MAYBE

We are left with following problem, upon which TcT provides the
certificate MAYBE.

Strict Trs:
  { f(x, x) -> f(0(), 1())
  , f(x, 2()) -> 2()
  , f(2(), x) -> 2()
  , 0() -> 2()
  , 1() -> 2() }
Obligation:
  innermost runtime complexity
Answer:
  MAYBE

The input cannot be shown compatible

Arrrr..