TIMEOUT

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

Strict Trs:
  { a(d(x)) -> d(c(b(a(x))))
  , a(c(x)) -> x
  , b(d(x)) -> x
  , b(c(x)) -> c(d(a(b(x)))) }
Obligation:
  innermost runtime complexity
Answer:
  TIMEOUT

Computation stopped due to timeout after 60.0 seconds.

Arrrr..