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

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;

        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;

class Test {

    int a;

    Test(int a, boolean b, int c) {