TIMEOUT

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

Strict Trs:
  { first(0(), X) -> nil()
  , first(s(X), cons(Y, Z)) -> cons(Y, first(X, Z))
  , from(X) -> cons(X, from(s(X))) }
Obligation:
  innermost runtime complexity
Answer:
  TIMEOUT

Computation stopped due to timeout after 10.0 seconds.

Arrrr..