Proof using.
unfold update_elections_data_requestVoteReply.
intros.
repeat break_match; repeat find_inversion; intuition.
simpl in *. intuition.
find_inversion. intuition.
Qed.

Lemma update_elections_data_requestVoteReply_old :
forall h src t1 v st t2 ll,
In (t2, ll) (leaderLogs (fst st)) ->
In (t2, ll) (leaderLogs (update_elections_data_requestVoteReply h src t1 v st)).