Lemma leaderLogs_update_elections_data_RVR : forall h src t1 v st t2 ll st', handleRequestVoteReply h (snd st) src t1 v = st' -> In (t2, ll) (leaderLogs (update_elections_data_requestVoteReply h src t1 v st)) -> In (t2, ll) (leaderLogs (fst st)) \/ (type st' = Leader /\ type (snd st) = Candidate /\ t2 = currentTerm st' /\ ll = log st').