Detailed Description

internal methods for collecting primal CIP solutions and primal informations

Author: Tobias Achterberg

Definition in file primal.h.

#include "scip/def.h"
#include "blockmemshell/memory.h"
#include "scip/type_retcode.h"
#include "scip/type_set.h"
#include "scip/type_event.h"
#include "scip/type_lp.h"
#include "scip/type_var.h"
#include "scip/type_prob.h"
#include "scip/type_sol.h"
#include "scip/type_primal.h"
#include "scip/type_tree.h"
#include "scip/type_reopt.h"
#include "scip/type_heur.h"
#include "scip/struct_primal.h"

Go to the source code of this file.

Functions
SCIP_RETCODE	SCIPprimalCreate (SCIP_PRIMAL **primal)

SCIP_RETCODE	SCIPprimalFree (SCIP_PRIMAL *primal, BMS_BLKMEM blkmem)

SCIP_RETCODE	SCIPprimalClear (SCIP_PRIMAL *primal, BMS_BLKMEM blkmem)

SCIP_RETCODE	SCIPprimalSetCutoffbound (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP *lp, SCIP_Real cutoffbound, SCIP_Bool useforobjlimit)

SCIP_RETCODE	SCIPprimalSetUpperbound (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB prob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_Real upperbound)

SCIP_RETCODE	SCIPprimalUpdateObjlimit (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP *lp)

SCIP_RETCODE	SCIPprimalUpdateObjoffset (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP *lp)

void	SCIPprimalAddOrigObjoffset (SCIP_PRIMAL primal, SCIP_SET set, SCIP_Real addval)

SCIP_Bool	SCIPprimalUpperboundIsSol (SCIP_PRIMAL primal, SCIP_SET set, SCIP_PROB transprob, SCIP_PROB origprob)

SCIP_SOL *	SCIPprimalGetRay (SCIP_PRIMAL *primal)

SCIP_RETCODE	SCIPprimalUpdateRay (SCIP_PRIMAL primal, SCIP_SET set, SCIP_STAT stat, SCIP_SOL primalray, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPprimalAddSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL sol, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalAddSolFree (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL *sol, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalAddOrigSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PROB prob, SCIP_SOL sol, SCIP_Bool *stored)

SCIP_RETCODE	SCIPprimalAddOrigSolFree (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PROB prob, SCIP_SOL sol, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalAddCurrentSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_HEUR heur, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalTrySol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL sol, SCIP_Bool printreason, SCIP_Bool completely, SCIP_Bool checkbounds, SCIP_Bool checkintegrality, SCIP_Bool checklprows, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalTrySolFree (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL *sol, SCIP_Bool printreason, SCIP_Bool completely, SCIP_Bool checkbounds, SCIP_Bool checkintegrality, SCIP_Bool checklprows, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalTryCurrentSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_HEUR heur, SCIP_Bool printreason, SCIP_Bool completely, SCIP_Bool checkintegrality, SCIP_Bool checklprows, SCIP_Bool stored)

SCIP_RETCODE	SCIPprimalSolCreated (SCIP_PRIMAL primal, SCIP_SET set, SCIP_SOL *sol)

void	SCIPprimalSolFreed (SCIP_PRIMAL primal, SCIP_SOL sol)

void	SCIPprimalUpdateVarObj (SCIP_PRIMAL primal, SCIP_VAR var, SCIP_Real oldobj, SCIP_Real newobj)

SCIP_RETCODE	SCIPprimalRetransformSolutions (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP *lp)

SCIP_RETCODE	SCIPprimalTransformSol (SCIP_PRIMAL primal, SCIP_SOL sol, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_TREE tree, SCIP_REOPT reopt, SCIP_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_Real solvals, SCIP_Bool solvalset, int solvalssize, SCIP_Bool added)

SCIP_Bool	SCIPprimalUpdateViolations (SCIP_PRIMAL *primal)

void	SCIPprimalSetUpdateViolations (SCIP_PRIMAL *primal, SCIP_Bool updateviolations)

Function Documentation

◆ SCIPprimalCreate()

SCIP_RETCODE SCIPprimalCreate ( SCIP_PRIMAL ** primal )

creates primal data

Parameters

primal pointer to primal data

Definition at line 130 of file primal.c.

