YES We show the termination of the TRS R: f(s(x),y,y) -> f(y,x,s(x)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: f#(s(x),y,y) -> f#(y,x,s(x)) and R consists of: r1: f(s(x),y,y) -> f(y,x,s(x)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: f#(s(x),y,y) -> f#(y,x,s(x)) and R consists of: r1: f(s(x),y,y) -> f(y,x,s(x)) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: f#_A(x1,x2,x3) = max{x1 + 4, x3 + 4} s_A(x1) = max{3, x1 - 2} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: f#_A(x1,x2,x3) = max{0, x1 - 6, x2 - 7, x3 - 6} s_A(x1) = x1 + 5 f#!_A(x1,x2,x3) = max{x1 - 2, x2 + 2, x3 - 6} s!_A(x1) = max{3, x1 - 8} partial status: pi(f#) = [1] pi(s) = [] The following rules are removed: p1 Then no dependency pair remains.