699.87/299.38	MAYBE
699.87/299.38	
699.87/299.38	Problem:
699.87/299.38	 strict:
699.87/299.38	  le(0(),y) -> true()
699.87/299.38	  le(s(x),0()) -> false()
699.87/299.38	  le(s(x),s(y)) -> le(x,y)
699.87/299.38	  minus(0(),y) -> 0()
699.87/299.38	  minus(s(x),y) -> if_minus(le(s(x),y),s(x),y)
699.87/299.38	  if_minus(true(),s(x),y) -> 0()
699.87/299.38	  if_minus(false(),s(x),y) -> s(minus(x,y))
699.87/299.38	  mod(0(),y) -> 0()
699.87/299.38	  mod(s(x),0()) -> 0()
699.87/299.38	  mod(s(x),s(y)) -> if_mod(le(y,x),s(x),s(y))
699.87/299.38	  if_mod(true(),s(x),s(y)) -> mod(minus(x,y),s(y))
699.87/299.38	  if_mod(false(),s(x),s(y)) -> s(x)
699.87/299.38	 weak:
699.87/299.38	  rand(x) -> x
699.87/299.38	  rand(x) -> rand(s(x))
699.87/299.38	
699.87/299.38	Proof:
699.87/299.38	 Open
699.87/299.38	EOF