Detailed Description

Methods and datastructures for storing and manipulating the main problem.

Author: Tobias Achterberg

Definition in file prob.c.

#include <assert.h>
#include <string.h>
#include "scip/def.h"
#include "scip/set.h"
#include "scip/stat.h"
#include "scip/event.h"
#include "scip/lp.h"
#include "scip/var.h"
#include "scip/prob.h"
#include "scip/primal.h"
#include "scip/tree.h"
#include "scip/branch.h"
#include "scip/cons.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"

Go to the source code of this file.

Macros
#define	OBJSCALE_MAXDNOM 1000000LL

#define	OBJSCALE_MAXSCALE 1000000.0

#define	OBJSCALE_MAXFINALSCALE 1000.0

Functions
static SCIP_RETCODE	probEnsureVarsMem (SCIP_PROB prob, SCIP_SET set, int num)

static SCIP_RETCODE	probEnsureFixedvarsMem (SCIP_PROB prob, SCIP_SET set, int num)

static SCIP_RETCODE	probEnsureDeletedvarsMem (SCIP_PROB prob, SCIP_SET set, int num)

static SCIP_RETCODE	probEnsureConssMem (SCIP_PROB prob, SCIP_SET set, int num)

static SCIP_Bool	consHasName (SCIP_CONS *cons)

static SCIP_Bool	varHasName (SCIP_VAR *var)

SCIP_RETCODE	SCIPprobCopy (SCIP_PROB *prob, BMS_BLKMEM blkmem, SCIP_SET set, const char name, SCIP sourcescip, SCIP_PROB sourceprob, SCIP_HASHMAP varmap, SCIP_HASHMAP consmap, SCIP_Bool global)

SCIP_RETCODE	SCIPprobCreate (SCIP_PROB *prob, BMS_BLKMEM blkmem, SCIP_SET set, const char name, SCIP_DECL_PROBDELORIG((probdelorig)), SCIP_DECL_PROBTRANS((probtrans)), SCIP_DECL_PROBDELTRANS((probdeltrans)), SCIP_DECL_PROBINITSOL((probinitsol)), SCIP_DECL_PROBEXITSOL((probexitsol)), SCIP_DECL_PROBCOPY((probcopy)), SCIP_PROBDATA *probdata, SCIP_Bool transformed)

void	SCIPprobSetDelorig (SCIP_PROB prob, SCIP_DECL_PROBDELORIG((probdelorig)))

void	SCIPprobSetTrans (SCIP_PROB prob, SCIP_DECL_PROBTRANS((probtrans)))

void	SCIPprobSetDeltrans (SCIP_PROB prob, SCIP_DECL_PROBDELTRANS((probdeltrans)))

void	SCIPprobSetInitsol (SCIP_PROB prob, SCIP_DECL_PROBINITSOL((probinitsol)))

void	SCIPprobSetExitsol (SCIP_PROB prob, SCIP_DECL_PROBEXITSOL((probexitsol)))

void	SCIPprobSetCopy (SCIP_PROB prob, SCIP_DECL_PROBCOPY((probcopy)))

SCIP_RETCODE	SCIPprobFree (SCIP_PROB *prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTQUEUE eventqueue, SCIP_LP lp)

SCIP_RETCODE	SCIPprobTransform (SCIP_PROB source, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PRIMAL primal, SCIP_TREE tree, SCIP_LP lp, SCIP_BRANCHCAND branchcand, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_PROB **target)

SCIP_RETCODE	SCIPprobResetBounds (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat)

void	SCIPprobResortVars (SCIP_PROB *prob)

void	SCIPprobSetData (SCIP_PROB prob, SCIP_PROBDATA probdata)

static void	probInsertVar (SCIP_PROB prob, SCIP_VAR var)

static SCIP_RETCODE	probRemoveVar (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_VAR var)

SCIP_RETCODE	SCIPprobAddVarName (SCIP_PROB prob, SCIP_VAR var)

SCIP_RETCODE	SCIPprobRemoveVarName (SCIP_PROB prob, SCIP_VAR var)

SCIP_RETCODE	SCIPprobAddVar (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_LP lp, SCIP_BRANCHCAND branchcand, SCIP_EVENTFILTER eventfilter, SCIP_EVENTQUEUE eventqueue, SCIP_VAR var)

SCIP_RETCODE	SCIPprobDelVar (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_EVENTQUEUE eventqueue, SCIP_VAR var, SCIP_Bool deleted)

SCIP_RETCODE	SCIPprobPerformVarDeletions (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTQUEUE eventqueue, SCIP_LP lp, SCIP_BRANCHCAND *branchcand)

SCIP_RETCODE	SCIPprobChgVarType (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_BRANCHCAND branchcand, SCIP_VAR *var, SCIP_VARTYPE vartype)

SCIP_RETCODE	SCIPprobVarChangedStatus (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_BRANCHCAND branchcand, SCIP_VAR *var)

SCIP_RETCODE	SCIPprobAddConsName (SCIP_PROB prob, SCIP_CONS cons)

SCIP_RETCODE	SCIPprobRemoveConsName (SCIP_PROB prob, SCIP_CONS cons)

SCIP_RETCODE	SCIPprobAddCons (SCIP_PROB prob, SCIP_SET set, SCIP_STAT stat, SCIP_CONS cons)

SCIP_RETCODE	SCIPprobDelCons (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_CONS *cons)

void	SCIPprobMarkNConss (SCIP_PROB *prob)

void	SCIPprobSetObjsense (SCIP_PROB *prob, SCIP_OBJSENSE objsense)

void	SCIPprobAddObjoffset (SCIP_PROB *prob, SCIP_Real addval)

void	SCIPprobSetDualbound (SCIP_PROB *prob, SCIP_Real dualbound)

void	SCIPprobSetObjlim (SCIP_PROB *prob, SCIP_Real objlim)

void	SCIPprobSetObjIntegral (SCIP_PROB *prob)

