Section REC_COP2_ALT.
(* structure de file d'attente *)
Variable c0 : Config.
Variable s0 s2 : Site.

(* Specifications: *)
Lemma rcop2_trans_D :
(rt c0 s0 = false -> D_queue (bm c0 s0 owner)) ->
rt (rec_copy2_trans c0 s2) s0 = false ->
D_queue (bm (rec_copy2_trans c0 s2) s0 owner).
Lemma rcop2_trans_alt :
alternate (bm c0 s0 owner) ->
alternate (bm (rec_copy2_trans c0 s2) s0 owner).