Proof using.
intros.
unfold update_elections_data_requestVote in *.
repeat break_match; simpl in *; auto.
Qed.

Lemma handleRequestVote_votesReceived :
forall h st t h' lli llt st' m,
handleRequestVote h st t h' lli llt = (st', m) ->
votesReceived st' = votesReceived st.