| 41 | } |
| 42 | |
| 43 | HighsInt HighsSeparation::separationRound(HighsDomain& propdomain, |
| 44 | HighsLpRelaxation::Status& status) { |
| 45 | const HighsSolution& sol = lp->getLpSolver().getSolution(); |
| 46 | |
| 47 | HighsMipSolverData& mipdata = *lp->getMipSolver().mipdata_; |
| 48 | |
| 49 | auto propagateAndResolve = [&]() { |
| 50 | if (propdomain.infeasible() || mipworker_.getGlobalDomain().infeasible()) { |
| 51 | status = HighsLpRelaxation::Status::kInfeasible; |
| 52 | propdomain.clearChangedCols(); |
| 53 | return -1; |
| 54 | } |
| 55 | |
| 56 | propdomain.propagate(); |
| 57 | if (propdomain.infeasible()) { |
| 58 | status = HighsLpRelaxation::Status::kInfeasible; |
| 59 | propdomain.clearChangedCols(); |
| 60 | return -1; |
| 61 | } |
| 62 | |
| 63 | // only modify cliquetable for master worker. |
| 64 | if (&propdomain == &mipdata.getDomain()) |
| 65 | mipdata.cliquetable.cleanupFixed(mipdata.getDomain()); |
| 66 | |
| 67 | if (mipworker_.getGlobalDomain().infeasible()) { |
| 68 | status = HighsLpRelaxation::Status::kInfeasible; |
| 69 | propdomain.clearChangedCols(); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | int numBoundChgs = (int)propdomain.getChangedCols().size(); |
| 74 | |
| 75 | while (!propdomain.getChangedCols().empty()) { |
| 76 | lp->setObjectiveLimit(mipworker_.upper_limit); |
| 77 | status = lp->resolveLp(&propdomain); |
| 78 | if (!lp->scaledOptimal(status)) return -1; |
| 79 | |
| 80 | if (&propdomain == &mipdata.getDomain() && |
| 81 | lp->unscaledDualFeasible(status)) { |
| 82 | mipdata.redcostfixing.addRootRedcost( |
| 83 | mipdata.mipsolver, lp->getSolution().col_dual, lp->getObjective()); |
| 84 | if (mipworker_.upper_limit != kHighsInf) |
| 85 | mipdata.redcostfixing.propagateRootRedcost(mipdata.mipsolver); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return numBoundChgs; |
| 90 | }; |
| 91 | |
| 92 | if (!mipdata.parallelLockActive()) |
| 93 | lp->getMipSolver().profiling_->start(implBoundClock); |
| 94 | mipdata.implications.separateImpliedBounds( |
| 95 | *lp, lp->getSolution().col_value, mipworker_.getCutPool(), |
| 96 | mipdata.feastol, mipworker_.getGlobalDomain(), |
| 97 | mipdata.parallelLockActive()); |
| 98 | if (!mipdata.parallelLockActive()) |
| 99 | lp->getMipSolver().profiling_->stop(implBoundClock); |
| 100 |
no test coverage detected