SCIP
Solving Constraint Integer Programs
Solving Constraint Integer Programs
internal methods for LP management
Definition in file lp.h.
#include <stdio.h>#include "scip/def.h"#include "blockmemshell/memory.h"#include "scip/type_set.h"#include "scip/type_stat.h"#include "scip/type_misc.h"#include "scip/type_lp.h"#include "scip/type_var.h"#include "scip/type_prob.h"#include "scip/type_sol.h"#include "scip/pub_lp.h"#include "scip/struct_lp.h"Go to the source code of this file.
| SCIP_RETCODE SCIPcolCreate | ( | SCIP_COL ** | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_VAR * | var, | ||
| int | len, | ||
| SCIP_ROW ** | rows, | ||
| SCIP_Real * | vals, | ||
| SCIP_Bool | removable | ||
| ) |
creates an LP column
| col | pointer to column data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| var | variable, this column represents |
| len | number of nonzeros in the column |
| rows | array with rows of column entries |
| vals | array with coefficients of column entries |
| removable | should the column be removed from the LP due to aging or cleanup? |
Definition at line 3182 of file lp.c.
References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSduplicateBlockMemoryArray, FALSE, SCIP_Stat::ncolidx, SCIP_Var::obj, SCIP_ALLOC, SCIP_BASESTAT_ZERO, SCIP_INVALID, SCIP_OKAY, SCIPsetIsZero(), SCIPstatIncrement, SCIPvarGetLbLazy(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetUbLazy(), SCIPvarGetUbLocal(), SCIPvarGetUnchangedObj(), SCIPvarIsIntegral(), and TRUE.
Referenced by SCIPvarColumn().
| SCIP_RETCODE SCIPcolFree | ( | SCIP_COL ** | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP column
| col | pointer to LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
Definition at line 3280 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, colUnlink(), SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, and SCIPvarGetStatus().
Referenced by SCIPvarLoose(), and varFree().
| void SCIPcolPrint | ( | SCIP_COL * | col, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output column to file stream
| col | LP column |
| messagehdlr | message handler |
| file | output file (or NULL for standard output) |
Definition at line 3310 of file lp.c.
References SCIP_Col::lb, SCIP_Col::len, SCIP_Row::name, SCIP_Col::obj, SCIP_Col::rows, SCIPmessageFPrintInfo(), SCIP_Col::ub, SCIP_Col::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIPcolAddCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | val | ||
| ) |
adds a previously non existing coefficient to an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| val | value of coefficient |
Definition at line 3350 of file lp.c.
References checkLinks, colAddCoef(), SCIP_Lp::diving, SCIP_CALL, and SCIP_OKAY.
| SCIP_RETCODE SCIPcolDelCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row | ||
| ) |
deletes coefficient from column
deletes existing coefficient from column
| col | column to be changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | coefficient to be deleted |
Definition at line 3371 of file lp.c.
References checkLinks, colDelCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, SCIP_Row::name, rowDelCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPsetIsEQ(), SCIPvarGetName(), SCIP_Col::vals, SCIP_Row::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIPcolChgCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | val | ||
| ) |
changes or adds a coefficient to an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| val | value of coefficient |
Definition at line 3416 of file lp.c.
References checkLinks, colAddCoef(), colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, rowChgCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIP_Col::vals, and SCIP_Row::vals.
| SCIP_RETCODE SCIPcolIncCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | incval | ||
| ) |
increases value of an existing or nonexisting coefficient in an LP column
increases value of an existing or non-existing coefficient in an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| incval | value to add to the coefficient |
Definition at line 3467 of file lp.c.
References checkLinks, colAddCoef(), colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, rowChgCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIPsetIsZero(), SCIP_Col::vals, and SCIP_Row::vals.
| SCIP_RETCODE SCIPcolChgObj | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newobj | ||
| ) |
changes objective value of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newobj | new objective value |
Definition at line 3601 of file lp.c.
References SCIP_Lp::divingobjchg, FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lb, SCIP_Col::lpipos, lpUpdateObjNorms(), SCIP_Lp::nchgcols, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarGetUnchangedObj(), TRUE, SCIP_Col::ub, SCIP_Col::unchangedobj, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgObjDive().
| SCIP_RETCODE SCIPcolChgLb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newlb | ||
| ) |
changes lower bound of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newlb | new lower bound value |
Definition at line 3660 of file lp.c.
References FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lb, SCIP_Col::lbchanged, SCIP_Col::lpipos, SCIP_Lp::nchgcols, SCIP_Col::obj, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), TRUE, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgLbDive().
| SCIP_RETCODE SCIPcolChgUb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newub | ||
| ) |
changes upper bound of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newub | new upper bound value |
Definition at line 3705 of file lp.c.
References FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lpipos, SCIP_Lp::nchgcols, SCIP_Col::obj, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), TRUE, SCIP_Col::ub, SCIP_Col::ubchanged, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgUbDive().
calculates the reduced costs of a column using the given dual solution vector
| col | LP column |
| dualsol | dual solution vector for current LP rows |
Definition at line 3750 of file lp.c.
References SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, SCIP_Col::nunlinked, SCIP_Col::obj, SCIP_Col::rows, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
gets the reduced costs of a column in last LP or after recalculation
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 3855 of file lp.c.
References colCalcInternalRedcost(), SCIP_Stat::lpcount, SCIP_Col::redcost, SCIP_INVALID, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by getImplVarRedcost(), SCIPcolGetFeasibility(), SCIPgetColRedcost(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
gets the feasibility of (the dual row of) a column in last LP or after recalculation
| col | LP column |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 3879 of file lp.c.
References SCIP_Col::lb, SCIP_Stat::lpcount, REALABS, SCIP_Real, SCIPcolGetRedcost(), SCIPsetInfinity(), SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIP_Col::ub, and SCIP_Lp::validsollp.
Referenced by SCIPpricestoreAddProbVars().
calculates the Farkas coefficient y^T A_i of a column i using the given dual Farkas vector y
| col | LP column |
| dualfarkas | dense dual Farkas vector for current LP rows |
Definition at line 3933 of file lp.c.
References SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, SCIP_Col::nunlinked, SCIP_Col::rows, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
gets the Farkas coefficient y^T A_i of a column i in last LP (which must be infeasible)
gets the Farkas coefficient of a column in last LP (which must be infeasible)
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 4038 of file lp.c.
References colCalcInternalFarkasCoef(), SCIP_Col::farkascoef, SCIP_Stat::lpcount, SCIP_INVALID, SCIP_Col::validfarkaslp, and SCIP_Lp::validfarkaslp.
Referenced by SCIPcolGetFarkasValue(), and SCIPgetColFarkasCoef().
gets the Farkas value of a column in last LP (which must be infeasible), i.e. the Farkas coefficient y^T A_i times the best bound for this coefficient, i.e. max{y^T A_i x_i | lb <= x_i <= ub}
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 4064 of file lp.c.
References SCIP_Col::lb, SCIP_Real, SCIPcolGetFarkasCoef(), and SCIP_Col::ub.
Referenced by SCIPpricestoreAddProbVars().
| SCIP_RETCODE SCIPlpStartStrongbranch | ( | SCIP_LP * | lp | ) |
start strong branching - call before any strong branching
| lp | LP data |
Definition at line 4083 of file lp.c.
References SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiStartStrongbranch(), SCIP_Lp::strongbranching, and TRUE.
Referenced by SCIPstartStrongbranch().
| SCIP_RETCODE SCIPlpEndStrongbranch | ( | SCIP_LP * | lp | ) |
end strong branching - call after any strong branching
| lp | LP data |
Definition at line 4098 of file lp.c.
References FALSE, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiEndStrongbranch(), and SCIP_Lp::strongbranching.
Referenced by SCIPendStrongbranch().
| void SCIPcolSetStrongbranchData | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | lpobjval, | ||
| SCIP_Real | primsol, | ||
| SCIP_Real | sbdown, | ||
| SCIP_Real | sbup, | ||
| SCIP_Bool | sbdownvalid, | ||
| SCIP_Bool | sbupvalid, | ||
| SCIP_Longint | iter, | ||
| int | itlim | ||
| ) |
sets strong branching information for a column variable
| col | LP column |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| lp | LP data |
| lpobjval | objective value of the current LP |
| primsol | primal solution value of the column in the current LP |
| sbdown | dual bound after branching column down |
| sbup | dual bound after branching column up |
| sbdownvalid | is the returned down value a valid dual bound? |
| sbupvalid | is the returned up value a valid dual bound? |
| iter | total number of strong branching iterations |
| itlim | iteration limit applied to the strong branching call |
Definition at line 4113 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, SCIP_Stat::lpcount, SCIP_Col::lpipos, SCIP_Col::lppos, SCIP_Lp::ncols, SCIP_Stat::nnodes, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_VARSTATUS_COLUMN, SCIPcolIsIntegral(), SCIPstatAdd, SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::strongbranchprobing, SCIP_Col::validsblp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchWithPropagation().
| void SCIPcolInvalidateStrongbranchData | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp | ||
| ) |
invalidates strong branching information for a column variable
| col | LP column |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| lp | LP data |
Definition at line 4167 of file lp.c.
References SCIP_Lp::cols, FALSE, SCIP_Col::lpipos, SCIP_Col::lppos, SCIP_Lp::ncols, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_INVALID, SCIP_VARSTATUS_COLUMN, SCIPcolIsIntegral(), SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::strongbranchprobing, SCIP_Col::validsblp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchWithPropagation().
| SCIP_RETCODE SCIPcolGetStrongbranch | ( | SCIP_COL * | col, |
| SCIP_Bool | integral, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_LP * | lp, | ||
| int | itlim, | ||
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Bool * | lperror | ||
| ) |
gets strong branching information on a column variable
| col | LP column |
| integral | should integral strong branching be performed? |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| prob | problem data |
| lp | LP data |
| itlim | iteration limit for strong branchings |
| down | stores dual bound after branching column down |
| up | stores dual bound after branching column up |
| downvalid | stores whether the returned down value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| upvalid | stores whether the returned up value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 4202 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjvalinf, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Col::lpipos, SCIP_Lp::lpobjval, SCIP_Col::lppos, SCIP_Lp::lpsolstat, SCIP_Lp::ncols, SCIP_Stat::nduallpiterations, SCIP_Stat::nduallps, SCIP_Stat::ndualresolvelpiterations, SCIP_Stat::ndualresolvelps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, SCIP_Col::primsol, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPERROR, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPclockStart(), SCIPclockStop(), SCIPcolIsIntegral(), SCIPlpGetObjval(), SCIPlpiStrongbranchFrac(), SCIPlpiStrongbranchInt(), SCIPsetDebugMsg, SCIPsetInfinity(), SCIPsetIsFeasIntegral(), SCIPsetIsIntegral(), SCIPstatAdd, SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::solved, SCIP_Lp::strongbranching, SCIP_Stat::strongbranchtime, TRUE, SCIP_Col::validsblp, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchFrac(), and SCIPgetVarStrongbranchInt().
| SCIP_RETCODE SCIPcolGetStrongbranches | ( | SCIP_COL ** | cols, |
| int | ncols, | ||
| SCIP_Bool | integral, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_LP * | lp, | ||
| int | itlim, | ||
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Bool * | lperror | ||
| ) |
gets strong branching information on column variables
| cols | LP columns |
| ncols | number of columns |
| integral | should integral strong branching be performed? |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| prob | problem data |
| lp | LP data |
| itlim | iteration limit for strong branchings |
| down | stores dual bounds after branching columns down |
| up | stores dual bounds after branching columns up |
| downvalid | stores whether the returned down values are valid dual bounds, or NULL; otherwise, they can only be used as an estimate value |
| upvalid | stores whether the returned up values are valid dual bounds, or NULL; otherwise, they can only be used as an estimate value |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 4361 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjvalinf, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Col::lpipos, SCIP_Col::lppos, SCIP_Lp::lpsolstat, SCIP_Lp::ncols, SCIP_Stat::nduallpiterations, SCIP_Stat::nduallps, SCIP_Stat::ndualresolvelpiterations, SCIP_Stat::ndualresolvelps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, SCIP_Col::primsol, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPERROR, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPclockStart(), SCIPclockStop(), SCIPcolIsIntegral(), SCIPlpGetObjval(), SCIPlpiStrongbranchesFrac(), SCIPlpiStrongbranchesInt(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasIntegral(), SCIPstatAdd, SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::solved, SCIP_Stat::strongbranchtime, TRUE, SCIP_Col::validsblp, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPgetVarsStrongbranchesFrac(), and SCIPgetVarsStrongbranchesInt().
| void SCIPcolGetStrongbranchLast | ( | SCIP_COL * | col, |
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Real * | solval, | ||
| SCIP_Real * | lpobjval | ||
| ) |
gets last strong branching information available for a column variable; returns values of SCIP_INVALID, if strong branching was not yet called on the given column; keep in mind, that the returned old values may have nothing to do with the current LP solution
| col | LP column |
| down | stores dual bound after branching column down, or NULL |
| up | stores dual bound after branching column up, or NULL |
| downvalid | stores whether the returned down value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| upvalid | stores whether the returned up value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| solval | stores LP solution value of column at last strong branching call, or NULL |
| lpobjval | stores LP objective value at last strong branching call, or NULL |
Definition at line 4597 of file lp.c.
References SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sblpobjval, SCIP_Col::sbsolval, SCIP_Col::sbup, and SCIP_Col::sbupvalid.
Referenced by SCIPgetVarStrongbranchLast().
| SCIP_Longint SCIPcolGetStrongbranchLPAge | ( | SCIP_COL * | col, |
| SCIP_STAT * | stat | ||
| ) |
if strong branching was already applied on the column at the current node, returns the number of LPs solved after the LP where the strong branching on this column was applied; if strong branching was not yet applied on the column at the current node, returns INT_MAX
| col | LP column |
| stat | dynamic problem statistics |
Definition at line 4629 of file lp.c.
References SCIP_Stat::lpcount, SCIP_Stat::nnodes, SCIP_Stat::nsbdivinglps, SCIP_Col::sbnode, SCIP_LONGINT_MAX, and SCIP_Col::validsblp.
Referenced by SCIPgetVarStrongbranchLPAge().
marks a column to be not removable from the LP in the current node because it became obsolete
| col | LP column |
| stat | problem statistics |
Definition at line 4641 of file lp.c.
References SCIP_Stat::nnodes, and SCIP_Col::obsoletenode.
Referenced by SCIPmarkColNotRemovableLocal().
| SCIP_RETCODE SCIProwCreate | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| const char * | name, | ||
| int | len, | ||
| SCIP_COL ** | cols, | ||
| SCIP_Real * | vals, | ||
| SCIP_Real | lhs, | ||
| SCIP_Real | rhs, | ||
| SCIP_ROWORIGINTYPE | origintype, | ||
| void * | origin, | ||
| SCIP_Bool | local, | ||
| SCIP_Bool | modifiable, | ||
| SCIP_Bool | removable | ||
| ) |
creates and captures an LP row
| row | pointer to LP row data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
| name | name of row |
| len | number of nonzeros in the row |
| cols | array with columns of row entries |
| vals | array with coefficients of row entries |
| lhs | left hand side of row |
| rhs | right hand side of row |
| origintype | type of origin of row |
| origin | pointer to constraint handler or separator who created the row (NULL if unkown) |
| local | is row only valid locally? |
| modifiable | is row modifiable during node processing (subject to column generation)? |
| removable | should the row be removed from the LP due to aging or cleanup? |
Definition at line 5001 of file lp.c.
References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSduplicateBlockMemoryArray, FALSE, SCIP_Col::index, SCIP_Stat::nrowidx, rowCalcNorms(), SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIPeventfilterCreate(), SCIProwCapture(), SCIPsetInfinity(), SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), SCIPstatIncrement, SCIPvarIsIntegral(), TRUE, and SCIP_Col::var.
Referenced by SCIPcreateEmptyRowCons(), SCIPcreateEmptyRowSepa(), SCIPcreateEmptyRowUnspec(), SCIPcreateRowCons(), SCIPcreateRowSepa(), SCIPcreateRowUnspec(), and SCIPreoptApplyCuts().
| SCIP_RETCODE SCIProwFree | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP row
| row | pointer to LP row |
| blkmem | block memory |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 5142 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, rowUnlink(), SCIP_CALL, SCIP_OKAY, and SCIPeventfilterFree().
Referenced by SCIProwRelease().
| void SCIProwPrint | ( | SCIP_ROW * | row, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output row to file stream
| row | LP row |
| messagehdlr | message handler |
| file | output file (or NULL for standard output) |
Definition at line 5174 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::name, REALABS, SCIP_Row::rhs, SCIP_DEFAULT_EPSILON, SCIP_VARSTATUS_COLUMN, SCIPmessageFPrintInfo(), SCIPvarGetName(), SCIPvarGetStatus(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPprintRow().
| SCIP_RETCODE SCIProwEnsureSize | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| int | num | ||
| ) |
ensures, that column array of row can store at least num entries
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 586 of file lp.c.
References BMSreallocBlockMemoryArray, checkRow, SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, SCIP_ALLOC, SCIP_Bool, SCIP_OKAY, SCIPsetCalcMemGrowSize(), SCIP_Row::size, TRUE, and SCIP_Row::vals.
Referenced by rowAddCoef(), SCIPaddVarsToRow(), and SCIPaddVarsToRowSameCoef().
| void SCIProwCapture | ( | SCIP_ROW * | row | ) |
increases usage counter of LP row
| row | LP row |
Definition at line 5214 of file lp.c.
References SCIP_Row::name, SCIP_Row::nlocks, SCIP_Row::nuses, and SCIPdebugMessage.
Referenced by cutCreate(), forkCreate(), forkFree(), lpFlushAddRows(), pseudoforkCreate(), SCIPcaptureRow(), SCIPlpAddRow(), SCIProwCreate(), SCIPsepastoreAddCut(), and SCIPsepastoreApplyCuts().
| SCIP_RETCODE SCIProwRelease | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_LP * | lp | ||
| ) |
decreases usage counter of LP row, and frees memory if necessary
| row | pointer to LP row |
| blkmem | block memory |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 5227 of file lp.c.
References SCIP_CALL, SCIP_OKAY, SCIProwFree(), and SCIPsetDebugMsg.
Referenced by cutFree(), forkFree(), lpDelRowset(), lpFlushDelRows(), pseudoforkFree(), SCIPlpFree(), SCIPlpShrinkRows(), SCIPreleaseRow(), SCIPreoptApplyCuts(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreClearCuts(), sepastoreDelCut(), and subrootFree().
| void SCIProwDelaySort | ( | SCIP_ROW * | row | ) |
enables delaying of row sorting
| row | LP row |
Definition at line 6023 of file lp.c.
References SCIP_Row::delaysort, and TRUE.
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPcacheRowExtensions().
disables delaying of row sorting, sorts row and merges coefficients with equal columns
| row | LP row |
| set | global SCIP settings |
Definition at line 6034 of file lp.c.
References SCIP_Row::delaysort, FALSE, and rowMerge().
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPflushRowExtensions().
| SCIP_RETCODE SCIProwAddCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | val | ||
| ) |
adds a previously non existing coefficient to an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| val | value of coefficient |
Definition at line 5284 of file lp.c.
References checkLinks, SCIP_Lp::diving, SCIP_Row::lppos, rowAddCoef(), SCIP_CALL, and SCIP_OKAY.
| SCIP_RETCODE SCIProwDelCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col | ||
| ) |
deletes coefficient from row
| row | row to be changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | coefficient to be deleted |
Definition at line 5305 of file lp.c.
References checkLinks, colDelCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Row::name, rowDelCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPsetIsEQ(), SCIPvarGetName(), SCIP_Col::vals, SCIP_Row::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIProwChgCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | val | ||
| ) |
changes or adds a coefficient to an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| val | value of coefficient |
Definition at line 5351 of file lp.c.
References checkLinks, colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, rowAddCoef(), rowChgCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIP_Col::vals, and SCIP_Row::vals.
| SCIP_RETCODE SCIProwIncCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | incval | ||
| ) |
increases value of an existing or nonexisting coefficient in an LP column
increases value of an existing or non-existing coefficient in an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| incval | value to add to the coefficient |
Definition at line 5403 of file lp.c.
References checkLinks, colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, rowAddCoef(), rowChgCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIPsetIsZero(), SCIP_Row::validactivitylp, SCIP_Col::vals, and SCIP_Row::vals.
Referenced by SCIPvarAddToRow().
| SCIP_RETCODE SCIProwChgConstant | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | constant | ||
| ) |
changes constant value of a row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| lp | current LP data |
| constant | new constant value |
Definition at line 5460 of file lp.c.
References SCIP_Row::constant, SCIP_Lp::diving, SCIP_Stat::domchgcount, SCIP_Row::lhs, SCIP_Row::lppos, SCIP_Row::maxactivity, SCIP_Row::minactivity, SCIP_Row::pseudoactivity, REALABS, SCIP_Row::rhs, rowEventConstantChanged(), rowSideChanged(), SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIP_Row::validactivitybdsdomchg, and SCIP_Row::validpsactivitydomchg.
Referenced by rowScale(), and SCIProwAddConstant().
| SCIP_RETCODE SCIProwAddConstant | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | addval | ||
| ) |
add constant value to a row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| lp | current LP data |
| addval | constant value to add to the row |
Definition at line 5515 of file lp.c.
References SCIP_Row::constant, SCIP_Lp::diving, SCIP_Row::lhs, SCIP_Row::lppos, REALABS, SCIP_Row::rhs, SCIP_CALL, SCIP_OKAY, SCIProwChgConstant(), SCIPsetIsInfinity(), and SCIPsetIsZero().
Referenced by SCIPvarAddToRow().
| SCIP_RETCODE SCIProwChgLhs | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | lhs | ||
| ) |
changes left hand side of LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| lhs | new left hand side |
Definition at line 5541 of file lp.c.
References SCIP_Lp::diving, SCIP_Row::lhs, rowEventSideChanged(), rowSideChanged(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, and SCIPsetIsEQ().
Referenced by rowScale(), SCIPchgRowLhs(), SCIPchgRowLhsDive(), and SCIPlpEndDive().
| SCIP_RETCODE SCIProwChgRhs | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | rhs | ||
| ) |
changes right hand side of LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| rhs | new right hand side |
Definition at line 5573 of file lp.c.
References SCIP_Lp::diving, SCIP_Row::rhs, rowEventSideChanged(), rowSideChanged(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_RIGHT, and SCIPsetIsEQ().
Referenced by rowScale(), SCIPchgRowRhs(), SCIPchgRowRhsDive(), and SCIPlpEndDive().
| SCIP_RETCODE SCIProwChgLocal | ( | SCIP_ROW * | row, |
| SCIP_Bool | local | ||
| ) |
changes the local flag of LP row
| row | LP row |
| local | new value for local flag |
Definition at line 5605 of file lp.c.
References SCIP_Row::local, and SCIP_OKAY.
Referenced by SCIPsepastoreAddCut().
| SCIP_RETCODE SCIProwCalcIntegralScalar | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_Real | mindelta, | ||
| SCIP_Real | maxdelta, | ||
| SCIP_Longint | maxdnom, | ||
| SCIP_Real | maxscale, | ||
| SCIP_Bool | usecontvars, | ||
| SCIP_Real * | intscalar, | ||
| SCIP_Bool * | success | ||
| ) |
tries to find a value, such that all row coefficients, if scaled with this value become integral
| row | LP row |
| set | global SCIP settings |
| mindelta | minimal relative allowed difference of scaled coefficient s*c and integral i |
| maxdelta | maximal relative allowed difference of scaled coefficient s*c and integral i |
| maxdnom | maximal denominator allowed in rational numbers |
| maxscale | maximal allowed scalar |
| usecontvars | should the coefficients of the continuous variables also be made integral? |
| intscalar | pointer to store scalar that would make the coefficients integral, or NULL |
| success | stores whether returned value is valid |
Definition at line 5622 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, isIntegralScalar(), SCIP_Row::len, nscalars, REALABS, SCIP_Bool, SCIP_INVALID, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIP_REAL_MAX, SCIP_VARSTATUS_COLUMN, SCIPcalcGreComDiv(), SCIPcolIsIntegral(), SCIPdebug, SCIPrealToRational(), SCIProwGetName(), SCIPsetDebugMsg, SCIPsetIsInfinity(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetStatus(), TRUE, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPcalcRowIntegralScalar(), and SCIProwMakeIntegral().
| SCIP_RETCODE SCIProwMakeIntegral | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | mindelta, | ||
| SCIP_Real | maxdelta, | ||
| SCIP_Longint | maxdnom, | ||
| SCIP_Real | maxscale, | ||
| SCIP_Bool | usecontvars, | ||
| SCIP_Bool * | success | ||
| ) |
tries to scale row, s.t. all coefficients become integral
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| stat | problem statistics |
| lp | current LP data |
| mindelta | minimal relative allowed difference of scaled coefficient s*c and integral i |
| maxdelta | maximal relative allowed difference of scaled coefficient s*c and integral i |
| maxdnom | maximal denominator allowed in rational numbers |
| maxscale | maximal value to scale row with |
| usecontvars | should the coefficients of the continuous variables also be made integral? |
| success | stores whether row could be made rational |
Definition at line 5856 of file lp.c.
