Detailed Description

data structures and methods for collecting reoptimization information

Author: Jakob Witzig

Definition in file reopt.h.

#include "scip/def.h"
#include "scip/pub_reopt.h"
#include "scip/type_primal.h"
#include "scip/type_sepastore.h"
#include "scip/type_cutpool.h"
#include "scip/type_retcode.h"
#include "scip/type_misc.h"
#include "scip/type_reopt.h"
#include "scip/struct_reopt.h"
#include "scip/struct_var.h"
#include "scip/struct_history.h"

Go to the source code of this file.

Functions
SCIP_RETCODE	SCIPreoptCreate (SCIP_REOPT *reopt, SCIP_SET set, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptFree (SCIP_REOPT *reopt, SCIP_SET set, SCIP_PRIMAL origprimal, BMS_BLKMEM blkmem)

int	SCIPreoptGetNAddedConss (SCIP_REOPT reopt, SCIP_NODE node)

SCIP_RETCODE	SCIPreoptAddSol (SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT stat, SCIP_PRIMAL origprimal, BMS_BLKMEM blkmem, SCIP_SOL sol, SCIP_Bool bestsol, SCIP_Bool added, SCIP_VAR *vars, int nvars, int run)

SCIP_RETCODE	SCIPreoptAddOptSol (SCIP_REOPT reopt, SCIP_SOL sol, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PRIMAL origprimal, SCIP_VAR **vars, int nvars)

SCIP_RETCODE	SCIPreoptAddRun (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_VAR *origvars, int norigvars, int size)

int	SCIPreoptGetNCheckedSols (SCIP_REOPT *reopt)

void	SCIPreoptAddNCheckedSols (SCIP_REOPT *reopt, int ncheckedsols)

int	SCIPreoptGetNImprovingSols (SCIP_REOPT *reopt)

void	SCIPreoptAddNImprovingSols (SCIP_REOPT *reopt, int nimprovingsols)

int	SCIPreoptGetNSolsRun (SCIP_REOPT *reopt, int run)

int	SCIPreoptGetNSols (SCIP_REOPT *reopt)

SCIP_RETCODE	SCIPreoptGetSolsRun (SCIP_REOPT reopt, int run, SCIP_SOL sols, int solssize, int nsols)

int	SCIPreoptGetNSavedSols (SCIP_REOPT *reopt)

SCIP_RETCODE	SCIPreoptCheckRestart (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_NODE node, SCIP_VAR *transvars, int ntransvars, SCIP_Bool restart)

SCIP_Real	SCIPreoptGetSimToPrevious (SCIP_REOPT *reopt)

SCIP_Real	SCIPreoptGetSimToFirst (SCIP_REOPT *reopt)

SCIP_Real	SCIPreoptGetSimilarity (SCIP_REOPT reopt, SCIP_SET set, int run1, int run2, SCIP_VAR **origvars, int norigvars)

SCIP_SOL *	SCIPreoptGetLastBestSol (SCIP_REOPT *reopt)

SCIP_REOPTNODE *	SCIPreoptGetReoptnode (SCIP_REOPT *reopt, unsigned int id)

SCIP_Real	SCIPreoptGetOldObjCoef (SCIP_REOPT *reopt, int run, int idx)

SCIP_SOL *	SCIPreoptGetBestSolRun (SCIP_REOPT *reopt, int run)

SCIP_RETCODE	SCIPreoptReset (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM *blkmem)

void	SCIPreoptResetSolMarks (SCIP_REOPT *reopt)

int	SCIPreoptGetNNodes (SCIP_REOPT reopt, SCIP_NODE node)

SCIP_RETCODE	SCIPreoptAddInfNode (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_NODE node)

SCIP_RETCODE	SCIPreoptCheckCutoff (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_NODE node, SCIP_EVENTTYPE eventtype, SCIP_LP *lp, SCIP_LPSOLSTAT lpsolstat, SCIP_Bool isrootnode, SCIP_Bool isfocusnode, SCIP_Real lowerbound, int effectiverootdepth)

SCIP_RETCODE	SCIPreoptAddDualBndchg (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_NODE node, SCIP_VAR *var, SCIP_Real newval, SCIP_Real oldval)

int	SCIPreoptGetNDualBndchgs (SCIP_REOPT reopt, SCIP_NODE node)

int	SCIPreoptGetNLeaves (SCIP_REOPT reopt, SCIP_NODE node)

SCIP_RETCODE	SCIPreoptGetChildIDs (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_NODE node, unsigned int childs, int childssize, int nchilds)

SCIP_RETCODE	SCIPreoptGetLeaves (SCIP_REOPT reopt, SCIP_NODE node, unsigned int leaves, int leavessize, int nleaves)

SCIP_Real	SCIPreoptGetSavingtime (SCIP_REOPT *reopt)

SCIP_RETCODE	SCIPreoptAddGlbCons (SCIP_REOPT reopt, SCIP_VAR vars, SCIP_Real vals, int nvars, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptApplyGlbConss (SCIP scip, SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT stat, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptApplyCuts (SCIP_REOPT reopt, SCIP_NODE node, SCIP_SEPASTORE sepastore, SCIP_CUTPOOL cutpool, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_EVENTQUEUE eventqueue, SCIP_EVENTFILTER eventfilter, SCIP_LP lp, SCIP_Bool root)

SCIP_Bool	SCIPreoptGetSolveLP (SCIP_REOPT reopt, SCIP_SET set, SCIP_NODE *node)

SCIP_RETCODE	SCIPreoptApply (SCIP_REOPT reopt, SCIP scip, SCIP_SET set, SCIP_STAT stat, SCIP_PROB transprob, SCIP_PROB origprob, SCIP_TREE tree, SCIP_LP lp, SCIP_BRANCHCAND branchcand, SCIP_EVENTQUEUE eventqueue, SCIP_CLIQUETABLE cliquetable, BMS_BLKMEM blkmem, SCIP_REOPTNODE reoptnode, unsigned int id, SCIP_Real estimate, SCIP_NODE childnodes, int ncreatedchilds, int naddedconss, int childnodessize, SCIP_Bool success)

SCIP_RETCODE	SCIPreoptDeleteNode (SCIP_REOPT reopt, SCIP_SET set, unsigned int id, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptResetDualBndchgs (SCIP_REOPT reopt, SCIP_NODE node, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptSplitRoot (SCIP_REOPT reopt, SCIP_TREE tree, SCIP_SET set, SCIP_STAT stat, BMS_BLKMEM blkmem, int ncreatedchilds, int *naddedconss)

SCIP_RETCODE	SCIPreoptApplyCompression (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_REOPTNODE representatives, int nrepresentatives, SCIP_Bool success)

SCIP_RETCODE	SCIPreoptSaveOpenNodes (SCIP_REOPT reopt, SCIP_SET set, SCIP_LP lp, BMS_BLKMEM blkmem, SCIP_NODE leaves, int nleaves, SCIP_NODE childs, int nchilds, SCIP_NODE **siblings, int nsiblings)

SCIP_RETCODE	SCIPreoptMergeVarHistory (SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT stat, SCIP_VAR *vars, int nvars)

SCIP_RETCODE	SCIPreoptUpdateVarHistory (SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT stat, BMS_BLKMEM blkmem, SCIP_VAR **vars, int nvars)

void	SCIPreoptnodeInit (SCIP_REOPTNODE reoptnode, SCIP_SET set)

SCIP_RETCODE	SCIPreoptnodeReset (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_REOPTNODE reoptnode)