References BMSallocMemory, NULL, SCIP_ALLOC, SCIP_INVALID, SCIP_OKAY, and TRUE.

Referenced by copyProb(), SCIPcreateProb(), and SCIPtransformProb().

◆ SCIPprimalFree()

SCIP_RETCODE SCIPprimalFree	(	SCIP_PRIMAL **	primal,
		BMS_BLKMEM *	blkmem
	)

frees primal data

Parameters

primal	pointer to primal data
blkmem	block memory

Definition at line 160 of file primal.c.

References BMSfreeMemory, BMSfreeMemoryArrayNull, NULL, SCIP_CALL, SCIP_OKAY, and SCIPsolFree().

Referenced by freeTransform(), freeTransforming(), and SCIPfreeProb().

◆ SCIPprimalClear()

SCIP_RETCODE SCIPprimalClear	(	SCIP_PRIMAL **	primal,
		BMS_BLKMEM *	blkmem
	)

clears primal data

Parameters

primal	pointer to primal data
blkmem	block memory

Definition at line 203 of file primal.c.

References NULL, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIPsolFree(), and TRUE.

Referenced by freeReoptSolve().

◆ SCIPprimalSetCutoffbound()

SCIP_RETCODE SCIPprimalSetCutoffbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_Real	cutoffbound,
		SCIP_Bool	useforobjlimit
	)

sets the cutoff bound in primal data and in LP solver

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
transprob	transformed problem data
origprob	original problem data
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
cutoffbound	new cutoff bound
useforobjlimit	should the cutoff bound be used to update the objective limit, if better?

Definition at line 307 of file primal.c.

References SCIP_Primal::cutoffbound, NULL, primalSetCutoffbound(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPprobExternObjval(), SCIPprobGetObjlim(), SCIPprobSetObjlim(), SCIPsetDebugMsg, and SCIPsetInfinity().

Referenced by initSolve(), and SCIPupdateCutoffbound().

◆ SCIPprimalSetUpperbound()

SCIP_RETCODE SCIPprimalSetUpperbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	prob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_Real	upperbound
	)

sets upper bound in primal data and in LP solver

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
prob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
upperbound	new upper bound

Definition at line 416 of file primal.c.

References NULL, primalSetUpperbound(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPsetInfinity(), and SCIP_Primal::upperbound.

Referenced by primalAddSol(), and SCIPprimalRetransformSolutions().

◆ SCIPprimalUpdateObjlimit()

SCIP_RETCODE SCIPprimalUpdateObjlimit	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp
	)

updates upper bound and cutoff bound in primal data after a tightening of the problem's objective limit

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
transprob	transformed problem data
origprob	original problem data
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data

Definition at line 448 of file primal.c.

References MIN, NULL, primalSetCutoffbound(), primalSetUpperbound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPprobGetObjlim(), SCIPprobInternObjval(), and SCIPsetInfinity().

Referenced by initSolve(), presolve(), SCIPsetObjlimit(), and SCIPtransformProb().

◆ SCIPprimalUpdateObjoffset()

SCIP_RETCODE SCIPprimalUpdateObjoffset	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp
	)

recalculates upper bound and cutoff bound in primal data after a change of the problem's objective offset

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
transprob	tranformed problem data
origprob	original problem data
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data

Definition at line 488 of file primal.c.

References MIN, SCIP_Primal::nsols, NULL, primalSetCutoffbound(), primalSetUpperbound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_STAGE_PRESOLVED, SCIPprobGetObjlim(), SCIPprobInternObjval(), SCIPsetGetStage(), SCIPsetInfinity(), SCIPsolGetObj(), SCIPsolIsOriginal(), SCIP_Primal::sols, and sortPrimalSols().

