YES TRS: not(true()) -> false() not(false()) -> true() odd(0()) -> false() odd(s(x)) -> not(odd(x)) +(x,0()) -> x +(x,s(y)) -> s(+(x,y)) +(s(x),y) -> s(+(x,y)) max/plus interpretations on N: not_A(x1) = max{2, 3} not#_A(x1) = max{2, -2} true_A = 3 true#_A = 1 false_A = 3 false#_A = 0 odd_A(x1) = max{1, 3} odd#_A(x1) = max{3, -1} 0_A = 1 0#_A = 1 s_A(x1) = max{2, 4} s#_A(x1) = max{1, 4} +_A(x1,x2) = max{4, 1 + x1, 3 + x2} +#_A(x1,x2) = max{4, 4, 4} precedence: + > s > true = odd = 0 > false > not