Detailed Description

methods for collecting primal CIP solutions and primal informations

Author: Tobias Achterberg

Definition in file primal.c.

#include <assert.h>
#include "scip/def.h"
#include "scip/set.h"
#include "scip/stat.h"
#include "scip/vbc.h"
#include "scip/event.h"
#include "scip/lp.h"
#include "scip/var.h"
#include "scip/prob.h"
#include "scip/sol.h"
#include "scip/primal.h"
#include "scip/tree.h"
#include "scip/disp.h"
#include "scip/pub_message.h"

Go to the source code of this file.

Functions
static SCIP_RETCODE	ensureSolsSize (SCIP_PRIMAL primal, SCIP_SET set, int num)

static SCIP_RETCODE	ensureExistingsolsSize (SCIP_PRIMAL primal, SCIP_SET set, int num)

SCIP_RETCODE	SCIPprimalCreate (SCIP_PRIMAL **primal)

SCIP_RETCODE	SCIPprimalFree (SCIP_PRIMAL *primal, BMS_BLKMEM blkmem)

static SCIP_RETCODE	primalSetCutoffbound (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PROB prob, SCIP_EVENTQUEUE eventqueue, SCIP_TREE tree, SCIP_LP lp, SCIP_Real cutoffbound)

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

static SCIP_RETCODE	primalSetUpperbound (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTQUEUE eventqueue, SCIP_PROB prob, SCIP_TREE tree, SCIP_LP lp, SCIP_Real upperbound)

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

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

SCIP_RETCODE	SCIPprimalUpdateObjoffset (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTQUEUE eventqueue, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_TREE tree, 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)

static SCIP_RETCODE	primalAddSol (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_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL *solptr, int insertpos, SCIP_Bool replace)

static SCIP_RETCODE	primalAddOrigSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_PROB prob, SCIP_SOL *sol, int insertpos)

static int	primalSearchSolPos (SCIP_PRIMAL primal, SCIP_SET set, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_SOL *sol)

static int	primalSearchOrigSolPos (SCIP_PRIMAL primal, SCIP_SOL sol)

static SCIP_Bool	primalExistsSol (SCIP_PRIMAL primal, SCIP_SET set, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_SOL sol, int insertpos, SCIP_Bool replace)

static SCIP_Bool	primalExistsOrigSol (SCIP_PRIMAL primal, SCIP_SET set, SCIP_STAT stat, SCIP_PROB prob, SCIP_SOL *sol, int insertpos)

static SCIP_Bool	solOfInterest (SCIP_PRIMAL primal, SCIP_SET set, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB transprob, SCIP_SOL sol, int insertpos, SCIP_Bool replace)

static SCIP_Bool	origsolOfInterest (SCIP_PRIMAL primal, SCIP_SET set, SCIP_STAT stat, SCIP_PROB origprob, SCIP_SOL sol, int insertpos)

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_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_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)

static SCIP_RETCODE	primalLinkCurrentSol (SCIP_PRIMAL primal, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PROB prob, SCIP_TREE tree, SCIP_LP lp, SCIP_HEUR heur)

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_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_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL sol, SCIP_Bool printreason, 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_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_SOL sol, SCIP_Bool printreason, 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_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_HEUR heur, SCIP_Bool printreason, 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, SCIP_SET set, SCIP_STAT stat, SCIP_PROB origprob, SCIP_PROB *transprob)

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_LP lp, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_Real solvals, SCIP_Bool solvalset, int solvalssize, SCIP_Bool *added)

Function Documentation

static SCIP_RETCODE ensureSolsSize	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		int	num
	)

static

ensures, that sols array can store at least num entries

Parameters

primal	primal data
set	global SCIP settings
num	minimum number of entries to store

Definition at line 47 of file primal.c.

References BMSreallocMemoryArray, SCIP_Primal::nsols, SCIP_ALLOC, SCIP_OKAY, SCIPsetCalcMemGrowSize(), SCIP_Primal::sols, and SCIP_Primal::solssize.

Referenced by primalAddOrigSol(), and primalAddSol().

static SCIP_RETCODE ensureExistingsolsSize	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		int	num
	)

static

ensures, that existingsols array can store at least num entries

Parameters

primal	primal data
set	global SCIP settings
num	minimum number of entries to store

Definition at line 70 of file primal.c.

References BMSreallocMemoryArray, SCIP_Primal::existingsols, SCIP_Primal::existingsolssize, SCIP_Primal::nexistingsols, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().

Referenced by SCIPprimalSolCreated().

