Opaque Normalize_e.
(** Def 1 of (Rose) *)
Definition Succ_e : Cobham :=
Rec
(Comp 0 (Succ true) [Zero])
(Comp 2 (Succ true) [Proj 2 0])
(Comp 2 (Succ false) [Proj 2 1])
(Comp 1 (Succ true) [Proj 1 0]).

Lemma length_Succ : forall l,
length (Sem Succ_e l) <= length (Sem (Comp 1 (Succ true) [Proj 1 0]) l).