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 le_1_length_Succ v :
1 <= length (Sem Succ_e [v]).