MAYBE
0.08/0.19	MAYBE
0.08/0.19	
0.08/0.19	Problem:
0.08/0.19	 double(x) -> permute(x,x,a())
0.08/0.19	 permute(x,y,a()) -> permute(isZero(x),x,b())
0.08/0.19	 permute(false(),x,b()) -> permute(ack(x,x),p(x),c())
0.08/0.19	 permute(true(),x,b()) -> 0()
0.08/0.19	 permute(y,x,c()) -> s(s(permute(x,y,a())))
0.08/0.19	 p(0()) -> 0()
0.08/0.19	 p(s(x)) -> x
0.08/0.19	 ack(0(),x) -> plus(x,s(0()))
0.08/0.19	 ack(s(x),0()) -> ack(x,s(0()))
0.08/0.19	 ack(s(x),s(y)) -> ack(x,ack(s(x),y))
0.08/0.19	 plus(0(),y) -> y
0.08/0.19	 plus(s(x),y) -> plus(x,s(y))
0.08/0.19	 plus(x,s(s(y))) -> s(plus(s(x),y))
0.08/0.19	 plus(x,s(0())) -> s(x)
0.08/0.19	 plus(x,0()) -> x
0.08/0.19	 isZero(0()) -> true()
0.08/0.19	 isZero(s(x)) -> false()
0.08/0.19	
0.08/0.19	Proof:
0.08/0.19	 Open
0.08/0.19	EOF