#vulnerable code 
                             public VehicleRoutingAlgorithm createAlgorithm(VehicleRoutingProblem vrp){
		AlgorithmConfig algorithmConfig = new AlgorithmConfig();
		URL resource = Resource.getAsURL("schrimpf.xml");
		new AlgorithmConfigXmlReader(algorithmConfig).read(resource.getPath());
		return VehicleRoutingAlgorithms.createAlgorithm(vrp, algorithmConfig);
	} 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             public VehicleRoutingAlgorithm createAlgorithm(VehicleRoutingProblem vrp){
		AlgorithmConfig algorithmConfig = new AlgorithmConfig();
		URL resource = Resource.getAsURL("schrimpf.xml");
		new AlgorithmConfigXmlReader(algorithmConfig).read(resource);
		return VehicleRoutingAlgorithms.createAlgorithm(vrp, algorithmConfig);
	}