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

void	SCIPprobUpdateNObjVars (SCIP_PROB prob, SCIP_SET set, SCIP_Real oldobj, SCIP_Real newobj)

void	SCIPprobUpdateDualbound (SCIP_PROB *prob, SCIP_Real newbound)

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

void	SCIPprobStoreRootSol (SCIP_PROB prob, SCIP_SET set, SCIP_LP *lp, SCIP_Bool roothaslp)

void	SCIPprobUpdateBestRootSol (SCIP_PROB prob, SCIP_SET set, SCIP_STAT stat, SCIP_LP lp)

SCIP_RETCODE	SCIPprobExitPresolve (SCIP_PROB prob, SCIP_SET set)

SCIP_RETCODE	SCIPprobInitSolve (SCIP_PROB prob, SCIP_SET set)

SCIP_RETCODE	SCIPprobExitSolve (SCIP_PROB prob, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_EVENTQUEUE eventqueue, SCIP_LP *lp, SCIP_Bool restart)

SCIP_RETCODE	SCIPprobSetName (SCIP_PROB prob, const char name)

int	SCIPprobGetNImplBinVars (SCIP_PROB *prob)

int	SCIPprobGetNObjVars (SCIP_PROB prob, SCIP_SET set)

SCIP_Real	SCIPprobExternObjval (SCIP_PROB transprob, SCIP_PROB origprob, SCIP_SET *set, SCIP_Real objval)

SCIP_Real	SCIPprobInternObjval (SCIP_PROB transprob, SCIP_PROB origprob, SCIP_SET *set, SCIP_Real objval)

SCIP_VAR *	SCIPprobFindVar (SCIP_PROB prob, const char name)

SCIP_CONS *	SCIPprobFindCons (SCIP_PROB prob, const char name)

void	SCIPprobPrintPseudoSol (SCIP_PROB prob, SCIP_SET set, SCIP_MESSAGEHDLR *messagehdlr)

void	SCIPprobPrintStatistics (SCIP_PROB prob, SCIP_MESSAGEHDLR messagehdlr, FILE *file)

SCIP_Bool	SCIPprobIsTransformed (SCIP_PROB *prob)

SCIP_Bool	SCIPprobIsObjIntegral (SCIP_PROB *prob)

SCIP_Bool	SCIPprobAllColsInLP (SCIP_PROB prob, SCIP_SET set, SCIP_LP *lp)

SCIP_Real	SCIPprobGetObjlim (SCIP_PROB prob, SCIP_SET set)

SCIP_PROBDATA *	SCIPprobGetData (SCIP_PROB *prob)

const char *	SCIPprobGetName (SCIP_PROB *prob)

int	SCIPprobGetNVars (SCIP_PROB *prob)

int	SCIPprobGetNBinVars (SCIP_PROB *prob)

int	SCIPprobGetNIntVars (SCIP_PROB *prob)

int	SCIPprobGetNImplVars (SCIP_PROB *prob)

int	SCIPprobGetNContVars (SCIP_PROB *prob)

SCIP_VAR **	SCIPprobGetVars (SCIP_PROB *prob)

SCIP_Real	SCIPprobGetObjoffset (SCIP_PROB *prob)

SCIP_Real	SCIPprobGetObjscale (SCIP_PROB *prob)

Macro Definition Documentation

#define OBJSCALE_MAXDNOM 1000000LL

maximal denominator in objective integral scaling

Definition at line 41 of file prob.c.

Referenced by SCIPprobScaleObj().

#define OBJSCALE_MAXSCALE 1000000.0

maximal scalar to reach objective integrality

Definition at line 42 of file prob.c.

Referenced by SCIPprobScaleObj().

#define OBJSCALE_MAXFINALSCALE 1000.0

maximal final value to apply as scaling

Definition at line 43 of file prob.c.

Referenced by SCIPprobScaleObj().

Function Documentation

static SCIP_RETCODE probEnsureVarsMem	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		int	num
	)

static

resizes vars array to be able to store at least num entries

Parameters

prob	problem data
set	global SCIP settings
num	minimal number of slots in array

Definition at line 53 of file prob.c.

References BMSreallocMemoryArray, NULL, SCIP_ALLOC, SCIP_OKAY, SCIPsetCalcMemGrowSize(), SCIP_Prob::vars, and SCIP_Prob::varssize.

Referenced by SCIPprobAddVar(), and SCIPprobTransform().

static SCIP_RETCODE probEnsureFixedvarsMem	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		int	num
	)

static

resizes fixedvars array to be able to store at least num entries

Parameters

prob	problem data
set	global SCIP settings
num	minimal number of slots in array

Definition at line 77 of file prob.c.

References BMSreallocMemoryArray, SCIP_Prob::fixedvars, SCIP_Prob::fixedvarssize, NULL, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().

Referenced by SCIPprobVarChangedStatus().

static SCIP_RETCODE probEnsureDeletedvarsMem	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		int	num
	)

static

resizes deletedvars array to be able to store at least num entries

Parameters

prob	problem data
set	global SCIP settings
num	minimal number of slots in array

Definition at line 101 of file prob.c.

References BMSreallocMemoryArray, SCIP_Prob::deletedvars, SCIP_Prob::deletedvarssize, NULL, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().

Referenced by SCIPprobDelVar().

static SCIP_RETCODE probEnsureConssMem	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		int	num
	)

static

resizes conss array to be able to store at least num entries

Parameters

prob	problem data
set	global SCIP settings
num	minimal number of slots in array

Definition at line 125 of file prob.c.

References BMSreallocMemoryArray, SCIP_Prob::conss, SCIP_Prob::consssize, NULL, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().