References rowScale(), SCIP_CALL, SCIP_OKAY, SCIP_Real, and SCIProwCalcIntegralScalar().
Referenced by SCIPmakeRowIntegral().
recalculates the current activity of a row
| row | LP row |
| stat | problem statistics |
Definition at line 6047 of file lp.c.
References SCIP_Row::activity, SCIP_Row::cols, SCIP_Row::constant, SCIP_Row::linkpos, SCIP_Stat::lpcount, SCIP_Col::lppos, SCIP_Row::nlpcols, SCIP_Row::nunlinked, SCIP_Col::primsol, SCIP_INVALID, SCIP_Row::validactivitylp, and SCIP_Row::vals.
Referenced by SCIPrecalcRowActivity(), SCIPrecalcRowLPActivity(), and SCIProwGetLPActivity().
returns the activity of a row in the current LP solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 6099 of file lp.c.
References SCIP_Row::activity, SCIP_Interval::inf, SCIP_Stat::lpcount, MAX, SCIP_INVALID, SCIP_Real, SCIProwRecalcLPActivity(), SCIPsetInfinity(), SCIP_Row::validactivitylp, and SCIP_Lp::validsollp.
Referenced by SCIPgetRowActivity(), SCIPgetRowLPActivity(), SCIPgetRowSolActivity(), and SCIProwGetLPFeasibility().
| SCIP_Real SCIProwGetLPFeasibility | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp | ||
| ) |
returns the feasibility of a row in the current LP solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 6129 of file lp.c.
References SCIP_Row::lhs, SCIP_Row::rhs, SCIP_Real, and SCIProwGetLPActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowFeasibility(), SCIPgetRowLPFeasibility(), SCIPgetRowSolFeasibility(), and SCIProwGetLPEfficacy().
returns the feasibility of a row in the current relaxed solution: negative value means infeasibility
returns the feasibility of a row in the relaxed solution solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6149 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, SCIP_Row::nlpcols, SCIP_Row::nunlinked, SCIP_Row::rhs, SCIP_Real, SCIPsetInfinity(), SCIPvarGetRelaxSol(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIProwGetRelaxEfficacy().
returns the feasibility of a row in the current NLP solution: negative value means infeasibility
returns the feasibility of a row in the current NLP solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6211 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, SCIP_Row::nlpcols, SCIP_Row::nunlinked, SCIP_Row::rhs, SCIP_Real, SCIPsetInfinity(), SCIPvarGetNLPSol(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIProwGetNLPEfficacy().
calculates the current pseudo activity of a row
| row | row data |
| stat | problem statistics |
Definition at line 6270 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Stat::domchgcount, EPSISINT, SCIP_Row::integral, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Col::lppos, SCIP_Row::pseudoactivity, SCIP_DEFAULT_SUMEPSILON, SCIP_VARSTATUS_COLUMN, SCIPcolGetBestBound(), SCIPvarGetStatus(), SCIP_Row::validpsactivitydomchg, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPrecalcRowActivity(), SCIPrecalcRowPseudoActivity(), and SCIProwGetPseudoActivity().
returns the pseudo activity of a row in the current pseudo solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6297 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Interval::inf, MAX, SCIP_Row::pseudoactivity, SCIP_INVALID, SCIP_Real, SCIProwRecalcPseudoActivity(), SCIPsetInfinity(), and SCIP_Row::validpsactivitydomchg.
Referenced by SCIPgetRowActivity(), SCIPgetRowPseudoActivity(), SCIPgetRowSolActivity(), and SCIProwGetPseudoFeasibility().
returns the pseudo feasibility of a row in the current pseudo solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6325 of file lp.c.
References SCIP_Row::lhs, SCIP_Row::rhs, SCIP_Real, and SCIProwGetPseudoActivity().
Referenced by SCIPgetRowFeasibility(), SCIPgetRowPseudoFeasibility(), and SCIPgetRowSolFeasibility().
| SCIP_Real SCIProwGetSolActivity | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns the activity of a row for a given solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6341 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Col::lb, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, SCIP_Row::rhs, SCIP_Real, SCIP_UNKNOWN, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsolGetVal(), SCIP_Col::ub, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPgetRowSolActivity(), SCIProwGetSolFeasibility(), and SCIPsolAdjustImplicitSolVals().
| SCIP_Real SCIProwGetSolFeasibility | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns the feasibility of a row for the given solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6383 of file lp.c.
References SCIP_Row::lhs, SCIP_Row::rhs, SCIP_Real, and SCIProwGetSolActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowSolFeasibility(), and SCIProwGetSolEfficacy().
returns the minimal activity of a row w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6461 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddRow(), SCIPgetRowMinActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
returns the maximal activity of a row w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6482 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddRow(), SCIPgetRowMaxActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
returns whether the row is unmodifiable and redundant w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6503 of file lp.c.
References FALSE, SCIP_Row::lhs, SCIP_Row::modifiable, SCIP_Row::rhs, SCIP_Real, SCIProwGetMaxActivity(), SCIProwGetMinActivity(), SCIPsetIsFeasGT(), SCIPsetIsFeasLT(), SCIPsetIsInfinity(), and TRUE.
Referenced by SCIPlpRemoveRedundantRows().
gets maximal absolute value of row vector coefficients
| row | LP row |
| set | global SCIP settings |
Definition at line 6534 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxval, SCIP_Row::nummaxval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYEQ(), SCIP_DECL_HASHKEYVAL(), SCIPcutpoolAddRow(), SCIPcutpoolIsCutNew(), SCIPgetRowMaxCoef(), SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetRelaxEfficacy(), and SCIProwGetSolEfficacy().
gets minimal absolute value of row vector's non-zero coefficients
| row | LP row |
| set | global SCIP settings |
Definition at line 6550 of file lp.c.
References SCIP_Row::len, SCIP_Row::minval, SCIP_Row::numminval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYEQ(), and SCIPgetRowMinCoef().
gets maximal column index of row entries
| row | LP row |
| set | global SCIP settings |
Definition at line 6566 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxidx, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
Referenced by SCIPcutpoolAddNewRow().
gets minimal column index of row entries
| row | LP row |
| set | global SCIP settings |
Definition at line 6582 of file lp.c.
References SCIP_Row::len, SCIP_Row::minidx, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
gets number of integral columns in row
| row | LP row |
| set | global SCIP settings |
Definition at line 6598 of file lp.c.
References SCIP_Row::len, SCIP_Row::numintcols, and rowCalcIdxsAndVals().
Referenced by computeScore(), and SCIPgetRowNumIntCols().
returns row's efficacy with respect to the current LP solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| lp | current LP data |
Definition at line 6614 of file lp.c.
References eps, SCIP_Row::len, MAX, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetLPFeasibility(), SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore(), SCIPcutpoolAddNewRow(), SCIPcutpoolSeparate(), SCIPgetCutEfficacy(), SCIProwIsLPEfficacious(), SCIPsepastoreApplyCuts(), and SCIPsepastoreRemoveInefficaciousCuts().
| SCIP_Bool SCIProwIsLPEfficacious | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Bool | root | ||
| ) |
returns whether the row's efficacy with respect to the current LP solution is greater than the minimal cut efficacy
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| lp | current LP data |
| root | should the root's minimal cut efficacy be used? |
Definition at line 6655 of file lp.c.
References SCIP_Real, SCIProwGetLPEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPisCutEfficacious().
| SCIP_Real SCIProwGetSolEfficacy | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns row's efficacy with respect to the given primal solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6671 of file lp.c.
References eps, SCIP_Row::len, MAX, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSolFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPcutpoolSeparate(), SCIPgetCutEfficacy(), and SCIProwIsSolEfficacious().
| SCIP_Bool SCIProwIsSolEfficacious | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol, | ||
| SCIP_Bool | root | ||
| ) |
returns whether the row's efficacy with respect to the given primal solution is greater than the minimal cut efficacy
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
| root | should the root's minimal cut efficacy be used? |
Definition at line 6714 of file lp.c.
References SCIP_Real, SCIProwGetSolEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPisCutEfficacious().
returns row's efficacy with respect to the relaxed solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6730 of file lp.c.
References eps, SCIP_Row::len, MAX, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetRelaxFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore(), and SCIPsepastoreRemoveInefficaciousCuts().
returns row's efficacy with respect to the NLP solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6770 of file lp.c.
References eps, SCIP_Row::len, MAX, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNLPFeasibility(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore(), and SCIPsepastoreRemoveInefficaciousCuts().
gets parallelism of row with objective function: if the returned value is 1, the row is parallel to the objective function, if the value is 0, it is orthogonal to the objective function
| row | LP row |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 7606 of file lp.c.
References checkRowObjprod, checkRowSqrnorm, MAX, SCIP_Row::objprod, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, REALABS, SCIP_Real, SCIPlpRecalculateObjSqrNorm(), SCIPsetIsPositive(), SCIPsetIsSumGE(), SCIPsetIsSumLE(), and SCIP_Row::sqrnorm.
Referenced by computeScore(), and SCIPsepastoreApplyCuts().
| SCIP_RETCODE SCIProwCatchEvent | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTTYPE | eventtype, | ||
| SCIP_EVENTHDLR * | eventhdlr, | ||
| SCIP_EVENTDATA * | eventdata, | ||
| int * | filterpos | ||
| ) |
includes event handler with given data in row's event filter
| row | row |
| blkmem | block memory |
| set | global SCIP settings |
| eventtype | event type to catch |
| eventhdlr | event handler to call for the event processing |
| eventdata | event data to pass to the event handler for the event processing |
| filterpos | pointer to store position of event filter entry, or NULL |
Definition at line 7639 of file lp.c.
References SCIP_Row::eventfilter, SCIP_Row::name, SCIP_CALL, SCIP_EVENTTYPE_FORMAT, SCIP_EVENTTYPE_ROWCHANGED, SCIP_OKAY, SCIPeventfilterAdd(), and SCIPsetDebugMsg.
Referenced by SCIPcatchRowEvent().
| SCIP_RETCODE SCIProwDropEvent | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTTYPE | eventtype, | ||
| SCIP_EVENTHDLR * | eventhdlr, | ||
| SCIP_EVENTDATA * | eventdata, | ||
| int | filterpos | ||
| ) |
deletes event handler with given data from row's event filter
| row | row |
| blkmem | block memory |
| set | global SCIP settings |
| eventtype | event type mask of dropped event |
| eventhdlr | event handler to call for the event processing |
| eventdata | event data to pass to the event handler for the event processing |
| filterpos | position of event filter entry returned by SCIPvarCatchEvent(), or -1 |
Definition at line 7663 of file lp.c.
References SCIP_Row::eventfilter, SCIP_Row::name, SCIP_CALL, SCIP_OKAY, SCIPeventfilterDel(), and SCIPsetDebugMsg.
Referenced by SCIPdropRowEvent().
marks a row to be not removable from the LP in the current node
marks a row to be not removable from the LP in the current node because it became obsolete
| row | LP row |
| stat | problem statistics |
Definition at line 7684 of file lp.c.
References SCIP_Stat::nnodes, and SCIP_Row::obsoletenode.
Referenced by SCIPmarkRowNotRemovableLocal().
| SCIP_RETCODE SCIPlpCreate | ( | SCIP_LP ** | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_STAT * | stat, | ||
| const char * | name | ||
| ) |
creates empty LP data object
| lp | pointer to LP data object |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| name | problem name |
Definition at line 8879 of file lp.c.
