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{0, 4 + x1} 2nd#_A(x1) = max{0, 4 + x1} cons_A(x1,x2) = max{7, 1 + x1, x2} cons#_A(x1,x2) = max{7, 1 + x1, x2} n__cons_A(x1,x2) = max{6, 1 + x1, x2} n__cons#_A(x1,x2) = max{6, 1 + x1, x2} activate_A(x1) = max{8, 5 + x1} activate#_A(x1) = max{8, 5 + x1} from_A(x1) = max{7, 4 + x1} from#_A(x1) = max{7, 4 + x1} n__from_A(x1) = max{7, 4 + x1} n__from#_A(x1) = max{7, 4 + x1} n__s_A(x1) = max{1, x1} n__s#_A(x1) = max{1, x1} s_A(x1) = max{7, x1} s#_A(x1) = max{7, x1} precedence: 2nd > activate > from = s > cons = n__from = n__s > n__cons