TIMEOUT

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

Strict Trs:
  { from(X) -> cons(X, n__from(s(X)))
  , from(X) -> n__from(X)
  , first(X1, X2) -> n__first(X1, X2)
  , first(s(X), cons(Y, Z)) -> cons(Y, n__first(X, activate(Z)))
  , first(0(), Z) -> nil()
  , activate(X) -> X
  , activate(n__from(X)) -> from(X)
  , activate(n__first(X1, X2)) -> first(X1, X2)
  , sel(s(X), cons(Y, Z)) -> sel(X, activate(Z))
  , sel(0(), cons(X, Z)) -> X }
Obligation:
  innermost runtime complexity
Answer:
  TIMEOUT

Computation stopped due to timeout after 10.0 seconds.

Arrrr..