TSTP Solution File: SWC389-1 by SPASS---3.9

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : SPASS---3.9
% Problem  : SWC389-1 : TPTP v8.1.0. Released v2.4.0.
% Transfm  : none
% Format   : tptp
% Command  : run_spass %d %s

% Computer : n023.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 600s
% DateTime : Tue Jul 19 22:03:46 EDT 2022

% Result   : Unsatisfiable 86.74s 86.91s
% Output   : Refutation 121.36s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.11/0.11  % Problem  : SWC389-1 : TPTP v8.1.0. Released v2.4.0.
% 0.11/0.12  % Command  : run_spass %d %s
% 0.12/0.33  % Computer : n023.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % WCLimit  : 600
% 0.12/0.33  % DateTime : Sun Jun 12 06:38:36 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 86.74/86.91  
% 86.74/86.91  SPASS V 3.9 
% 86.74/86.91  SPASS beiseite: Proof found.
% 86.74/86.91  % SZS status Theorem
% 86.74/86.91  Problem: /export/starexec/sandbox2/benchmark/theBenchmark.p 
% 86.74/86.91  SPASS derived 57650 clauses, backtracked 25392 clauses, performed 117 splits and kept 39339 clauses.
% 86.74/86.91  SPASS allocated 137937 KBytes.
% 86.74/86.91  SPASS spent	0:1:26.48 on the problem.
% 86.74/86.91  		0:00:00.04 for the input.
% 86.74/86.91  		0:00:00.00 for the FLOTTER CNF translation.
% 86.74/86.91  		0:00:00.67 for inferences.
% 86.74/86.91  		0:00:04.02 for the backtracking.
% 86.74/86.91  		0:1:21.01 for the reduction.
% 86.74/86.91  
% 86.74/86.91  
% 86.74/86.91  Here is a proof with depth 4, length 182 :
% 86.74/86.91  % SZS output start Refutation
% 86.74/86.91  1[0:Inp] ||  -> ssList(sk1)*.
% 86.74/86.91  2[0:Inp] ||  -> ssList(sk2)*.
% 86.74/86.91  5[0:Inp] ||  -> equal(sk4,sk2)**.
% 86.74/86.91  6[0:Inp] ||  -> equal(sk3,sk1)**.
% 86.74/86.91  11[0:Inp] ||  -> equal(cons(sk5,nil),sk3)** equal(nil,sk4).
% 86.74/86.91  15[0:Inp] ||  -> ssList(sk6)* equal(nil,sk3).
% 86.74/86.91  16[0:Inp] ||  -> ssList(sk7)* equal(nil,sk3).
% 86.74/86.91  17[0:Inp] ||  -> equal(cons(sk5,nil),sk3)** equal(nil,sk3).
% 86.74/86.91  18[0:Inp] ||  -> equal(app(app(sk6,sk3),sk7),sk4)** equal(nil,sk3).
% 86.74/86.91  21[0:Inp] || segmentP(sk2,sk1) -> neq(sk2,nil)*.
% 86.74/86.91  22[0:Inp] || singletonP(sk1) segmentP(sk2,sk1)* -> .
% 86.74/86.91  23[0:Inp] ||  -> equalelemsP(nil)*.
% 86.74/86.91  24[0:Inp] ||  -> duplicatefreeP(nil)*.
% 86.74/86.91  25[0:Inp] ||  -> strictorderedP(nil)*.
% 86.74/86.91  26[0:Inp] ||  -> totalorderedP(nil)*.
% 86.74/86.91  27[0:Inp] ||  -> strictorderP(nil)*.
% 86.74/86.91  28[0:Inp] ||  -> totalorderP(nil)*.
% 86.74/86.91  29[0:Inp] ||  -> cyclefreeP(nil)*.
% 86.74/86.91  30[0:Inp] ||  -> ssList(nil)*.
% 86.74/86.91  35[0:Inp] ||  -> ssList(skaf82(u))*.
% 86.74/86.91  69[0:Inp] ||  -> ssItem(skaf44(u))*.
