YES TRS: 2nd(cons(X,n__cons(Y,Z))) -> activate(Y) from(X) -> cons(X,n__from(n__s(X))) cons(X1,X2) -> n__cons(X1,X2) from(X) -> n__from(X) s(X) -> n__s(X) activate(n__cons(X1,X2)) -> cons(activate(X1),X2) activate(n__from(X)) -> from(activate(X)) activate(n__s(X)) -> s(activate(X)) activate(X) -> X max/plus interpretations on N: 2nd_A(x1) = max{5, x1} 2nd#_A(x1) = max{0, 8} cons_A(x1,x2) = max{4, x1, 2 + x2} cons#_A(x1,x2) = max{4, 1, 6} n__cons_A(x1,x2) = max{0, x1, 1 + x2} n__cons#_A(x1,x2) = max{0, 2, 0} activate_A(x1) = max{5, 2 + x1} activate#_A(x1) = max{5, 8} from_A(x1) = max{7, 2 + x1} from#_A(x1) = max{7, 2} n__from_A(x1) = max{5, 2 + x1} n__from#_A(x1) = max{1, 3} n__s_A(x1) = max{0, -1} n__s#_A(x1) = max{3, 1} s_A(x1) = max{3, -2} s#_A(x1) = max{4, 4} precedence: 2nd = n__cons = s > activate > from > cons = n__from = n__s