Proof using.
intros. unfold handleRequestVote, advanceCurrentTerm in *.
repeat (break_match; try find_inversion; try discriminate);
simpl in *; subst; intuition.
Qed.

Lemma update_elections_data_requestVote_cronies :
forall h h' t h'' lli llt st,
cronies (update_elections_data_requestVote h h' t h'' lli llt st) =
cronies (fst st).