Proof using tsi.
unfold raft_net_invariant_client_request. unfold logs_sorted. intuition.
- unfold logs_sorted_host in *. simpl in *. intros.
find_higher_order_rewrite. break_match; eauto.
subst.
eauto using handleClientRequest_logs_sorted.
- find_apply_lem_hyp handleClientRequest_packets. subst. simpl in *.
eauto using logs_sorted_nw_packets_unchanged.
- find_apply_lem_hyp handleClientRequest_packets. subst. simpl in *.
eauto using packets_gt_prevIndex_packets_unchanged.
- find_apply_lem_hyp handleClientRequest_packets. subst. simpl in *.
eauto using packets_ge_prevTerm_packets_unchanged.
Qed.

Theorem handleTimeout_log :
forall h st out st' ps,
handleTimeout h st = (out, st', ps) ->
log st' = log st.