YES TRS: sqr(0()) -> 0() sqr(s(x)) -> +(sqr(x),s(double(x))) double(0()) -> 0() double(s(x)) -> s(s(double(x))) +(x,0()) -> x +(x,s(y)) -> s(+(x,y)) sqr(s(x)) -> s(+(sqr(x),double(x))) max/plus interpretations on N: sqr_A(x1) = max{9, -5} sqr#_A(x1) = max{1, -3} 0_A = 1 0#_A = 0 s_A(x1) = max{3, -4} s#_A(x1) = max{0, 1} +_A(x1,x2) = max{1, x1, 6 + x2} +#_A(x1,x2) = max{1, 1, 1} double_A(x1) = max{3, -5} double#_A(x1) = max{1, -2} precedence: sqr > + = double > 0 = s