make bound changing after strong branching safer

coin-or · Feb 5, 2025 · b380c42 · b380c42
1 parent 2e5cbd8
commit b380c42
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Cbc/src/CbcNode.cpp b/Cbc/src/CbcNode.cpp
@@ -3291,7 +3291,7 @@ int CbcNode::chooseDynamicBranch(CbcModel *model, CbcNode *lastNode,
                 double changePer = objectiveChange / (down + 1.0e-7);
                 double distance = (cutoff - objectiveValue_) / changePer;
                 distance += 1.0e-3;
-                if (distance < 5.0) {
+                if (distance < 5.0 && down > 1.0e-3) {
                   double newLower = ceil(value - distance);
                   if (newLower > saveLower[iColumn]) {
                     //printf("Could increase lower bound on %d from %g to %g\n",
@@ -3505,7 +3505,7 @@ int CbcNode::chooseDynamicBranch(CbcModel *model, CbcNode *lastNode,
                 double changePer = objectiveChange / (up + 1.0e-7);
                 double distance = (cutoff - objectiveValue_) / changePer;
                 distance += 1.0e-3;
-                if (distance < 5.0) {
+                if (distance < 5.0 && up > 1.0e-3) {
                   double newUpper = floor(value + distance);
                   if (newUpper < saveUpper[iColumn]) {
                     //printf("Could decrease upper bound on %d from %g to %g\n",