SCIP_RETCODE	SCIPreoptnodeDelete (SCIP_REOPTNODE *reoptnode, BMS_BLKMEM blkmem)

SCIP_RETCODE	SCIPreoptnodeAddBndchg (SCIP_REOPTNODE reoptnode, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_VAR var, SCIP_Real val, SCIP_BOUNDTYPE boundtype)

SCIP_RETCODE	SCIPreoptnodeAddCons (SCIP_REOPTNODE reoptnode, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_VAR vars, SCIP_Real bounds, SCIP_BOUNDTYPE *boundtypes, SCIP_Real lhs, SCIP_Real rhs, int nvars, REOPT_CONSTYPE constype, SCIP_Bool linear)

void	SCIPreoptnodeGetPath (SCIP_REOPT reopt, SCIP_REOPTNODE reoptnode, SCIP_VAR *vars, SCIP_Real vals, SCIP_BOUNDTYPE boundtypes, int varssize, int nbndchgs, int *nbndchgsafterdual)

SCIP_RETCODE	SCIPreoptAddCons (SCIP_REOPT reopt, SCIP_SET set, BMS_BLKMEM blkmem, SCIP_CONS cons)

SCIP_RETCODE	SCIPreoptSaveGlobalBounds (SCIP_REOPT reopt, SCIP_PROB transprob, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptSaveActiveConss (SCIP_REOPT reopt, SCIP_PROB transprob, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptInstallBounds (SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT stat, SCIP_PROB transprob, SCIP_LP lp, SCIP_BRANCHCAND branchcand, SCIP_EVENTQUEUE eventqueue, SCIP_CLIQUETABLE cliquetable, BMS_BLKMEM *blkmem)

SCIP_RETCODE	SCIPreoptResetActiveConss (SCIP_REOPT reopt, SCIP_SET set, SCIP_STAT *stat)

SCIP_Bool	SCIPreoptConsCanBeDeleted (SCIP_REOPT reopt, SCIP_CONS cons)

Function Documentation

◆ SCIPreoptCreate()

SCIP_RETCODE SCIPreoptCreate	(	SCIP_REOPT **	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem
	)

creates reopt data

constructor for the reoptimization data

Parameters

reopt	pointer to reoptimization data structure
set	global SCIP settings
blkmem	block memory

Definition at line 5000 of file reopt.c.

References BMSallocBlockMemoryArray, BMSallocMemory, BMSallocMemoryArray, createReopttree(), createSolTree(), DEFAULT_MEM_RUN, DEFAULT_RANDSEED, EVENTHDLR_DESC, EVENTHDLR_NAME, FALSE, SCIP_ALLOC, SCIP_CALL, SCIP_CLOCKTYPE_DEFAULT, SCIP_OKAY, SCIPclockCreate(), SCIPeventhdlrCreate(), SCIPrandomCreate(), SCIPsetIncludeEventhdlr(), and SCIPsetInitializeRandomSeed().

Referenced by SCIPenableReoptimization().

◆ SCIPreoptFree()

SCIP_RETCODE SCIPreoptFree	(	SCIP_REOPT **	reopt,
		SCIP_SET *	set,
		SCIP_PRIMAL *	origprimal,
		BMS_BLKMEM *	blkmem
	)

frees reopt data

frees reoptimization data

Parameters

reopt	reoptimization data structure
set	global SCIP settings
origprimal	original primal
blkmem	block memory

Definition at line 5079 of file reopt.c.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeMemory, BMSfreeMemoryArray, freeReoptTree(), freeSolTree(), SCIP_CALL, SCIP_OKAY, SCIP_STAGE_INIT, SCIP_STAGE_PROBLEM, SCIPclockFree(), SCIPconsRelease(), SCIPhashmapFree(), SCIPrandomFree(), and SCIPsolFree().

Referenced by SCIPenableReoptimization(), and SCIPfreeProb().

◆ SCIPreoptGetNAddedConss()

int SCIPreoptGetNAddedConss	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node
	)

returns the number of constraints added by the reoptimization plug-in

Parameters

reopt	reoptimization data structure
node	node of the search tree

Definition at line 5210 of file reopt.c.

References MAX, SCIP_ReoptNode::nconss, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIPnodeGetDepth(), SCIPnodeGetNAddedConss(), and SCIPnodeGetReoptID().

Referenced by SCIPreoptCheckCutoff().

◆ SCIPreoptAddSol()

SCIP_RETCODE SCIPreoptAddSol	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PRIMAL *	origprimal,
		BMS_BLKMEM *	blkmem,
		SCIP_SOL *	sol,
		SCIP_Bool	bestsol,
		SCIP_Bool *	added,
		SCIP_VAR **	vars,
		int	nvars,
		int	run
	)

add a solution to the solution tree

Parameters

reopt	reoptimization data
set	global SCIP settings
stat	dynamic problem statistics
origprimal	original primal
blkmem	block memory
sol	solution to add
bestsol	is the current solution an optimal solution?
added	pointer to store the information if the soltion was added
vars	variable array
nvars	number of variables
run	number of the current run (1,2,...)

Definition at line 5234 of file reopt.c.

References ensureSolsSize(), SCIP_Reopt::noptsolsbyreoptsol, SCIP_SolTree::nsols, SCIP_CALL, SCIP_OKAY, SCIPheurGetName(), SCIPsolGetHeur(), SCIP_SolTree::sols, SCIP_Reopt::soltree, and soltreeAddSol().

Referenced by SCIPsolve().

◆ SCIPreoptAddOptSol()

SCIP_RETCODE SCIPreoptAddOptSol	(	SCIP_REOPT *	reopt,
		SCIP_SOL *	sol,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PRIMAL *	origprimal,
		SCIP_VAR **	vars,
		int	nvars
	)

add optimal solution

we want to store the optimal solution of each run in a separate array

Parameters

reopt	reoptimization data structure
sol	solution to add
blkmem	block memory
set	global SCIP settings
stat	dynamic problem statistics
origprimal	original primal
vars	original problem variables
nvars	number of original problem variables

Definition at line 5287 of file reopt.c.

References SCIP_Reopt::prevbestsols, SCIP_Reopt::run, SCIP_CALL, SCIP_OKAY, SCIPsolCopy(), and separateSolution().

Referenced by SCIPsolve().

◆ SCIPreoptAddRun()

SCIP_RETCODE SCIPreoptAddRun	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_VAR **	origvars,
		int	norigvars,
		int	size
	)

add a run

add a new iteration after changing the objective function

Parameters

reopt	reoptimization data sturcture
set	global SCIP settings
blkmem	block memory
origvars	original problem variables
norigvars	number of original variables
size	number of expected solutions

Definition at line 5322 of file reopt.c.

References BMSallocBlockMemoryArray, ensureRunSize(), FALSE, SCIP_Reopt::objhaschanged, reoptSaveNewObj(), resetStats(), SCIP_Reopt::run, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIP_SolTree::sols, SCIP_SolTree::solssize, and SCIP_Reopt::soltree.

Referenced by prepareReoptimization().

◆ SCIPreoptGetNCheckedSols()

int SCIPreoptGetNCheckedSols ( SCIP_REOPT * reopt )

get the number of checked solutions during the reoptimization process

Parameters

reopt reoptimization data structure

Definition at line 5358 of file reopt.c.

References SCIP_Reopt::ncheckedsols.

◆ SCIPreoptAddNCheckedSols()

void SCIPreoptAddNCheckedSols	(	SCIP_REOPT *	reopt,
		int	ncheckedsols
	)

update the number of checked solutions during the reoptimization process

Parameters

reopt	reoptimization data structure
ncheckedsols	number of updated solutions

Definition at line 5368 of file reopt.c.

