3 Rest -> "ACM Runtime": ACM operation triggered by the user
5 "ACM Runtime" -> "ACM Database": Read Automation Composition information
7 "ACM Runtime" -> Participant : [ASYNC] Send the state change event to the participant
8 "ACM Runtime" -> "ACM Database": Mark the AC element into transitioning state
9 deactivate "ACM Runtime"
10 Participant -> Participant: Goes OFF_LINE due to an unexpected error
11 deactivate Participant
13 activate "ACM Runtime"
14 "ACM Runtime" -> "ACM Database": Mark OFF_LINE reached for the participant status report
15 "ACM Runtime" -> "ACM Database": Mark TIMEOUT reached for the AC instance
16 deactivate "ACM Runtime"