References allocDiveChgSideArrays(), BMSallocMemory, DIVESTACKINITSIZE, FALSE, SCIP_Stat::lpcount, lpSetBoolpar(), lpSetIntpar(), lpSetRealpar(), SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPPAR_BARRIERCONVTOL, SCIP_LPPAR_CONDITIONLIMIT, SCIP_LPPAR_DUALFEASTOL, SCIP_LPPAR_FASTMIP, SCIP_LPPAR_FEASTOL, SCIP_LPPAR_FROMSCRATCH, SCIP_LPPAR_LPINFO, SCIP_LPPAR_LPITLIM, SCIP_LPPAR_OBJLIM, SCIP_LPPAR_POLISHING, SCIP_LPPAR_PRESOLVING, SCIP_LPPAR_PRICING, SCIP_LPPAR_RANDOMSEED, SCIP_LPPAR_REFACTOR, SCIP_LPPAR_ROWREPSWITCH, SCIP_LPPAR_SCALING, SCIP_LPPAR_THREADS, SCIP_LPPAR_TIMING, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_PARAMETERWRONGVAL, SCIP_PRICING_AUTO, SCIP_VERBLEVEL_FULL, SCIPerrorMessage, SCIPlpiCreate(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPmessagePrintVerbInfo(), SCIPsetBarrierconvtol(), SCIPsetDualfeastol(), SCIPsetInfinity(), SCIPsetLpfeastol(), and TRUE.
Referenced by SCIPtransformProb().
| SCIP_RETCODE SCIPlpFree | ( | SCIP_LP ** | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
frees LP data object
| lp | pointer to LP data object |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9156 of file lp.c.
References BMSfreeMemory, BMSfreeMemoryArrayNull, BMSfreeMemoryNull, freeDiveChgSideArrays(), SCIP_CALL, SCIP_OKAY, SCIPlpClear(), SCIPlpiFree(), and SCIProwRelease().
Referenced by freeTransform().
| SCIP_RETCODE SCIPlpReset | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
resets the LP to the empty LP by removing all columns and rows from LP, releasing all rows, and flushing the changes to the LP solver
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9200 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::lastlpalgo, SCIP_Stat::lpcount, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpClear(), SCIPlpFlush(), SCIP_Lp::solisbasic, SCIP_Lp::solved, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by freeReoptSolve(), freeSolve(), and initSolve().
| SCIP_RETCODE SCIPlpAddCol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_COL * | col, | ||
| int | depth | ||
| ) |
adds a column to the LP and captures the variable
adds a column to the LP
| lp | LP data |
| set | global SCIP settings |
| col | LP column |
| depth | depth in the tree where the column addition is performed |
Definition at line 9231 of file lp.c.
References SCIP_Col::age, checkLinks, SCIP_Lp::cols, colUpdateAddLP(), SCIP_Lp::diving, ensureColsSize(), ensureLazycolsSize(), FALSE, SCIP_Lp::flushed, SCIP_Col::integral, SCIP_Lp::lazycols, SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Col::lb, SCIP_Col::len, SCIP_Col::lpdepth, SCIP_Col::lppos, lpUpdateObjNorms(), SCIP_Row::name, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Lp::nremovablecols, SCIP_Lp::nrows, SCIP_Col::obj, SCIP_Col::removable, SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetDebugMsgPrint, SCIPsetIsInfinity(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Col::ub, SCIP_Col::unchangedobj, SCIP_Col::vals, and SCIP_Col::var.
Referenced by forkAddLP(), pseudoforkAddLP(), SCIPpricestoreApplyVars(), and subrootConstructLP().
| SCIP_RETCODE SCIPlpAddRow | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_ROW * | row, | ||
| int | depth | ||
| ) |
adds a row to the LP and captures it
| lp | LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
| row | LP row |
| depth | depth in the tree where the row addition is performed |
Definition at line 9290 of file lp.c.
References SCIP_Row::age, checkLinks, SCIP_Row::cols, SCIP_Row::constant, ensureRowsSize(), SCIP_EventFilter::eventmask, FALSE, SCIP_Lp::flushed, SCIP_EventFilter::len, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::lpdepth, SCIP_Row::lppos, SCIP_Row::name, SCIP_Lp::ncols, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, SCIP_Row::removable, SCIP_Row::rhs, rowCalcNorms(), SCIP_Lp::rows, rowUpdateAddLP(), SCIP_CALL, SCIP_EVENTTYPE_ROWADDEDLP, SCIP_OKAY, SCIPeventCreateRowAddedLP(), SCIPeventqueueAdd(), SCIProwCapture(), SCIProwLock(), SCIPsetDebugMsg, SCIPsetDebugMsgPrint, SCIPsetIsZero(), SCIPvarGetName(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by forkAddLP(), pseudoforkAddLP(), SCIPaddRowDive(), SCIPaddRowProbing(), sepastoreApplyCut(), and subrootConstructLP().
| SCIP_RETCODE SCIPlpShrinkCols | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| int | newncols | ||
| ) |
removes all columns after the given number of columns from the LP
removes all columns after the given number of cols from the LP
| lp | LP data |
| set | global SCIP settings |
| newncols | new number of columns in the LP |
Definition at line 9414 of file lp.c.
References checkLazyColArray(), checkLinks, SCIP_Lp::cols, colUpdateDelLP(), SCIP_Lp::diving, FALSE, SCIP_Lp::flushed, SCIP_Lp::lazycols, SCIP_Col::len, SCIP_Col::lpdepth, SCIP_Lp::lpifirstchgcol, SCIP_Col::lppos, lpUpdateObjNorms(), SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Lp::nremovablecols, SCIP_Col::removable, SCIP_Col::rows, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::unchangedobj, and SCIP_Col::var.
Referenced by focusnodeCleanupVars(), focusnodeToFork(), SCIPlpClear(), SCIPtreeLoadLP(), and treeBacktrackProbing().
| SCIP_RETCODE SCIPlpShrinkRows | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| int | newnrows | ||
| ) |
removes and releases all rows after the given number of rows from the LP
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
| newnrows | new number of rows in the LP |
Definition at line 9486 of file lp.c.
References checkLinks, SCIP_Row::cols, SCIP_EventFilter::eventmask, FALSE, SCIP_Lp::flushed, SCIP_EventFilter::len, SCIP_Row::len, SCIP_Row::lpdepth, SCIP_Lp::lpifirstchgrow, SCIP_Row::lppos, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, SCIP_Row::removable, SCIP_Lp::rows, rowUpdateDelLP(), SCIP_CALL, SCIP_EVENTTYPE_ROWDELETEDLP, SCIP_OKAY, SCIPeventCreateRowDeletedLP(), SCIPeventqueueAdd(), SCIProwRelease(), SCIProwUnlock(), and SCIPsetDebugMsg.
Referenced by focusnodeToFork(), SCIPlpClear(), SCIPlpEndDive(), SCIPtreeLoadLP(), and treeBacktrackProbing().
| SCIP_RETCODE SCIPlpClear | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all columns and rows from LP, releases all rows
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9552 of file lp.c.
References SCIP_Lp::diving, SCIP_CALL, SCIP_OKAY, SCIPlpShrinkCols(), SCIPlpShrinkRows(), and SCIPsetDebugMsg.
Referenced by SCIPlpFree(), SCIPlpReset(), and SCIPtreeLoadLP().
| void SCIPlpMarkSize | ( | SCIP_LP * | lp | ) |
remembers number of columns and rows to track the newly added ones
| lp | current LP data |
Definition at line 9571 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, SCIP_Lp::ncols, and SCIP_Lp::nrows.
Referenced by SCIPnodeFocus(), SCIPtreeLoadLP(), and treeCreateProbingNode().
| void SCIPlpSetSizeMark | ( | SCIP_LP * | lp, |
| int | nrows, | ||
| int | ncols | ||
| ) |
sets the remembered number of columns and rows to the given values
| lp | current LP data |
| nrows | number of rows to set the size marker to |
| ncols | number of columns to set the size marker to |
Definition at line 9583 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, and SCIP_Lp::firstnewrow.
Referenced by treeBacktrackProbing().
| SCIP_RETCODE SCIPlpGetBasisInd | ( | SCIP_LP * | lp, |
| int * | basisind | ||
| ) |
gets all indices of basic columns and rows: index i >= 0 corresponds to column i, index i < 0 to row -i-1
| lp | LP data |
| basisind | pointer to store basis indices ready to keep number of rows entries |
Definition at line 9597 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBasisInd(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBasisInd().
| SCIP_RETCODE SCIPlpGetBase | ( | SCIP_LP * | lp, |
| int * | cstat, | ||
| int * | rstat | ||
| ) |
gets current basis status for columns and rows; arrays must be large enough to store the basis status
| lp | LP data |
| cstat | array to store column basis status, or NULL |
| rstat | array to store row basis status, or NULL |
Definition at line 9614 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBase(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
| SCIP_RETCODE SCIPlpGetBInvRow | ( | SCIP_LP * | lp, |
| int | r, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a row from the inverse basis matrix B^-1
| lp | LP data |
| r | row number |
| coef | pointer to store the coefficients of the row |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9631 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvRow(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvRow().
| SCIP_RETCODE SCIPlpGetBInvCol | ( | SCIP_LP * | lp, |
| int | c, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a column from the inverse basis matrix B^-1
| lp | LP data |
| c | column number of B^-1; this is NOT the number of the column in the LP returned by SCIPcolGetLPPos(); you have to call SCIPgetBasisInd() to get the array which links the B^-1 column numbers to the row and column numbers of the LP! c must be between 0 and nrows-1, since the basis has the size nrows * nrows |
| coef | pointer to store the coefficients of the column |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9653 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvCol(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvCol().
| SCIP_RETCODE SCIPlpGetBInvARow | ( | SCIP_LP * | lp, |
| int | r, | ||
| SCIP_Real * | binvrow, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a row from the product of inverse basis matrix B^-1 and coefficient matrix A (i.e. from B^-1 * A)
| lp | LP data |
| r | row number |
| binvrow | row in B^-1 from prior call to SCIPlpGetBInvRow(), or NULL |
| coef | pointer to store the coefficients of the row |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9679 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvARow(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvARow().
| SCIP_RETCODE SCIPlpGetBInvACol | ( | SCIP_LP * | lp, |
| int | c, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a column from the product of inverse basis matrix B^-1 and coefficient matrix A (i.e. from B^-1 * A), i.e., it computes B^-1 * A_c with A_c being the c'th column of A
| lp | LP data |
| c | column number which can be accessed by SCIPcolGetLPPos() |
| coef | pointer to store the coefficients of the column |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9704 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvACol(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvACol().
| SCIP_RETCODE SCIPlpSumRows | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real * | weights, | ||
| SCIP_REALARRAY * | sumcoef, | ||
| SCIP_Real * | sumlhs, | ||
| SCIP_Real * | sumrhs | ||
| ) |
calculates a weighted sum of all LP rows; for negative weights, the left and right hand side of the corresponding LP row are swapped in the summation
| lp | LP data |
| set | global SCIP settings |
| prob | problem data |
| weights | row weights in row summation |
| sumcoef | array to store sum coefficients indexed by variables' probindex |
| sumlhs | pointer to store the left hand side of the row summation |
| sumrhs | pointer to store the right hand side of the row summation |
Definition at line 9728 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::constant, FALSE, SCIP_Row::len, SCIP_Row::lhs, SCIP_Lp::nrows, SCIP_Prob::nvars, SCIP_Row::rhs, SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPrealarrayClear(), SCIPrealarrayExtend(), SCIPrealarrayIncVal(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIP_Row::vals, SCIP_Col::var, and SCIP_Col::var_probindex.
