Lemma update_elections_data_request_vote_votedFor : forall h h' cid t lli llt st st' m, handleRequestVote h (snd st) t h' lli llt = (st', m) -> votedFor st' = Some cid -> (votedFor (snd st) = Some cid /\ currentTerm st' = currentTerm (snd st)) \/ (cid = h' /\ currentTerm st' = t /\ votesWithLog (update_elections_data_requestVote h h' t h' lli llt st) = (currentTerm st', cid, (log st')) :: votesWithLog (fst st) /\ moreUpToDate llt lli (maxTerm (log st')) (maxIndex (log st')) = true).