References SCIP_Reopt::ncheckedsols.

◆ SCIPreoptGetNImprovingSols()

int SCIPreoptGetNImprovingSols ( SCIP_REOPT * reopt )

get the number of checked solutions during the reoptimization process

Parameters

reopt reoptimization data structure

Definition at line 5379 of file reopt.c.

References SCIP_Reopt::nimprovingsols.

◆ SCIPreoptAddNImprovingSols()

void SCIPreoptAddNImprovingSols	(	SCIP_REOPT *	reopt,
		int	nimprovingsols
	)

update the number of checked solutions during the reoptimization process

Parameters

reopt	reoptimization data structure
nimprovingsols	number of improving solutions

Definition at line 5389 of file reopt.c.

References SCIP_Reopt::nimprovingsols.

◆ SCIPreoptGetNSolsRun()

int SCIPreoptGetNSolsRun	(	SCIP_REOPT *	reopt,
		int	run
	)

returns number of solutions stored in the solution tree of a given run

Parameters

reopt	reoptimization data structure
run	number of the run (1,2,..)

Definition at line 5400 of file reopt.c.

References SCIP_SolTree::nsols, SCIP_SolTree::sols, and SCIP_Reopt::soltree.

◆ SCIPreoptGetNSols()

int SCIPreoptGetNSols ( SCIP_REOPT * reopt )

returns number of all solutions of all runs

Parameters

reopt reoptimization data structure

Definition at line 5415 of file reopt.c.

References SCIP_SolTree::nsols, SCIP_Reopt::run, and SCIP_Reopt::soltree.

◆ SCIPreoptGetSolsRun()

SCIP_RETCODE SCIPreoptGetSolsRun	(	SCIP_REOPT *	reopt,
		int	run,
		SCIP_SOL **	sols,
		int	solssize,
		int *	nsols
	)

return the stored solutions of a given run

Parameters

reopt	reoptimization data structure
run	number of the run (1,2,...)
sols	array of solutions to fill
solssize	length of the array
nsols	pointer to store the number of added solutions

Definition at line 5431 of file reopt.c.

References SCIP_SolTree::nsols, SCIP_OKAY, SCIP_SolNode::sol, SCIP_SolTree::sols, SCIP_Reopt::soltree, TRUE, and SCIP_SolNode::updated.

Referenced by SCIPgetReoptSolsRun().

◆ SCIPreoptGetNSavedSols()

int SCIPreoptGetNSavedSols ( SCIP_REOPT * reopt )

returns the number of saved solutions overall runs

Parameters

reopt reoptimization data structure

Definition at line 5473 of file reopt.c.

References SCIP_SolNode::child, SCIP_SolTree::root, SCIP_Reopt::soltree, and soltreeNInducedSols().

◆ SCIPreoptCheckRestart()

SCIP_RETCODE SCIPreoptCheckRestart	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE *	node,
		SCIP_VAR **	transvars,
		int	ntransvars,
		SCIP_Bool *	restart
	)

Check if the reoptimization process should be (locally) restarted.

First, we check whether the current node is the root node, e.g., node == NULL. In this case, we do not need to calculate the similarity again. We trigger a restart if

the objective function has changed too much, or
the number of stored nodes is exceeded, or
the last n optimal solutions were found by heur_reoptsols (in this case, the stored tree was only needed to prove the optimality and this can probably be done faster by solving from scratch).

If the current node is different to the root node we calculate the local similarity, i.e., exclude all variables that are already fixed at the given node.

check if the reoptimization process should be (locally) restarted.

First, we check whether the current node is the root node, e.g., node == NULL. in this case, we do not need to calculate the similarity again. we trigger a restart if

the objective function has changed too much
the number of stored nodes is exceeded
the last n optimal solutions were found by heur_reoptsols (in this case, the stored tree was only needed to prove the optimality and this can be probably faster by solving from scratch)

If the current node is different to the root node we calculate the local similarity, i.e., exclude all variable that are already fixed by bounding.

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
node	current node of the branch and bound tree (or NULL)
transvars	transformed problem variables
ntransvars	number of transformed problem variables
restart	pointer to store if the reoptimization process should be restarted

Definition at line 5500 of file reopt.c.

References FALSE, SCIP_Reopt::lastrestart, MAX, SCIP_Reopt::noptsolsbyreoptsol, SCIP_ReoptTree::nreoptnodes, reoptCheckLocalRestart(), reoptRestart(), reoptSimilarity(), SCIP_Reopt::reopttree, SCIP_Reopt::run, SCIP_CALL, SCIP_INVALID, SCIP_INVALIDRESULT, SCIP_OKAY, SCIP_Real, SCIPsetDebugMsg, SCIPsetIsFeasLT(), and TRUE.

Referenced by prepareReoptimization(), and SCIPcheckReoptRestart().

◆ SCIPreoptGetSimToPrevious()

SCIP_Real SCIPreoptGetSimToPrevious ( SCIP_REOPT * reopt )

returns the similarity to the previous objective function

returns the similarity to the previous objective function, if no exist return -2.0

Parameters

reopt reoptimization data structure

Definition at line 5569 of file reopt.c.

References SCIP_Reopt::simtolastobj.

Referenced by SCIPgetReoptSimilarity().

◆ SCIPreoptGetSimToFirst()

SCIP_Real SCIPreoptGetSimToFirst ( SCIP_REOPT * reopt )

returns the similarity to the first objective functions

returns the similarity to the first objective different to the zero-function function, if no exist return -2.0

Parameters

reopt reoptimization data structure

Definition at line 5578 of file reopt.c.

References SCIP_Reopt::simtofirstobj.

◆ SCIPreoptGetSimilarity()

SCIP_Real SCIPreoptGetSimilarity	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		int	run1,
		int	run2,
		SCIP_VAR **	origvars,
		int	norigvars
	)

return the similarity between two of objective functions of two given runs

Parameters

reopt	reoptimization data structure
set	global SCIP settings
run1	number of the first run
run2	number of the second run
origvars	original problem variables
norigvars	number of original problem variables

Definition at line 5587 of file reopt.c.

References reoptSimilarity().

Referenced by SCIPgetReoptSimilarity().

◆ SCIPreoptGetLastBestSol()

SCIP_SOL* SCIPreoptGetLastBestSol ( SCIP_REOPT * reopt )

returns the best solution of the last run

Parameters

reopt reoptimization data structure

Definition at line 5606 of file reopt.c.

References SCIP_Reopt::prevbestsols, and SCIP_Reopt::run.

Referenced by SCIPgetReoptLastOptSol().

◆ SCIPreoptGetReoptnode()

SCIP_REOPTNODE* SCIPreoptGetReoptnode	(	SCIP_REOPT *	reopt,
		unsigned int	id
	)

returns the node of the reoptimization tree corresponding to the unique id

Parameters

reopt	reoptimization data structure
id	unique id

Definition at line 5620 of file reopt.c.

References SCIP_ReoptTree::reoptnodes, and SCIP_Reopt::reopttree.

Referenced by SCIPgetReoptnode().

◆ SCIPreoptGetOldObjCoef()

SCIP_Real SCIPreoptGetOldObjCoef	(	SCIP_REOPT *	reopt,
		int	run,
		int	idx
	)

returns the coefficent of variable with index idx in run run

returns the coefficient of variable with index idx in run run

Parameters

reopt	reoptimization data structure
run	number of the run (1,2,...)
idx	index of original variable

Definition at line 5634 of file reopt.c.

