Program: 72696
Project: 72696
Buggy source:
/** 
 * Initialize this actor to indicate that no input has yet been provided.
 */
public void initialize() throws IllegalActionException {
  super.initialize();
  _getInputPorts();
  _getOutputPorts();
  if (dx.size() != q.size()) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ q.size();
    throw new IllegalActionException(this,em);
  }
  int dqSize=((ArrayToken)quantum.getToken()).length();
  int xIniSize=((ArrayToken)initialState.getToken()).length();
  if (dx.size() != dqSize) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ dqSize;
    throw new IllegalActionException(this,em);
  }
  if (dx.size() != xIniSize) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ xIniSize;
    throw new IllegalActionException(this,em);
  }
  dq=_getDoubleArray(quantum,dqSize);
  xIni=_getDoubleArray(initialState,xIniSize);
  t_min=null;
  previousStateUpdateTime=null;
  u=new Token[dx.size()];
  x=new double[dx.size()];
  slope=new double[dx.size()];
  previousSlope=new double[dx.size()];
  nextOutputValue=new double[dx.size()];
  previousOutputValue=new double[dx.size()];
  previousInput=new Token[dx.size()];
  inputReceived=new boolean[dx.size()];
  _firstFiring=new boolean[dx.size()];
  nextOutputTime=new Time[dx.size()];
  index_min=new ArrayList<Integer>();
  for (int i=0; i < dx.size(); i++) {
    nextOutputTime[i]=null;
    x[i]=xIni[i];
    nextOutputValue[i]=_quantize(x[i],dq[i]);
    previousOutputValue=nextOutputValue;
    previousInput[i]=null;
    inputReceived[i]=false;
    _firstFiring[i]=true;
  }
  getDirector().fireAtCurrentTime(this);
}

Fixed version (ground truth):
/** 
 * Initialize this actor to indicate that no input has yet been provided.
 */
public void initialize() throws IllegalActionException {
  super.initialize();
  _getInputPorts();
  _getOutputPorts();
  if (dx.size() != q.size()) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ q.size();
    throw new IllegalActionException(this,em);
  }
  int dqSize=((ArrayToken)quantum.getToken()).length();
  int xIniSize=((ArrayToken)initialState.getToken()).length();
  if (dx.size() != dqSize) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ dqSize;
    throw new IllegalActionException(this,em);
  }
  if (dx.size() != xIniSize) {
    final String em="String_Node_Str" + this.getFullName() + LS+ "String_Node_Str"+ dx.size()+ LS+ "String_Node_Str"+ xIniSize;
    throw new IllegalActionException(this,em);
  }
  dq=_getDoubleArray(quantum,dqSize);
  xIni=_getDoubleArray(initialState,xIniSize);
  t_min=null;
  previousStateUpdateTime=null;
  u=new Token[dx.size()];
  x=new double[dx.size()];
  slope=new double[dx.size()];
  previousSlope=new double[dx.size()];
  nextOutputValue=new double[dx.size()];
  previousOutputValue=new double[dx.size()];
  previousInput=new Token[dx.size()];
  inputReceived=new boolean[dx.size()];
  _firstFiring=new boolean[dx.size()];
  nextOutputTime=new Time[dx.size()];
  index_min=new ArrayList<Integer>();
  for (int i=0; i < dx.size(); i++) {
    nextOutputTime[i]=null;
    x[i]=xIni[i];
    nextOutputValue[i]=_quantize(x[i],dq[i]);
    previousOutputValue[i]=nextOutputValue[i];
    previousInput[i]=null;
    inputReceived[i]=false;
    _firstFiring[i]=true;
  }
  getDirector().fireAtCurrentTime(this);
}