Referenced by SCIPprobAddCons().

static SCIP_Bool consHasName ( SCIP_CONS * cons )

static

returns whether the constraint has a name

Parameters

cons	constraint

Definition at line 149 of file prob.c.

References NULL, and SCIPconsGetName().

Referenced by SCIPprobAddConsName(), and SCIPprobRemoveConsName().

static SCIP_Bool varHasName ( SCIP_VAR * var )

static

returns whether the variable has a name

Parameters

var variable

Definition at line 162 of file prob.c.

References NULL, and SCIPvarGetName().

Referenced by SCIPprobAddVarName(), and SCIPprobRemoveVarName().

SCIP_RETCODE SCIPprobCopy	(	SCIP_PROB **	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		const char *	name,
		SCIP *	sourcescip,
		SCIP_PROB *	sourceprob,
		SCIP_HASHMAP *	varmap,
		SCIP_HASHMAP *	consmap,
		SCIP_Bool	global
	)

creates problem data structure by copying the source problem; If the problem type requires the use of variable pricers, these pricers should be activated with calls to SCIPactivatePricer(). These pricers are automatically deactivated, when the problem is freed.

Parameters

prob	pointer to problem data structure
blkmem	block memory
set	global SCIP settings
name	problem name
sourcescip	source SCIP data structure
sourceprob	source problem structure
varmap	a hashmap to store the mapping of source variables corresponding target variables
consmap	a hashmap to store the mapping of source constraints to the corresponding target constraints
global	create a global or a local copy?

Definition at line 183 of file prob.c.

References FALSE, NULL, SCIP_Prob::probdata, SCIP_CALL, SCIP_DIDNOTRUN, SCIP_INVALIDRESULT, SCIP_OKAY, SCIP_SUCCESS, SCIPerrorMessage, and SCIPprobCreate().

Referenced by copyProb().

SCIP_RETCODE SCIPprobCreate	(	SCIP_PROB **	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		const char *	name,
		SCIP_DECL_PROBDELORIG((*probdelorig))	,
		SCIP_DECL_PROBTRANS((*probtrans))	,
		SCIP_DECL_PROBDELTRANS((*probdeltrans))	,
		SCIP_DECL_PROBINITSOL((*probinitsol))	,
		SCIP_DECL_PROBEXITSOL((*probexitsol))	,
		SCIP_DECL_PROBCOPY((*probcopy))	,
		SCIP_PROBDATA *	probdata,
		SCIP_Bool	transformed
	)

creates problem data structure If the problem type requires the use of variable pricers, these pricers should be activated with calls to SCIPactivatePricer(). These pricers are automatically deactivated, when the problem is freed.

Parameters

prob	pointer to problem data structure
blkmem	block memory
set	global SCIP settings
name	problem name
probdata	user problem data set by the reader
transformed	is this the transformed problem?

Definition at line 249 of file prob.c.

References BMSallocMemory, BMSduplicateMemoryArray, FALSE, NULL, SCIP_ALLOC, SCIP_CALL, SCIP_HASHSIZE_NAMES, SCIP_HASHSIZE_NAMES_SMALL, SCIP_INVALID, SCIP_OBJSENSE_MINIMIZE, SCIP_OKAY, and SCIPhashtableCreate().

Referenced by SCIPcreateProb(), SCIPprobCopy(), and SCIPprobTransform().

void SCIPprobSetDelorig	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBDELORIG((*probdelorig))
	)

sets callback to free user data of original problem

Parameters

prob problem

Definition at line 325 of file prob.c.

References NULL.

Referenced by SCIPsetProbDelorig().

void SCIPprobSetTrans	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBTRANS((*probtrans))
	)

sets callback to create user data of transformed problem by transforming original user data

Parameters

prob problem

Definition at line 336 of file prob.c.

References NULL.

Referenced by SCIPsetProbTrans().

void SCIPprobSetDeltrans	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBDELTRANS((*probdeltrans))
	)

sets callback to free user data of transformed problem

Parameters

prob problem

Definition at line 347 of file prob.c.

References NULL.

Referenced by SCIPsetProbDeltrans().

void SCIPprobSetInitsol	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBINITSOL((*probinitsol))
	)

sets solving process initialization callback of transformed data

Parameters

prob problem

Definition at line 358 of file prob.c.

References NULL.

Referenced by SCIPsetProbInitsol().

void SCIPprobSetExitsol	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBEXITSOL((*probexitsol))
	)

sets solving process deinitialization callback of transformed data

Parameters

prob problem

Definition at line 369 of file prob.c.

References NULL.

Referenced by SCIPsetProbExitsol().

void SCIPprobSetCopy	(	SCIP_PROB *	prob,
		SCIP_DECL_PROBCOPY((*probcopy))
	)

sets callback to copy user data to copy it to a subscip, or NULL

Parameters

prob problem

Definition at line 380 of file prob.c.

References NULL.

Referenced by SCIPsetProbCopy().

SCIP_RETCODE SCIPprobFree	(	SCIP_PROB **	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_LP *	lp
	)

frees problem data structure

Parameters

prob	pointer to problem data structure
blkmem	block memory buffer
set	global SCIP settings
stat	dynamic problem statistics
eventqueue	event queue
lp	current LP data (or NULL, if it's the original problem)

Definition at line 391 of file prob.c.

References BMSfreeMemory, BMSfreeMemoryArray, BMSfreeMemoryArrayNull, NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrNeedsCons(), SCIPconshdlrUnlockVars(), SCIPhashtableFree(), SCIPprobDelCons(), SCIPvarGetProbindex(), SCIPvarRelease(), SCIPvarRemove(), and TRUE.

Referenced by freeTransform(), and SCIPfreeProb().

