make bound changing after strong branching safer

coin-or · Feb 5, 2025 · 03117ee · 03117ee
1 parent 9d9fb28
commit 03117ee
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/CbcNode.cpp b/src/CbcNode.cpp
@@ -3647,7 +3647,7 @@ 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) {
 #if TRY_NODE_DOUBLE>0
 		  if (doubleTry==2&&distance<2.0) {
 		    // look carefully
@@ -3943,7 +3943,7 @@ 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) {
 #if TRY_NODE_DOUBLE>0
 		  if (doubleTry==2&&distance<2.0) {
 		    // look carefully