References SCIP_Reopt::objs.

Referenced by reoptCheckLocalRestart(), and SCIPgetReoptOldObjCoef().

◆ SCIPreoptGetBestSolRun()

SCIP_SOL* SCIPreoptGetBestSolRun	(	SCIP_REOPT *	reopt,
		int	run
	)

return the best solution of a given run

Note: the returned solution is part of the original space.

return the best solution of a given run.

Note: the returned solution is part of the original space.

Parameters

reopt	reoptimization data structure
run	number of the run (1,2,...)

Definition at line 5650 of file reopt.c.

References SCIP_Reopt::prevbestsols.

◆ SCIPreoptReset()

SCIP_RETCODE SCIPreoptReset	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem
	)

reset solving specific paramters

reset solving specific parameters

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory

Definition at line 5662 of file reopt.c.

References SCIP_Reopt::addedconss, SCIP_Reopt::consadded, FALSE, SCIP_Reopt::naddedconss, SCIP_Reopt::objhaschanged, SCIP_CALL, SCIP_OKAY, and SCIPconsRelease().

Referenced by freeReoptSolve(), and freeTransform().

◆ SCIPreoptResetSolMarks()

void SCIPreoptResetSolMarks ( SCIP_REOPT * reopt )

reset marks of stored solutions to not updated

Parameters

reopt reoptimization data structure

Definition at line 5694 of file reopt.c.

References SCIP_SolNode::child, SCIP_SolTree::root, SCIP_SolNode::sibling, SCIP_Reopt::soltree, and soltreeResetMarks().

Referenced by SCIPresetReoptSolMarks().

◆ SCIPreoptGetNNodes()

int SCIPreoptGetNNodes	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node
	)

returns the number of stored nodes

returns the number of stored nodes in the subtree induced by node

Parameters

reopt	reoptimization data structure
node	node of the search tree

Definition at line 5715 of file reopt.c.

References SCIP_ReoptTree::nreoptnodes, SCIP_Reopt::reopttree, reopttreeGetNNodes(), SCIPnodeGetDepth(), and SCIPnodeGetReoptID().

Referenced by compressReoptTree(), and SCIPgetNReoptnodes().

◆ SCIPreoptAddInfNode()

SCIP_RETCODE SCIPreoptAddInfNode	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE *	node
	)

save information that given node is infeasible

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
node	node of the search tree

Definition at line 5902 of file reopt.c.

References SCIP_ReoptTree::ninfnodes, SCIP_ReoptTree::ntotalinfnodes, REOPT_CONSTYPE_CUT, SCIP_Reopt::reopttree, saveGlobalCons(), SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPreoptCheckCutoff().

◆ SCIPreoptCheckCutoff()

SCIP_RETCODE SCIPreoptCheckCutoff	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE *	node,
		SCIP_EVENTTYPE	eventtype,
		SCIP_LP *	lp,
		SCIP_LPSOLSTAT	lpsolstat,
		SCIP_Bool	isrootnode,
		SCIP_Bool	isfocusnode,
		SCIP_Real	lowerbound,
		int	effectiverootdepth
	)

check the reason for cut off a node and if necessary store the node

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
node	node of the search tree
eventtype	eventtype
lp	LP data
lpsolstat	solution status of the LP
isrootnode	the node is the root
isfocusnode	the node is the current focus node
lowerbound	lower bound of the node
effectiverootdepth	effective root depth

Definition at line 5926 of file reopt.c.

References addNode(), SCIP_Reopt::currentnode, deleteLastDualBndchgs(), SCIP_Reopt::dualreds, FALSE, SCIP_Reopt::lastbranched, SCIP_Reopt::lastseennode, REOPT_CONSTYPE_DUALREDS, REOPT_CONSTYPE_INFSUBTREE, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_FORMAT, SCIP_EVENTTYPE_NODEBRANCHED, SCIP_EVENTTYPE_NODEFEASIBLE, SCIP_EVENTTYPE_NODEINFEASIBLE, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_NODETYPE_PROBINGNODE, SCIP_OKAY, SCIP_Real, SCIP_REOPTTYPE_FEASIBLE, SCIP_REOPTTYPE_INFSUBTREE, SCIP_REOPTTYPE_LOGICORNODE, SCIP_REOPTTYPE_PRUNED, SCIP_REOPTTYPE_STRBRANCHED, SCIP_REOPTTYPE_TRANSIT, SCIPlpGetCutoffbound(), SCIPlpGetSolstat(), SCIPnodeGetDepth(), SCIPnodeGetNDualBndchgs(), SCIPnodeGetNumber(), SCIPnodeGetType(), SCIPreoptAddDualBndchg(), SCIPreoptAddInfNode(), SCIPreoptGetNAddedConss(), SCIPreoptGetNDualBndchgs(), SCIPreoptResetDualBndchgs(), SCIPsetDebugMsg, and TRUE.

Referenced by nodeToLeaf(), SCIPnodeCutoff(), SCIPnodeFocus(), SCIPnodepqBound(), SCIPsolveCIP(), SCIPtreeCutoff(), and solveNodeLP().

◆ SCIPreoptAddDualBndchg()

SCIP_RETCODE SCIPreoptAddDualBndchg	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE *	node,
		SCIP_VAR *	var,
		SCIP_Real	newval,
		SCIP_Real	oldval
	)

store bound change based on dual information

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
node	node of the search tree
var	variable
newval	new bound
oldval	old bound

Definition at line 6195 of file reopt.c.

References checkMemDualCons(), SCIP_Reopt::currentnode, DEFAULT_MEM_DUALCONS, SCIP_Reopt::dualreds, FALSE, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPnodeGetNumber(), SCIPsetDebugMsg, SCIPsetFindBranchrule(), SCIPsetGetIntParam(), SCIPsetIsEQ(), SCIPsetIsLT(), SCIPvarGetName(), SCIPvarGetOrigvarSum(), and SCIPvarIsOriginal().

Referenced by SCIPaddReoptDualBndchg(), and SCIPreoptCheckCutoff().

◆ SCIPreoptGetNDualBndchgs()

int SCIPreoptGetNDualBndchgs	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node
	)

returns the number of bound changes based on dual information

Parameters

reopt	reoptimization data structure
node	node of the search tree

Definition at line 6285 of file reopt.c.

References SCIP_Reopt::currentnode, SCIP_Reopt::dualreds, and SCIPnodeGetNumber().

Referenced by SCIPreoptCheckCutoff().

◆ SCIPreoptGetNLeaves()

int SCIPreoptGetNLeaves	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node
	)

returns the number of leaf nodes of the subtree induced by node (of the whole tree if node == NULL)

Parameters

reopt	reoptimization data structure
node	node of the search tree (or NULL)

Definition at line 5867 of file reopt.c.

References SCIP_ReoptNode::childids, SCIP_ReoptNode::nchilds, reoptGetNLeaves(), SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIPnodeGetDepth(), and SCIPnodeGetReoptID().

Referenced by SCIPcomprExec(), and SCIPgetNReoptLeaves().

◆ SCIPreoptGetChildIDs()

SCIP_RETCODE SCIPreoptGetChildIDs	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE *	node,
		unsigned int *	childs,
		int	childssize,
		int *	nchilds
	)

returns the child nodes of node that need to be reoptimized next or NULL if node is a leaf

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
node	node of the search tree
childs	array to store the child ids
childssize	size of the childs array
nchilds	pointer to store the number of child nodes

Definition at line 6305 of file reopt.c.

