YES We show the termination of the TRS R: .(|1|(),x) -> x .(x,|1|()) -> x .(i(x),x) -> |1|() .(x,i(x)) -> |1|() i(|1|()) -> |1|() i(i(x)) -> x .(i(y),.(y,z)) -> z .(y,.(i(y),z)) -> z .(.(x,y),z) -> .(x,.(y,z)) i(.(x,y)) -> .(i(y),i(x)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: .#(.(x,y),z) -> .#(x,.(y,z)) p2: .#(.(x,y),z) -> .#(y,z) p3: i#(.(x,y)) -> .#(i(y),i(x)) p4: i#(.(x,y)) -> i#(y) p5: i#(.(x,y)) -> i#(x) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The estimated dependency graph contains the following SCCs: {p4, p5} {p1, p2} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: i#(.(x,y)) -> i#(x) p2: i#(.(x,y)) -> i#(y) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 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: model-based reduction triple (=A, >=A!, >A!): finite algebra: carrier: {0,1} interpretations: i#_A(0) = 0 i#_A(1) = 0 ._A(0,0) = 1 ._A(0,1) = 0 ._A(1,0) = 0 ._A(1,1) = 1 |1|_A = 1 i_A(0) = 0 i_A(1) = 1 i#!_A(0) = 0 i#!_A(1) = 0 .!_A(0,0) = 0 .!_A(0,1) = 0 .!_A(1,0) = 0 .!_A(1,1) = 0 |1|!_A = 0 i!_A(0) = 1 i!_A(1) = 1 partial status: pi(i#) = [1] pi(.) = [1, 2] pi(|1|) = [] pi(i) = [1] The following rules are removed: p1 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: i#(.(x,y)) -> i#(y) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: i#(.(x,y)) -> i#(y) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 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: model-based reduction triple (=A, >=A!, >A!): finite algebra: carrier: {0,1} interpretations: i#_A(0) = 0 i#_A(1) = 0 ._A(0,0) = 1 ._A(0,1) = 0 ._A(1,0) = 0 ._A(1,1) = 1 |1|_A = 1 i_A(0) = 0 i_A(1) = 1 i#!_A(0) = 0 i#!_A(1) = 0 .!_A(0,0) = 0 .!_A(0,1) = 0 .!_A(1,0) = 0 .!_A(1,1) = 0 |1|!_A = 0 i!_A(0) = 1 i!_A(1) = 1 partial status: pi(i#) = [1] pi(.) = [1, 2] pi(|1|) = [] pi(i) = [1] The following rules are removed: p1 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: .#(.(x,y),z) -> .#(x,.(y,z)) p2: .#(.(x,y),z) -> .#(y,z) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 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: model-based reduction triple (=A, >=A!, >A!): finite algebra: carrier: {0,1} interpretations: .#_A(0,0) = 0 .#_A(0,1) = 0 .#_A(1,0) = 0 .#_A(1,1) = 0 ._A(0,0) = 0 ._A(0,1) = 1 ._A(1,0) = 1 ._A(1,1) = 0 |1|_A = 0 i_A(0) = 0 i_A(1) = 1 .#!_A(0,0) = 0 .#!_A(0,1) = 0 .#!_A(1,0) = 0 .#!_A(1,1) = 0 .!_A(0,0) = 0 .!_A(0,1) = 0 .!_A(1,0) = 0 .!_A(1,1) = 0 |1|!_A = 1 i!_A(0) = 1 i!_A(1) = 1 partial status: pi(.#) = [1] pi(.) = [1, 2] pi(|1|) = [] pi(i) = [1] The following rules are removed: p2 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: .#(.(x,y),z) -> .#(x,.(y,z)) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: .#(.(x,y),z) -> .#(x,.(y,z)) and R consists of: r1: .(|1|(),x) -> x r2: .(x,|1|()) -> x r3: .(i(x),x) -> |1|() r4: .(x,i(x)) -> |1|() r5: i(|1|()) -> |1|() r6: i(i(x)) -> x r7: .(i(y),.(y,z)) -> z r8: .(y,.(i(y),z)) -> z r9: .(.(x,y),z) -> .(x,.(y,z)) r10: i(.(x,y)) -> .(i(y),i(x)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 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: model-based reduction triple (=A, >=A!, >A!): finite algebra: carrier: {0,1} interpretations: .#_A(0,0) = 0 .#_A(0,1) = 0 .#_A(1,0) = 0 .#_A(1,1) = 0 ._A(0,0) = 0 ._A(0,1) = 1 ._A(1,0) = 1 ._A(1,1) = 0 |1|_A = 0 i_A(0) = 0 i_A(1) = 1 .#!_A(0,0) = 0 .#!_A(0,1) = 0 .#!_A(1,0) = 0 .#!_A(1,1) = 0 .!_A(0,0) = 0 .!_A(0,1) = 0 .!_A(1,0) = 0 .!_A(1,1) = 0 |1|!_A = 1 i!_A(0) = 1 i!_A(1) = 1 partial status: pi(.#) = [1] pi(.) = [1, 2] pi(|1|) = [] pi(i) = [1] The following rules are removed: p1 Then no dependency pair remains.