SCIP
Solving Constraint Integer Programs
branch_cloud.c File Reference
Detailed Description
cloud branching rule
Branching rule based on muliple optimal solutions to the current LP relaxation. See
Cloud Branching
Timo Berthold and Domenico Salvagnin
Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems, CPAIOR 2013, LNCS 7874
Preliminary version available as ZIB-Report 13-01.
Definition in file branch_cloud.c.
#include "blockmemshell/memory.h"#include "scip/branch_allfullstrong.h"#include "scip/branch_cloud.h"#include "scip/branch_fullstrong.h"#include "scip/pub_branch.h"#include "scip/pub_lp.h"#include "scip/pub_message.h"#include "scip/pub_tree.h"#include "scip/pub_var.h"#include "scip/scip_branch.h"#include "scip/scip_general.h"#include "scip/scip_lp.h"#include "scip/scip_mem.h"#include "scip/scip_message.h"#include "scip/scip_numerics.h"#include "scip/scip_param.h"#include "scip/scip_prob.h"#include "scip/scip_sol.h"#include "scip/scip_solvingstats.h"#include "scip/scip_timing.h"#include "scip/scip_tree.h"#include "scip/scip_var.h"#include <string.h>Go to the source code of this file.
Macros | |
| #define | BRANCHRULE_NAME "cloud" |
| #define | BRANCHRULE_DESC "branching rule that considers several alternative LP optima" |
| #define | BRANCHRULE_PRIORITY 0 |
| #define | BRANCHRULE_MAXDEPTH -1 |
| #define | BRANCHRULE_MAXBOUNDDIST 1.0 |
| #define | DEFAULT_USECLOUD TRUE |
| #define | DEFAULT_USEUNION FALSE |
| #define | DEFAULT_MAXPOINTS -1 |
| #define | DEFAULT_MINSUCCESSRATE 0.0 |
| #define | DEFAULT_MINSUCCESSUNION 0.0 |
| #define | DEFAULT_MAXDEPTHUNION 65000 |
| #define | DEFAULT_ONLYF2 FALSE |
Functions | |
| static | SCIP_DECL_BRANCHFREE (branchFreeCloud) |
| static | SCIP_DECL_BRANCHINIT (branchInitCloud) |
| static | SCIP_DECL_BRANCHEXECLP (branchExeclpCloud) |
| SCIP_RETCODE | SCIPincludeBranchruleCloud (SCIP *scip) |
Macro Definition Documentation
◆ BRANCHRULE_NAME
| #define BRANCHRULE_NAME "cloud" |
Definition at line 65 of file branch_cloud.c.
Referenced by SCIP_DECL_BRANCHEXECLP(), and SCIPincludeBranchruleCloud().
◆ BRANCHRULE_DESC
| #define BRANCHRULE_DESC "branching rule that considers several alternative LP optima" |
Definition at line 66 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ BRANCHRULE_PRIORITY
| #define BRANCHRULE_PRIORITY 0 |
Definition at line 67 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ BRANCHRULE_MAXDEPTH
| #define BRANCHRULE_MAXDEPTH -1 |
Definition at line 68 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ BRANCHRULE_MAXBOUNDDIST
| #define BRANCHRULE_MAXBOUNDDIST 1.0 |
Definition at line 69 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_USECLOUD
| #define DEFAULT_USECLOUD TRUE |
should a cloud of points be used?
Definition at line 71 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_USEUNION
| #define DEFAULT_USEUNION FALSE |
should the union of candidates be used?
Definition at line 72 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_MAXPOINTS
| #define DEFAULT_MAXPOINTS -1 |
maximum number of points for the cloud (-1 means no limit)
Definition at line 73 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_MINSUCCESSRATE
| #define DEFAULT_MINSUCCESSRATE 0.0 |
minimum success rate for the cloud
Definition at line 74 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_MINSUCCESSUNION
| #define DEFAULT_MINSUCCESSUNION 0.0 |
minimum success rate for the union
Definition at line 75 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_MAXDEPTHUNION
| #define DEFAULT_MAXDEPTHUNION 65000 |
maximum depth for the union
Definition at line 76 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
◆ DEFAULT_ONLYF2
| #define DEFAULT_ONLYF2 FALSE |
should only F2 be used?
Definition at line 77 of file branch_cloud.c.
Referenced by SCIPincludeBranchruleCloud().
Function Documentation
◆ SCIP_DECL_BRANCHFREE()
|
static |
destructor of branching rule to free user data (called when SCIP is exiting)
Definition at line 112 of file branch_cloud.c.
References NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPbranchruleGetData(), SCIPbranchruleSetData(), SCIPfreeBlockMemory, SCIPfreeBlockMemoryArrayNull, SCIPfreeClock(), SCIPgetClockTime(), SCIPstatistic, and SCIPstatisticMessage.
◆ SCIP_DECL_BRANCHINIT()
|
static |
initialization method of branching rule (called after problem was transformed)
Definition at line 154 of file branch_cloud.c.
References NULL, SCIP_CALL, SCIP_OKAY, SCIPbranchruleGetData(), and SCIPresetClock().
◆ SCIP_DECL_BRANCHEXECLP()
|
static |
branching execution method for fractional LP solutions
Definition at line 178 of file branch_cloud.c.
References BMSclearMemoryArray, BMScopyMemoryArray, BRANCHRULE_NAME, FALSE, MAX, MIN, NULL, SCIP_Bool, SCIP_BRANCHED, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DIDNOTRUN, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_VARTYPE_INTEGER, SCIPallColsInLP(), SCIPallocBlockMemoryArray, SCIPallocBufferArray, SCIPbranchruleGetData(), SCIPbranchruleGetName(), SCIPbranchVar(), SCIPceil(), SCIPchgRowLhsDive(), SCIPchgRowRhsDive(), SCIPchgVarLbDive(), SCIPchgVarObjDive(), SCIPchgVarUbDive(), SCIPcreateSol(), SCIPdebugMsg, SCIPendDive(), SCIPfloor(), SCIPfrac(), SCIPfreeBufferArray, SCIPgetCutoffbound(), SCIPgetDepth(), SCIPgetLPBranchCands(), SCIPgetLPRows(), SCIPgetLPSolstat(), SCIPgetNBinVars(), SCIPgetNIntVars(), SCIPgetNLPBranchCands(), SCIPgetNLPRows(), SCIPgetRowActivity(), SCIPgetSolOrigObj(), SCIPgetSolVal(), SCIPgetVarRedcost(), SCIPgetVarsData(), SCIPinfinity(), SCIPisExactSolve(), SCIPisFeasEQ(), SCIPisFeasIntegral(), SCIPisFeasZero(), SCIPisIntegral(), SCIPisLPSolBasic(), SCIPisLT(), SCIPisZero(), SCIPlinkLPSol(), SCIPnodeGetLowerbound(), SCIProwGetDualsol(), SCIProwGetLhs(), SCIProwGetRhs(), SCIPselectVarPseudoStrongBranching(), SCIPselectVarStrongBranching(), SCIPsolveDiveLP(), SCIPstartClock(), SCIPstartDive(), SCIPstopClock(), SCIPtrySolFree(), SCIPupdateNodeLowerbound(), SCIPvarGetName(), SCIPvarGetSol(), SCIPvarGetType(), SCIPwarningMessage(), and TRUE.