YES Trs: {f(a(), f(a(), x)) -> f(x, f(a(), f(f(a(), a()), a())))} Comment: We consider a non-duplicating trs. BOUND: Automaton: { a_1() -> q3, a_0() -> q2, f_1(q6, q6) -> q2, f_1(q5, q6) -> q2, f_1(q4, q3) -> q5, f_1(q3, q5) -> q6, f_1(q3, q3) -> q4, f_1(q2, q6) -> q2, f_0(q2, q2) -> q2} Strict: {} Qed