TRS: { times(x, y) -> help(x, y, 0()), help(x, y, c) -> if(lt(c, y), x, y, c), if(true(), x, y, c) -> plus(x, help(x, y, s(c))), if(false(), x, y, c) -> 0(), lt(0(), s(x)) -> true(), lt(s(x), 0()) -> false(), lt(s(x), s(y)) -> lt(x, y), plus(x, 0()) -> x, plus(0(), x) -> x, plus(x, s(y)) -> s(plus(x, y)), plus(s(x), y) -> s(plus(x, y))} Fail