YES weighted path orer with linear polynomial on natural numbers: g_A(x1,x2) = x2 + 1 h_A(x1) = 0 f_A(x1,x2) = x1 + 2 a_A = 3 b_A = 0 F_A(x1,x2) = x2 precedence: g > f > b > F > a > h status: g: [] h: [] f: [] a: [] b: [] F: [2] the condition F(x,g(x,b())) ->> F(y,a()) is unsatisfiable for all substitutions.