SCIP_RETCODE SCIPprobTransform	(	SCIP_PROB *	source,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PRIMAL *	primal,
		SCIP_TREE *	tree,
		SCIP_LP *	lp,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_PROB **	target
	)

transform problem data into normalized form

Parameters

source	problem to transform
blkmem	block memory buffer
set	global SCIP settings
stat	problem statistics
primal	primal data
tree	branch and bound tree
lp	current LP data
branchcand	branching candidate storage
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
target	pointer to target problem data structure

Definition at line 483 of file prob.c.

References SCIP_Prob::conss, SCIP_Prob::dualbound, SCIP_Prob::name, NULL, SCIP_Prob::nvars, SCIP_Prob::objisintegral, SCIP_Prob::objlim, SCIP_Prob::objsense, SCIP_Prob::probdata, probEnsureVarsMem(), SCIP_CALL, SCIP_INVALID, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPconshdlrLockVars(), SCIPconshdlrNeedsCons(), SCIPconsRelease(), SCIPconsTransform(), SCIPdebugMessage, SCIPprobAddCons(), SCIPprobAddVar(), SCIPprobCheckObjIntegral(), SCIPprobCreate(), SCIPprobGetNObjVars(), SCIPprobSetDualbound(), SCIPprobSetObjlim(), SCIPprobSetObjsense(), SCIPsetIsIntegral(), SCIPsnprintf(), SCIPvarRelease(), SCIPvarTransform(), TRUE, and SCIP_Prob::vars.

Referenced by SCIPtransformProb().

SCIP_RETCODE SCIPprobResetBounds	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat
	)

resets the global and local bounds of original variables in original problem to their original values

Parameters

prob	original problem data
blkmem	block memory
set	global SCIP settings
stat	problem statistics

Definition at line 573 of file prob.c.

References SCIP_Prob::nfixedvars, NULL, SCIP_Prob::nvars, SCIP_CALL, SCIP_OKAY, SCIPvarResetBounds(), SCIP_Prob::transformed, and SCIP_Prob::vars.

Referenced by freeTransform().

void SCIPprobResortVars ( SCIP_PROB * prob )

(Re)Sort the variables, which appear in the four categories (binary, integer, implicit, continuous) after presolve with respect to their original index (within their categories). Adjust the problem index afterwards which is supposed to reflect the position in the variable array. This additional (re)sorting is supposed to get more robust against the order presolving fixed variables. (We also reobtain a possible block structure induced by the user model)

Parameters

prob	problem data

Definition at line 600 of file prob.c.

References SCIP_Prob::nbinvars, SCIP_Prob::ncontvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, SCIP_Var::probindex, SCIPdebugMessage, SCIPsortPtr(), and SCIP_Prob::vars.

Referenced by presolve().

void SCIPprobSetData	(	SCIP_PROB *	prob,
		SCIP_PROBDATA *	probdata
	)

sets user problem data

Parameters

prob	problem
probdata	user problem data to use

Definition at line 658 of file prob.c.

References NULL, and SCIP_Prob::probdata.

Referenced by SCIPsetProbData().

static void probInsertVar	(	SCIP_PROB *	prob,
		SCIP_VAR *	var
	)

static

inserts variable at the correct position in vars array, depending on its type

Parameters

prob	problem data
var	variable to insert

Definition at line 670 of file prob.c.

References SCIP_Prob::nbinvars, SCIP_Prob::ncolvars, SCIP_Prob::ncontvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIP_VARSTATUS_ORIGINAL, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetType(), SCIPvarSetProbindex(), SCIP_Prob::transformed, SCIP_Prob::vars, and SCIP_Prob::varssize.

Referenced by SCIPprobAddVar(), and SCIPprobChgVarType().

static SCIP_RETCODE probRemoveVar	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_VAR *	var
	)

static

removes variable from vars array

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
var	variable to remove

Definition at line 758 of file prob.c.

References FALSE, SCIP_Prob::nbinvars, SCIP_Prob::ncolvars, SCIP_Prob::ncontvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPABORT, SCIPerrorMessage, SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetType(), SCIPvarRemove(), SCIPvarSetProbindex(), and SCIP_Prob::vars.

Referenced by SCIPprobChgVarType(), SCIPprobPerformVarDeletions(), and SCIPprobVarChangedStatus().

SCIP_RETCODE SCIPprobAddVarName	(	SCIP_PROB *	prob,
		SCIP_VAR *	var
	)

adds variable's name to the namespace

Parameters

prob	problem data
var	variable

Definition at line 851 of file prob.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPhashtableInsert(), SCIPvarGetProbindex(), varHasName(), and SCIP_Prob::varnames.

Referenced by SCIPchgVarName(), and SCIPprobAddVar().

SCIP_RETCODE SCIPprobRemoveVarName	(	SCIP_PROB *	prob,
		SCIP_VAR *	var
	)

removes variable's name from the namespace

Parameters

prob	problem data
var	variable

Definition at line 867 of file prob.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPhashtableExists(), SCIPhashtableRemove(), varHasName(), and SCIP_Prob::varnames.

Referenced by SCIPchgVarName(), and SCIPprobPerformVarDeletions().

SCIP_RETCODE SCIPprobAddVar	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_LP *	lp,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_VAR *	var
	)

adds variable to the problem and captures it

Parameters

prob	problem data
blkmem	block memory buffers
set	global SCIP settings
lp	current LP data
branchcand	branching candidate storage
eventfilter	event filter for global (not variable dependent) events
eventqueue	event queue
var	variable to add

Definition at line 882 of file prob.c.

References SCIP_Prob::nbinvars, SCIP_Prob::ncontvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, probEnsureVarsMem(), probInsertVar(), SCIP_Var::scip, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIP_VARSTATUS_ORIGINAL, SCIPbranchcandUpdateVar(), SCIPdebugMessage, SCIPerrorMessage, SCIPeventCreateVarAdded(), SCIPeventqueueAdd(), SCIPlpUpdateAddVar(), SCIPprobAddVarName(), SCIPprobUpdateNObjVars(), SCIPvarCapture(), SCIPvarGetName(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and SCIP_Prob::transformed.