SCIP_RETCODE SCIPprimalCreate ( SCIP_PRIMAL ** primal )

creates primal data

Parameters

primal pointer to primal data

Definition at line 92 of file primal.c.

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

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

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

frees primal data

Parameters

primal	pointer to primal data
blkmem	block memory

Definition at line 118 of file primal.c.

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

Referenced by freeTransform(), and SCIPfreeProb().

static SCIP_RETCODE primalSetCutoffbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	prob,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_TREE *	tree,
		SCIP_LP *	lp,
		SCIP_Real	cutoffbound
	)

static

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
prob	problem data
eventqueue	event queue
tree	branch and bound tree
lp	current LP data
cutoffbound	new cutoff bound

Definition at line 156 of file primal.c.

References SCIP_Primal::cutoffbound, MIN, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpSetCutoffbound(), SCIPsetInfinity(), SCIPsetIsLE(), SCIPtreeCutoff(), SCIPtreeInRepropagation(), and SCIP_Primal::upperbound.

Referenced by primalSetUpperbound(), SCIPprimalSetCutoffbound(), SCIPprimalUpdateObjlimit(), and SCIPprimalUpdateObjoffset().

SCIP_RETCODE SCIPprimalSetCutoffbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		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
eventqueue	event queue
transprob	tranformed problem data
origprob	original problem data
tree	branch and bound tree
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 187 of file primal.c.

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

Referenced by initSolve(), and SCIPupdateCutoffbound().

static SCIP_RETCODE primalSetUpperbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	prob,
		SCIP_TREE *	tree,
		SCIP_LP *	lp,
		SCIP_Real	upperbound
	)

static

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
eventqueue	event queue
prob	transformed problem after presolve
tree	branch and bound tree
lp	current LP data
upperbound	new upper bound

Definition at line 237 of file primal.c.

References MIN, SCIP_Stat::nnodes, NULL, primalSetCutoffbound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPprobIsObjIntegral(), SCIPsetCutoffbounddelta(), SCIPsetFeasCeil(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPtreeGetCurrentDepth(), SCIPvbcUpperbound(), SCIP_Primal::upperbound, and SCIP_Stat::vbc.

Referenced by SCIPprimalSetUpperbound(), SCIPprimalUpdateObjlimit(), and SCIPprimalUpdateObjoffset().

SCIP_RETCODE SCIPprimalSetUpperbound	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	prob,
		SCIP_TREE *	tree,
		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
eventqueue	event queue
prob	transformed problem after presolve
tree	branch and bound tree
lp	current LP data
upperbound	new upper bound

Definition at line 290 of file primal.c.

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

Referenced by primalAddSol().

SCIP_RETCODE SCIPprimalUpdateObjlimit	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		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
eventqueue	event queue
transprob	tranformed problem data
origprob	original problem data
tree	branch and bound tree
lp	current LP data

Definition at line 320 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().

SCIP_RETCODE SCIPprimalUpdateObjoffset	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		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
eventqueue	event queue
transprob	tranformed problem data
origprob	original problem data
tree	branch and bound tree
lp	current LP data

Definition at line 358 of file primal.c.

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

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

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

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 423 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().

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 457 of file primal.c.

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

Referenced by SCIPisPrimalboundSol().

static SCIP_RETCODE primalAddSol	(	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_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL **	solptr,
		int	insertpos,
		SCIP_Bool	replace
	)

static

adds primal solution to solution storage at given position

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
lp	current LP data
eventqueue	event queue
eventfilter	event filter for global (not variable dependent) events
solptr	pointer to primal CIP solution
insertpos	position in solution storage to add solution to
replace	should the solution at insertpos be replaced by the new solution?

Definition at line 471 of file primal.c.

References SCIP_Stat::bestsolnode, ensureSolsSize(), FALSE, SCIP_Stat::firstprimalbound, SCIP_Stat::firstprimaldepth, SCIP_Stat::firstprimalheur, SCIP_Stat::firstprimaltime, MIN, SCIP_Primal::nbestsolsfound, SCIP_Primal::nlimsolsfound, SCIP_Stat::nnodes, SCIP_Stat::nnodesbeforefirst, SCIP_Stat::nrunsbeforefirst, SCIP_Primal::nsols, SCIP_Primal::nsolsfound, NULL, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_BESTSOLFOUND, SCIP_EVENTTYPE_POORSOLFOUND, SCIP_OKAY, SCIP_Real, SCIP_STAGE_SOLVING, SCIPdebug, SCIPdebugMessage, SCIPdispPrintLine(), SCIPerrorMessage, SCIPeventChgSol(), SCIPeventChgType(), SCIPeventProcess(), SCIPprimalSetUpperbound(), SCIPprimalTransformSol(), SCIPprobExternObjval(), SCIPprobGetObjlim(), SCIPprobInternObjval(), SCIPsetGetStage(), SCIPsetIsFeasLE(), SCIPsolCheck(), SCIPsolFree(), SCIPsolGetDepth(), SCIPsolGetHeur(), SCIPsolGetNodenum(), SCIPsolGetObj(), SCIPsolGetRunnum(), SCIPsolGetTime(), SCIPsolIsOriginal(), SCIPsolPrint(), SCIPsolTransform(), SCIPsolUnlink(), SCIPsolUpdateVarsum(), SCIPtreeGetCurrentNode(), SCIPtreeInRepropagation(), SCIPvbcFoundSolution(), SCIP_Primal::sols, TRUE, and SCIP_Stat::vbc.

