let s = StateSet.choose cf in
if (Algebra.is_rec a s fst) && (Algebra.is_rec a s snd)
&& (Algebra.is_final_marking a s)
- then RS.mk_quick_subtree default llist 1 tree tag'
+ then RS.mk_quick_tag_loop default llist 1 tree tag'
else default
else default
| _ ->