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Fix 2175 #2177

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Feb 12, 2025
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Fix 2175 #2177

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16 changes: 12 additions & 4 deletions src/mip/HighsTransformedLp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -220,10 +220,18 @@ bool HighsTransformedLp::transform(std::vector<double>& vals,
if (ub - lb <= 1.5 || boundDist[col] != 0.0 || simpleLbDist[col] == 0 ||
simpleUbDist[col] == 0) {
// since we skip the handling of variable bound constraints for all
// binary and some general-integer variables, the bound type used should
// be a simple lower or upper bound
assert(oldBoundType == BoundType::kSimpleLb ||
oldBoundType == BoundType::kSimpleUb);
// binary and some general-integer variables here, the bound type used
// should be a simple lower or upper bound
if (simpleLbDist[col] < simpleUbDist[col] - mip.mipdata_->feastol) {
boundTypes[col] = BoundType::kSimpleLb;
} else if (simpleUbDist[col] <
simpleLbDist[col] - mip.mipdata_->feastol) {
boundTypes[col] = BoundType::kSimpleUb;
} else if (vals[i] > 0) {
boundTypes[col] = BoundType::kSimpleLb;
} else {
boundTypes[col] = BoundType::kSimpleUb;
}
i++;
continue;
}
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