Proof using.
intros.
invc H; repeat break_let; simpl in *;
repeat match goal with
| [ H : context [ inputs_m [(_, inr _)] ] |- _ ] =>
rewrite inputs_m_inr_singleton in H
| [ H : context [ inputs_m [(Primary, inl (Request _))] ] |- _ ] =>
rewrite inputs_m_primary_inl_request_singleton in H
| [ H : context [ inputs_m ((Primary, inl (Request _)) :: _) ] |- _ ] =>
rewrite inputs_m_primary_inl in H
| [ H : context [ inputs_m [(_, inl Read)] ] |- _ ] =>
rewrite inputs_m_inl_read_singleton in H
| [ H : context [ inputs_m ((_, inl Read) :: _) ] |- _ ] =>
rewrite inputs_m_inl_read in H
| [ H : context [ inputs_1 _ = [] ] |- _ ] =>
apply inputs_1_nil_is_nil in H; subst
| [ H : context [ inputs_m [_] ] |- _ ] =>
rewrite inputs_m_backup_singleton in H
| [ H : context [ inputs_m (_ :: _) ] |- _ ] =>
rewrite inputs_m_backup in H
| [ H : step_1_star _ _ [] |- _ ] =>
apply step_1_star_no_trace_no_step in H; [|solve [auto]]; subst
| [ H : step_1_star _ _ [_] |- _ ] =>
apply step_1_star_singleton_trace in H
| [ H : step_1 _ _ [_] |- _ ] =>
apply step_1_singleton_inversion in H
| [ |- context [ _ ++ [] ] ] =>
repeat rewrite app_nil_r
| [ H : context [ _ ++ [] ] |- _ ] =>
repeat rewrite app_nil_r in *
| [ H : context [ [] ++ _ ] |- _ ] =>
repeat rewrite app_nil_l in *
| [ H : context [PB_net _ _ _ _] |- _ ] => apply PB_net_defn in H
| [ H : context [PB_input_handler _ _ _] |- _ ] => apply PB_input_handler_defn in H
| [ H : context [inputs_1 _ = [_]] |- _ ] => apply inputs_1_singleton in H
| [ H : _ /\ _ |- _ ] => break_and
| [ H : exists _, _ |- _ ] => break_exists
| [ H : _ \/ _ |- _ ] => break_or_hyp
| _ => repeat break_let; repeat find_rewrite; repeat tuple_inversion; subst; auto
end; repeat rewrite snoc_assoc;
eauto using
correspond_preserved_primary_same_no_outputs,
update_nop,
update_diff,
outputs_m_inr_nil_singleton,
outputs_m_inl_read_singleton,
outputs_m_read_response_singleton.
- eapply correspond_preserved_primary_apply_entry; eauto using update_eq.
- eapply correspond_preserved_primary_apply_entry; eauto using update_eq.
- eapply correspond_preserved_primary_same_no_outputs; eauto.
eapply correspond_preserved_snoc; eauto; rewrite update_eq by auto; repeat find_rewrite; auto.
- eapply correspond_preserved_primary_same_no_outputs; eauto.
eapply correspond_preserved_snoc; eauto; rewrite update_eq by auto; repeat find_rewrite; auto.
Qed.

Lemma step_async_outputs_m :
forall net net' tr,
step_async net net' tr ->
(inputs_m tr = [] /\ (outputs_m tr = [] /\ nwState net Primary = nwState net' Primary)) \/
(inputs_m tr = [] /\ exists os, outputs_m tr = [os]) \/
(exists i, inputs_m tr = [i]).