Proof using.
unfold deghost.
simpl. intuition.
apply in_map_iff.
eexists; eauto.
Qed.
Ltac forward_invariant :=
match goal with
| [ H : refined_raft_intermediate_reachable _, H' : _ |- _ ] =>
apply H' in H; clear H'
end.
Ltac forward_nw_invariant :=
match goal with
| [ H : forall _ _ _ _ _ _ _, In _ _ -> pBody _ = _ -> _,
H' : In _ _,
H'' : pBody _ = _ |- _ ] =>
specialize (H _ _ _ _ _ _ _ H' H'')
end.

Lemma entries_contiguous_nw_invariant :
forall net,
refined_raft_intermediate_reachable net ->
entries_contiguous_nw net.