Proof using.
unfold refined_raft_net_invariant_timeout, appendEntries_leader.
simpl.
intros.
find_apply_hyp_hyp.
intuition.
- repeat find_higher_order_rewrite.
update_destruct_simplify.
+ eapply appendEntries_leader_predicate_TTLM_preserved; eauto using handleTimeout_TTLM.
eauto.
+ eauto.
- do_in_map.
find_eapply_lem_hyp handleTimeout_packets; eauto.
subst. exfalso. eauto 10.
Qed.

Lemma handleAppendEntries_TTLM :
forall h st t n pli plt es ci st' ps,
handleAppendEntries h st t n pli plt es ci = (st', ps) ->
type_term_log_monotonic st st'.