Referenced by SCIPaddPricedVar(), SCIPaddVar(), SCIPprobTransform(), and tryAggregateIntVars().

SCIP_RETCODE SCIPprobDelVar	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_VAR *	var,
		SCIP_Bool *	deleted
	)

marks variable to be removed from the problem; however, the variable is NOT removed from the constraints

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
eventqueue	event queue
var	problem variable
deleted	pointer to store whether marking variable to be deleted was successful

Definition at line 950 of file prob.c.

References SCIP_Prob::deletedvars, FALSE, SCIP_Prob::nbinvars, SCIP_Prob::ncontvars, SCIP_Prob::ndeletedvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, probEnsureDeletedvarsMem(), SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIP_VARSTATUS_ORIGINAL, SCIPdebugMessage, SCIPeventCreateVarDeleted(), SCIPeventqueueAdd(), SCIPvarGetName(), SCIPvarGetNegatedVar(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarIsTransformedOrigvar(), SCIPvarMarkDeleted(), SCIP_Prob::transformed, and TRUE.

Referenced by focusnodeCleanupVars(), and SCIPdelVar().

SCIP_RETCODE SCIPprobPerformVarDeletions	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_LP *	lp,
		SCIP_BRANCHCAND *	branchcand
	)

actually removes the deleted variables from the problem and releases them

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
stat	dynamic problem statistics
eventqueue	event queue
lp	current LP data (may be NULL)
branchcand	branching candidate storage

Definition at line 1011 of file prob.c.

References SCIP_Prob::deletedvars, SCIP_Prob::ndeletedvars, NULL, probRemoveVar(), SCIP_CALL, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_ORIGINAL, SCIPbranchcandRemoveVar(), SCIPconshdlrDelVars(), SCIPdebugMessage, SCIPlpUpdateDelVar(), SCIPprobRemoveVarName(), SCIPprobUpdateNObjVars(), SCIPsetGetStage(), SCIPvarGetName(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarLoose(), SCIPvarRelease(), and SCIP_Prob::transformed.

Referenced by exitPresolve(), focusnodeCleanupVars(), initPresolve(), presolveRound(), and SCIPdelVar().

SCIP_RETCODE SCIPprobChgVarType	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_VAR *	var,
		SCIP_VARTYPE	vartype
	)

changes the type of a variable in the problem

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
branchcand	branching candidate storage
var	variable to add
vartype	new type of variable

Definition at line 1081 of file prob.c.

References NULL, probInsertVar(), probRemoveVar(), SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIP_VARSTATUS_ORIGINAL, SCIPbranchcandRemoveVar(), SCIPbranchcandUpdateVar(), SCIPvarChgType(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and SCIPvarGetType().

Referenced by SCIPchgVarType().

SCIP_RETCODE SCIPprobVarChangedStatus	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_VAR *	var
	)

informs problem, that the given loose problem variable changed its status

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
branchcand	branching candidate storage
var	problem variable

Definition at line 1126 of file prob.c.

References SCIP_Prob::fixedvars, SCIP_Prob::ncolvars, SCIP_Prob::nfixedvars, NULL, SCIP_Prob::nvars, probEnsureFixedvarsMem(), probRemoveVar(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_VARSTATUS_AGGREGATED, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_FIXED, SCIP_VARSTATUS_LOOSE, SCIP_VARSTATUS_MULTAGGR, SCIP_VARSTATUS_NEGATED, SCIP_VARSTATUS_ORIGINAL, SCIPbranchcandUpdateVar(), SCIPerrorMessage, SCIPvarGetProbindex(), and SCIPvarGetStatus().

Referenced by SCIPvarAggregate(), SCIPvarColumn(), SCIPvarFix(), SCIPvarLoose(), and SCIPvarMultiaggregate().

SCIP_RETCODE SCIPprobAddConsName	(	SCIP_PROB *	prob,
		SCIP_CONS *	cons
	)

adds constraint's name to the namespace

Parameters

prob	problem data
cons	constraint

Definition at line 1183 of file prob.c.

References consHasName(), SCIP_Prob::consnames, NULL, SCIP_CALL, SCIP_OKAY, and SCIPhashtableInsert().

Referenced by SCIPchgConsName(), and SCIPprobAddCons().

SCIP_RETCODE SCIPprobRemoveConsName	(	SCIP_PROB *	prob,
		SCIP_CONS *	cons
	)

remove constraint's name from the namespace

Parameters

prob	problem data
cons	constraint

Definition at line 1198 of file prob.c.

References consHasName(), SCIP_Prob::consnames, NULL, SCIP_CALL, SCIP_OKAY, SCIPhashtableExists(), and SCIPhashtableRemove().

Referenced by SCIPchgConsName(), and SCIPprobDelCons().

SCIP_RETCODE SCIPprobAddCons	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_CONS *	cons
	)

adds constraint to the problem and captures it; a local constraint is automatically upgraded into a global constraint

Parameters

prob	problem data
set	global SCIP settings
stat	dynamic problem statistics
cons	constraint to add

Definition at line 1216 of file prob.c.

References SCIP_Cons::addarraypos, SCIP_Cons::addconssetchg, SCIP_Prob::conss, SCIP_Cons::deleted, FALSE, MAX, SCIP_Prob::maxnconss, SCIP_Prob::nconss, SCIP_Stat::nnodes, NULL, probEnsureConssMem(), SCIP_Cons::scip, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsActivate(), SCIPconsAddLocks(), SCIPconsCapture(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsChecked(), SCIPconsSetLocal(), SCIPdebugMessage, SCIPerrorMessage, SCIPprobAddConsName(), and SCIP_Prob::transformed.

