Proof using.
intros. unfold advanceCurrentTerm in *.
break_if; simpl in *; do_bool; omega.
Qed.

Lemma handleRequestVote_currentTerm_monotonic :
forall pDst t cid lli llt d d' m,
handleRequestVote pDst d t cid lli llt = (d', m) ->
currentTerm d <= currentTerm d'.