAULT_MAXPROPROUNDS

#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 72 of file branch_relpscost.c.

◆ DEFAULT_PROBINGBOUNDS

#define DEFAULT_PROBINGBOUNDS TRUE

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

Definition at line 75 of file branch_relpscost.c.

◆ DEFAULT_USERELERRORFORRELIABILITY

#define DEFAULT_USERELERRORFORRELIABILITY FALSE

should reliability be based on relative errors?

Definition at line 78 of file branch_relpscost.c.

◆ DEFAULT_LOWERRORTOL

#define DEFAULT_LOWERRORTOL 0.05

lowest tolerance beneath which relative errors are reliable

Definition at line 79 of file branch_relpscost.c.

◆ DEFAULT_HIGHERRORTOL

#define DEFAULT_HIGHERRORTOL 1.0

highest tolerance beneath which relative errors are reliable

Definition at line 80 of file branch_relpscost.c.

◆ DEFAULT_USEHYPTESTFORRELIABILITY

#define DEFAULT_USEHYPTESTFORRELIABILITY FALSE

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

Definition at line 81 of file branch_relpscost.c.

◆ DEFAULT_USEDYNAMICCONFIDENCE

#define DEFAULT_USEDYNAMICCONFIDENCE FALSE

should the confidence level be adjusted dynamically?

Definition at line 82 of file branch_relpscost.c.

◆ DEFAULT_STORESEMIINITCOSTS

#define DEFAULT_STORESEMIINITCOSTS FALSE

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

Definition at line 83 of file branch_relpscost.c.

◆ DEFAULT_USESBLOCALINFO

#define DEFAULT_USESBLOCALINFO FALSE

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

Definition at line 84 of file branch_relpscost.c.

◆ DEFAULT_CONFIDENCELEVEL

#define DEFAULT_CONFIDENCELEVEL 2

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

Definition at line 85 of file branch_relpscost.c.

◆ DEFAULT_SKIPBADINITCANDS

#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 86 of file branch_relpscost.c.

◆ DEFAULT_STARTRANDSEED

#define DEFAULT_STARTRANDSEED 5

start random seed for random number generation

Definition at line 89 of file branch_relpscost.c.

◆ DEFAULT_RANDINITORDER

#define DEFAULT_RANDINITORDER FALSE

should slight perturbation of scores be used to break ties in the prior scores?

Definition at line 90 of file branch_relpscost.c.

◆ DEFAULT_USESMALLWEIGHTSITLIM

#define DEFAULT_USESMALLWEIGHTSITLIM FALSE

should smaller weights be used for pseudo cost updates after hitting the LP iteration limit?

Definition at line 91 of file branch_relpscost.c.

◆ DEFAULT_DYNAMICWEIGHTS

#define DEFAULT_DYNAMICWEIGHTS TRUE

should the weights of the branching rule be adjusted dynamically during solving based infeasible and objective leaf counters?

Definition at line 92 of file branch_relpscost.c.

Function Documentation

◆ binvarGetActiveProbindex()

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

static

! [SnippetCodeStyleStaticAsserts] return probindex of variable or corresponding active variable (if negated or aggregated) or -1 (if multiaggregated)

! [SnippetCodeStyleStaticAsserts]

Parameters

scip	SCIP data structure
var	binary variable
probindex	buffer to store probindex

Definition at line 145 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().

◆ countNonlinearities()

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

static

! [SnippetCodeStyleDeclaration] counts number of nonlinear constraints in which each variable appears

! [SnippetCodeStyleDeclaration]

! [SnippetCodeStyleIfFor]

Parameters

scip	SCIP data structure
nlcount	pointer to array for storing count values
nlcountsize	buffer for storing length of nlcount array
nlcountmax	buffer for storing maximum value in nlcount array

Definition at line 183 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().

◆ branchruledataEnsureNlcount()

static SCIP_RETCODE branchruledataEnsureNlcount	(	SCIP *	scip,
		SCIP_BRANCHRULEDATA *	branchruledata
	)

static

Parameters

scip	SCIP data structure
branchruledata	branching rule data

Definition at line 273 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().

