Program: 171898
Project: 171898
Buggy source:
@Override public ReactionToIncomingMessage processIncomingMessage(Object message){
  if (isIncomingMessageValid(message,MeteringReceiptResType.class)) {
    V2GMessage v2gMessageRes=(V2GMessage)message;
    MeteringReceiptResType meteringReceiptRes=(MeteringReceiptResType)v2gMessageRes.getBody().getBodyElement().getValue();
    EVSENotificationType evseNotification=null;
    if (getCommSessionContext().getRequestedEnergyTransferMode().toString().startsWith("String_Node_Str")) {
      setAcCharging(true);
      evseNotification=((ACEVSEStatusType)meteringReceiptRes.getEVSEStatus().getValue()).getEVSENotification();
    }
 else     if (getCommSessionContext().getRequestedEnergyTransferMode().toString().startsWith("String_Node_Str")) {
      setAcCharging(false);
      evseNotification=((DCEVSEStatusType)meteringReceiptRes.getEVSEStatus().getValue()).getEVSENotification();
    }
 else {
      return new TerminateSession("String_Node_Str" + getCommSessionContext().getRequestedEnergyTransferMode().toString() + "String_Node_Str");
    }
switch (evseNotification) {
case STOP_CHARGING:
      getCommSessionContext().setStopChargingRequested(true);
    return getSendMessage(getPowerDeliveryReq(ChargeProgressType.STOP),V2GMessages.POWER_DELIVERY_RES,"String_Node_Str");
case RE_NEGOTIATION:
  getCommSessionContext().setRenegotiationRequested(true);
return getSendMessage(getPowerDeliveryReq(ChargeProgressType.RENEGOTIATE),V2GMessages.POWER_DELIVERY_RES,"String_Node_Str");
default :
if (isAcCharging()) {
ChargingStatusReqType chargingStatusReq=new ChargingStatusReqType();
return getSendMessage(chargingStatusReq,V2GMessages.CHARGING_STATUS_RES);
}
 else {
return getSendMessage(getCurrentDemandReq(),V2GMessages.CURRENT_DEMAND_RES);
}
}
}
 else {
return new TerminateSession("String_Node_Str");
}
}

Fixed version (ground truth):
@Override public ReactionToIncomingMessage processIncomingMessage(Object message){
  if (isIncomingMessageValid(message,MeteringReceiptResType.class)) {
    V2GMessage v2gMessageRes=(V2GMessage)message;
    MeteringReceiptResType meteringReceiptRes=(MeteringReceiptResType)v2gMessageRes.getBody().getBodyElement().getValue();
    EVSENotificationType evseNotification=null;
    if (getCommSessionContext().getRequestedEnergyTransferMode().toString().startsWith("String_Node_Str")) {
      setAcCharging(true);
      evseNotification=((ACEVSEStatusType)meteringReceiptRes.getEVSEStatus().getValue()).getEVSENotification();
    }
 else     if (getCommSessionContext().getRequestedEnergyTransferMode().toString().startsWith("String_Node_Str")) {
      setAcCharging(false);
      evseNotification=((DCEVSEStatusType)meteringReceiptRes.getEVSEStatus().getValue()).getEVSENotification();
    }
 else {
      return new TerminateSession("String_Node_Str" + getCommSessionContext().getRequestedEnergyTransferMode().toString() + "String_Node_Str");
    }
switch (evseNotification) {
case STOP_CHARGING:
      getCommSessionContext().setStopChargingRequested(true);
    return getSendMessage(getPowerDeliveryReq(ChargeProgressType.STOP),V2GMessages.POWER_DELIVERY_RES,"String_Node_Str");
case RE_NEGOTIATION:
  getCommSessionContext().setRenegotiationRequested(true);
return getSendMessage(getPowerDeliveryReq(ChargeProgressType.RENEGOTIATE),V2GMessages.POWER_DELIVERY_RES,"String_Node_Str");
default :
if (isAcCharging() && getCommSessionContext().getEvController().isChargingLoopActive()) {
ChargingStatusReqType chargingStatusReq=new ChargingStatusReqType();
return getSendMessage(chargingStatusReq,V2GMessages.CHARGING_STATUS_RES);
}
 else if (getCommSessionContext().getEvController().isChargingLoopActive()) {
return getSendMessage(getCurrentDemandReq(),V2GMessages.CURRENT_DEMAND_RES);
}
 else {
getCommSessionContext().setStopChargingRequested(true);
return getSendMessage(getPowerDeliveryReq(ChargeProgressType.STOP),V2GMessages.POWER_DELIVERY_RES,"String_Node_Str");
}
}
}
 else {
return new TerminateSession("String_Node_Str");
}
}