End REC_COP3_XY.
Section REC_COP3_ALT.
(* structure de file d'attente *)
Variable c0 : Config.
Variable s0 s1 s2 : Site.
Hypothesis rt_true : rt c0 s2 = false.
Hypothesis not_owner : s1 <> owner.

(* Specifications: *)
Lemma rcop3_trans_D :
(rt c0 s0 = false -> D_queue (bm c0 s0 owner)) ->
rt (rec_copy3_trans c0 s1 s2) s0 = false ->
D_queue (bm (rec_copy3_trans c0 s1 s2) s0 owner).
Lemma rcop3_trans_alt :
D_queue (bm c0 s2 owner) ->
alternate (bm c0 s0 owner) ->
alternate (bm (rec_copy3_trans c0 s1 s2) s0 owner).