◆ calcNlscore()

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

static

calculates nlscore value between 0 and 1

Parameters

scip	SCIP data structure
nlcount	array to store count values
nlcountmax	maximum value in nlcount array
probindex	index of branching candidate

Definition at line 320 of file branch_relpscost.c.

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

Referenced by branchruledataEnsureNlcount(), and execRelpscost().

◆ calcScore()

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

scip	SCIP data structure
branchruledata	branching rule data
conflictscore	conflict score of current variable
avgconflictscore	average conflict score
conflengthscore	conflict length score of current variable
avgconflengthscore	average conflict length score
inferencescore	inference score of current variable
avginferencescore	average inference score
cutoffscore	cutoff score of current variable
avgcutoffscore	average cutoff score
pscostscore	pscost score of current variable
avgpscostscore	average pscost score
nlscore	nonlinear score of current variable between 0 and 1
frac	fractional value of variable in current solution

Definition at line 347 of file branch_relpscost.c.

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

Referenced by calcNlscore(), and execRelpscost().

◆ addBdchg()

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

scip	SCIP data structure
bdchginds	pointer to bound change index array
bdchgtypes	pointer to bound change types array
bdchgbounds	pointer to bound change new bounds array
nbdchgs	pointer to number of bound changes
ind	index to store in bound change index array
type	type of the bound change to store in bound change type array
bound	new bound to store in bound change new bounds array

Definition at line 393 of file branch_relpscost.c.

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

Referenced by calcScore(), and execRelpscost().

◆ freeBdchgs()

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

static

frees bound change arrays

Parameters

scip	SCIP data structure
bdchginds	pointer to bound change index array
bdchgtypes	pointer to bound change types array
bdchgbounds	pointer to bound change new bounds array
nbdchgs	pointer to number of bound changes

Definition at line 426 of file branch_relpscost.c.

References applyBdchgs(), NULL, and SCIPfreeBufferArrayNull.

Referenced by addBdchg(), and execRelpscost().

◆ applyBdchgs()

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

scip	SCIP data structure
vars	problem variables
bdchginds	bound change index array
bdchgtypes	bound change types array
bdchgbounds	bound change new bound array
nbdchgs	number of bound changes
result	result pointer

Definition at line 447 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(), SCIPdebugMsg, SCIPfindBranchrule(), SCIPtightenVarLb(), SCIPtightenVarUb(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and TRUE.

Referenced by execRelpscost(), and freeBdchgs().

◆ execRelpscost()

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

static

execute reliability pseudo cost branching

Parameters

scip	SCIP data structure
branchrule	branching rule
branchcands	branching candidates
branchcandssol	solution value for the branching candidates
branchcandsfrac	fractional part of the branching candidates
nbranchcands	number of branching candidates
executebranch	execute a branching step or run probing only
result	pointer to the result of the execution

Definition at line 524 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_LONGINT_FORMAT, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_VERBLEVEL_HIGH, SCIPallColsInLP(), SCIPallocBlockMemoryArray, SCIPallocBufferArray, SCIPbranchruleGetData(), SCIPbranchVarVal(), SCIPdebug, SCIPdebugMsg, SCIPendStrongbranch(), SCIPfeasCeil(), SCIPfeasFloor(), SCIPfreeBlockMemoryArray, SCIPfreeBufferArray, SCIPgetAvgConflictlengthScore(), SCIPgetAvgConflictScore(), SCIPgetAvgCutoffScore(), SCIPgetAvgInferenceScore(), SCIPgetAvgPseudocostScore(), SCIPgetBestSol(), SCIPgetBranchScore(), SCIPgetCurrentNode(), SCIPgetCutoffbound(), SCIPgetLastStrongbranchLPSolStat(), SCIPgetLPObjval(), SCIPgetLPSolstat(), SCIPgetNDualResolveLPIterations(), SCIPgetNDualResolveLPs(), SCIPgetNNodeInitLPIterations(), SCIPgetNNodeInitLPs(), SCIPgetNNodeLPIterations(), SCIPgetNNodes(), SCIPgetNodeLowerbound(), SCIPgetNRootStrongbranchLPIterations(), SCIPgetNStrongbranchLPIterations(), SCIPgetNVars(), 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(), SCIPrandomGetReal(), SCIPsignificantVarPscostDifference(), SCIPsolGetIndex(), SCIPstartStrongbranch(), SCIPupdateNodeLowerbound(), SCIPupdateVarPseudocost(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetProbindex(), SCIPvarGetUbLocal(), SCIPverbMessage(), and TRUE.

