YES We show the termination of the TRS R: plus(x,|0|()) -> x plus(|0|(),y) -> y plus(s(x),y) -> s(plus(x,y)) times(|0|(),y) -> |0|() times(s(|0|()),y) -> y times(s(x),y) -> plus(y,times(x,y)) 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))) div(div(x,y),z) -> div(x,times(y,z)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: plus#(s(x),y) -> plus#(x,y) p2: times#(s(x),y) -> plus#(y,times(x,y)) p3: times#(s(x),y) -> times#(x,y) p4: div#(x,y) -> quot#(x,y,y) p5: quot#(s(x),s(y),z) -> quot#(x,y,z) p6: quot#(x,|0|(),s(z)) -> div#(x,s(z)) p7: div#(div(x,y),z) -> div#(x,times(y,z)) p8: div#(div(x,y),z) -> times#(y,z) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The estimated dependency graph contains the following SCCs: {p4, p5, p6, p7} {p3} {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: div#(div(x,y),z) -> div#(x,times(y,z)) p2: div#(x,y) -> quot#(x,y,y) p3: quot#(x,|0|(),s(z)) -> div#(x,s(z)) p4: quot#(s(x),s(y),z) -> quot#(x,y,z) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The set of usable rules consists of r4, r7, r9 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: div#_A(x1,x2) = x1 + 5 div_A(x1,x2) = max{15, x1 + 10, x2 + 3} times_A(x1,x2) = max{21, x1 - 13, x2 - 6} quot#_A(x1,x2,x3) = x1 + 5 |0|_A = 4 s_A(x1) = max{5, x1 + 1} quot_A(x1,x2,x3) = max{16, x1 - 6, x2 - 6, x3 - 6} base order 2: precedence: div = times = quot > s > |0| > div# = quot# partial status: pi(div#) = [] pi(div) = [2] pi(times) = [] pi(quot#) = [] pi(|0|) = [] pi(s) = [] pi(quot) = [] The following rules are removed: p1 -- SCC decomposition. 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: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,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#(s(x),s(y),z) -> quot#(x,y,z) p3: quot#(x,|0|(),s(z)) -> div#(x,s(z)) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The set of usable rules consists of r4, r7, r9 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: div#_A(x1,x2) = x1 + 1 quot#_A(x1,x2,x3) = x1 + 1 s_A(x1) = max{6, x1 + 2} |0|_A = 10 times_A(x1,x2) = max{13, x1 - 11, x2 - 11} div_A(x1,x2) = max{12, x1 - 13, x2 - 27} quot_A(x1,x2,x3) = max{11, x1 - 14, x2 - 28} base order 2: precedence: times > div > div# = quot# = s = quot > |0| partial status: pi(div#) = [] pi(quot#) = [] pi(s) = [1] pi(|0|) = [] pi(times) = [] pi(div) = [] pi(quot) = [] The following rules are removed: p2 -- SCC decomposition. 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)) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,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: div#(x,y) -> quot#(x,y,y) p2: quot#(x,|0|(),s(z)) -> div#(x,s(z)) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The set of usable rules consists of r4, r7, r9, r11 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: div#_A(x1,x2) = max{4, x2 + 2} quot#_A(x1,x2,x3) = max{0, x2 - 1, x3 - 1} |0|_A = 6 s_A(x1) = 2 times_A(x1,x2) = max{7, x1 - 16, x2 - 16} div_A(x1,x2) = max{16, x1 - 7, x2 + 15} quot_A(x1,x2,x3) = max{16, x1 + 1, x2 - 7, x3 - 1} base order 2: precedence: times > div = quot > quot# = |0| > div# > s partial status: pi(div#) = [] pi(quot#) = [] pi(|0|) = [] pi(s) = [] pi(times) = [] pi(div) = [2] pi(quot) = [] The following rules are removed: p1 -- 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: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The estimated dependency graph contains the following SCCs: (no SCCs) -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: times#(s(x),y) -> times#(x,y) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The set of usable rules consists of r4, r7, r9 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: times#_A(x1,x2) = max{9, x1 + 3, x2 + 1} s_A(x1) = max{6, x1 + 2} times_A(x1,x2) = max{8, x1 - 8, x2 - 2} |0|_A = 4 div_A(x1,x2) = max{7, x1 - 10, x2 - 10} quot_A(x1,x2,x3) = max{5, x1 - 7, x2 - 9, x3 - 7} base order 2: precedence: times > times# = div > s = quot > |0| partial status: pi(times#) = [1] pi(s) = [1] pi(times) = [] pi(|0|) = [] pi(div) = [] pi(quot) = [] 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: plus#(s(x),y) -> plus#(x,y) and R consists of: r1: plus(x,|0|()) -> x r2: plus(|0|(),y) -> y r3: plus(s(x),y) -> s(plus(x,y)) r4: times(|0|(),y) -> |0|() r5: times(s(|0|()),y) -> y r6: times(s(x),y) -> plus(y,times(x,y)) r7: div(|0|(),y) -> |0|() r8: div(x,y) -> quot(x,y,y) r9: quot(|0|(),s(y),z) -> |0|() r10: quot(s(x),s(y),z) -> quot(x,y,z) r11: quot(x,|0|(),s(z)) -> s(div(x,s(z))) r12: div(div(x,y),z) -> div(x,times(y,z)) The set of usable rules consists of r4, r7, r9 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: plus#_A(x1,x2) = max{7, x1 + 1, x2 + 1} s_A(x1) = max{6, x1 + 2} times_A(x1,x2) = max{9, x1 - 8, x2 - 2} |0|_A = 4 div_A(x1,x2) = max{8, x1 - 10, x2 - 10} quot_A(x1,x2,x3) = max{7, x1 - 11, x2 - 9, x3 - 7} base order 2: precedence: times > div > plus# = s = quot > |0| partial status: pi(plus#) = [1] pi(s) = [1] pi(times) = [] pi(|0|) = [] pi(div) = [] pi(quot) = [] The following rules are removed: p1 Then no dependency pair remains.