YES linear polynomial interpretations on negative integers: min_A(x1) = x1 cons_A(x1,x2) = 0 nil_A = -2 le_A(x1,x2) = x2 s_A(x1) = 0 0_A = -1 true_A = 0 false_A = -1 the condition le(x1,min(nil())) ->> false() is unsatisfiable for all substitutions.