Referenced by SCIPaddCons(), SCIPaddConsNode(), SCIPconssetchgMakeGlobal(), and SCIPprobTransform().

SCIP_RETCODE SCIPprobDelCons	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_CONS *	cons
	)

releases and removes constraint from the problem; if the user has not captured the constraint for his own use, the constraint may be invalid after the call

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
stat	dynamic problem statistics
cons	constraint to remove

Definition at line 1283 of file prob.c.

References SCIP_Cons::active, SCIP_Cons::addarraypos, SCIP_Cons::addconssetchg, SCIP_Prob::conss, SCIP_Cons::enabled, SCIP_Prob::nconss, NULL, SCIP_CALL, SCIP_OKAY, SCIPconsAddLocks(), SCIPconsDeactivate(), SCIPconsIsChecked(), SCIPconsRelease(), SCIPprobRemoveConsName(), SCIP_Prob::transformed, and SCIP_Cons::updatedeactivate.

Referenced by SCIPconsDelete(), and SCIPprobFree().

void SCIPprobMarkNConss ( SCIP_PROB * prob )

remembers the current number of constraints in the problem's internal data structure

resets maximum number of constraints to current number of constraints
remembers current number of constraints as starting number of constraints

Parameters

prob	problem data

Definition at line 1343 of file prob.c.

References SCIP_Prob::maxnconss, SCIP_Prob::nconss, NULL, SCIP_Prob::nvars, SCIP_Prob::startnconss, and SCIP_Prob::startnvars.

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

void SCIPprobSetObjsense	(	SCIP_PROB *	prob,
		SCIP_OBJSENSE	objsense
	)

sets objective sense: minimization or maximization

Parameters

prob	problem data
objsense	new objective sense

Definition at line 1356 of file prob.c.

References NULL, SCIP_Prob::objsense, SCIP_OBJSENSE_MAXIMIZE, and SCIP_OBJSENSE_MINIMIZE.

Referenced by SCIPprobTransform(), and SCIPsetObjsense().

void SCIPprobAddObjoffset	(	SCIP_PROB *	prob,
		SCIP_Real	addval
	)

adds value to objective offset

Parameters

prob	problem data
addval	value to add to objective offset

Definition at line 1369 of file prob.c.

References NULL, SCIP_Prob::objoffset, SCIPdebugMessage, and SCIP_Prob::transformed.

Referenced by SCIPaddObjoffset(), and SCIPvarAddObj().

void SCIPprobSetDualbound	(	SCIP_PROB *	prob,
		SCIP_Real	dualbound
	)

sets the dual bound on objective function

Parameters

prob	problem data
dualbound	external dual bound

Definition at line 1382 of file prob.c.

References SCIP_Prob::dualbound, and NULL.

Referenced by SCIPprobTransform(), and SCIPprobUpdateDualbound().

void SCIPprobSetObjlim	(	SCIP_PROB *	prob,
		SCIP_Real	objlim
	)

sets limit on objective function, such that only solutions better than this limit are accepted

Parameters

prob	problem data
objlim	external objective limit

Definition at line 1393 of file prob.c.

References NULL, and SCIP_Prob::objlim.

Referenced by SCIPprimalSetCutoffbound(), SCIPprobTransform(), and SCIPsetObjlimit().

void SCIPprobSetObjIntegral ( SCIP_PROB * prob )

informs the problem, that its objective value is always integral in every feasible solution

Parameters

prob	problem data

Definition at line 1404 of file prob.c.

References NULL, SCIP_Prob::objisintegral, and TRUE.

Referenced by SCIPsetObjIntegral().

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

sets integral objective value flag, if all variables with non-zero objective values are integral and have integral objective value and also updates the cutoff bound if primal solution is already known

Parameters

transprob	tranformed problem data
origprob	original problem data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
primal	primal data
tree	branch and bound tree
lp	current LP data
eventqueue	event queue

Definition at line 1416 of file prob.c.

References NULL, SCIP_Prob::nvars, SCIP_Prob::objisintegral, SCIP_Prob::objoffset, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPprimalUpdateObjoffset(), SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPvarGetObj(), SCIPvarGetType(), TRUE, and SCIP_Prob::vars.

Referenced by exitPresolve(), SCIPprobTransform(), and SCIPtransformProb().

void SCIPprobUpdateNObjVars	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_Real	oldobj,
		SCIP_Real	newobj
	)

update the number of variables with non-zero objective coefficient

Parameters

prob	problem data
set	global SCIP settings
oldobj	old objective value for variable
newobj	new objective value for variable

Definition at line 1478 of file prob.c.

References SCIP_Prob::nobjvars, SCIPsetIsZero(), and SCIP_Prob::transformed.

Referenced by SCIPprobAddVar(), SCIPprobPerformVarDeletions(), SCIPvarAddObj(), and SCIPvarChgObj().

void SCIPprobUpdateDualbound	(	SCIP_PROB *	prob,
		SCIP_Real	newbound
	)

update the dual bound if its better as the current one

Parameters

prob	problem data
newbound	new dual bound for the node (if it's tighter than the old one)

Definition at line 1495 of file prob.c.

References SCIP_Prob::dualbound, MAX, MIN, SCIP_Prob::objsense, SCIP_INVALID, SCIP_OBJSENSE_MAXIMIZE, SCIP_OBJSENSE_MINIMIZE, SCIPABORT, SCIPerrorMessage, and SCIPprobSetDualbound().

Referenced by freeSolve(), SCIPupdateLocalDualbound(), and SCIPupdateLocalLowerbound().

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

if possible, scales objective function such that it is integral with gcd = 1

Parameters

transprob	tranformed problem data
origprob	original problem data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
primal	primal data
tree	branch and bound tree
lp	current LP data
eventqueue	event queue

Definition at line 1522 of file prob.c.