Referenced by SCIPsumLPRows().
| SCIP_RETCODE SCIPlpCalcMIR | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_SOL * | sol, | ||
| SCIP_Real | boundswitch, | ||
| SCIP_Bool | usevbds, | ||
| SCIP_Bool | allowlocal, | ||
| SCIP_Bool | fixintegralrhs, | ||
| int * | boundsfortrans, | ||
| SCIP_BOUNDTYPE * | boundtypesfortrans, | ||
| int | maxmksetcoefs, | ||
| SCIP_Real | maxweightrange, | ||
| SCIP_Real | minfrac, | ||
| SCIP_Real | maxfrac, | ||
| SCIP_Real * | weights, | ||
| SCIP_Real | maxweight, | ||
| int * | weightinds, | ||
| int | nweightinds, | ||
| int | rowlensum, | ||
| int * | sidetypes, | ||
| SCIP_Real | scale, | ||
| SCIP_Real * | mksetcoefs, | ||
| SCIP_Bool * | mksetcoefsvalid, | ||
| SCIP_Real * | mircoef, | ||
| SCIP_Real * | mirrhs, | ||
| SCIP_Real * | cutactivity, | ||
| SCIP_Bool * | success, | ||
| SCIP_Bool * | cutislocal, | ||
| int * | cutrank | ||
| ) |
| lp | LP data |
| set | global SCIP settings |
| stat | problem statistics |
| prob | problem data |
| sol | the solution that should be separated, or NULL for LP solution |
| boundswitch | fraction of domain up to which lower bound is used in transformation |
| usevbds | should variable bounds be used in bound transformation? |
| allowlocal | should local information allowed to be used, resulting in a local cut? |
| fixintegralrhs | should complementation tried to be adjusted such that rhs gets fractional? |
| boundsfortrans | bounds that should be used for transformed variables: vlb_idx/vub_idx, -1 for global lb/ub, -2 for local lb/ub, or -3 for using closest bound; NULL for using closest bound for all variables |
| boundtypesfortrans | type of bounds that should be used for transformed variables; NULL for using closest bound for all variables |
| maxmksetcoefs | maximal number of nonzeros allowed in aggregated base inequality |
| maxweightrange | maximal valid range max(|weights|)/min(|weights|) of row weights |
| minfrac | minimal fractionality of rhs to produce MIR cut for |
| maxfrac | maximal fractionality of rhs to produce MIR cut for |
| weights | row weights in row summation |
| maxweight | largest magnitude of weights; set to -1 if sparsity information is unknown |
| weightinds | sparsity pattern of weights; size nrowinds; NULL if sparsity info is unknown |
| nweightinds | number of nonzeros in weights; -1 if rowinds is NULL |
| rowlensum | total number of non-zeros in used rows (row associated with nonzero weight coefficient); -1 if unknown |
| sidetypes | specify row side type (-1 = lhs, 0 = unkown, 1 = rhs) or NULL for automatic choices |
| scale | additional scaling factor multiplied to all rows |
| mksetcoefs | array to store mixed knapsack set coefficients: size nvars; or NULL |
| mksetcoefsvalid | pointer to store whether mixed knapsack set coefficients are valid; or NULL |
| mircoef | array to store MIR coefficients: must be of size nvars |
| mirrhs | pointer to store the right hand side of the MIR row |
| cutactivity | pointer to store the activity of the resulting cut |
| success | pointer to store whether the returned coefficients are a valid MIR cut |
| cutislocal | pointer to store whether the returned cut is only valid locally |
| cutrank | pointer to store the rank of the returned cut; or NULL |
| SCIP_RETCODE SCIPlpCalcStrongCG | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real | boundswitch, | ||
| SCIP_Bool | usevbds, | ||
| SCIP_Bool | allowlocal, | ||
| int | maxmksetcoefs, | ||
| SCIP_Real | maxweightrange, | ||
| SCIP_Real | minfrac, | ||
| SCIP_Real | maxfrac, | ||
| SCIP_Real * | weights, | ||
| int * | rowinds, | ||
| int | nrowinds, | ||
| SCIP_Real | scale, | ||
| SCIP_Real * | strongcgcoef, | ||
| SCIP_Real * | strongcgrhs, | ||
| SCIP_Real * | cutactivity, | ||
| SCIP_Bool * | success, | ||
| SCIP_Bool * | cutislocal, | ||
| int * | cutrank | ||
| ) |
| lp | LP data |
| set | global SCIP settings |
| stat | problem statistics |
| prob | problem data |
| boundswitch | fraction of domain up to which lower bound is used in transformation |
| usevbds | should variable bounds be used in bound transformation? |
| allowlocal | should local information allowed to be used, resulting in a local cut? |
| maxmksetcoefs | maximal number of nonzeros allowed in aggregated base inequality |
| maxweightrange | maximal valid range max(|weights|)/min(|weights|) of row weights |
| minfrac | minimal fractionality of rhs to produce strong CG cut for |
| maxfrac | maximal fractionality of rhs to produce strong CG cut for |
| weights | row weights in row summation |
| rowinds | array to store indices of non-zero entries of the weights array, or NULL |
| nrowinds | number of non-zero entries in weights array, -1 if rowinds is NULL |
| scale | additional scaling factor multiplied to all rows |
| strongcgcoef | array to store strong CG coefficients: must be of size nvars |
| strongcgrhs | pointer to store the right hand side of the strong CG row |
| cutactivity | pointer to store the activity of the resulting cut |
| success | pointer to store whether the returned coefficients are a valid strong CG cut |
| cutislocal | pointer to store whether the returned cut is only valid locally |
| cutrank | pointer to store the rank of the returned cut; or NULL |
| SCIP_RETCODE SCIPlpGetState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
stores LP state (like basis information) into LP state object
| lp | LP data |
| blkmem | block memory |
| lpistate | pointer to LP state information (like basis information) |
Definition at line 9814 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_CALL, SCIP_OKAY, SCIPlpiGetState(), and SCIP_Lp::solved.
Referenced by forkCreate(), forkFree(), probingnodeUpdate(), and SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpSetState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LPISTATE * | lpistate, | ||
| SCIP_Bool | wasprimfeas, | ||
| SCIP_Bool | wasprimchecked, | ||
| SCIP_Bool | wasdualfeas, | ||
| SCIP_Bool | wasdualchecked | ||
| ) |
loads LP state (like basis information) into solver
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lpistate | LP state information (like basis information) |
| wasprimfeas | primal feasibility when LP state information was stored |
| wasprimchecked | true if the LP solution has passed the primal feasibility check |
| wasdualfeas | dual feasibility when LP state information was stored |
| wasdualchecked | true if the LP solution has passed the dual feasibility check |
Definition at line 9838 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_OKAY, SCIPlpFlush(), SCIPlpiHasStateBasis(), SCIPlpiSetState(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPlpEndDive(), SCIPtreeEndProbing(), SCIPtreeLoadLPState(), and SCIPtreeLoadProbingLPState().
| SCIP_RETCODE SCIPlpFreeState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
frees LP state information
| lp | LP data |
| blkmem | block memory |
| lpistate | pointer to LP state information (like basis information) |
Definition at line 9880 of file lp.c.
References SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeState().
Referenced by forkReleaseLPIState(), probingnodeFree(), probingnodeUpdate(), SCIPlpEndDive(), SCIPtreeEndProbing(), SCIPtreeSetProbingLPState(), and subrootReleaseLPIState().
| SCIP_RETCODE SCIPlpGetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
stores pricing norms into LP norms object
| lp | LP data |
| blkmem | block memory |
| lpinorms | pointer to LP pricing norms information |
Definition at line 9897 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_CALL, SCIP_OKAY, SCIPlpiGetNorms(), and SCIP_Lp::solved.
Referenced by probingnodeUpdate(), and SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpSetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS * | lpinorms | ||
| ) |
loads pricing norms from LP norms object into solver
| lp | LP data |
| blkmem | block memory |
| lpinorms | LP pricing norms information |
Definition at line 9921 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, and SCIPlpiSetNorms().
Referenced by SCIPtreeEndProbing(), and SCIPtreeLoadProbingLPState().
| SCIP_RETCODE SCIPlpFreeNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
frees pricing norms information
| lp | LP data |
| blkmem | block memory |
| lpinorms | pointer to LP pricing norms information |
Definition at line 9941 of file lp.c.
References SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeNorms().
Referenced by probingnodeFree(), probingnodeUpdate(), SCIPtreeEndProbing(), and SCIPtreeSetProbingLPState().
return the current cutoff bound of the lp
| lp | current LP data |
Definition at line 9955 of file lp.c.
References SCIP_Lp::cutoffbound.
Referenced by SCIPreoptCheckCutoff().
| SCIP_RETCODE SCIPlpSetCutoffbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real | cutoffbound | ||
| ) |
sets the upper objective limit of the LP solver
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
| cutoffbound | new upper objective limit |
Definition at line 9965 of file lp.c.
References SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, lpCutoffDisabled, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpDivingObjChanged(), SCIPlpGetObjval(), SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIPsetIsInfinity(), and SCIP_Lp::solved.
Referenced by primalSetCutoffbound(), SCIPchgCutoffboundDive(), SCIPchgVarObjDive(), SCIPchgVarObjProbing(), SCIPendDive(), and treeBacktrackProbing().
| SCIP_RETCODE SCIPlpFlush | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue | ||
| ) |
applies all cached changes to the LP solver
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
Definition at line 8477 of file lp.c.
References checkLinks, SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushaddedcols, SCIP_Lp::flushaddedrows, SCIP_Lp::flushdeletedcols, SCIP_Lp::flushdeletedrows, SCIP_Lp::flushed, lpFlushAddCols(), lpFlushAddRows(), lpFlushChgCols(), lpFlushChgRows(), lpFlushDelCols(), lpFlushDelRows(), SCIP_Lp::lpi, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Lp::lpiobjlim, SCIP_Lp::nchgcols, SCIP_Lp::nchgrows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, SCIP_CALL, SCIP_OKAY, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPsetDebugMsg, SCIP_Lp::solved, and TRUE.
Referenced by focusnodeCleanupVars(), lpFlushAndSolve(), priceAndCutLoop(), SCIPflushLP(), SCIPlpEndDive(), SCIPlpReset(), SCIPlpSetState(), SCIPlpSolveAndEval(), SCIPtreeEndProbing(), SCIPwriteLP(), and SCIPwriteMIP().
| SCIP_RETCODE SCIPlpMarkFlushed | ( | SCIP_LP * | lp, |
| SCIP_SET * | set | ||
| ) |
marks the LP to be flushed, even if the LP thinks it is not flushed
| lp | current LP data |
| set | global SCIP settings |
Definition at line 8535 of file lp.c.
References checkLinks, SCIP_Lp::chgcols, SCIP_Lp::chgrows, SCIP_Col::coefchanged, SCIP_Row::coefchanged, SCIP_Lp::cols, SCIP_Row::constant, FALSE, SCIP_Lp::flushed, SCIP_Col::flushedlb, SCIP_Row::flushedlhs, SCIP_Col::flushedobj, SCIP_Row::flushedrhs, SCIP_Col::flushedub, SCIP_Col::lb, SCIP_Col::lbchanged, SCIP_Row::lhs, SCIP_Row::lhschanged, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Col::lpipos, SCIP_Row::lpipos, SCIP_Lp::lpirows, SCIP_Lp::nchgcols, SCIP_Lp::nchgrows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_Row::rhs, SCIP_Row::rhschanged, SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPlpiGetBounds(), SCIPlpiGetObj(), SCIPlpiGetSides(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPsetIsInfinity(), SCIPsetIsSumEQ(), SCIPvarGetCol(), SCIPvarGetStatus(), TRUE, SCIP_Col::ub, SCIP_Col::ubchanged, and SCIP_Col::var.
| SCIP_RETCODE SCIPlpSolveAndEval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| BMS_BLKMEM * | blkmem, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Longint | itlim, | ||
| SCIP_Bool | limitresolveiters, | ||
| SCIP_Bool | aging, | ||
| SCIP_Bool | keepsol, | ||
| SCIP_Bool * | lperror | ||
| ) |
solves the LP with simplex algorithm, and copy the solution into the column's data
| lp | LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| blkmem | block memory buffers |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| prob | problem data |
| itlim | maximal number of LP iterations to perform, or -1 for no limit |
| limitresolveiters | should LP iterations for resolving calls be limited? (limit is computed within the method w.r.t. the average LP iterations) |
| aging | should aging and removal of obsolete cols/rows be applied? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 12045 of file lp.c.
