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)
  , f(0()) -> s(0())
  , f(s(x)) -> minus(s(x), g(f(x)))
  , g(0()) -> 0()
  , g(s(x)) -> minus(s(x), f(g(x))) }
Obligation:
  innermost runtime complexity
Answer:
  MAYBE

The input cannot be shown compatible

Arrrr..