References SCIP_Prob::ncontvars, NULL, SCIP_Prob::nvars, SCIP_Prob::objisintegral, SCIP_Prob::objoffset, SCIP_Prob::objscale, OBJSCALE_MAXDNOM, OBJSCALE_MAXFINALSCALE, OBJSCALE_MAXSCALE, REALABS, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPcalcGreComDiv(), SCIPcalcIntegralScalar(), SCIPdebugMessage, SCIPprimalUpdateObjoffset(), SCIPsetAllocBufferArray, SCIPsetEpsilon(), SCIPsetFeasFloor(), SCIPsetFreeBufferArray, SCIPsetIsEQ(), SCIPsetIsFeasIntegral(), SCIPsetIsZero(), SCIPvarChgObj(), SCIPvarGetName(), SCIPvarGetObj(), TRUE, and SCIP_Prob::vars.

Referenced by exitPresolve(), and SCIPtransformProb().

void SCIPprobStoreRootSol	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_LP *	lp,
		SCIP_Bool	roothaslp
	)

remembers the current solution as root solution in the problem variables

Parameters

prob	problem data
set	global SCIP settings
lp	current LP data
roothaslp	is the root solution from LP?

Definition at line 1645 of file prob.c.

References NULL, SCIP_Prob::nvars, SCIPlpIsRelax(), SCIPlpSetRootLPIsRelax(), SCIPlpStoreRootObjval(), SCIPvarStoreRootSol(), SCIP_Prob::transformed, and SCIP_Prob::vars.

Referenced by solveNode().

void SCIPprobUpdateBestRootSol	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_LP *	lp
	)

remembers the best solution w.r.t. root reduced cost propagation as root solution in the problem variables

Parameters

prob	problem data
set	global SCIP settings
stat	problem statistics
lp	current LP data

Definition at line 1668 of file prob.c.

References FALSE, SCIP_Lp::lpsolstat, NULL, SCIP_Prob::nvars, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_Bool, SCIP_INVALID, SCIP_LPSOLSTAT_OPTIMAL, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPcolGetBasisStatus(), SCIPcolGetPrimsol(), SCIPcolGetRedcost(), SCIPdebugMessage, SCIPlpGetObjval(), SCIPlpGetSolstat(), SCIPlpIsSolBasic(), SCIPprobGetNObjVars(), SCIPsetIsFeasEQ(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPvarGetCol(), SCIPvarGetImplRedcost(), SCIPvarGetLbLocal(), SCIPvarGetSol(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), SCIPvarIsBinary(), SCIPvarUpdateBestRootSol(), SCIP_Prob::transformed, TRUE, and SCIP_Prob::vars.

Referenced by priceAndCutLoop(), and propAndSolve().

SCIP_RETCODE SCIPprobExitPresolve	(	SCIP_PROB *	prob,
		SCIP_SET *	set
	)

informs problem, that the presolving process was finished, and updates all internal data structures

Parameters

prob	problem data
set	global SCIP settings

Definition at line 1763 of file prob.c.

References SCIP_OKAY.

Referenced by exitPresolve().

SCIP_RETCODE SCIPprobInitSolve	(	SCIP_PROB *	prob,
		SCIP_SET *	set
	)

initializes problem for branch and bound process and resets all constraint's ages and histories of current run

Parameters

prob	problem data
set	global SCIP settings

Definition at line 1772 of file prob.c.

References SCIP_Prob::conss, SCIP_Prob::nconss, SCIP_Prob::nobjvars, NULL, SCIP_Prob::nvars, SCIP_Prob::probdata, SCIP_CALL, SCIP_OKAY, SCIPconsResetAge(), SCIPprobGetNObjVars(), SCIPvarInitSolve(), SCIP_Prob::transformed, and SCIP_Prob::vars.

Referenced by initSolve().

SCIP_RETCODE SCIPprobExitSolve	(	SCIP_PROB *	prob,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_LP *	lp,
		SCIP_Bool	restart
	)

deinitializes problem after branch and bound process, and converts all COLUMN variables back into LOOSE variables

Parameters

prob	problem data
blkmem	block memory
set	global SCIP settings
eventqueue	event queue
lp	current LP data
restart	was this exit solve call triggered by a restart?

Definition at line 1807 of file prob.c.

References SCIP_Prob::ncolvars, NULL, SCIP_Prob::nvars, SCIP_Prob::probdata, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPvarGetStatus(), SCIPvarLoose(), SCIPvarSetBestRootSol(), SCIP_Prob::transformed, and SCIP_Prob::vars.

Referenced by freeSolve().

SCIP_RETCODE SCIPprobSetName	(	SCIP_PROB *	prob,
		const char *	name
	)

sets problem name

Parameters

prob	problem data
name	name to be set

Definition at line 1857 of file prob.c.

References BMSduplicateMemoryArray, BMSfreeMemoryArray, SCIP_Prob::name, NULL, SCIP_ALLOC, and SCIP_OKAY.

Referenced by SCIPsetProbName().

int SCIPprobGetNImplBinVars ( SCIP_PROB * prob )

returns the number of implicit binary variables, meaning variable of vartype != SCIP_VARTYPE_BINARY and != SCIP_VARTYPE_CONTINUOUS but with global bounds [0,1]

Note: this number needs to be computed, because it cannot be updated like the other counters for binary and integer variables, each time the variable type changes(, we would need to update this counter each time a global bound changes), even at the end of presolving this cannot be computed, because some variable can change to an implicit binary status

Parameters

prob	problem data

Definition at line 1878 of file prob.c.

References SCIP_Prob::nbinvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, SCIPvarIsBinary(), and SCIP_Prob::vars.