% 86.74/86.91  76[0:Inp] || equal(skac2,skac3)** -> .
% 86.74/86.91  78[0:Inp] ssList(u) ||  -> segmentP(u,nil)*.
% 86.74/86.91  86[0:Inp] ssItem(u) ||  -> equalelemsP(cons(u,nil))*.
% 86.74/86.91  87[0:Inp] ssItem(u) ||  -> duplicatefreeP(cons(u,nil))*.
% 86.74/86.91  88[0:Inp] ssItem(u) ||  -> strictorderedP(cons(u,nil))*.
% 86.74/86.91  89[0:Inp] ssItem(u) ||  -> totalorderedP(cons(u,nil))*.
% 86.74/86.91  90[0:Inp] ssItem(u) ||  -> strictorderP(cons(u,nil))*.
% 86.74/86.91  91[0:Inp] ssItem(u) ||  -> totalorderP(cons(u,nil))*.
% 86.74/86.91  92[0:Inp] ssItem(u) ||  -> cyclefreeP(cons(u,nil))*.
% 86.74/86.91  94[0:Inp] ssList(u) ||  -> ssItem(v)* duplicatefreeP(u)*.
% 86.74/86.91  95[0:Inp] ssList(u) ||  -> equal(app(u,nil),u)**.
% 86.74/86.91  96[0:Inp] ssList(u) ||  -> equal(app(nil,u),u)**.
% 86.74/86.91  107[0:Inp] ssList(u) ssList(v) ||  -> ssList(app(u,v))*.
% 86.74/86.91  108[0:Inp] ssList(u) ssItem(v) ||  -> ssList(cons(v,u))*.
% 86.74/86.91  109[0:Inp] ssList(u) ||  -> cyclefreeP(u) leq(skaf50(u),skaf49(u))*.
% 86.74/86.91  119[0:Inp] ssList(u) ssItem(v) ||  -> equal(hd(cons(v,u)),v)**.
% 86.74/86.91  121[0:Inp] ssList(u) ssItem(v) || equal(cons(v,u),u)** -> .
% 86.74/86.91  138[0:Inp] ssList(u) ssItem(v) || equal(cons(v,nil),u)*+ -> singletonP(u)*.
% 86.74/86.91  139[0:Inp] ssItem(u) ssItem(v) || neq(u,v)* equal(u,v) -> .
% 86.74/86.91  145[0:Inp] ssList(u) ssList(v) ||  -> equal(nil,u) equal(hd(app(u,v)),hd(u))**.
% 86.74/86.91  171[0:Inp] ssList(u) ssList(v) ssList(w) ||  -> equal(app(app(u,v),w),app(u,app(v,w)))**.
% 86.74/86.91  179[0:Inp] ssList(u) ssList(v) ssItem(w) ||  -> equal(app(cons(w,v),u),cons(w,app(v,u)))**.
% 86.74/86.91  185[0:Inp] ssList(u) ||  -> strictorderedP(u) equal(app(app(skaf71(u),cons(skaf69(u),skaf72(u))),cons(skaf70(u),skaf73(u))),u)**.
% 86.74/86.91  186[0:Inp] ssList(u) ||  -> totalorderedP(u) equal(app(app(skaf66(u),cons(skaf64(u),skaf67(u))),cons(skaf65(u),skaf68(u))),u)**.
% 86.74/86.91  187[0:Inp] ssList(u) ||  -> strictorderP(u) equal(app(app(skaf61(u),cons(skaf59(u),skaf62(u))),cons(skaf60(u),skaf63(u))),u)**.
% 86.74/86.91  188[0:Inp] ssList(u) ||  -> totalorderP(u) equal(app(app(skaf56(u),cons(skaf54(u),skaf57(u))),cons(skaf55(u),skaf58(u))),u)**.
% 86.74/86.91  192[0:Inp] ssList(u) ssList(v) ssItem(w) ssItem(x) || equal(cons(w,u),cons(x,v))* -> equal(w,x).