References SCIP_ReoptNode::childids, dryBranch(), SCIP_ReoptNode::nchilds, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPnodeGetDepth(), SCIPnodeGetReoptID(), and TRUE.

Referenced by SCIPgetReoptChildIDs().

◆ SCIPreoptGetLeaves()

SCIP_RETCODE SCIPreoptGetLeaves	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node,
		unsigned int *	leaves,
		int	leavessize,
		int *	nleaves
	)

returns all leaves of the subtree induced by node

Parameters

reopt	reoptimization data
node	node of the search tree
leaves	array to the the ids
leavessize	size of leaves array
nleaves	pointer to store the number of leave node

Definition at line 6358 of file reopt.c.

References SCIP_ReoptNode::childids, SCIP_ReoptNode::nchilds, reoptGetLeaves(), SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIP_CALL, SCIP_OKAY, and SCIPnodeGetReoptID().

Referenced by SCIPgetReoptLeaveIDs().

◆ SCIPreoptGetSavingtime()

SCIP_Real SCIPreoptGetSavingtime ( SCIP_REOPT * reopt )

returns the time needed to store the nodes for reoptimization

Parameters

reopt reoptimization data structure

Definition at line 7555 of file reopt.c.

References SCIP_Reopt::savingtime, and SCIPclockGetTime().

Referenced by SCIPprintReoptStatistics().

◆ SCIPreoptAddGlbCons()

SCIP_RETCODE SCIPreoptAddGlbCons	(	SCIP_REOPT *	reopt,
		SCIP_VAR **	vars,
		SCIP_Real *	vals,
		int	nvars,
		BMS_BLKMEM *	blkmem
	)

store a global constraint that should be added at the beginning of the next iteration

Parameters

reopt	reoptimization data
vars	array to store the variables of the constraint
vals	array to store the coefficients of the variables
nvars	pointer to store the size of the constraints
blkmem	block memory

◆ SCIPreoptApplyGlbConss()

SCIP_RETCODE SCIPreoptApplyGlbConss	(	SCIP *	scip,
		SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		BMS_BLKMEM *	blkmem
	)

add the stored constraints globally to the problem

Parameters

scip	SCIP data structure
reopt	reoptimization data structure
set	global SCIP settings
stat	dynamic problem statistics
blkmem	block memory

Definition at line 7565 of file reopt.c.

References SCIP_Reopt::activeconss, FALSE, SCIP_Reopt::glbconss, SCIP_Reopt::nglbconss, REOPT_CONSTYPE_CUT, SCIP_Reopt::run, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_INVALIDDATA, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPaddCons(), SCIPallocBufferArray, SCIPcreateConsBasicBounddisjunction(), SCIPcreateConsLogicor(), SCIPdebugPrintCons, SCIPerrorMessage, SCIPfreeBufferArray, SCIPhashmapExists(), SCIPhashmapInsert(), SCIPreleaseCons(), SCIPsetDebugMsg, SCIPsetIsFeasEQ(), SCIPsnprintf(), SCIPvarGetName(), SCIPvarGetType(), SCIPvarIsOriginal(), SCIPvarNegate(), and TRUE.

Referenced by prepareReoptimization().

◆ SCIPreoptApplyCuts()

SCIP_RETCODE SCIPreoptApplyCuts	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node,
		SCIP_SEPASTORE *	sepastore,
		SCIP_CUTPOOL *	cutpool,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_EVENTFILTER *	eventfilter,
		SCIP_LP *	lp,
		SCIP_Bool	root
	)

add the stored cuts to the separation storage

Parameters

reopt	reoptimization data structure
node	current focus node
sepastore	separation storage
cutpool	global cutpool
blkmem	block memory
set	global SCIP settings
stat	dynamic problem statistics
eventqueue	event queue
eventfilter	event filter
lp	current LP
root	bool whether the current node is the root

Definition at line 7686 of file reopt.c.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeBlockMemoryArrayNull, SCIP_ReoptNode::conss, FALSE, SCIP_ReoptNode::nconss, REOPT_CONSTYPE_CUT, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_ROWORIGINTYPE_REOPT, SCIP_VARSTATUS_COLUMN, SCIPcutpoolAddRow(), SCIPnodeGetDepth(), SCIPnodeGetNumber(), SCIPnodeGetReoptID(), SCIProwCreate(), SCIProwRelease(), SCIPsepastoreAddCut(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsnprintf(), SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarGetTransVar(), SCIPvarIsOriginal(), and TRUE.

Referenced by SCIPinitConssLP().

◆ SCIPreoptGetSolveLP()

SCIP_Bool SCIPreoptGetSolveLP	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_NODE *	node
	)

check if the LP of the given node should be solved or not

Parameters

reopt	reoptimization data structure
set	global SCIP settings
node	node of the current search tree

Definition at line 7819 of file reopt.c.

References FALSE, SCIP_ReoptNode::nchilds, SCIP_ReoptNode::nvars, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIPnodeGetDepth(), SCIPnodeGetReoptID(), SCIPnodeGetReopttype(), SCIPsetIsGE(), SCIP_Reopt::simtolastobj, and TRUE.

Referenced by solveNode().

◆ SCIPreoptApply()

SCIP_RETCODE SCIPreoptApply	(	SCIP_REOPT *	reopt,
		SCIP *	scip,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	transprob,
		SCIP_PROB *	origprob,
		SCIP_TREE *	tree,
		SCIP_LP *	lp,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_CLIQUETABLE *	cliquetable,
		BMS_BLKMEM *	blkmem,
		SCIP_REOPTNODE *	reoptnode,
		unsigned int	id,
		SCIP_Real	estimate,
		SCIP_NODE **	childnodes,
		int *	ncreatedchilds,
		int *	naddedconss,
		int	childnodessize,
		SCIP_Bool *	success
	)

reactivate the given reoptnode and split them into several nodes if necessary

Parameters

reopt	reoptimization data structure
scip	SCIP data structure
set	global SCIP settings
stat	dynamic problem statistics
transprob	transformed problem
origprob	original problem
tree	branching tree
lp	current LP
branchcand	branching candidate
eventqueue	event queue
cliquetable	clique table
blkmem	block memory
reoptnode	node of the reoptimization tree to reactivate
id	id of the node to reactivate
estimate	estimate of the child nodes that should be created
childnodes	array to store the created child nodes
ncreatedchilds	pointer to store number of created child nodes
naddedconss	pointer to store number of generated constraints
childnodessize	available size of childnodes array
success	pointer store the result

Definition at line 7251 of file reopt.c.

References addLocalConss(), addNode(), addSplitcons(), changeAncestorBranchings(), SCIP_ReoptNode::dualreds, SCIP_ReoptNode::dualredscur, FALSE, fixBounds(), fixInterdiction(), getInferenceOrder(), SCIP_ReoptNode::lowerbound, SCIP_ReoptNode::nafterdualvars, SCIP_ReoptNode::nconss, SCIP_Reopt::objhaschanged, SCIP_Reopt::randnumgen, REOPT_CONSTYPE_DUALREDS, REOPT_CONSTYPE_INFSUBTREE, SCIP_ReoptTree::reoptnodes, reoptnodeUpdateDualConss(), SCIP_Reopt::reopttree, SCIP_ReoptNode::reopttype, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIP_REOPTTYPE_INFSUBTREE, SCIP_REOPTTYPE_LOGICORNODE, SCIP_REOPTTYPE_NONE, SCIP_REOPTTYPE_STRBRANCHED, SCIP_REOPTTYPE_TRANSIT, SCIPnodeCreateChild(), SCIPnodeGetNumber(), SCIPnodeSetEstimate(), SCIPnodeSetReoptID(), SCIPnodeSetReopttype(), SCIPrandomPermuteIntArray(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsGT(), and TRUE.

