MAYBE We are left with following problem, upon which TcT provides the certificate MAYBE. Strict Trs: { a__g(X) -> a__h(X) , a__g(X) -> g(X) , a__h(X) -> h(X) , a__h(d()) -> a__g(c()) , a__c() -> d() , a__c() -> c() , mark(d()) -> d() , mark(c()) -> a__c() , mark(g(X)) -> a__g(X) , mark(h(X)) -> a__h(X) } Obligation: innermost runtime complexity Answer: MAYBE The input cannot be shown compatible Arrrr..