Proof using misi.
red. unfold client_cache_keys_correct in *. simpl in *. intros. subst.
find_higher_order_rewrite.
destruct_update; simpl in *; eauto.
erewrite handleClientRequest_clientCache; eauto.
erewrite handleClientRequest_preserves_lastApplied_entries; eauto.
Qed.

(* Specifications: *)
Lemma client_cache_keys_correct_timeout :
raft_net_invariant_timeout' client_cache_keys_correct.