Referenced by SCIPapplyReopt().

◆ SCIPreoptDeleteNode()

SCIP_RETCODE SCIPreoptDeleteNode	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		unsigned int	id,
		BMS_BLKMEM *	blkmem
	)

delete a node stored in the reoptimization tree

Parameters

reopt	reoptimization data structure
set	global SCIP settings
id	id of a stored node
blkmem	block memory

Definition at line 7231 of file reopt.c.

References SCIP_ReoptTree::openids, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, reopttreeDeleteNode(), SCIP_CALL, SCIP_OKAY, SCIPqueueInsert(), and TRUE.

◆ SCIPreoptResetDualBndchgs()

SCIP_RETCODE SCIPreoptResetDualBndchgs	(	SCIP_REOPT *	reopt,
		SCIP_NODE *	node,
		BMS_BLKMEM *	blkmem
	)

reset the stored information abound bound changes based on dual information

Parameters

reopt	reoptimization data structure
node	node of the search tree
blkmem	block memory

Definition at line 7147 of file reopt.c.

References reoptnodeResetDualConss(), SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIP_CALL, SCIP_OKAY, SCIPnodeGetDepth(), and SCIPnodeGetReoptID().

Referenced by addNode(), SCIPreoptCheckCutoff(), and SCIPresetReoptnodeDualcons().

◆ SCIPreoptSplitRoot()

SCIP_RETCODE SCIPreoptSplitRoot	(	SCIP_REOPT *	reopt,
		SCIP_TREE *	tree,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		BMS_BLKMEM *	blkmem,
		int *	ncreatedchilds,
		int *	naddedconss
	)

splits the root into several nodes and moves the child nodes of the root to one of the created nodes

Parameters

reopt	reoptimization data structure
tree	branch and bound tree
set	global SCIP settings
stat	dynamic SCIP statistics
blkmem	block memory
ncreatedchilds	pointer to store the number of created nodes
naddedconss	pointer to store the number added constraints

Definition at line 6853 of file reopt.c.

References BMSallocBlockMemory, SCIP_ReoptNode::conss, createReoptnode(), SCIP_ReoptNode::dualredscur, getInferenceOrder(), SCIP_ReoptNode::nchilds, SCIP_ReoptNode::nconss, SCIP_ReoptNode::nvars, SCIP_ReoptTree::openids, SCIP_ReoptNode::parentID, SCIP_Reopt::randnumgen, reoptAddChild(), reoptMoveIDs(), reoptnodeCheckMemory(), SCIP_ReoptTree::reoptnodes, SCIP_ReoptTree::reoptnodessize, reoptnodeUpdateDualConss(), SCIP_Reopt::reopttree, reopttreeCheckMemory(), SCIP_ReoptNode::reopttype, SCIP_ALLOC, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIP_REOPTTYPE_LOGICORNODE, SCIP_REOPTTYPE_STRBRANCHED, SCIP_REOPTTYPE_TRANSIT, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPerrorMessage, SCIPnodeSetReopttype(), SCIPqueueRemove(), SCIPrandomPermuteIntArray(), SCIPsetAllocBufferArray, SCIPsetFreeBufferArray, SCIPtreeGetRootNode(), SCIPvarGetType(), transformDualredsToBounddisjunction(), transformDualredsToLinear(), SCIP_ReoptNode::varbounds, SCIP_ReoptNode::varboundtypes, and SCIP_ReoptNode::vars.

Referenced by SCIPsplitReoptRoot().

◆ SCIPreoptApplyCompression()

SCIP_RETCODE SCIPreoptApplyCompression	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_REOPTNODE **	representatives,
		int	nrepresentatives,
		SCIP_Bool *	success
	)

reset the complete tree and set the given search frontier

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
representatives	array of representatives
nrepresentatives	number of representatives
success	pointer to store if the method was successful

Definition at line 6626 of file reopt.c.

References SCIP_ReoptNode::conss, createReoptnode(), FALSE, SCIP_ReoptNode::nchilds, SCIP_ReoptNode::nconss, SCIP_ReoptTree::nreoptnodes, SCIP_ReoptNode::nvars, SCIP_ReoptTree::openids, SCIP_ReoptNode::parentID, reoptAddChild(), SCIP_ReoptTree::reoptnodes, reoptResetTree(), SCIP_Reopt::reopttree, SCIP_ReoptNode::reopttype, SCIP_CALL, SCIP_OKAY, SCIP_REOPTTYPE_LEAF, SCIP_REOPTTYPE_LOGICORNODE, SCIP_REOPTTYPE_TRANSIT, SCIPqueueRemove(), SCIPreoptnodeAddBndchg(), SCIPreoptnodeAddCons(), SCIPsetDebugMsg, TRUE, SCIP_ReoptNode::varbounds, SCIP_ReoptNode::varboundtypes, SCIP_ReoptNode::vars, and SCIP_ReoptNode::varssize.

Referenced by SCIPsetReoptCompression().

◆ SCIPreoptSaveOpenNodes()

SCIP_RETCODE SCIPreoptSaveOpenNodes	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_LP *	lp,
		BMS_BLKMEM *	blkmem,
		SCIP_NODE **	leaves,
		int	nleaves,
		SCIP_NODE **	childs,
		int	nchilds,
		SCIP_NODE **	siblings,
		int	nsiblings
	)

add all unprocessed nodes to the reoptimization tree

Parameters

reopt	reoptimization data structure
set	global SCIP settings
lp	current LP
blkmem	block memory
leaves	array of open leave nodes
nleaves	number of open leave nodes
childs	array of open children nodes
nchilds	number of open leave nodes
siblings	array of open sibling nodes
nsiblings	number of open leave nodes

Definition at line 6422 of file reopt.c.

References addNode(), FALSE, SCIP_CALL, SCIP_OKAY, SCIP_REOPTTYPE_PRUNED, SCIPnodeGetLowerbound(), and SCIPsetDebugMsg.

Referenced by SCIPsolve().

◆ SCIPreoptMergeVarHistory()

SCIP_RETCODE SCIPreoptMergeVarHistory	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_VAR **	vars,
		int	nvars
	)

merges the variable history of the current run with the stored history

Parameters

reopt	reoptimization data structure
set	global SCIP settings
stat	dynamic problem statistics
vars	original problem variables
nvars	number of original problem variables

Definition at line 6474 of file reopt.c.

References SCIP_Var::history, SCIP_Reopt::objhaschanged, SCIP_History::pscostcount, SCIP_History::pscostvariance, SCIP_History::pscostweightedmean, reoptSimilarity(), SCIP_Reopt::run, SCIP_INVALID, SCIP_INVALIDRESULT, SCIP_OKAY, SCIP_Real, SCIP_VERBLEVEL_NORMAL, SCIPhistoryGetAvgCutoffs(), SCIPhistoryGetAvgInferences(), SCIPhistoryIncCutoffSum(), SCIPhistoryIncInferenceSum(), SCIPhistoryIncNBranchings(), SCIPsetDebugMsg, SCIPsetIsGT(), SCIPsetIsZero(), SCIPvarGetIndex(), SCIPvarGetName(), SCIPvarGetTransVar(), SCIPvarIsActive(), SCIPvarIsOriginal(), SCIPverbMessage(), SCIP_Reopt::simtolastobj, and SCIP_Reopt::varhistory.

