Lemma handleRequestVoteReply_matchIndex : forall n st src t v, type (handleRequestVoteReply n st src t v) = Leader -> type st = Leader /\ matchIndex (handleRequestVoteReply n st src t v) = matchIndex st \/ matchIndex (handleRequestVoteReply n st src t v) = (assoc_set name_eq_dec nil n (maxIndex (log st))).