output: #fixed code
                                  private boolean testExecuteWorkflow(TlsConfig config) {
  
          // TODO ugly
          ConfigHandler configHandler = new ConfigHandler();
          TransportHandler transportHandler = configHandler.initializeTransportHandler(config);
  
          TlsContext tlsContext = configHandler.initializeTlsContext(config);
          config.setWorkflowTraceType(WorkflowTraceType.FULL);
          WorkflowExecutor workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          boolean result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed vanilla execution");
              return result;
          }
          tlsContext.getWorkflowTrace().reset();
          WorkflowTrace trace = tlsContext.getWorkflowTrace();
          tlsContext = configHandler.initializeTlsContext(config);
          tlsContext.setWorkflowTrace(trace);
          transportHandler = configHandler.initializeTransportHandler(config);
          workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed reset execution");
              return result;
          }
          tlsContext.getWorkflowTrace().reset();
          tlsContext.getWorkflowTrace().makeGeneric();
          trace = tlsContext.getWorkflowTrace();
          tlsContext = configHandler.initializeTlsContext(config);
          tlsContext.setWorkflowTrace(trace);
          transportHandler = configHandler.initializeTransportHandler(config);
          workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed reset&generic execution");
          }
          return result;
      }
input: #vulnerable code 
                                  private boolean testExecuteWorkflow(TlsConfig config) {
  
          // TODO ugly
          ConfigHandler configHandler = new ConfigHandler();
          TransportHandler transportHandler = configHandler.initializeTransportHandler(config);
  
          TlsContext tlsContext = configHandler.initializeTlsContext(config);
          WorkflowExecutor workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          boolean result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed vanilla execution");
              return result;
          }
          tlsContext.getWorkflowTrace().reset();
          WorkflowTrace trace = tlsContext.getWorkflowTrace();
          tlsContext = configHandler.initializeTlsContext(config);
          tlsContext.setWorkflowTrace(trace);
          transportHandler = configHandler.initializeTransportHandler(config);
          workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed reset execution");
              return result;
          }
          tlsContext.getWorkflowTrace().reset();
          tlsContext.getWorkflowTrace().makeGeneric();
          trace = tlsContext.getWorkflowTrace();
          tlsContext = configHandler.initializeTlsContext(config);
          tlsContext.setWorkflowTrace(trace);
          transportHandler = configHandler.initializeTransportHandler(config);
          workflowExecutor = configHandler.initializeWorkflowExecutor(transportHandler, tlsContext);
          try {
              workflowExecutor.executeWorkflow();
          } catch (Exception E) {
              E.printStackTrace();
          }
          transportHandler.closeConnection();
          result = isWorkflowTraceReasonable(tlsContext.getWorkflowTrace());
          if (!result) {
              LOGGER.log(Level.INFO, "Failed reset&generic execution");
          }
          return result;
      } 
                              #location 10 
                              #vulnerability type NULL_DEREFERENCE