MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { minus(x, 0()) -> x , minus(s(x), s(y)) -> minus(x, y) , le(0(), y) -> true() , le(s(x), 0()) -> false() , le(s(x), s(y)) -> le(x, y) , quot(x, s(y)) -> if_quot(le(s(y), x), x, s(y)) , if_quot(true(), x, y) -> s(quot(minus(x, y), y)) , if_quot(false(), x, y) -> 0() } Obligation: innermost runtime complexity Answer: MAYBE The input cannot be shown compatible Arrrr..