References checkLazyBounds(), SCIP_Lp::cutoffbound, SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushaddedcols, SCIP_Lp::flushdeletedcols, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::lastlpalgo, lpCutoffDisabled, lpFlushAndSolve(), lpGetResolveItlim(), SCIP_Lp::lpi, SCIP_Lp::lpifromscratch, SCIP_Lp::lpihasfastmip, SCIP_Lp::lpiobjlim, lpNumericalTroubleMessage(), SCIP_Lp::lpobjval, lpSetFromscratch(), SCIP_Lp::lpsolstat, lpSolve(), SCIP_Stat::nclockskipsleft, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Lp::nrows, SCIP_Prob::nvars, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Lp::probing, SCIP_Bool, SCIP_CALL, SCIP_ERROR, SCIP_Longint, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_LPERROR, SCIP_LPSOLSTAT_ERROR, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIP_STATUS_TIMELIMIT, SCIP_VERBLEVEL_FULL, SCIP_VERBLEVEL_HIGH, SCIPerrorMessage, SCIPlpFlush(), SCIPlpGetDualfarkas(), SCIPlpGetLPI(), SCIPlpGetSol(), SCIPlpGetSolstat(), SCIPlpGetUnboundedSol(), SCIPlpiGetObjval(), SCIPlpiHasDualRay(), SCIPlpiInfinity(), SCIPlpiIsObjlimExc(), SCIPlpRemoveNewObsoletes(), SCIPlpUpdateAges(), SCIPmessagePrintVerbInfo(), SCIPmessagePrintWarning(), SCIPprobAllColsInLP(), SCIPsetDebugMsg, SCIPsetGetCharParam(), SCIPsetInfinity(), SCIPsetIsFeasNegative(), SCIPsetIsGE(), SCIPsetIsLT(), SCIPsetSetCharParam(), SCIPsolveIsStopped(), SCIP_Lp::solved, SCIP_Stat::status, TRUE, and updateLazyBounds().
Referenced by focusnodeToFork(), priceAndCutLoop(), SCIPlpEndDive(), SCIPpriceLoop(), SCIPsolveDiveLP(), SCIPtreeEndProbing(), separationRoundResolveLP(), solveNodeInitialLP(), solveNodeLP(), and solveProbingLP().
| SCIP_LPSOLSTAT SCIPlpGetSolstat | ( | SCIP_LP * | lp | ) |
gets solution status of current LP
| lp | current LP data |
Definition at line 12612 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpsolstat, SCIP_LPSOLSTAT_NOTSOLVED, and SCIP_Lp::solved.
Referenced by branchcandCalcLPCands(), conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), enforceConstraints(), focusnodeToFork(), forkCreate(), forkFree(), nodeToLeaf(), priceAndCutLoop(), propAndSolve(), SCIPconflictAnalyzeLP(), SCIPcutpoolAddNewRow(), SCIPgetLPBranchCands(), SCIPgetLPSolstat(), SCIPgetNLPBranchCands(), SCIPgetNPrioLPBranchCands(), SCIPlpCleanupAll(), SCIPlpCleanupNew(), SCIPlpEndDive(), SCIPlpGetSol(), SCIPlpRemoveAllObsoletes(), SCIPlpRemoveNewObsoletes(), SCIPlpSetCutoffbound(), SCIPlpSolveAndEval(), SCIPlpStartDive(), SCIPnodeCutoff(), SCIPnodeFocus(), SCIPnodepqBound(), SCIPpriceLoop(), SCIPpricerExec(), SCIPpricestoreAddProbVars(), SCIPprobUpdateBestRootSol(), SCIPreoptCheckCutoff(), SCIPsolveCIP(), SCIPsolveDiveLP(), SCIPtreeCutoff(), SCIPtreeEndProbing(), SCIPtreeStartProbing(), separationRoundLP(), solveNode(), solveNodeInitialLP(), solveNodeLP(), solveProbingLP(), updateEstimate(), updatePrimalRay(), and updatePseudocost().
sets whether the root LP is a relaxation of the problem and its optimal objective value is a global lower bound
sets whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
| lp | LP data |
| isrelax | is the root lp a relaxation of the problem? |
Definition at line 16861 of file lp.c.
References SCIP_Lp::rootlpisrelax.
Referenced by SCIPprobStoreRootSol().
returns whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
| lp | LP data |
Definition at line 16872 of file lp.c.
References SCIP_Lp::rootlpisrelax.
Referenced by SCIPisRootLPRelax().
gets objective value of current LP
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12628 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalid, SCIP_Lp::looseobjvalinf, SCIP_Lp::lpobjval, SCIP_Lp::nloosevars, recomputeLooseObjectiveValue(), SCIP_INVALID, SCIPsetInfinity(), SCIPsetIsInfinity(), and SCIP_Lp::solved.
Referenced by addCurrentSolution(), analyzeStrongbranch(), enforceConstraints(), forkCreate(), forkFree(), priceAndCutLoop(), propAndSolve(), SCIPcolGetStrongbranch(), SCIPcolGetStrongbranches(), SCIPgetLPObjval(), SCIPgetSolOrigObj(), SCIPgetSolTransObj(), SCIPlpSetCutoffbound(), SCIPnodeUpdateLowerboundLP(), SCIPprobUpdateBestRootSol(), SCIPsolLinkLPSol(), SCIPsolveCIP(), solveNode(), solveNodeInitialLP(), solveNodeLP(), and updatePseudocost().
gets part of objective value of current LP that results from COLUMN variables only
| lp | current LP data |
Definition at line 12656 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpobjval, SCIP_INVALID, and SCIP_Lp::solved.
Referenced by SCIPgetLPColumnObjval(), SCIPlpStoreRootObjval(), and SCIPprobStoreRootSol().
gets part of objective value of current LP that results from LOOSE variables only
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12667 of file lp.c.
References SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, SCIP_INVALID, SCIPsetInfinity(), and SCIP_Lp::solved.
Referenced by performStrongbranchWithPropagation(), SCIPgetLPLooseObjval(), SCIPlpStoreRootObjval(), and SCIPsolLinkLPSol().
remembers the current LP objective value as root solution value
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12687 of file lp.c.
References SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, SCIPlpGetColumnObjval(), and SCIPlpGetLooseObjval().
Referenced by SCIPprobStoreRootSol().
| void SCIPlpInvalidateRootObjval | ( | SCIP_LP * | lp | ) |
invalidates the root LP solution value
| lp | current LP data |
Definition at line 12700 of file lp.c.
References SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by freeReoptSolve(), and freeSolve().
gets the global pseudo objective value; that is all variables set to their best (w.r.t. the objective function) global bound
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12779 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, recomputeGlbPseudoObjectiveValue(), SCIPsetInfinity(), and SCIPsetIsInfinity().
Referenced by SCIPgetGlobalPseudoObjval(), and solveNode().
recomputes local and global pseudo objective values
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12711 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, SCIP_Prob::nvars, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, SCIP_Lp::relglbpseudoobjval, SCIP_Lp::relpseudoobjval, SCIP_Real, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), TRUE, and SCIP_Prob::vars.
Referenced by prepareReoptimization(), and treeBacktrackProbing().
gets the pseudo objective value for the current search node; that is all variables set to their best (w.r.t. the objective function) local bound
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12811 of file lp.c.
References SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, recomputePseudoObjectiveValue(), SCIPsetInfinity(), and SCIPsetIsInfinity().
Referenced by applyBounding(), enforceConstraints(), SCIPconflictAnalyzePseudo(), SCIPgetPseudoObjval(), SCIPgetSolOrigObj(), SCIPgetSolTransObj(), SCIPprimalHeuristics(), SCIPsolLinkPseudoSol(), and solveNode().
| SCIP_Real SCIPlpGetModifiedPseudoObjval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldbound, | ||
| SCIP_Real | newbound, | ||
| SCIP_BOUNDTYPE | boundtype | ||
| ) |
gets pseudo objective value, if a bound of the given variable would be modified in the given way
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
| var | problem variable |
| oldbound | old value for bound |
| newbound | new value for bound |
| boundtype | type of bound: lower or upper bound |
Definition at line 12841 of file lp.c.
References getFinitePseudoObjval(), SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetBestBoundType(), and SCIPvarGetObj().
Referenced by SCIPnodeAddBoundinfer().
| SCIP_Real SCIPlpGetModifiedProvedPseudoObjval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldbound, | ||
| SCIP_Real | newbound, | ||
| SCIP_BOUNDTYPE | boundtype | ||
| ) |
gets pseudo objective value, if a bound of the given variable would be modified in the given way; perform calculations with interval arithmetic to get an exact lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable |
| oldbound | old value for bound |
| newbound | new value for bound |
| boundtype | type of bound: lower or upper bound |
Definition at line 12881 of file lp.c.
References SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Real, SCIPintervalAdd(), SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPintervalSub(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetBestBoundType(), and SCIPvarGetObj().
Referenced by SCIPnodeAddBoundinfer().
| SCIP_RETCODE SCIPlpUpdateVarObj | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldobj, | ||
| SCIP_Real | newobj | ||
| ) |
updates current pseudo and loose objective value for a change in a variable's objective value
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldobj | old objective value of variable |
| newobj | new objective value of variable |
Definition at line 13348 of file lp.c.
References FALSE, getObjvalDeltaObj(), lpUpdateObjval(), lpUpdateVarProved(), SCIP_Lp::probing, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPeventProcess(), SCIPlpUpdateAddVar(), and SCIPlpUpdateDelVar().
| SCIP_RETCODE SCIPlpUpdateVarLbGlobal | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldlb, | ||
| SCIP_Real | newlb | ||
| ) |
updates current root pseudo objective value for a global change in a variable's lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldlb | old lower bound of variable |
| newlb | new lower bound of variable |
Definition at line 13402 of file lp.c.
References FALSE, getObjvalDeltaLb(), lpUpdateObjval(), SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsPositive(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarLb | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldlb, | ||
| SCIP_Real | newlb | ||
| ) |
updates current pseudo and loose objective value for a change in a variable's lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldlb | old lower bound of variable |
| newlb | new lower bound of variable |
Definition at line 13430 of file lp.c.
References FALSE, getObjvalDeltaLb(), lpUpdateObjval(), lpUpdateVarProved(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPsetIsPositive(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarUbGlobal | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldub, | ||
| SCIP_Real | newub | ||
| ) |
updates current root pseudo objective value for a global change in a variable's upper bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldub | old upper bound of variable |
| newub | new upper bound of variable |
Definition at line 13471 of file lp.c.
References FALSE, getObjvalDeltaUb(), lpUpdateObjval(), SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarUb | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldub, | ||
| SCIP_Real | newub | ||
| ) |
updates current pseudo objective value for a change in a variable's upper bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldub | old upper bound of variable |
| newub | new upper bound of variable |
Definition at line 13498 of file lp.c.
References FALSE, getObjvalDeltaUb(), lpUpdateObjval(), lpUpdateVarProved(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateAddVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable was added to the problem
| lp | current LP data |
| set | global SCIP settings |
| var | variable that is now a LOOSE problem variable |
Definition at line 13539 of file lp.c.
References SCIP_Lp::nloosevars, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPlpUpdateVarObj(), SCIPvarGetObj(), SCIPvarGetProbindex(), and SCIPvarGetStatus().
Referenced by SCIPprobAddVar().
| SCIP_RETCODE SCIPlpUpdateDelVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable is to be deleted from the problem
| lp | current LP data |
| set | global SCIP settings |
| var | variable that will be deleted from the problem |
Definition at line 13560 of file lp.c.
References SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPlpDecNLoosevars(), SCIPlpUpdateVarObj(), SCIPvarGetObj(), SCIPvarGetProbindex(), and SCIPvarGetStatus().
Referenced by SCIPprobPerformVarDeletions().
| SCIP_RETCODE SCIPlpUpdateVarColumn | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given formerly loose problem variable is now a column variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from LOOSE to COLUMN |
Definition at line 13696 of file lp.c.
References lpUpdateVarColumn(), lpUpdateVarColumnProved(), SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarColumn().
| SCIP_RETCODE SCIPlpUpdateVarLoose | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given formerly column problem variable is now again a loose variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from COLUMN to LOOSE |
Definition at line 13820 of file lp.c.
References lpUpdateVarLoose(), lpUpdateVarLooseProved(), SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarLoose().
| void SCIPlpDecNLoosevars | ( | SCIP_LP * | lp | ) |
decrease the number of loose variables by one
| lp | current LP data |
Definition at line 13841 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, and SCIP_Lp::nloosevars.
Referenced by lpUpdateVarColumn(), SCIPlpUpdateDelVar(), SCIPvarFix(), and SCIPvarMultiaggregate().
| SCIP_RETCODE SCIPlpGetSol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_Bool * | primalfeasible, | ||
| SCIP_Bool * | dualfeasible | ||
| ) |
stores the LP solution in the columns and rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| primalfeasible | pointer to store whether the solution is primal feasible, or NULL |
| dualfeasible | pointer to store whether the solution is dual feasible, or NULL |
Definition at line 13859 of file lp.c.
