#vulnerable code 
                             @Override
	public void begin(VehicleRoute route) {
		currentLoad = (int) stateManager.getRouteState(route, StateIdFactory.LOAD_AT_DEPOT).toDouble();
		this.route = route;
	} 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Override
	public void begin(VehicleRoute route) {
		currentLoad = (int) stateManager.getRouteState(route, StateIdFactory.LOAD_AT_BEGINNING).toDouble();
		this.route = route;
	}