Referenced by SCIPaddObjoffset(), SCIPprobCheckObjIntegral(), SCIPprobScaleObj(), and SCIPvarAddObj().

◆ SCIPprimalAddOrigObjoffset()

void SCIPprimalAddOrigObjoffset	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_Real	addval
	)

adds additional objective offset in origanal space to all existing solution (in original space)

adds additional objective offset in original space to all existing solution (in original space)

Parameters

primal	primal data
set	global SCIP settings
addval	additional objective offset in original space

Definition at line 544 of file primal.c.

References SCIP_Primal::existingsols, SCIP_Primal::nexistingsols, SCIP_Primal::nsols, NULL, SCIP_SOLORIGIN_ORIGINAL, SCIP_STAGE_PROBLEM, SCIPsetGetStage(), SCIPsetIsLE(), SCIPsolGetOrigin(), SCIPsolGetOrigObj(), SCIPsolOrigAddObjval(), and SCIP_Primal::sols.

Referenced by SCIPaddOrigObjoffset().

◆ SCIPprimalUpperboundIsSol()

SCIP_Bool SCIPprimalUpperboundIsSol	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob
	)

returns whether the current primal bound is justified with a feasible primal solution; if not, the primal bound was set from the user as objective limit

Parameters

primal	primal data
set	global SCIP settings
transprob	tranformed problem data
origprob	original problem data

Definition at line 578 of file primal.c.

References SCIP_Primal::nsols, NULL, SCIPsetIsEQ(), SCIPsolGetObj(), SCIP_Primal::sols, and SCIP_Primal::upperbound.

Referenced by SCIPisPrimalboundSol().

◆ SCIPprimalGetRay()

SCIP_SOL* SCIPprimalGetRay ( SCIP_PRIMAL * primal )

returns the primal ray thats proves unboundedness

Parameters

primal primal data

Definition at line 591 of file primal.c.

References NULL, and SCIP_Primal::primalray.

◆ SCIPprimalUpdateRay()

SCIP_RETCODE SCIPprimalUpdateRay	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_SOL *	primalray,
		BMS_BLKMEM *	blkmem
	)

update the primal ray thats proves unboundedness

Parameters

primal	primal data
set	global SCIP settings
stat	dynamic SCIP statistics
primalray	the new primal ray
blkmem	block memory

Definition at line 601 of file primal.c.

References NULL, SCIP_Primal::primalray, SCIP_CALL, SCIP_OKAY, SCIPsolCopy(), and SCIPsolFree().

Referenced by SCIPupdatePrimalRay().

◆ SCIPprimalAddSol()

SCIP_RETCODE SCIPprimalAddSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL *	sol,
		SCIP_Bool *	stored
	)

adds primal solution to solution storage by copying it

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
sol	primal CIP solution
stored	stores whether given solution was good enough to keep

Definition at line 1208 of file primal.c.

References FALSE, SCIP_Primal::nsols, NULL, primalAddSol(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPsetIsLE(), SCIPsolCopy(), SCIPsolGetObj(), SCIPsolIsPartial(), solOfInterest(), SCIP_Primal::sols, and TRUE.

Referenced by SCIPaddSol(), SCIPprimalAddCurrentSol(), SCIPtransformProb(), and SCIPtrySol().

◆ SCIPprimalAddSolFree()

SCIP_RETCODE SCIPprimalAddSolFree	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL **	sol,
		SCIP_Bool *	stored
	)

adds primal solution to solution storage, frees the solution afterwards

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
sol	pointer to primal CIP solution; is cleared in function call
stored	stores whether given solution was good enough to keep

Definition at line 1276 of file primal.c.

References FALSE, NULL, primalAddSol(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPsolFree(), solOfInterest(), and TRUE.

Referenced by addCurrentSolution(), SCIPaddSolFree(), and SCIPtrySolFree().

