MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { a(x1) -> x1 , a(x1) -> b(c(x1)) , c(b(b(b(x1)))) -> b(b(a(a(x1)))) } Obligation: innermost runtime complexity Answer: MAYBE The input cannot be shown compatible Arrrr..