YES We show the termination of the TRS R: g(s(x)) -> f(x) f(|0|()) -> s(|0|()) f(s(x)) -> s(s(g(x))) g(|0|()) -> |0|() -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: g#(s(x)) -> f#(x) p2: f#(s(x)) -> g#(x) and R consists of: r1: g(s(x)) -> f(x) r2: f(|0|()) -> s(|0|()) r3: f(s(x)) -> s(s(g(x))) r4: g(|0|()) -> |0|() The estimated dependency graph contains the following SCCs: {p1, p2} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: g#(s(x)) -> f#(x) p2: f#(s(x)) -> g#(x) and R consists of: r1: g(s(x)) -> f(x) r2: f(|0|()) -> s(|0|()) r3: f(s(x)) -> s(s(g(x))) r4: g(|0|()) -> |0|() The set of usable rules consists of r2, r4 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: g#_A(x1) = x1 s_A(x1) = x1 + 2 f#_A(x1) = x1 f_A(x1) = 6 |0|_A() = 1 g_A(x1) = 3 base order 2: precedence: f > g > s > f# = |0| > g# partial status: pi(g#) = [] pi(s) = [1] pi(f#) = [1] pi(f) = [] pi(|0|) = [] pi(g) = [] The following rules are removed: p1 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: f#(s(x)) -> g#(x) and R consists of: r1: g(s(x)) -> f(x) r2: f(|0|()) -> s(|0|()) r3: f(s(x)) -> s(s(g(x))) r4: g(|0|()) -> |0|() The estimated dependency graph contains the following SCCs: (no SCCs)