YES We show the termination of the TRS R: f(|0|(),|1|(),x) -> f(s(x),x,x) f(x,y,s(z)) -> s(f(|0|(),|1|(),z)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: f#(|0|(),|1|(),x) -> f#(s(x),x,x) p2: f#(x,y,s(z)) -> f#(|0|(),|1|(),z) and R consists of: r1: f(|0|(),|1|(),x) -> f(s(x),x,x) r2: f(x,y,s(z)) -> s(f(|0|(),|1|(),z)) The estimated dependency graph contains the following SCCs: {p1, p2} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: f#(|0|(),|1|(),x) -> f#(s(x),x,x) p2: f#(x,y,s(z)) -> f#(|0|(),|1|(),z) and R consists of: r1: f(|0|(),|1|(),x) -> f(s(x),x,x) r2: f(x,y,s(z)) -> s(f(|0|(),|1|(),z)) 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) = 0 |0|_A = 0 |1|_A = 9 s_A(x1) = max{0, 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 - 20, x2 - 13, x3 - 13} |0|_A = 19 |1|_A = 12 s_A(x1) = max{11, x1 + 7} f#!_A(x1,x2,x3) = max{2, x1 - 21, x3 - 8} |0|!_A = 1 |1|!_A = 4 s!_A(x1) = max{3, x1 - 7} partial status: pi(f#) = [] pi(|0|) = [] pi(|1|) = [] pi(s) = [] The following rules are removed: p2 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: f#(|0|(),|1|(),x) -> f#(s(x),x,x) and R consists of: r1: f(|0|(),|1|(),x) -> f(s(x),x,x) r2: f(x,y,s(z)) -> s(f(|0|(),|1|(),z)) The estimated dependency graph contains the following SCCs: (no SCCs)