0.00/0.01	YES
0.00/0.01	; certificate:
0.00/0.01	(0
0.00/0.01	 (rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	 (rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	 (size 1 2 0))
0.00/0.01	(1 (rr2-rel (equality) 0 1) (rr2-rel (equality) 0 1) (size 1 6 0))
0.00/0.01	(2 (not 1) (not (rr2-rel (equality) 0 1)))
0.00/0.01	(3
0.00/0.01	 (and (0 2))
0.00/0.01	 (extend-sig 1
0.00/0.01	  (and ((rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	    (not (rr2-rel (equality) 0 1)))))
0.00/0.01	 (size 0 0 0))
0.00/0.01	(4
0.00/0.01	 (exists 3)
0.00/0.01	 (exists (extend-sig 1
0.00/0.01	   (and ((rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	     (not (rr2-rel (equality) 0 1)))))))
0.00/0.01	(5
0.00/0.01	 (exists 4)
0.00/0.01	 (exists (exists (extend-sig 1
0.00/0.01	    (and ((rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	      (not (rr2-rel (equality) 0 1))))))))
0.00/0.01	(6
0.00/0.01	 (not 5)
0.00/0.01	 (not (exists (exists (extend-sig 1
0.00/0.01	     (and ((rr2-rel (compose (inverse (stepsnf (0))) (stepsnf (0))) 0 1)
0.00/0.01	       (not (rr2-rel (equality) 0 1)))))))))
0.00/0.01	(7
0.00/0.01	 (nnf+ 6)
0.00/0.01	 (extend-sig 1
0.00/0.01	  (forall (forall (or ((not (rr2-rel (compose (inverse (stepsnf (0)))
0.00/0.01	         (stepsnf (0)))
0.00/0.01	        0
0.00/0.01	        1))
0.00/0.01	      (rr2-rel (equality) 0 1)))))))
0.00/0.01	(nonempty 7)
0.00/0.01	EOF