Proof using aercfli.
intros. unfold appendEntriesRequest_exists_leaderLog.
apply append_entries_came_from_leaders_invariant; auto.
Qed.

(* Specifications: *)
Lemma appendEntriesRequest_leaderLog_not_in_invariant :
forall net,
refined_raft_intermediate_reachable net ->
appendEntriesRequest_leaderLog_not_in net.