Program: 159878
Project: 159878
Buggy source:
private void addTargets(Ability ability,String[] groups,Game game){
  for (int i=1; i < groups.length; i++) {
    String group=groups[i];
    String target;
    if (group.startsWith("String_Node_Str")) {
      target=group.substring(group.indexOf("String_Node_Str") + 13);
      for (      Player player : game.getPlayers().values()) {
        if (player.getName().equals(target)) {
          ability.getTargets().get(0).addTarget(player.getId(),ability,game);
          break;
        }
      }
    }
 else     if (group.startsWith("String_Node_Str")) {
      target=group.substring(group.indexOf("String_Node_Str") + 7);
      String[] targets=target.split("String_Node_Str");
      int index=0;
      for (      String t : targets) {
        if (t.startsWith("String_Node_Str")) {
          target=t.substring(t.indexOf("String_Node_Str") + 13);
          for (          Player player : game.getPlayers().values()) {
            if (player.getName().equals(target)) {
              ability.getTargets().get(index).addTarget(player.getId(),ability,game);
              index++;
              break;
            }
          }
        }
 else {
          if (ability.getTargets().size() == 0) {
            throw new AssertionError("String_Node_Str");
          }
          for (          UUID id : ability.getTargets().get(0).possibleTargets(ability.getSourceId(),ability.getControllerId(),game)) {
            MageObject object=game.getObject(id);
            if (object != null && object.getName().equals(t)) {
              if (index >= ability.getTargets().size()) {
                index--;
              }
              if (ability.getTargets().get(index).getNumberOfTargets() == 1) {
                ability.getTargets().get(index).clearChosen();
              }
              ability.getTargets().get(index).addTarget(id,ability,game);
              index++;
              break;
            }
          }
        }
      }
    }
  }
}

Fixed version (ground truth):
private void addTargets(Ability ability,String[] groups,Game game){
  for (int i=1; i < groups.length; i++) {
    String group=groups[i];
    String target;
    if (group.startsWith("String_Node_Str")) {
      target=group.substring(group.indexOf("String_Node_Str") + 13);
      for (      Player player : game.getPlayers().values()) {
        if (player.getName().equals(target)) {
          ability.getTargets().get(0).addTarget(player.getId(),ability,game);
          break;
        }
      }
    }
 else     if (group.startsWith("String_Node_Str")) {
      target=group.substring(group.indexOf("String_Node_Str") + 7);
      String[] targets=target.split("String_Node_Str");
      int index=0;
      for (      String t : targets) {
        if (t.startsWith("String_Node_Str")) {
          target=t.substring(t.indexOf("String_Node_Str") + 13);
          for (          Player player : game.getPlayers().values()) {
            if (player.getName().equals(target)) {
              ability.getTargets().get(index).addTarget(player.getId(),ability,game);
              index++;
              break;
            }
          }
        }
 else {
          if (ability.getTargets().size() == 0) {
            throw new AssertionError("String_Node_Str");
          }
          for (          UUID id : ability.getTargets().get(0).possibleTargets(ability.getSourceId(),ability.getControllerId(),game)) {
            MageObject object=game.getObject(id);
            if (object != null && object.getName().equals(t)) {
              if (index >= ability.getTargets().size()) {
                index--;
              }
              if (ability.getTargets().get(index).getNumberOfTargets() == 1) {
                ability.getTargets().get(index).clearChosen();
              }
              if (ability.getTargets().get(index) instanceof TargetCreaturePermanentAmount) {
                TargetCreaturePermanentAmount targetAmount=(TargetCreaturePermanentAmount)ability.getTargets().get(index);
                targetAmount.setAmount(ability,game);
                int amount=targetAmount.getAmountRemaining();
                targetAmount.addTarget(id,amount,ability,game);
              }
 else {
                ability.getTargets().get(index).addTarget(id,ability,game);
              }
              index++;
              break;
            }
          }
        }
      }
    }
  }
}