YES We show the termination of the TRS R: g(|0|()) -> |0|() g(s(x)) -> f(g(x)) f(|0|()) -> |0|() -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: g#(s(x)) -> f#(g(x)) p2: g#(s(x)) -> g#(x) and R consists of: r1: g(|0|()) -> |0|() r2: g(s(x)) -> f(g(x)) r3: f(|0|()) -> |0|() The estimated dependency graph contains the following SCCs: {p2} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: g#(s(x)) -> g#(x) and R consists of: r1: g(|0|()) -> |0|() r2: g(s(x)) -> f(g(x)) r3: f(|0|()) -> |0|() The set of usable rules consists of r3 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: g#_A(x1) = max{4, x1 + 2} s_A(x1) = max{6, x1 + 3} f_A(x1) = max{4, x1 - 6} |0|_A = 0 base order 2: precedence: s > g# = f > |0| partial status: pi(g#) = [1] pi(s) = [1] pi(f) = [] pi(|0|) = [] The following rules are removed: p1 Then no dependency pair remains.