References SCIP_Row::activity, SCIP_Col::basisstatus, SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Row::constant, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, MAX, SCIP_Col::maxprimsol, SCIP_Col::minprimsol, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Col::obj, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_BASESTAT_BASIC, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_LPALGO_BARRIER, SCIP_OKAY, SCIP_Real, SCIPlpGetSolstat(), SCIPlpiGetBase(), SCIPlpiGetSol(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsDualfeasNegative(), SCIPsetIsDualfeasPositive(), SCIPsetIsFeasGE(), SCIPsetIsFeasGT(), SCIPsetIsFeasLE(), SCIPsetIsFeasLT(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPsetIsInfinity(), SCIPvarGetName(), SCIP_Lp::solisbasic, SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetUnboundedSol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_Bool * | primalfeasible, | ||
| SCIP_Bool * | rayfeasible | ||
| ) |
stores LP solution with infinite objective value in the columns and rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| primalfeasible | pointer to store whether the solution is primal feasible, or NULL |
| rayfeasible | pointer to store whether the primal ray is a feasible unboundedness proof, or NULL |
Definition at line 14153 of file lp.c.
References SCIP_Row::activity, SCIP_Row::constant, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, MAX, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Col::obj, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_CALL, SCIP_INVALID, SCIP_Longint, SCIP_LPERROR, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPlpiGetPrimalRay(), SCIPlpiGetSol(), SCIPlpiHasPrimalRay(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasGE(), SCIPsetIsFeasLE(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetPrimalRay | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | ray | ||
| ) |
returns primal ray proving the unboundedness of the current LP
| lp | current LP data |
| set | global SCIP settings |
| ray | array for storing primal ray values, they are stored w.r.t. the problem index of the variables, so the size of this array should be at least number of active variables (all entries have to be initialized to 0 before) |
Definition at line 14326 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_Lp::nlpicols, SCIP_CALL, SCIP_LPERROR, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPlpiGetPrimalRay(), SCIPlpiHasPrimalRay(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsInfinity(), SCIPvarGetProbindex(), SCIP_Lp::solved, and SCIP_Col::var.
Referenced by updatePrimalRay().
| SCIP_RETCODE SCIPlpGetDualfarkas | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat | ||
| ) |
stores the dual Farkas multipliers for infeasibility proof in rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 14383 of file lp.c.
References SCIP_Row::activity, SCIP_Row::basisstatus, SCIP_Row::dualfarkas, SCIP_Row::dualsol, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpsolstat, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPlpiGetDualfarkas(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIP_Lp::solved, SCIP_Row::validactivitylp, SCIP_Col::validfarkaslp, SCIP_Lp::validfarkaslp, and SCIP_Col::validredcostlp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetIterations | ( | SCIP_LP * | lp, |
| int * | iterations | ||
| ) |
get number of iterations used in last LP solve
| lp | current LP data |
| iterations | pointer to store the iteration count |
Definition at line 14449 of file lp.c.
References SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, and SCIPlpiGetIterations().
Referenced by lpBarrier(), lpDualSimplex(), lpLexDualSimplex(), and lpPrimalSimplex().
| SCIP_RETCODE SCIPlpUpdateAges | ( | SCIP_LP * | lp, |
| SCIP_STAT * | stat | ||
| ) |
increases age of columns with solution value 0.0 and rows with activity not at its bounds, resets age of non-zero columns and sharp rows
increases age of columns with solution value 0.0 and basic rows with activity not at its bounds, resets age of non-zero columns and sharp rows
| lp | current LP data |
| stat | problem statistics |
Definition at line 14464 of file lp.c.
References SCIP_Row::activeinlpcounter, SCIP_Col::age, SCIP_Row::age, SCIP_Lp::cols, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Row::nlpsaftercreation, SCIP_Lp::nrows, SCIP_Lp::rows, SCIP_OKAY, SCIPdebugMessage, SCIP_Lp::solved, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval().
| SCIP_RETCODE SCIPlpRemoveNewObsoletes | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all non-basic columns and basic rows in the part of the LP created at the current node, that are too old
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 14873 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, lpRemoveObsoleteCols(), lpRemoveObsoleteRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, and SCIP_Lp::solved.
Referenced by SCIPlpSolveAndEval().
| SCIP_RETCODE SCIPlpRemoveAllObsoletes | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all non-basic columns and basic rows in whole LP, that are too old
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 14904 of file lp.c.
References SCIP_Lp::diving, lpRemoveObsoleteCols(), lpRemoveObsoleteRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
| SCIP_RETCODE SCIPlpCleanupNew | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_Bool | root | ||
| ) |
removes all non-basic columns at 0.0 and basic rows in the part of the LP created at the current node
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| root | are we at the root node? |
Definition at line 15073 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, SCIP_Lp::lastlpalgo, lpCleanupCols(), lpCleanupRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
| SCIP_RETCODE SCIPlpCleanupAll | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_Bool | root | ||
| ) |
removes all non-basic columns at 0.0 and basic rows in the whole LP
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| root | are we at the root node? |
Definition at line 15112 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::lastlpalgo, lpCleanupCols(), lpCleanupRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
| SCIP_RETCODE SCIPlpRemoveRedundantRows | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all redundant rows that were added at the current node
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 15151 of file lp.c.
References SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Lp::diving, SCIP_Lp::firstnewrow, SCIP_Lp::flushed, SCIP_Stat::lpcount, lpDelRowset(), SCIP_Lp::lpirows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, SCIP_Lp::rows, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIProwGetLhs(), SCIProwGetMaxActivity(), SCIProwGetMinActivity(), SCIProwGetName(), SCIProwGetRhs(), SCIProwIsRedundant(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIP_Lp::solisbasic, and SCIP_Lp::validsollp.
Referenced by priceAndCutLoop().
| SCIP_RETCODE SCIPlpStartDive | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat | ||
| ) |
initiates LP diving
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 15225 of file lp.c.
References SCIP_Lp::cols, colStoreSolVals(), SCIP_Lp::divelpistate, SCIP_Lp::divelpwasdualchecked, SCIP_Lp::divelpwasdualfeas, SCIP_Lp::divelpwasprimchecked, SCIP_Lp::divelpwasprimfeas, SCIP_Lp::divenolddomchgs, SCIP_Lp::diving, SCIP_Lp::divinglpiitlim, SCIP_Stat::domchgcount, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_LpSolVals::lpsolstat, SCIP_Lp::lpsolstat, lpStoreSolVals(), SCIP_Lp::ncols, SCIP_Lp::ndivechgsides, SCIP_Lp::ndivingrows, SCIP_Lp::nrows, SCIP_Col::obj, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Lp::probing, SCIP_Lp::rows, rowStoreSolVals(), SCIP_Bool, SCIP_CALL, SCIP_LPPAR_LPITLIM, SCIP_LPSOLSTAT_ERROR, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPlpGetDualfarkas(), SCIPlpGetSol(), SCIPlpGetSolstat(), SCIPlpGetUnboundedSol(), SCIPlpiGetIntpar(), SCIPlpiGetState(), SCIPsetDebugMsg, SCIPsetIsFeasEQ(), SCIPvarGetCol(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), SCIP_Lp::solved, SCIP_Lp::storedsolvals, TRUE, SCIP_Col::ub, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPstartDive().
| SCIP_RETCODE SCIPlpEndDive | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_PROB * | prob, | ||
| SCIP_VAR ** | vars, | ||
| int | nvars | ||
| ) |
quits LP diving and resets bounds and objective values of columns to the current node's values
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| prob | problem data |
| vars | array with all active variables |
| nvars | number of active variables |
Definition at line 15331 of file lp.c.
References colRestoreSolVals(), SCIP_Lp::cols, SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidetypes, SCIP_Lp::divelpistate, SCIP_Lp::divelpwasdualchecked, SCIP_Lp::divelpwasdualfeas, SCIP_Lp::divelpwasprimchecked, SCIP_Lp::divelpwasprimfeas, SCIP_Lp::divenolddomchgs, SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Lp::divinglpiitlim, SCIP_Lp::divingobjchg, SCIP_Stat::domchgcount, FALSE, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Stat::lpcount, SCIP_LpSolVals::lpissolved, lpNumericalTroubleMessage(), lpRestoreSolVals(), lpSetIterationLimit(), SCIP_LpSolVals::lpsolstat, SCIP_Lp::ncols, SCIP_Lp::ndivechgsides, SCIP_Lp::ndivingrows, SCIP_Lp::nlazycols, SCIP_Lp::nrows, SCIP_Col::obj, SCIP_Lp::resolvelperror, rowRestoreSolVals(), SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_VARSTATUS_COLUMN, SCIP_VERBLEVEL_FULL, SCIPcolChgLb(), SCIPcolChgObj(), SCIPcolChgUb(), SCIPlpFlush(), SCIPlpFreeState(), SCIPlpGetSolstat(), SCIPlpSetState(), SCIPlpShrinkRows(), SCIPlpSolveAndEval(), SCIPmessagePrintVerbInfo(), SCIProwChgLhs(), SCIProwChgRhs(), SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), SCIP_Lp::storedsolvals, TRUE, SCIP_Col::ub, updateLazyBounds(), and SCIP_Col::var.
Referenced by SCIPendDive().
| SCIP_RETCODE SCIPlpRecordOldRowSideDive | ( | SCIP_LP * | lp, |
| SCIP_ROW * | row, | ||
| SCIP_SIDETYPE | sidetype | ||
| ) |
records a current row side such that any change will be undone after diving
| lp | LP data object |
| row | row affected by the change |
| sidetype | side type |
Definition at line 15513 of file lp.c.
References SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidessize, SCIP_Lp::divechgsidetypes, DIVESTACKGROWFACT, SCIP_Row::lhs, SCIP_Lp::ndivechgsides, reallocDiveChgSideArrays(), SCIP_Row::rhs, SCIP_CALL, SCIP_OKAY, and SCIP_SIDETYPE_LEFT.
Referenced by SCIPchgRowLhsDive(), and SCIPchgRowRhsDive().
| SCIP_RETCODE SCIPlpStartProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was initiated
| lp | current LP data |
Definition at line 15537 of file lp.c.
References SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpEndProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was finished
| lp | current LP data |
Definition at line 15552 of file lp.c.
References FALSE, SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPtreeEndProbing().
| void SCIPlpStartStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is now used for strongbranching
| lp | current LP data |
Definition at line 15567 of file lp.c.
References SCIP_Lp::probing, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPstartStrongbranch().
| void SCIPlpEndStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is not used for strongbranching anymore
| lp | current LP data |
Definition at line 15580 of file lp.c.
References FALSE, SCIP_Lp::probing, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPendStrongbranch().
| SCIP_RETCODE SCIPlpGetProvedLowerbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | bound | ||
| ) |
gets proven lower (dual) bound of last LP solution
| lp | current LP data |
| set | global SCIP settings |
| bound | pointer to store proven dual bound |
Definition at line 15713 of file lp.c.
References FALSE, provedBound(), SCIP_CALL, SCIP_OKAY, and SCIPsetDebugMsg.
Referenced by SCIPnodeUpdateLowerboundLP(), and solveNodeInitialLP().
| SCIP_RETCODE SCIPlpIsInfeasibilityProved | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Bool * | proved | ||
| ) |
gets proven dual bound of last LP solution
| lp | current LP data |
| set | global SCIP settings |
| proved | pointer to store whether infeasibility is proven |
Definition at line 15727 of file lp.c.
References bound, provedBound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPsetDebugMsg, and TRUE.
| SCIP_RETCODE SCIPlpWrite | ( | SCIP_LP * | lp, |
| const char * | fname | ||
| ) |
writes LP to a file
| lp | current LP data |
| fname | file name |
Definition at line 15749 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_CALL, SCIP_OKAY, and SCIPlpiWriteLP().
