Definition no_rt (c : Config) :=
  forall s1 : Site, In s1 LS -> s1 <> owner -> rt c s1 = false.

Lemma decide_no_copy_successor : forall c : Config, legal c -> (exists t : class_trans c, ~ copy_p c t /\ legal (transition c t)) \/ (forall t : class_trans c, copy_p c t).