Referenced by applyBdchgs(), and SCIPexecRelpscostBranching().

◆ SCIP_DECL_BRANCHCOPY()

static SCIP_DECL_BRANCHCOPY ( branchCopyRelpscost )

static

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

Definition at line 1477 of file branch_relpscost.c.

Referenced by execRelpscost().

◆ SCIP_DECL_BRANCHFREE()

static SCIP_DECL_BRANCHFREE ( branchFreeRelpscost )

static

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

Definition at line 1491 of file branch_relpscost.c.

◆ SCIP_DECL_BRANCHINITSOL()

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 1506 of file branch_relpscost.c.

◆ SCIP_DECL_BRANCHEXITSOL()

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 1527 of file branch_relpscost.c.

◆ SCIP_DECL_BRANCHEXECLP()

static SCIP_DECL_BRANCHEXECLP ( branchExeclpRelpscost )

static

branching execution method for fractional LP solutions

Definition at line 1544 of file branch_relpscost.c.

SCIP

Detailed Description

Macros

Functions

Macro Definition Documentation

◆ BRANCHRULE_NAME

◆ BRANCHRULE_DESC

◆ BRANCHRULE_PRIORITY

◆ BRANCHRULE_MAXDEPTH

◆ BRANCHRULE_MAXBOUNDDIST

◆ DEFAULT_CONFLICTWEIGHT

◆ DEFAULT_CONFLENGTHWEIGHT

◆ DEFAULT_INFERENCEWEIGHT

◆ DEFAULT_CUTOFFWEIGHT

◆ DEFAULT_PSCOSTWEIGHT

◆ DEFAULT_NLSCOREWEIGHT

◆ DEFAULT_MINRELIABLE

◆ DEFAULT_MAXRELIABLE

◆ DEFAULT_SBITERQUOT

◆ DEFAULT_SBITEROFS

◆ DEFAULT_MAXLOOKAHEAD

◆ DEFAULT_INITCAND

◆ DEFAULT_INITITER

◆ DEFAULT_MAXBDCHGS

◆ DEFAULT_MAXPROPROUNDS

◆ DEFAULT_PROBINGBOUNDS

◆ DEFAULT_USERELERRORFORRELIABILITY

◆ DEFAULT_LOWERRORTOL

◆ DEFAULT_HIGHERRORTOL

◆ DEFAULT_USEHYPTESTFORRELIABILITY

◆ DEFAULT_USEDYNAMICCONFIDENCE

◆ DEFAULT_STORESEMIINITCOSTS

◆ DEFAULT_USESBLOCALINFO

◆ DEFAULT_CONFIDENCELEVEL

◆ DEFAULT_SKIPBADINITCANDS

◆ DEFAULT_STARTRANDSEED

◆ DEFAULT_RANDINITORDER

◆ DEFAULT_USESMALLWEIGHTSITLIM

◆ DEFAULT_DYNAMICWEIGHTS

Function Documentation

◆ binvarGetActiveProbindex()

◆ countNonlinearities()

◆ branchruledataEnsureNlcount()

◆ calcNlscore()

◆ calcScore()

◆ addBdchg()

◆ freeBdchgs()

◆ applyBdchgs()

◆ execRelpscost()

◆ SCIP_DECL_BRANCHCOPY()

◆ SCIP_DECL_BRANCHFREE()

◆ SCIP_DECL_BRANCHINITSOL()

◆ SCIP_DECL_BRANCHEXITSOL()

◆ SCIP_DECL_BRANCHEXECLP()