Greedy OPB solver

org.sat4j.pb/src/main/java/org/sat4j/pb/SolverFactory.java

@@ -39,6 +39,7 @@ import org.sat4j.minisat.learning.MiniSATLearning;
 import org.sat4j.minisat.learning.NoLearningButHeuristics;
 import org.sat4j.minisat.orders.PhaseInLastLearnedClauseSelectionStrategy;
 import org.sat4j.minisat.orders.RSATPhaseSelectionStrategy;
+import org.sat4j.minisat.orders.RandomWalkDecorator;
 import org.sat4j.minisat.orders.UserFixedPhaseSelectionStrategy;
 import org.sat4j.minisat.orders.VarOrderHeap;
 import org.sat4j.minisat.restarts.ArminRestarts;
@@ -1207,6 +1208,13 @@ public final class SolverFactory extends ASolverFactory<IPBSolver> {
         return solver;
     }
 
+    public static IPBSolver newCuttingPlanesGreedy() {
+        PBSolverCP solver = newCuttingPlanes();
+        solver.setOrder(
+                new RandomWalkDecorator((VarOrderHeap) solver.getOrder(), 1.0));
+        return solver;
+    }
+
     public static IPBSolver newPartialRoundingSatPOS2020() {
         PBSolverCP solver = (PBSolverCP) newPartialRoundingSat();