When the CA Identity Manager Application Server initially starts after the upgrade, you should see the following output in the application server logs:

18:41:20,132 WARN  [default] ################################################
18:41:20,132 WARN  [default] # CA Identity Manager 12.5.x.x.x
18:41:20,132 WARN  [default] ################################################
18:41:20,132 WARN  [default] ---- CA IAM FW Startup Sequence Initiated. ----
18:41:20,132 WARN  [default] * Startup Step 1 : Attempting to start ServiceLocator.
18:41:20,632 WARN  [default] * Startup Step 2 : Attempting to start PolicyServerService
18:41:20,835 WARN  [default] * Startup Step 3 : Attempting to start ServerCommandService
18:41:21,148 WARN  [default] * Startup Step 4 : Attempting to start EnvironmentService
18:41:21,163 WARN  [default] * Startup Step 5 : Attempting to start CacheManagerService
18:41:21,179 WARN  [default] * Startup Step 6 : Attempting to load global plugins.
18:41:30,694 WARN  [default] * Startup Step 7 : Attempting to start AdaptersConfigService
18:41:30,710 WARN  [default] * Startup Step 8 : Attempting to start EmailProviderService
18:41:30,741 WARN  [default] * Startup Step 9 : Attempting to start AuditProviderService
18:41:30,788 WARN  [default] * Startup Step 10 : Attempting to start RuntimeStatusDetailService
.
.
.
18:41:31,038 WARN  [default] * Startup Step 23 : Attempting to start GlobalInitializer plug-ins
18:41:31,038 WARN  [default] * Startup Step 24 : Attempting to start environments
18:42:15,960 WARN  [EnvironmentService] * Starting environment: XXXX
18:42:18,116 WARN  [default] * Startup Step 25 : Attempting to start SchedulerService
18:42:18,163 WARN  [default] * Startup Step 26 : Attempting to recover events and runtime status details
18:42:18,257 WARN  [default] ---- CA IAM FW Startup Sequence Complete. ----