MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 le(0(),y) -> true()
0.08/0.18	 le(s(x),0()) -> false()
0.08/0.18	 le(s(x),s(y)) -> le(x,y)
0.08/0.18	 zero(0()) -> true()
0.08/0.18	 zero(s(x)) -> false()
0.08/0.18	 id(0()) -> 0()
0.08/0.18	 id(s(x)) -> s(id(x))
0.08/0.18	 minus(x,0()) -> x
0.08/0.18	 minus(s(x),s(y)) -> minus(x,y)
0.08/0.18	 mod(x,y) -> if_mod(zero(x),zero(y),le(y,x),id(x),id(y))
0.08/0.18	 if_mod(true(),b1,b2,x,y) -> 0()
0.08/0.18	 if_mod(false(),b1,b2,x,y) -> if2(b1,b2,x,y)
0.08/0.18	 if2(true(),b2,x,y) -> 0()
0.08/0.18	 if2(false(),b2,x,y) -> if3(b2,x,y)
0.08/0.18	 if3(true(),x,y) -> mod(minus(x,y),s(y))
0.08/0.18	 if3(false(),x,y) -> x
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.19	EOF