Program: 136130
Project: 136130
Buggy source:
public final boolean levelCheck(int itr){
  if (this.levelChecked >= itr)   return this.levelCorrect;
  levelChecked=itr;
  this.levelCorrect=true;
  for (int i=0; i < this.opDefs.length; i++) {
    if ((this.opDefs[i].getKind() != ModuleInstanceKind) && !this.opDefs[i].levelCheck(itr)) {
      this.levelCorrect=false;
    }
  }
  if (!this.body.levelCheck(itr)) {
    this.levelCorrect=false;
  }
  for (int i=0; i < this.insts.length; i++) {
    if (!this.insts[i].levelCheck(itr)) {
      this.levelCorrect=false;
    }
  }
  this.level=this.body.getLevel();
  this.levelParams=this.body.getLevelParams();
  this.allParams=this.body.getAllParams();
  this.levelConstraints.putAll(this.body.getLevelConstraints());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      this.levelConstraints.putAll(opDefs[i].getLevelConstraints());
    }
    ;
  }
  this.argLevelConstraints.putAll(this.body.getArgLevelConstraints());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      this.argLevelConstraints.putAll(opDefs[i].getArgLevelConstraints());
    }
    ;
  }
  this.argLevelParams.addAll(this.body.getArgLevelParams());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      FormalParamNode[] params=new FormalParamNode[0];
      if (this.opDefs[i].getKind() != ThmOrAssumpDefKind) {
        params=((OpDefNode)this.opDefs[i]).getParams();
      }
      ;
      Iterator iter=this.opDefs[i].getArgLevelParams().iterator();
      while (iter.hasNext()) {
        ArgLevelParam alp=(ArgLevelParam)iter.next();
        if (!alp.occur(params)) {
          this.argLevelParams.add(alp);
        }
      }
    }
  }
  for (int i=0; i < this.insts.length; i++) {
    this.argLevelParams.addAll(this.insts[i].getArgLevelParams());
  }
  return this.levelCorrect;
}

Fixed version (ground truth):
public final boolean levelCheck(int itr){
  if (this.levelChecked >= itr)   return this.levelCorrect;
  levelChecked=itr;
  this.levelCorrect=true;
  for (int i=0; i < this.opDefs.length; i++) {
    if ((this.opDefs[i].getKind() != ModuleInstanceKind) && !this.opDefs[i].levelCheck(itr)) {
      this.levelCorrect=false;
    }
  }
  if (!this.body.levelCheck(itr)) {
    this.levelCorrect=false;
  }
  for (int i=0; i < this.insts.length; i++) {
    if (!this.insts[i].levelCheck(itr)) {
      this.levelCorrect=false;
    }
  }
  this.level=this.body.getLevel();
  this.levelParams=(HashSet)this.body.getLevelParams().clone();
  this.allParams=(HashSet)this.body.getAllParams().clone();
  this.levelConstraints.putAll(this.body.getLevelConstraints());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      this.levelConstraints.putAll(opDefs[i].getLevelConstraints());
    }
    ;
  }
  this.argLevelConstraints.putAll(this.body.getArgLevelConstraints());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      this.argLevelConstraints.putAll(opDefs[i].getArgLevelConstraints());
    }
    ;
  }
  this.argLevelParams.addAll(this.body.getArgLevelParams());
  for (int i=0; i < this.opDefs.length; i++) {
    if (this.opDefs[i].getKind() != ModuleInstanceKind) {
      FormalParamNode[] params=new FormalParamNode[0];
      if (this.opDefs[i].getKind() != ThmOrAssumpDefKind) {
        params=((OpDefNode)this.opDefs[i]).getParams();
      }
      ;
      Iterator iter=this.opDefs[i].getArgLevelParams().iterator();
      while (iter.hasNext()) {
        ArgLevelParam alp=(ArgLevelParam)iter.next();
        if (!alp.occur(params)) {
          this.argLevelParams.add(alp);
        }
      }
    }
  }
  for (int i=0; i < this.insts.length; i++) {
    this.argLevelParams.addAll(this.insts[i].getArgLevelParams());
  }
  return this.levelCorrect;
}