Program: 39792
Project: 39792
Buggy source:
public Graph transform(Graph g){
  Random rand=new Random();
  AttackableEmbeddingNode[] nodes=this.generateNodes(g,rand);
  AttackableEmbeddingNode[] selectionSet=this.generateSelectionSet(nodes,rand);
  g.setNodes(nodes);
  GraphProperty[] prop=g.getProperties("String_Node_Str");
  DIdentifierSpace idSpace;
  int k=-1;
  for (int i=0; i < prop.length; i++) {
    if (prop[i] instanceof RingIdentifierSpaceSimple) {
      k=i;
    }
  }
  if (k == -1) {
    Transformation idTrans=new RandomRingIDSpaceSimple();
    g=idTrans.transform(g);
    prop=g.getProperties("String_Node_Str");
    k=prop.length - 1;
  }
  idSpace=(DIdentifierSpace)prop[k];
  this.setIdspace(idSpace);
  RingIdentifier[] ids=this.getIds();
  for (int i=0; i < ids.length; i++) {
    ((IQDNode)nodes[i]).setID(ids[i].getPosition());
  }
  for (int i=0; i < ids.length; i++) {
    ((IQDNode)nodes[i]).updateNeighbors(rand);
  }
  for (int i=0; i < this.iterations * selectionSet.length; i++) {
    int index=rand.nextInt(selectionSet.length);
    if (selectionSet[index].getOutDegree() > 0) {
      if (this.adjustOneDegree && selectionSet[index].getDegree() == 2) {
        IQDNode node=(IQDNode)selectionSet[index];
        double neighPos=((IQDNode)nodes[node.getOutgoingEdges()[0]]).getID();
        if (Math.abs(this.computeDistance(neighPos,node.getID())) > this.epsilon) {
          double id=neighPos - rand.nextDouble() * this.epsilon;
          if (id < 0)           id++;
          node.setID(id);
        }
      }
 else {
        selectionSet[index].updateNeighbors(rand);
        selectionSet[index].turn(rand);
      }
    }
  }
  for (int i=0; i < ids.length; i++) {
    ids[i].setPosition(((IQDNode)nodes[i]).getID());
  }
  Partition<Double>[] parts=new RingPartitionSimple[g.getNodes().length];
  for (int i=0; i < parts.length; i++) {
    parts[i]=new RingPartitionSimple(ids[i]);
  }
  idSpace.setPartitions(parts);
  return g;
}

Fixed version (ground truth):
public Graph transform(Graph g){
  GraphProperty[] prop=g.getProperties("String_Node_Str");
  DIdentifierSpace idSpace;
  int k=-1;
  for (int i=0; i < prop.length; i++) {
    if (prop[i] instanceof RingIdentifierSpaceSimple) {
      k=i;
    }
  }
  if (k == -1) {
    Transformation idTrans=new RandomRingIDSpaceSimple();
    g=idTrans.transform(g);
    prop=g.getProperties("String_Node_Str");
    k=prop.length - 1;
  }
  idSpace=(DIdentifierSpace)prop[k];
  this.setIdspace(idSpace);
  Random rand=new Random();
  AttackableEmbeddingNode[] nodes=this.generateNodes(g,rand);
  AttackableEmbeddingNode[] selectionSet=this.generateSelectionSet(nodes,rand);
  g.setNodes(nodes);
  RingIdentifier[] ids=this.getIds();
  for (int i=0; i < ids.length; i++) {
    ((IQDNode)nodes[i]).setID(ids[i].getPosition());
  }
  for (int i=0; i < ids.length; i++) {
    ((IQDNode)nodes[i]).updateNeighbors(rand);
  }
  for (int i=0; i < this.iterations * selectionSet.length; i++) {
    int index=rand.nextInt(selectionSet.length);
    if (selectionSet[index].getOutDegree() > 0) {
      if (this.adjustOneDegree && selectionSet[index].getDegree() == 2) {
        IQDNode node=(IQDNode)selectionSet[index];
        double neighPos=((IQDNode)nodes[node.getOutgoingEdges()[0]]).getID();
        if (Math.abs(this.computeDistance(neighPos,node.getID())) > this.epsilon) {
          double id=neighPos - rand.nextDouble() * this.epsilon;
          if (id < 0)           id++;
          node.setID(id);
        }
      }
 else {
        selectionSet[index].updateNeighbors(rand);
        selectionSet[index].turn(rand);
      }
    }
  }
  for (int i=0; i < ids.length; i++) {
    ids[i].setPosition(((IQDNode)nodes[i]).getID());
  }
  Partition<Double>[] parts=new RingPartitionSimple[g.getNodes().length];
  for (int i=0; i < parts.length; i++) {
    parts[i]=new RingPartitionSimple(ids[i]);
  }
  idSpace.setPartitions(parts);
  return g;
}