◆ SCIPprimalAddOrigSol()

SCIP_RETCODE SCIPprimalAddOrigSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	prob,
		SCIP_SOL *	sol,
		SCIP_Bool *	stored
	)

adds primal solution to solution candidate storage of original problem space

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
prob	original problem data
sol	primal CIP solution; is cleared in function call
stored	stores whether given solution was good enough to keep

Definition at line 1331 of file primal.c.

References FALSE, NULL, origsolOfInterest(), primalAddOrigPartialSol(), primalAddOrigSol(), SCIP_CALL, SCIP_OKAY, SCIPsolCopy(), SCIPsolIsOriginal(), SCIPsolIsPartial(), and TRUE.

Referenced by freeTransform(), and SCIPaddSol().

◆ SCIPprimalAddOrigSolFree()

SCIP_RETCODE SCIPprimalAddOrigSolFree	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	prob,
		SCIP_SOL **	sol,
		SCIP_Bool *	stored
	)

adds primal solution to solution candidate storage of original problem space, frees the solution afterwards

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
prob	original problem data
sol	pointer to primal CIP solution; is cleared in function call
stored	stores whether given solution was good enough to keep

Definition at line 1386 of file primal.c.

References FALSE, NULL, origsolOfInterest(), primalAddOrigPartialSol(), primalAddOrigSol(), SCIP_CALL, SCIP_OKAY, SCIPsolFree(), SCIPsolIsOriginal(), SCIPsolIsPartial(), and TRUE.

Referenced by SCIPaddSolFree().

◆ SCIPprimalAddCurrentSol()

SCIP_RETCODE SCIPprimalAddCurrentSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_HEUR *	heur,
		SCIP_Bool *	stored
	)

adds current LP/pseudo solution to solution storage

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
heur	heuristic that found the solution (or NULL if it's from the tree)
stored	stores whether given solution was good enough to keep

Definition at line 1470 of file primal.c.

References SCIP_Primal::currentsol, NULL, primalLinkCurrentSol(), SCIP_CALL, SCIP_OKAY, and SCIPprimalAddSol().

Referenced by SCIPaddCurrentSol().

◆ SCIPprimalTrySol()

SCIP_RETCODE SCIPprimalTrySol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL *	sol,
		SCIP_Bool	printreason,
		SCIP_Bool	completely,
		SCIP_Bool	checkbounds,
		SCIP_Bool	checkintegrality,
		SCIP_Bool	checklprows,
		SCIP_Bool *	stored
	)

checks primal solution; if feasible, adds it to storage by copying it

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
sol	primal CIP solution
printreason	Should all reasons of violations be printed?
completely	Should all violations be checked?
checkbounds	Should the bounds of the variables be checked?
checkintegrality	Has integrality to be checked?
checklprows	Do constraints represented by rows in the current LP have to be checked?
stored	stores whether given solution was feasible and good enough to keep

Definition at line 1500 of file primal.c.

References FALSE, NULL, primalAddSol(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPsolCheck(), SCIPsolCopy(), solOfInterest(), and TRUE.

Referenced by SCIPprimalTryCurrentSol(), SCIPtrySol(), solveNode(), and solveNodeLP().

◆ SCIPprimalTrySolFree()

SCIP_RETCODE SCIPprimalTrySolFree	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL **	sol,
		SCIP_Bool	printreason,
		SCIP_Bool	completely,
		SCIP_Bool	checkbounds,
		SCIP_Bool	checkintegrality,
		SCIP_Bool	checklprows,
		SCIP_Bool *	stored
	)

checks primal solution; if feasible, adds it to storage; solution is freed afterwards

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
sol	pointer to primal CIP solution; is cleared in function call
printreason	Should all the reasons of violations be printed?
completely	Should all violations be checked?
checkbounds	Should the bounds of the variables be checked?
checkintegrality	Has integrality to be checked?
checklprows	Do constraints represented by rows in the current LP have to be checked?
stored	stores whether solution was feasible and good enough to keep

Definition at line 1570 of file primal.c.

