YES TRS: b(b(0(),y),x) -> y c(c(c(y))) -> c(c(a(a(c(b(0(),y)),0()),0()))) a(y,0()) -> b(y,0()) max/plus interpretations on N: b_A(x1,x2) = max{26, -16 + x1, 16 + x2} b#_A(x1,x2) = max{0, 0, 0} 0_A = 10 0#_A = 4 c_A(x1) = max{27, 21 + x1} c#_A(x1) = max{2, 6 + x1} a_A(x1,x2) = max{26, -16 + x1, -26} a#_A(x1,x2) = max{5, 1, 3} precedence: c > a > b = 0