MAYBE
262.47/66.45	MAYBE
262.47/66.45	
262.47/66.45	Problem:
262.47/66.45	 top1(free(x),y) -> top2(check(new(x)),y)
262.47/66.45	 top1(free(x),y) -> top2(new(x),check(y))
262.47/66.45	 top1(free(x),y) -> top2(check(x),new(y))
262.47/66.45	 top1(free(x),y) -> top2(x,check(new(y)))
262.47/66.45	 top2(x,free(y)) -> top1(check(new(x)),y)
262.47/66.45	 top2(x,free(y)) -> top1(new(x),check(y))
262.47/66.45	 top2(x,free(y)) -> top1(check(x),new(y))
262.47/66.45	 top2(x,free(y)) -> top1(x,check(new(y)))
262.47/66.45	 new(free(x)) -> free(new(x))
262.47/66.45	 old(free(x)) -> free(old(x))
262.47/66.45	 new(serve()) -> free(serve())
262.47/66.45	 old(serve()) -> free(serve())
262.47/66.45	 check(free(x)) -> free(check(x))
262.47/66.45	 check(new(x)) -> new(check(x))
262.47/66.45	 check(old(x)) -> old(check(x))
262.47/66.45	 check(old(x)) -> old(x)
262.47/66.45	
262.47/66.45	Proof:
262.47/66.45	 Open
262.47/66.46	EOF