Referenced by prepareReoptimization().

◆ SCIPreoptUpdateVarHistory()

SCIP_RETCODE SCIPreoptUpdateVarHistory	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		BMS_BLKMEM *	blkmem,
		SCIP_VAR **	vars,
		int	nvars
	)

updates the variable history

Parameters

reopt	reoptimization data structure
set	global SCIP settings
stat	dynamic problem statistics
blkmem	block memory
vars	original variable array
nvars	number of original variables

Definition at line 6569 of file reopt.c.

References BMSallocBlockMemoryArray, FALSE, SCIP_Var::history, SCIP_Reopt::run, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPhistoryCreate(), SCIPhistoryReset(), SCIPhistoryUnite(), SCIPsetDebugMsg, SCIPvarGetIndex(), SCIPvarGetTransVar(), SCIPvarIsActive(), SCIPvarIsOriginal(), and SCIP_Reopt::varhistory.

Referenced by SCIPsolve().

◆ SCIPreoptnodeInit()

void SCIPreoptnodeInit	(	SCIP_REOPTNODE *	reoptnode,
		SCIP_SET *	set
	)

initialize an empty node

Parameters

reoptnode	node of the reopttree
set	global SCIP settings

Definition at line 7866 of file reopt.c.

References SCIP_ReoptNode::afterdualvarbounds, SCIP_ReoptNode::afterdualvarboundtypes, SCIP_ReoptNode::afterdualvars, SCIP_ReoptNode::afterdualvarssize, SCIP_ReoptNode::allocchildmem, SCIP_ReoptNode::childids, SCIP_ReoptNode::conss, SCIP_ReoptNode::consssize, SCIP_ReoptNode::dualreds, SCIP_ReoptNode::dualredscur, SCIP_ReoptNode::dualredsnex, FALSE, SCIP_ReoptNode::lowerbound, SCIP_ReoptNode::nafterdualvars, SCIP_ReoptNode::nchilds, SCIP_ReoptNode::nconss, SCIP_ReoptNode::nvars, SCIP_ReoptNode::parentID, SCIP_ReoptNode::reopttype, SCIP_REOPTTYPE_NONE, SCIPsetInfinity(), SCIP_ReoptNode::varbounds, SCIP_ReoptNode::varboundtypes, SCIP_ReoptNode::vars, and SCIP_ReoptNode::varssize.

Referenced by SCIPinitRepresentation().

◆ SCIPreoptnodeReset()

SCIP_RETCODE SCIPreoptnodeReset	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_REOPTNODE *	reoptnode
	)

reset the given reoptimization node

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
reoptnode	reoptimization node

Definition at line 7899 of file reopt.c.

References reoptnodeReset(), SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPresetRepresentation().

◆ SCIPreoptnodeDelete()

SCIP_RETCODE SCIPreoptnodeDelete	(	SCIP_REOPTNODE **	reoptnode,
		BMS_BLKMEM *	blkmem
	)

delete the given reoptimization node

Parameters

reoptnode	pointer of reoptnode
blkmem	block memory

Definition at line 7917 of file reopt.c.

References reoptnodeDelete(), SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPdeleteReoptnode(), and SCIPfreeRepresentation().

◆ SCIPreoptnodeAddBndchg()

SCIP_RETCODE SCIPreoptnodeAddBndchg	(	SCIP_REOPTNODE *	reoptnode,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_VAR *	var,
		SCIP_Real	val,
		SCIP_BOUNDTYPE	boundtype
	)

add a variable to a given reoptnode

Parameters

reoptnode	node of the reopttree
set	global SCIP settings
blkmem	block memory
var	variable to add
val	value of the variable
boundtype	boundtype of the variable

Definition at line 7931 of file reopt.c.

References SCIP_ReoptNode::nvars, reoptnodeCheckMemory(), SCIP_CALL, SCIP_OKAY, SCIP_ReoptNode::varbounds, SCIP_ReoptNode::varboundtypes, and SCIP_ReoptNode::vars.

Referenced by SCIPaddReoptnodeBndchg(), SCIPreoptApplyCompression(), and SCIPreoptnodeAddCons().

◆ SCIPreoptnodeAddCons()

SCIP_RETCODE SCIPreoptnodeAddCons	(	SCIP_REOPTNODE *	reoptnode,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_VAR **	vars,
		SCIP_Real *	bounds,
		SCIP_BOUNDTYPE *	boundtypes,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		int	nvars,
		REOPT_CONSTYPE	constype,
		SCIP_Bool	linear
	)

add a constraint to a given reoptnode

Parameters

reoptnode	node of the reopttree
set	global SCIP settings
blkmem	block memory
vars	variables which are part of the constraint
bounds	bounds of the variables
boundtypes	boundtypes of the variables (or NULL is the constraint is a cut)
lhs	lhs of the constraint
rhs	rhs of the constraint
nvars	number of variables
constype	type of the constraint
linear	the given constraint has a linear representation

Definition at line 7959 of file reopt.c.

References BMSallocBlockMemory, BMSduplicateBlockMemoryArray, SCIP_ReoptNode::conss, SCIP_ReoptNode::nconss, REOPT_CONSTYPE_CUT, REOPT_CONSTYPE_DUALREDS, REOPT_CONSTYPE_INFSUBTREE, reoptnodeCheckMemory(), SCIP_ALLOC, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_INTEGER, SCIPreoptnodeAddBndchg(), SCIPsetDebugMsg, SCIPsetIsGE(), SCIPsetIsLE(), SCIPvarGetLbLocal(), SCIPvarGetType(), and SCIPvarGetUbLocal().

Referenced by SCIPaddReoptnodeCons(), SCIPreoptApplyCompression(), and storeCuts().

◆ SCIPreoptnodeGetPath()

void SCIPreoptnodeGetPath	(	SCIP_REOPT *	reopt,
		SCIP_REOPTNODE *	reoptnode,
		SCIP_VAR **	vars,
		SCIP_Real *	vals,
		SCIP_BOUNDTYPE *	boundtypes,
		int	varssize,
		int *	nbndchgs,
		int *	nbndchgsafterdual
	)

return the branching path of the given node in the reoptimization tree

return the branching path stored of the given node in the reoptimization tree

Parameters

reopt	reoptimization data structure
reoptnode	node of the reoptimization tree
vars	array for variables
vals	array for values
boundtypes	array for bound types
varssize	size of arrays vars, vals, and boundtypes
nbndchgs	pointer to store the number of bound changes
nbndchgsafterdual	pointer to store the number of bound changes applied after the first dual reduction at the given node

Definition at line 7172 of file reopt.c.

References SCIP_ReoptNode::afterdualvarbounds, SCIP_ReoptNode::afterdualvarboundtypes, SCIP_ReoptNode::afterdualvars, SCIP_ReoptNode::nafterdualvars, SCIP_ReoptNode::nvars, SCIP_ReoptNode::parentID, SCIP_ReoptTree::reoptnodes, SCIP_Reopt::reopttree, SCIPreoptnodeGetPath(), SCIP_ReoptNode::varbounds, SCIP_ReoptNode::varboundtypes, and SCIP_ReoptNode::vars.

Referenced by SCIPgetReoptnodePath(), and SCIPreoptnodeGetPath().

◆ SCIPreoptAddCons()

SCIP_RETCODE SCIPreoptAddCons	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		BMS_BLKMEM *	blkmem,
		SCIP_CONS *	cons
	)

add a constraint to the reoptimization data structure

Parameters

reopt	reoptimization data structure
set	global SCIP settings
blkmem	block memory
cons	constraint to add

Definition at line 8050 of file reopt.c.

