TIMEOUT

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

Strict Trs:
  { app(nil(), xs) -> nil()
  , app(cons(x, xs), ys) -> cons(x, app(xs, ys))
  , rev(nil()) -> nil()
  , rev(cons(x, xs)) -> append(xs, rev(cons(x, nil())))
  , shuffle(nil()) -> nil()
  , shuffle(cons(x, xs)) -> cons(x, shuffle(rev(xs))) }
Obligation:
  innermost runtime complexity
Answer:
  TIMEOUT

Computation stopped due to timeout after 10.0 seconds.

Arrrr..