Referenced by SCIPprimalAddSol(), SCIPprimalAddSolFree(), SCIPprimalTrySol(), and SCIPprimalTrySolFree().

static SCIP_RETCODE primalAddOrigSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_PROB *	prob,
		SCIP_SOL *	sol,
		int	insertpos
	)

static

adds primal solution to solution storage at given position

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
prob	original problem data
sol	primal CIP solution
insertpos	position in solution storage to add solution to

Definition at line 654 of file primal.c.

References ensureSolsSize(), MIN, SCIP_Primal::nlimsolsfound, SCIP_Primal::nsols, SCIP_Primal::nsolsfound, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPprobGetObjlim(), SCIPsetIsFeasLE(), SCIPsolFree(), SCIPsolGetOrigObj(), and SCIP_Primal::sols.

Referenced by SCIPprimalAddOrigSol(), and SCIPprimalAddOrigSolFree().

static int primalSearchSolPos	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_SOL *	sol
	)

static

uses binary search to find position in solution storage

Parameters

primal	primal data
set	global SCIP settings
transprob	tranformed problem data
origprob	original problem data
sol	primal solution to search position for

Definition at line 705 of file primal.c.

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

Referenced by solOfInterest().

static int primalSearchOrigSolPos	(	SCIP_PRIMAL *	primal,
		SCIP_SOL *	sol
	)

static

uses binary search to find position in solution storage

Parameters

primal	primal data
sol	primal solution to search position for

Definition at line 755 of file primal.c.

References SCIP_Primal::nsols, NULL, SCIP_Real, SCIPsolGetOrigObj(), and SCIP_Primal::sols.

Referenced by origsolOfInterest().

static SCIP_Bool primalExistsSol	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_SOL *	sol,
		int *	insertpos,
		SCIP_Bool *	replace
	)

static

returns whether the given primal solution is already existent in the solution storage

Parameters

primal	primal data
set	global SCIP settings
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
sol	primal solution to search position for
insertpos	pointer to insertion position returned by primalSearchSolPos(); the position might be changed if an existing solution should be replaced
replace	pointer to store whether the solution at insertpos should be replaced

Definition at line 790 of file primal.c.

References FALSE, SCIP_Primal::nsols, NULL, REALABS, SCIP_Real, SCIPsetEpsilon(), SCIPsetIsFeasGE(), SCIPsetIsFeasLE(), SCIPsetIsGE(), SCIPsetIsGT(), SCIPsetIsLE(), SCIPsetIsLT(), SCIPsolGetObj(), SCIPsolIsOriginal(), SCIPsolsAreEqual(), SCIP_Primal::sols, and TRUE.

Referenced by solOfInterest().

static SCIP_Bool primalExistsOrigSol	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	prob,
		SCIP_SOL *	sol,
		int	insertpos
	)

static

returns whether the given primal solution is already existent in the original solution candidate storage

Parameters

primal	primal data
set	global SCIP settings
stat	problem statistics data
prob	original problem
sol	primal solution to search position for
insertpos	insertion position returned by primalSearchOrigSolPos()

Definition at line 872 of file primal.c.

References FALSE, SCIP_Primal::nsols, NULL, SCIP_Real, SCIPsetIsGE(), SCIPsetIsGT(), SCIPsetIsLE(), SCIPsetIsLT(), SCIPsolGetOrigObj(), SCIPsolsAreEqual(), SCIP_Primal::sols, and TRUE.

Referenced by origsolOfInterest().

static SCIP_Bool solOfInterest	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob,
		SCIP_SOL *	sol,
		int *	insertpos,
		SCIP_Bool *	replace
	)

static

check if we are willing to check the solution for feasibility

Parameters

primal	primal data
set	global SCIP settings
stat	problem statistics data
origprob	original problem
transprob	transformed problem after presolve
sol	primal CIP solution
insertpos	pointer to store the insert position of that solution
replace	pointer to store whether the solution at insertpos should be replaced (e.g., because it lives in the original space)

Definition at line 924 of file primal.c.