References FALSE, NULL, primalAddSol(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPsolCheck(), SCIPsolFree(), solOfInterest(), and TRUE.

Referenced by addCurrentSolution(), SCIPprimalTransformSol(), SCIPtrySolFree(), solveNode(), and solveNodeLP().

◆ SCIPprimalTryCurrentSol()

SCIP_RETCODE SCIPprimalTryCurrentSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_HEUR *	heur,
		SCIP_Bool	printreason,
		SCIP_Bool	completely,
		SCIP_Bool	checkintegrality,
		SCIP_Bool	checklprows,
		SCIP_Bool *	stored
	)

checks current LP/pseudo solution; if feasible, adds it to storage

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
heur	heuristic that found the solution (or NULL if it's from the tree)
printreason	Should all reasons of violations be printed?
completely	Should all violations be checked?
checkintegrality	Has integrality to be checked?
checklprows	Do constraints represented by rows in the current LP have to be checked?
stored	stores whether given solution was good enough to keep

Definition at line 1644 of file primal.c.

References SCIP_Primal::currentsol, FALSE, NULL, primalLinkCurrentSol(), SCIP_CALL, SCIP_OKAY, and SCIPprimalTrySol().

Referenced by SCIPtryCurrentSol().

◆ SCIPprimalSolCreated()

SCIP_RETCODE SCIPprimalSolCreated	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_SOL *	sol
	)

inserts solution into the global array of all existing primal solutions

Parameters

primal	primal data
set	global SCIP settings
sol	primal CIP solution

Definition at line 1679 of file primal.c.

References ensureExistingsolsSize(), SCIP_Primal::existingsols, SCIP_Primal::nexistingsols, NULL, SCIP_CALL, SCIP_OKAY, SCIPsolGetPrimalIndex(), and SCIPsolSetPrimalIndex().

Referenced by SCIPsolCopy(), SCIPsolCreate(), SCIPsolCreateOriginal(), SCIPsolCreatePartial(), and SCIPsolCreateUnknown().

◆ SCIPprimalSolFreed()

void SCIPprimalSolFreed	(	SCIP_PRIMAL *	primal,
		SCIP_SOL *	sol
	)

removes solution from the global array of all existing primal solutions

Parameters

primal	primal data
sol	primal CIP solution

Definition at line 1701 of file primal.c.

References SCIP_Primal::existingsols, SCIP_Primal::nexistingsols, NULL, SCIPsolGetPrimalIndex(), and SCIPsolSetPrimalIndex().

Referenced by SCIPsolFree().

◆ SCIPprimalUpdateVarObj()

void SCIPprimalUpdateVarObj	(	SCIP_PRIMAL *	primal,
		SCIP_VAR *	var,
		SCIP_Real	oldobj,
		SCIP_Real	newobj
	)

updates all existing primal solutions after a change in a variable's objective value

Parameters

primal	primal data
var	problem variable
oldobj	old objective value
newobj	new objective value

Definition at line 1731 of file primal.c.

References SCIP_Primal::existingsols, SCIP_Primal::nexistingsols, NULL, SCIPsolIsOriginal(), and SCIPsolUpdateVarObj().

Referenced by SCIPeventProcess().

◆ SCIPprimalRetransformSolutions()

SCIP_RETCODE SCIPprimalRetransformSolutions	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp
	)

retransforms all existing solutions to original problem space

Note: as a side effect, the objective value of the solutions can change (numerical errors) so we update the objective cutoff value and upper bound accordingly

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
origprob	original problem
transprob	transformed problem
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data

Definition at line 1754 of file primal.c.

References SCIP_Primal::nsols, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_SOLORIGIN_ZERO, SCIPprimalSetUpperbound(), SCIPsolGetObj(), SCIPsolGetOrigin(), SCIPsolRetransform(), SCIP_Primal::sols, and sortPrimalSols().

Referenced by initPresolve().

