artificially inserted instructions are now stored in a NodeHashSet to improve equality checks.

sdg-core/src/main/java/es/upv/mist/slicing/graphs/jsysdg/JSysCFG.java

@@ -20,6 +20,7 @@ import es.upv.mist.slicing.nodes.GraphNode;
 import es.upv.mist.slicing.nodes.VariableAction;
 import es.upv.mist.slicing.nodes.io.MethodExitNode;
 import es.upv.mist.slicing.utils.ASTUtils;
+import es.upv.mist.slicing.utils.NodeHashSet;
 import es.upv.mist.slicing.utils.NodeNotFoundException;
 
 import java.util.HashSet;
@@ -155,7 +156,7 @@ public class JSysCFG extends ESCFG {
         protected ClassGraph classGraph;
         /** List of implicit instructions inserted explicitly in this CFG.
          *  They should be included in the graph as ImplicitNodes. */
-        protected List<Node> methodInsertedInstructions = new LinkedList<>();
+        protected NodeHashSet<Node> methodInsertedInstructions = new NodeHashSet<>();
         /** Whether we are building a CFG for an implicit method or not. */
         protected boolean implicitDeclaration = false;
 

sdg-core/src/test/res/regression/programs/sdg/ConstructorWithReturn.java.sdg.sliced

 class Test {
+
     int a;
 
     Test(int a, boolean b, int c) {
@@ -14,4 +15,4 @@ class Test {
         int a = t.a;
         System.out.println(a);
     }
-}
\ No newline at end of file
+}