correct                                                                                                                                                                                             
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                               Incorrect                                                                                
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                  log attempt                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                              attempt_count++                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                      no
                                                                                                                                                  attempt_count > 4                                                                                                                                                     
                                                                                                                                                                                                                               yes                                                                                      
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                 increase delay timer                                                                                                                                                                   
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                     wait for timer to expire                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                       log request                                                                                                                                      
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                                                                                                                                             disable service