◆ SCIPprimalTransformSol()

SCIP_RETCODE SCIPprimalTransformSol	(	SCIP_PRIMAL *	primal,
		SCIP_SOL *	sol,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_TREE *	tree,
		SCIP_REOPT *	reopt,
		SCIP_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_Real *	solvals,
		SCIP_Bool *	solvalset,
		int	solvalssize,
		SCIP_Bool *	added
	)

tries to transform original solution to the transformed problem space

Parameters

primal	primal data
sol	primal solution
blkmem	block memory
set	global SCIP settings
messagehdlr	message handler
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
tree	branch and bound tree
reopt	reoptimization data structure
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
solvals	array for internal use to store solution values, or NULL; if the method is called multiple times in a row, an array with size >= number of active variables should be given for performance reasons
solvalset	array for internal use to store which solution values were set, or NULL; if the method is called multiple times in a row, an array with size >= number of active variables should be given for performance reasons
solvalssize	size of solvals and solvalset arrays, should be >= number of active variables
added	pointer to store whether the solution was added

Definition at line 1803 of file primal.c.

References BMSclearMemoryArray, FALSE, NULL, SCIP_Prob::nvars, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_FIXED, SCIP_VARSTATUS_MULTAGGR, SCIPprimalTrySolFree(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsolCreate(), SCIPsolGetHeur(), SCIPsolGetOrigObj(), SCIPsolGetVal(), SCIPsolIsOriginal(), SCIPsolSetVal(), SCIPvarGetName(), SCIPvarGetProbindex(), SCIPvarGetProbvarSum(), SCIPvarGetStatus(), SCIPvarIsActive(), TRUE, and SCIP_Prob::vars.

Referenced by primalAddSol(), and transformSols().

◆ SCIPprimalUpdateViolations()

SCIP_Bool SCIPprimalUpdateViolations ( SCIP_PRIMAL * primal )

is the updating of violations enabled for this problem?

Parameters

primal problem data

Definition at line 1978 of file primal.c.

References NULL, and SCIP_Primal::updateviolations.

Referenced by SCIPsolCheckOrig(), SCIPupdateSolBoundViolation(), SCIPupdateSolConsViolation(), SCIPupdateSolIntegralityViolation(), SCIPupdateSolLPConsViolation(), and SCIPupdateSolLPRowViolation().

◆ SCIPprimalSetUpdateViolations()

void SCIPprimalSetUpdateViolations	(	SCIP_PRIMAL *	primal,
		SCIP_Bool	updateviolations
	)

set whether the updating of violations is turned on

Parameters

primal	problem data
updateviolations	marks whether the updating of violations is turned on

Definition at line 1988 of file primal.c.

References NULL, and SCIP_Primal::updateviolations.

Referenced by SCIPactivateSolViolationUpdates(), and SCIPdeactivateSolViolationUpdates().

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIPprimalCreate()

◆ SCIPprimalFree()

◆ SCIPprimalClear()

◆ SCIPprimalSetCutoffbound()

◆ SCIPprimalSetUpperbound()

◆ SCIPprimalUpdateObjlimit()

◆ SCIPprimalUpdateObjoffset()

◆ SCIPprimalAddOrigObjoffset()

◆ SCIPprimalUpperboundIsSol()

◆ SCIPprimalGetRay()

◆ SCIPprimalUpdateRay()

◆ SCIPprimalAddSol()

◆ SCIPprimalAddSolFree()

◆ SCIPprimalAddOrigSol()

◆ SCIPprimalAddOrigSolFree()

◆ SCIPprimalAddCurrentSol()

◆ SCIPprimalTrySol()

◆ SCIPprimalTrySolFree()

◆ SCIPprimalTryCurrentSol()

◆ SCIPprimalSolCreated()

◆ SCIPprimalSolFreed()

◆ SCIPprimalUpdateVarObj()

◆ SCIPprimalRetransformSolutions()

◆ SCIPprimalTransformSol()

◆ SCIPprimalUpdateViolations()

◆ SCIPprimalSetUpdateViolations()