#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;
    }
#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