Referenced by lpBarrier(), lpDualSimplex(), lpPrimalSimplex(), and SCIPwriteLP().
| SCIP_RETCODE SCIPlpWriteMip | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| const char * | fname, | ||
| SCIP_Bool | genericnames, | ||
| SCIP_Bool | origobj, | ||
| SCIP_OBJSENSE | objsense, | ||
| SCIP_Real | objscale, | ||
| SCIP_Real | objoffset, | ||
| SCIP_Bool | lazyconss | ||
| ) |
writes MIP to a file
writes MIP relaxation of the current B&B node to a file
| lp | current LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| fname | file name |
| genericnames | should generic names like x_i and row_j be used in order to avoid troubles with reserved symbols? |
| origobj | should the original objective function be used? |
| objsense | objective sense |
| objscale | objective scaling factor |
| objoffset | objective offset, e.g., caused by variable fixings in presolving |
| lazyconss | output removable rows as lazy constraints? |
Definition at line 15764 of file lp.c.
References SCIP_Row::cols, SCIP_Lp::cols, SCIP_Row::constant, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Col::lppos, SCIP_Row::lppos, SCIP_Row::name, SCIP_Var::name, SCIP_Lp::ncols, SCIP_Row::nlpcols, SCIP_Lp::nrows, SCIP_Col::obj, REALABS, SCIP_Row::rhs, SCIP_Lp::rows, SCIP_ERROR, SCIP_FILECREATEERROR, SCIP_MAXSTRLEN, SCIP_OBJSENSE_MINIMIZE, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPmessageFPrintInfo(), SCIPmessagePrintWarning(), SCIPprintSysError(), SCIProwIsRemovable(), SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsnprintf(), SCIPvarIsIntegral(), SCIP_Col::ub, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPwriteMIP().
recalculates Euclidean norm of objective function vector of column variables if it have gotten unreliable during calculation
| set | global SCIP settings |
| lp | LP data |
Definition at line 16818 of file lp.c.
References SCIP_Lp::cols, FALSE, MAX, SCIP_Lp::ncols, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, and SCIPsetIsGE().
Referenced by SCIPgetObjNorm(), and SCIProwGetObjParallelism().
| SCIP_RETCODE SCIPlpComputeRelIntPoint | ( | SCIP_SET * | set, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_LP * | lp, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Bool | relaxrows, | ||
| SCIP_Bool | inclobjcutoff, | ||
| SCIP_Real | timelimit, | ||
| int | iterlimit, | ||
| SCIP_Real * | point, | ||
| SCIP_Bool * | success | ||
| ) |
compute relative interior point
compute relative interior point
We use the approach of
to compute a relative interior point for the current LP.
Assume the original LP looks as follows:
\[ \begin{array}{rrl} \min & c^T x &\\ & A x & \geq a\\ & B x & \leq b\\ & D x & = d. \end{array} \]
Note that bounds should be included in the system.
To find an interior point the following LP does the job:
\[ \begin{array}{rrl} \max & 1^T y &\\ & A x - y - \alpha a & \geq 0\\ & B x + y - \alpha b & \leq 0\\ & D x - \alpha d & = 0\\ & 0 \leq y & \leq 1\\ & \alpha & \geq 1. \end{array} \]
If the original LP is feasible, this LP is feasible as well. Any optimal solution yields the relative interior point \(x^*_j/\alpha^*\). Note that this will just produce some relative interior point. It does not produce a particular relative interior point, e.g., one that maximizes the distance to the boundary in some norm.
| set | global SCIP settings |
| messagehdlr | message handler |
| lp | LP data |
| prob | problem data |
| relaxrows | should the rows be relaxed |
| inclobjcutoff | should a row for the objective cutoff be included |
| timelimit | time limit for LP solver |
| iterlimit | iteration limit for LP solver |
| point | array to store relative interior point on exit |
| success | buffer to indicate whether interior point was successfully computed |
Definition at line 17737 of file lp.c.
References BMSclearMemoryArray, computeRelIntPoint(), SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::ncols, SCIP_Lp::nrows, SCIP_CALL, SCIP_INVALID, SCIP_OBJSEN_MAXIMIZE, SCIP_OKAY, SCIPlpiCreate(), SCIPlpiFree(), SCIPsetDebugMsg, SCIPsetIsInfinity(), and TRUE.
Referenced by SCIPcomputeLPRelIntPoint().
gets array with columns of the LP
| lp | current LP data |
Definition at line 16734 of file lp.c.
References SCIP_Lp::cols.
Referenced by branchcandCalcLPCands(), forkFree(), SCIPcomputeLPRelIntPoint(), SCIPgetLPCols(), SCIPgetLPColsData(), and SCIPsolLinkLPSol().
| int SCIPlpGetNCols | ( | SCIP_LP * | lp | ) |
gets current number of columns in LP
| lp | current LP data |
Definition at line 16744 of file lp.c.
References SCIP_Lp::ncols.
Referenced by branchcandCalcLPCands(), focusnodeCleanupVars(), focusnodeToFork(), forkFree(), getDualProof(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPcomputeLPRelIntPoint(), SCIPgetLPColsData(), SCIPgetNLPCols(), SCIPnodeFocus(), SCIPpricestoreAddProbVars(), SCIPpricestoreApplyVars(), SCIPprobAllColsInLP(), SCIPsolLinkLPSol(), SCIPtreeLoadLP(), and treeBacktrackProbing().
gets array with rows of the LP
| lp | current LP data |
Definition at line 16754 of file lp.c.
References SCIP_Lp::rows.
Referenced by forkFree(), getDualProof(), getFarkasProof(), runBoundHeuristic(), SCIPgetLPRows(), SCIPgetLPRowsData(), and storeCuts().
| int SCIPlpGetNRows | ( | SCIP_LP * | lp | ) |
gets current number of rows in LP
| lp | current LP data |
Definition at line 16764 of file lp.c.
References SCIP_Lp::nrows.
Referenced by focusnodeToFork(), forkFree(), getDualProof(), getFarkasProof(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPgetLPRowsData(), SCIPgetNLPRows(), SCIPnodeFocus(), SCIPtreeLoadLP(), storeCuts(), and treeBacktrackProbing().
gets array with newly added columns after the last mark
| lp | current LP data |
Definition at line 16774 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::firstnewcol, and SCIP_Lp::ncols.
Referenced by forkCreate(), and pseudoforkCreate().
| int SCIPlpGetNNewcols | ( | SCIP_LP * | lp | ) |
gets number of newly added columns after the last mark
| lp | current LP data |
Definition at line 16785 of file lp.c.
References SCIP_Lp::firstnewcol, and SCIP_Lp::ncols.
Referenced by focusnodeCleanupVars(), focusnodeToFork(), focusnodeToJunction(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
gets array with newly added rows after the last mark
| lp | current LP data |
Definition at line 16796 of file lp.c.
References SCIP_Lp::firstnewrow, SCIP_Lp::nrows, and SCIP_Lp::rows.
Referenced by forkCreate(), and pseudoforkCreate().
| int SCIPlpGetNNewrows | ( | SCIP_LP * | lp | ) |
gets number of newly added rows after the last mark
| lp | current LP data |
Definition at line 16807 of file lp.c.
References SCIP_Lp::firstnewrow, and SCIP_Lp::nrows.
Referenced by focusnodeToFork(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
gets Euclidean norm of objective function vector of column variables, only use this method if lp->objsqrnormunreliable == FALSE, so probably you have to call SCIPlpRecalculateObjSqrNorm before
| lp | LP data |
Definition at line 16849 of file lp.c.
References SCIP_Lp::objsqrnorm, and SCIP_Lp::objsqrnormunreliable.
Referenced by SCIPgetObjNorm().
gets the objective value of the root node LP; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16882 of file lp.c.
References SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by SCIPgetLPRootObjval().
gets part of the objective value of the root node LP that results from COLUMN variables only; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16894 of file lp.c.
References SCIP_Lp::rootlpobjval.
Referenced by SCIPgetLPRootColumnObjval().
gets part of the objective value of the root node LP that results from LOOSE variables only; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16906 of file lp.c.
References SCIP_Lp::rootlooseobjval.
Referenced by SCIPgetLPRootLooseObjval().
gets the LP solver interface
| lp | current LP data |
Definition at line 16916 of file lp.c.
References SCIP_Lp::lpi.
Referenced by conflictAnalyzeLP(), SCIPconflictAnalyzeLP(), SCIPgetLPI(), SCIPlpSolveAndEval(), SCIPprintLPSolutionQuality(), solveNodeLP(), undoBdchgsDualfarkas(), and undoBdchgsDualsol().
sets whether the current lp is a relaxation of the current problem and its optimal objective value is a local lower bound
sets whether the current LP is a relaxation of the current problem and its optimal objective value is a local lower bound
| lp | LP data |
| relax | is the current lp a relaxation? |
Definition at line 16926 of file lp.c.
References SCIP_Lp::isrelax.
Referenced by SCIPpriceLoop(), SCIPtreeEndProbing(), and solveProbingLP().
returns whether the current LP is a relaxation of the problem for which it has been solved and its solution value a valid local lower bound?
| lp | LP data |
Definition at line 16939 of file lp.c.
References SCIP_Lp::isrelax.
Referenced by priceAndCutLoop(), propAndSolve(), SCIPendDive(), SCIPisLPRelax(), SCIPprobStoreRootSol(), SCIPtreeEndProbing(), solveNodeInitialLP(), and updateEstimate().
returns whether the current LP is flushed and solved
| lp | current LP data |
Definition at line 16949 of file lp.c.
References SCIP_Lp::flushed, and SCIP_Lp::solved.
Referenced by priceAndCutLoop(), SCIPendDive(), SCIPlinkLPSol(), SCIPsolCreateLPSol(), and SCIPsolLinkCurrentSol().
return whether the current LP solution passed the primal feasibility check
| lp | current LP data |
Definition at line 16959 of file lp.c.
References SCIP_Lp::primalchecked, and SCIP_Lp::primalfeasible.
Referenced by SCIPisLPPrimalReliable().
return whether the current LP solution passed the dual feasibility check
| lp | current LP data |
Definition at line 16969 of file lp.c.
References SCIP_Lp::dualchecked, and SCIP_Lp::dualfeasible.
Referenced by analyzeStrongbranch(), SCIPisLPDualReliable(), and SCIPprobUpdateBestRootSol().
returns whether the current LP solution is a basic solution
| lp | current LP data |
Definition at line 16979 of file lp.c.
References SCIP_Lp::solisbasic.
Referenced by getImplVarRedcost(), SCIPgetLPBasisInd(), SCIPgetLPBInvACol(), SCIPgetLPBInvARow(), SCIPgetLPBInvCol(), SCIPgetLPBInvRow(), SCIPisLPSolBasic(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
returns whether the LP is in diving mode
| lp | current LP data |
Definition at line 16989 of file lp.c.
References SCIP_Lp::diving.
Referenced by computeLPBounds(), conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), SCIPaddRowDive(), SCIPchgCutoffboundDive(), SCIPchgRowLhs(), SCIPchgRowLhsDive(), SCIPchgRowRhs(), SCIPchgRowRhsDive(), SCIPchgVarLbDive(), SCIPchgVarObjDive(), SCIPchgVarUbDive(), SCIPendDive(), SCIPgetVarLbDive(), SCIPgetVarObjDive(), SCIPgetVarUbDive(), SCIPinDive(), SCIPprimalHeuristics(), SCIPsolLinkLPSol(), SCIPsolveDiveLP(), SCIPstartDive(), SCIPstartProbing(), SCIPstartStrongbranch(), SCIPtreeCutoff(), SCIPvarChgLbDive(), and SCIPvarChgUbDive().
returns whether the LP is in diving mode and the objective value of at least one column was changed
| lp | current LP data |
Definition at line 16999 of file lp.c.
References SCIP_Lp::divingobjchg.
Referenced by conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), conflictAnalyzeLP(), getFarkasProof(), runBoundHeuristic(), SCIPchgVarObjProbing(), SCIPlpSetCutoffbound(), SCIPsolLinkLPSol(), SCIPsolveDiveLP(), and SCIPtreeEndProbing().
| void SCIPlpMarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to have a changed objective function
| lp | current LP data |
Definition at line 17009 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, SCIP_Lp::probing, and TRUE.
Referenced by SCIPchgVarObjDive(), SCIPchgVarObjProbing(), and SCIPpropagateProbing().
| void SCIPlpUnmarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to not have a changed objective function anymore
| lp | current LP data |
Definition at line 17020 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, FALSE, and SCIP_Lp::probing.
Referenced by SCIPpropagateProbing(), and treeBacktrackProbing().
| lp | current LP data |
Definition at line 17031 of file lp.c.
References SCIP_Lp::diving, and SCIP_Lp::ndivechgsides.
Referenced by SCIPsolveDiveLP().