References FALSE, primalExistsSol(), primalSearchSolPos(), SCIP_Real, SCIPsetIsInfinity(), SCIPsolGetObj(), and TRUE.

Referenced by SCIPprimalAddSol(), SCIPprimalAddSolFree(), SCIPprimalTrySol(), and SCIPprimalTrySolFree().

static SCIP_Bool origsolOfInterest	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_SOL *	sol,
		int *	insertpos
	)

static

check if we are willing to store the solution candidate for later checking

Parameters

primal	primal data
set	global SCIP settings
stat	problem statistics data
origprob	original problem
sol	primal CIP solution
insertpos	pointer to store the insert position of that solution

Definition at line 962 of file primal.c.

References FALSE, primalExistsOrigSol(), primalSearchOrigSolPos(), SCIPsolIsOriginal(), and TRUE.

Referenced by SCIPprimalAddOrigSol(), and SCIPprimalAddOrigSolFree().

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_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
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 983 of file primal.c.

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

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

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_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
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 1040 of file primal.c.

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

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

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 1094 of file primal.c.

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

Referenced by freeTransform(), and SCIPaddSol().

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 1134 of file primal.c.

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

Referenced by SCIPaddSolFree().

static SCIP_RETCODE primalLinkCurrentSol	(	SCIP_PRIMAL *	primal,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	prob,
		SCIP_TREE *	tree,
		SCIP_LP *	lp,
		SCIP_HEUR *	heur
	)

static

links temporary solution of primal data to current solution

Parameters

primal	primal data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
prob	transformed problem data
tree	branch and bound tree
lp	current LP data
heur	heuristic that found the solution (or NULL if it's from the tree)

Definition at line 1180 of file primal.c.

References SCIP_Primal::currentsol, NULL, SCIP_CALL, SCIP_OKAY, SCIPsolCreateCurrentSol(), SCIPsolLinkCurrentSol(), and SCIPsolSetHeur().

Referenced by SCIPprimalAddCurrentSol(), and SCIPprimalTryCurrentSol().

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_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
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 1207 of file primal.c.

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

Referenced by SCIPaddCurrentSol().

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_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL *	sol,
		SCIP_Bool	printreason,
		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
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?
checkbounds	should the bounds of the variables be checked?
checkintegrality	has integrality to be checked?
checklprows	have current LP rows to be checked?
stored	stores whether given solution was feasible and good enough to keep

Definition at line 1236 of file primal.c.

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

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

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_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_SOL **	sol,
		SCIP_Bool	printreason,
		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
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?
checkbounds	should the bounds of the variables be checked?
checkintegrality	has integrality to be checked?
checklprows	have current LP rows to be checked?
stored	stores whether solution was feasible and good enough to keep

Definition at line 1303 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().

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_LP *	lp,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_HEUR *	heur,
		SCIP_Bool	printreason,
		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
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?
checkintegrality	has integrality to be checked?
checklprows	have current LP rows to be checked?
stored	stores whether given solution was good enough to keep

Definition at line 1374 of file primal.c.

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

Referenced by SCIPtryCurrentSol().

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 1407 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(), and SCIPsolCreateUnknown().

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 1429 of file primal.c.

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

Referenced by SCIPsolFree().

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 1459 of file primal.c.

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

Referenced by SCIPeventProcess().

SCIP_RETCODE SCIPprimalRetransformSolutions	(	SCIP_PRIMAL *	primal,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	origprob,
		SCIP_PROB *	transprob
	)

retransforms all existing solutions to original problem space

Parameters

primal	primal data
set	global SCIP settings
stat	problem statistics data
origprob	original problem
transprob	transformed problem

Definition at line 1478 of file primal.c.

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

Referenced by initPresolve().

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_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
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 1503 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, SCIPdebugMessage, SCIPprimalTrySolFree(), SCIPsetAllocBufferArray, SCIPsetFreeBufferArray, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsolCreate(), SCIPsolGetHeur(), SCIPsolGetOrigObj(), SCIPsolGetVal(), SCIPsolIsOriginal(), SCIPsolSetVal(), SCIPvarGetName(), SCIPvarGetProbindex(), SCIPvarGetProbvarSum(), SCIPvarGetStatus(), SCIPvarIsActive(), TRUE, and SCIP_Prob::vars.

Referenced by primalAddSol(), and transformSols().

SCIP

Detailed Description

Functions

Function Documentation