theorem backlog_grows_when_arrivals_exceed_service
theorem backlog_grows_when_arrivals_exceed_service: ∀ (backlog arrivals service : Int), service < arrivals → backlog < backlogAfter backlog arrivals service
theorem backlog_grows_when_arrivals_exceed_service
theorem backlog_grows_when_arrivals_exceed_service: ∀ (backlog arrivals service : Int), service < arrivals → backlog < backlogAfter backlog arrivals service