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(* as published by the Free Software Foundation; either version 2.1   *)
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(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the      *)
(* GNU General Public License for more details.                       *)
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(* 02110-1301 USA                                                     *)
Require Export DistributedReferenceCounting.machine1.invariant5.
Require Export DistributedReferenceCounting.machine1.invariant7.
Unset Standard Proposition Elimination Names.

Lemma safety2 :
forall c : Config,
legal c ->
forall s1 s2 : Site,
In_queue Message copy (bm c s1 s2) -> (st c owner > 0)%Z.