YES TRS: double(0()) -> 0() double(s(x)) -> s(s(double(x))) +(x,0()) -> x +(x,s(y)) -> s(+(x,y)) +(s(x),y) -> s(+(x,y)) double(x) -> +(x,x) max/plus interpretations on N: double_A(x1) = max{1, 2 + x1} double#_A(x1) = max{0, 2} 0_A = 2 0#_A = 3 s_A(x1) = max{5, 2} s#_A(x1) = max{1, 1} +_A(x1,x2) = max{2, 1 + x1, 1 + x2} +#_A(x1,x2) = max{1, 1, -4} precedence: double > 0 = + > s