End REC_COP1_XY.
Section REC_COP1_ALT.
(* structure de file d'attente *)
Variable c0 : Config.
Variable s0 s1 s2 : Site.

Lemma rcop1_trans_alt :
alternate (bm c0 s0 owner) ->
alternate (bm (rec_copy1_trans c0 s1 s2) s0 owner).