Referenced by SCIPshrinkDisjunctiveVarSet().

int SCIPprobGetNObjVars	(	SCIP_PROB *	prob,
		SCIP_SET *	set
	)

returns the number of variables with non-zero objective coefficient

Parameters

prob	problem data
set	global SCIP settings

Definition at line 1895 of file prob.c.

References SCIP_Prob::nobjvars, SCIP_Prob::nvars, SCIPsetIsZero(), SCIPvarGetObj(), SCIP_Prob::transformed, and SCIP_Prob::vars.

Referenced by SCIPgetNObjVars(), SCIPprobInitSolve(), SCIPprobTransform(), and SCIPprobUpdateBestRootSol().

SCIP_Real SCIPprobExternObjval	(	SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_SET *	set,
		SCIP_Real	objval
	)

returns the external value of the given internal objective value

Parameters

transprob	tranformed problem data
origprob	original problem data
set	global SCIP settings
objval	internal objective value

Definition at line 1937 of file prob.c.

References NULL, SCIP_Prob::objoffset, SCIP_Prob::objscale, SCIP_Prob::objsense, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), and SCIP_Prob::transformed.

Referenced by applyBounding(), getDualbound(), getPrimalbound(), primalAddSol(), SCIPgetAvgDualbound(), SCIPgetDualboundRoot(), SCIPgetLocalDualbound(), SCIPgetLocalOrigEstimate(), SCIPgetNodeDualbound(), SCIPgetSolOrigObj(), SCIPprimalSetCutoffbound(), SCIPprintSol(), SCIPretransformObj(), SCIPstatUpdatePrimalDualIntegral(), SCIPupdateLocalDualbound(), SCIPupdateLocalLowerbound(), and solveNodeInitialLP().

SCIP_Real SCIPprobInternObjval	(	SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_SET *	set,
		SCIP_Real	objval
	)

returns the internal value of the given external objective value

Parameters

transprob	tranformed problem data
origprob	original problem data
set	global SCIP settings
objval	external objective value

Definition at line 1959 of file prob.c.

References NULL, SCIP_Prob::objoffset, SCIP_Prob::objscale, SCIP_Prob::objsense, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), and SCIP_Prob::transformed.

Referenced by exitPresolve(), getDualbound(), initSolve(), presolve(), primalAddSol(), SCIPgetFirstLPLowerboundRoot(), SCIPprimalUpdateObjlimit(), SCIPprimalUpdateObjoffset(), SCIPsetObjlimit(), SCIPsolGetObj(), SCIPsolveCIP(), SCIPtransformObj(), SCIPupdateLocalDualbound(), and SCIPupdateNodeDualbound().

SCIP_VAR* SCIPprobFindVar	(	SCIP_PROB *	prob,
		const char *	name
	)

returns variable of the problem with given name

Parameters

prob	problem data
name	name of variable to find

Definition at line 1981 of file prob.c.

References NULL, SCIPABORT, SCIPerrorMessage, SCIPhashtableRetrieve(), and SCIP_Prob::varnames.

Referenced by SCIPfindVar().

SCIP_CONS* SCIPprobFindCons	(	SCIP_PROB *	prob,
		const char *	name
	)

returns constraint of the problem with given name

Parameters

prob	problem data
name	name of variable to find

Definition at line 2000 of file prob.c.

References SCIP_Prob::consnames, NULL, SCIPABORT, SCIPerrorMessage, and SCIPhashtableRetrieve().

Referenced by SCIPfindCons(), and SCIPfindOrigCons().

void SCIPprobPrintPseudoSol	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr
	)

displays current pseudo solution

Parameters

prob	problem data
set	global SCIP settings
messagehdlr	message handler

Definition at line 2019 of file prob.c.

References NULL, SCIP_Prob::nvars, SCIP_Real, SCIPmessagePrintInfo(), SCIPsetIsZero(), SCIPvarGetName(), SCIPvarGetPseudoSol(), and SCIP_Prob::vars.

void SCIPprobPrintStatistics	(	SCIP_PROB *	prob,
		SCIP_MESSAGEHDLR *	messagehdlr,
		FILE *	file
	)

outputs problem statistics

Parameters

prob	problem data
messagehdlr	message handler
file	output file (or NULL for standard output)

Definition at line 2041 of file prob.c.

References SCIP_Prob::maxnconss, SCIP_Prob::name, SCIP_Prob::nbinvars, SCIP_Prob::ncontvars, SCIP_Prob::nimplvars, SCIP_Prob::nintvars, NULL, SCIP_Prob::nvars, SCIP_Prob::objsense, SCIP_OBJSENSE_MINIMIZE, SCIPmessageFPrintInfo(), SCIP_Prob::startnconss, and SCIP_Prob::transformed.

Referenced by SCIPprintStatistics().

SCIP_Bool SCIPprobIsTransformed ( SCIP_PROB * prob )

is the problem data transformed

Parameters

prob	problem data

Definition at line 2080 of file prob.c.

References NULL, and SCIP_Prob::transformed.

Referenced by applyImplic(), detectImpliedBounds(), SCIPvarAddVlb(), SCIPvarAddVub(), SCIPvarFixBinary(), and varAddImplic().

SCIP_Bool SCIPprobIsObjIntegral ( SCIP_PROB * prob )

returns whether the objective value is known to be integral in every feasible solution

Parameters

prob	problem data

Definition at line 2090 of file prob.c.

References NULL, and SCIP_Prob::objisintegral.

Referenced by primalSetUpperbound(), SCIPisObjIntegral(), and SCIPpresolve().

SCIP_Bool SCIPprobAllColsInLP	(	SCIP_PROB *	prob,
		SCIP_SET *	set,
		SCIP_LP *	lp
	)

returns TRUE iff all columns, i.e. every variable with non-empty column w.r.t. all ever created rows, are present in the LP, and FALSE, if there are additional already existing columns, that may be added to the LP in pricing

Parameters