References SCIP_Reopt::addedconss, SCIP_Reopt::addedconsssize, BMSallocClearBlockMemoryArray, BMSclearMemoryArray, BMSreallocBlockMemoryArray, SCIP_Reopt::consadded, SCIP_Reopt::naddedconss, SCIP_ALLOC, SCIP_OKAY, SCIPconsCapture(), SCIPsetCalcMemGrowSize(), and TRUE.

Referenced by SCIPaddCons().

◆ SCIPreoptSaveGlobalBounds()

SCIP_RETCODE SCIPreoptSaveGlobalBounds	(	SCIP_REOPT *	reopt,
		SCIP_PROB *	transprob,
		BMS_BLKMEM *	blkmem
	)

save global lower and upper bounds

Note: this method can only called once, i.e., after fishing presolving of the first problem

save global lower and upper bounds

Note: this method should only be called once, i.e., after fishing presolving of the first problem

Parameters

reopt	reoptimization data structure
transprob	transformed problem data
blkmem	block memory

Definition at line 8097 of file reopt.c.

References SCIP_Reopt::glblb, SCIP_Reopt::glbub, SCIP_CALL, SCIP_OKAY, SCIPhashmapCreate(), SCIPhashmapExists(), SCIPhashmapInsertReal(), SCIPprobGetNVars(), SCIPprobGetVars(), SCIPvarGetLbGlobal(), and SCIPvarGetUbGlobal().

Referenced by prepareReoptimization().

◆ SCIPreoptSaveActiveConss()

SCIP_RETCODE SCIPreoptSaveActiveConss	(	SCIP_REOPT *	reopt,
		SCIP_PROB *	transprob,
		BMS_BLKMEM *	blkmem
	)

save active constraints

Note: this method can only called once, i.e., after fishing presolving of the first problem

Parameters

reopt	reoptimization data structure
transprob	transformed problem data
blkmem	block memory

Definition at line 8135 of file reopt.c.

References SCIP_Reopt::activeconss, SCIP_Prob::conss, SCIP_Prob::nconss, SCIP_CALL, SCIP_OKAY, SCIPconsIsActive(), SCIPhashmapCreate(), SCIPhashmapExists(), and SCIPhashmapInsert().

Referenced by prepareReoptimization().

◆ SCIPreoptInstallBounds()

SCIP_RETCODE SCIPreoptInstallBounds	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PROB *	transprob,
		SCIP_LP *	lp,
		SCIP_BRANCHCAND *	branchcand,
		SCIP_EVENTQUEUE *	eventqueue,
		SCIP_CLIQUETABLE *	cliquetable,
		BMS_BLKMEM *	blkmem
	)

installs global lower and upper bounds

Parameters

reopt	reoptimization data structure
set	global SCIP settings
stat	dynamic SCIP statistics
transprob	transformed problem data
lp	current LP data
branchcand	branching candidate storage
eventqueue	event queue
cliquetable	clique table data structure
blkmem	block memory

Definition at line 8167 of file reopt.c.

References SCIP_Reopt::glblb, SCIP_Reopt::glbub, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIPhashmapExists(), SCIPhashmapGetImageReal(), SCIPprobGetNVars(), SCIPprobGetVars(), SCIPprobIsTransformed(), SCIPvarChgLbGlobal(), SCIPvarChgLbLocal(), SCIPvarChgUbGlobal(), and SCIPvarChgUbLocal().

Referenced by prepareReoptimization().

◆ SCIPreoptResetActiveConss()

SCIP_RETCODE SCIPreoptResetActiveConss	(	SCIP_REOPT *	reopt,
		SCIP_SET *	set,
		SCIP_STAT *	stat
	)

reactivate globally valid constraints that were deactivated and necessary to ensure correctness

Parameters

reopt	reoptimization data structure
set	global SCIP settings
stat	dynamic SCIP statistics

Definition at line 8217 of file reopt.c.

References SCIP_Reopt::activeconss, SCIP_CALL, SCIP_OKAY, SCIPconsActivate(), SCIPconsDeactivate(), SCIPconsIsActive(), SCIPconsIsDeleted(), SCIPhashmapEntryGetImage(), SCIPhashmapGetEntry(), SCIPhashmapGetNEntries(), and TRUE.

Referenced by prepareReoptimization().

◆ SCIPreoptConsCanBeDeleted()

SCIP_Bool SCIPreoptConsCanBeDeleted	(	SCIP_REOPT *	reopt,
		SCIP_CONS *	cons
	)

returns whether a constraint is necessary to ensure correctness and cannot be deleted

Parameters

reopt	reoptimization data structure
cons	problem constraint

Definition at line 8258 of file reopt.c.

References SCIP_Reopt::activeconss, SCIPhashmapExists(), and TRUE.

Referenced by SCIPconsDelete().

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIPreoptCreate()

◆ SCIPreoptFree()

◆ SCIPreoptGetNAddedConss()

◆ SCIPreoptAddSol()

◆ SCIPreoptAddOptSol()

◆ SCIPreoptAddRun()

◆ SCIPreoptGetNCheckedSols()

◆ SCIPreoptAddNCheckedSols()

◆ SCIPreoptGetNImprovingSols()

◆ SCIPreoptAddNImprovingSols()

◆ SCIPreoptGetNSolsRun()

◆ SCIPreoptGetNSols()

◆ SCIPreoptGetSolsRun()

◆ SCIPreoptGetNSavedSols()

◆ SCIPreoptCheckRestart()

◆ SCIPreoptGetSimToPrevious()

◆ SCIPreoptGetSimToFirst()

◆ SCIPreoptGetSimilarity()

◆ SCIPreoptGetLastBestSol()

◆ SCIPreoptGetReoptnode()

◆ SCIPreoptGetOldObjCoef()

◆ SCIPreoptGetBestSolRun()

◆ SCIPreoptReset()

◆ SCIPreoptResetSolMarks()

◆ SCIPreoptGetNNodes()

◆ SCIPreoptAddInfNode()

◆ SCIPreoptCheckCutoff()

◆ SCIPreoptAddDualBndchg()

◆ SCIPreoptGetNDualBndchgs()

◆ SCIPreoptGetNLeaves()

◆ SCIPreoptGetChildIDs()

◆ SCIPreoptGetLeaves()

◆ SCIPreoptGetSavingtime()

◆ SCIPreoptAddGlbCons()

◆ SCIPreoptApplyGlbConss()

◆ SCIPreoptApplyCuts()

◆ SCIPreoptGetSolveLP()

◆ SCIPreoptApply()

◆ SCIPreoptDeleteNode()

◆ SCIPreoptResetDualBndchgs()

◆ SCIPreoptSplitRoot()

◆ SCIPreoptApplyCompression()

◆ SCIPreoptSaveOpenNodes()

◆ SCIPreoptMergeVarHistory()

◆ SCIPreoptUpdateVarHistory()

◆ SCIPreoptnodeInit()

◆ SCIPreoptnodeReset()

◆ SCIPreoptnodeDelete()

◆ SCIPreoptnodeAddBndchg()

◆ SCIPreoptnodeAddCons()

◆ SCIPreoptnodeGetPath()

◆ SCIPreoptAddCons()

◆ SCIPreoptSaveGlobalBounds()

◆ SCIPreoptSaveActiveConss()

◆ SCIPreoptInstallBounds()

◆ SCIPreoptResetActiveConss()

◆ SCIPreoptConsCanBeDeleted()