TIMEOUT

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

Strict Trs:
  { sum(cons(s(n), x), cons(m, y)) -> sum(cons(n, x), cons(s(m), y))
  , sum(cons(0(), x), y) -> sum(x, y)
  , sum(nil(), y) -> y
  , empty(cons(n, x)) -> false()
  , empty(nil()) -> true()
  , tail(cons(n, x)) -> x
  , tail(nil()) -> nil()
  , head(cons(n, x)) -> n
  , weight(x) -> if(empty(x), empty(tail(x)), x)
  , if(true(), b, x) -> weight_undefined_error()
  , if(false(), b, x) -> if2(b, x)
  , if2(true(), x) -> head(x)
  , if2(false(), x) -> weight(sum(x, cons(0(), tail(tail(x))))) }
Obligation:
  innermost runtime complexity
Answer:
  TIMEOUT

Computation stopped due to timeout after 10.0 seconds.

Arrrr..