YES We show the termination of the TRS R: div(|0|(),y) -> |0|() div(x,y) -> quot(x,y,y) quot(|0|(),s(y),z) -> |0|() quot(s(x),s(y),z) -> quot(x,y,z) quot(x,|0|(),s(z)) -> s(div(x,s(z))) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: div#(x,y) -> quot#(x,y,y) p2: quot#(s(x),s(y),z) -> quot#(x,y,z) p3: quot#(x,|0|(),s(z)) -> div#(x,s(z)) and R consists of: r1: div(|0|(),y) -> |0|() r2: div(x,y) -> quot(x,y,y) r3: quot(|0|(),s(y),z) -> |0|() r4: quot(s(x),s(y),z) -> quot(x,y,z) r5: quot(x,|0|(),s(z)) -> s(div(x,s(z))) The estimated dependency graph contains the following SCCs: {p1, p2, p3} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: div#(x,y) -> quot#(x,y,y) p2: quot#(x,|0|(),s(z)) -> div#(x,s(z)) p3: quot#(s(x),s(y),z) -> quot#(x,y,z) and R consists of: r1: div(|0|(),y) -> |0|() r2: div(x,y) -> quot(x,y,y) r3: quot(|0|(),s(y),z) -> |0|() r4: quot(s(x),s(y),z) -> quot(x,y,z) r5: quot(x,|0|(),s(z)) -> s(div(x,s(z))) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: trivial reduction triple (T x T, T x T, Φ) base order 2: lexicographic combination of reduction triples: 1. marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: div#_A(x1,x2) = 0 quot#_A(x1,x2,x3) = 0 |0|_A() = 3 s_A(x1) = 0 div#!_A(x1,x2) = x2 + 2 quot#!_A(x1,x2,x3) = 2 |0|!_A() = 4 s!_A(x1) = 3 2. marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: div#_A(x1,x2) = max{1, x2 - 6} quot#_A(x1,x2,x3) = 1 |0|_A = 10 s_A(x1) = 5 div#!_A(x1,x2) = max{9, x2 + 3} quot#!_A(x1,x2,x3) = max{1, x2 - 1} |0|!_A = 10 s!_A(x1) = x1 + 5 partial status: pi(div#) = [1] pi(quot#) = [1] pi(|0|) = [] pi(s) = [1] The following rules are removed: p1, p3 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: quot#(x,|0|(),s(z)) -> div#(x,s(z)) and R consists of: r1: div(|0|(),y) -> |0|() r2: div(x,y) -> quot(x,y,y) r3: quot(|0|(),s(y),z) -> |0|() r4: quot(s(x),s(y),z) -> quot(x,y,z) r5: quot(x,|0|(),s(z)) -> s(div(x,s(z))) The estimated dependency graph contains the following SCCs: (no SCCs)