% 86.74/86.91  194[0:Inp] ssList(u) ssList(v) ssList(w) ssList(x) || segmentP(x,w) -> segmentP(app(app(v,x),u),w)*.
% 86.74/86.91  195[0:Inp] ssList(u) ssList(v) ssList(w) ssList(x) || equal(app(app(v,w),u),x)* -> segmentP(x,w)*.
% 86.74/86.91  199[0:Inp] ssList(u) ssList(v) || equal(hd(v),hd(u))* equal(tl(v),tl(u)) -> equal(v,u) equal(nil,v) equal(nil,u).
% 86.74/86.91  201[0:Inp] ssList(u) duplicatefreeP(u) ssItem(v) ssList(w) ssList(x) ssList(y) || equal(app(app(w,cons(v,x)),cons(v,y)),u)* -> .
% 86.74/86.91  210[0:Rew:6.0,16.1] ||  -> ssList(sk7)* equal(nil,sk1).
% 86.74/86.91  211[0:Rew:6.0,15.1] ||  -> ssList(sk6)* equal(nil,sk1).
% 86.74/86.91  216[0:Rew:6.0,17.1,6.0,17.0] ||  -> equal(nil,sk1) equal(cons(sk5,nil),sk1)**.
% 86.74/86.91  217[0:Rew:216.1,11.1,5.0,11.1,6.0,11.0] ||  -> equal(sk2,sk1) equal(cons(sk5,nil),sk1)**.
% 86.74/86.91  218[0:Rew:6.0,18.1,6.0,18.0,5.0,18.0] ||  -> equal(nil,sk1) equal(app(app(sk6,sk1),sk7),sk2)**.
% 86.74/86.91  226[0:Rew:171.3,194.5] ssList(u) ssList(v) ssList(w) ssList(x) || segmentP(u,v) -> segmentP(app(w,app(u,x)),v)*.
% 86.74/86.91  227[0:Rew:171.3,195.4] ssList(u) ssList(v) ssList(w) ssList(x) || equal(app(w,app(v,x)),u)*+ -> segmentP(u,v)*.
% 86.74/86.91  308[0:Res:2.0,96.0] ||  -> equal(app(nil,sk2),sk2)**.
% 86.74/86.91  310[0:Res:2.0,78.0] ||  -> segmentP(sk2,nil)*.
% 86.74/86.91  365[0:Res:2.0,108.1] ssItem(u) ||  -> ssList(cons(u,sk2))*.
% 86.74/86.91  415[0:Res:1.0,188.0] ||  -> totalorderP(sk1) equal(app(app(skaf56(sk1),cons(skaf54(sk1),skaf57(sk1))),cons(skaf55(sk1),skaf58(sk1))),sk1)**.
% 86.74/86.91  416[0:Res:1.0,187.0] ||  -> strictorderP(sk1) equal(app(app(skaf61(sk1),cons(skaf59(sk1),skaf62(sk1))),cons(skaf60(sk1),skaf63(sk1))),sk1)**.
% 86.74/86.91  417[0:Res:1.0,186.0] ||  -> totalorderedP(sk1) equal(app(app(skaf66(sk1),cons(skaf64(sk1),skaf67(sk1))),cons(skaf65(sk1),skaf68(sk1))),sk1)**.
% 86.74/86.91  418[0:Res:1.0,185.0] ||  -> strictorderedP(sk1) equal(app(app(skaf71(sk1),cons(skaf69(sk1),skaf72(sk1))),cons(skaf70(sk1),skaf73(sk1))),sk1)**.
% 86.74/86.91  473[0:Res:1.0,107.0] ssList(u) ||  -> ssList(app(u,sk1))*.
% 86.74/86.91  474[0:Res:1.0,109.0] ||  -> cyclefreeP(sk1) leq(skaf50(sk1),skaf49(sk1))*.
% 86.74/86.91  478[0:Res:1.0,95.0] ||  -> equal(app(sk1,nil),sk1)**.
% 86.74/86.91  495[0:Res:1.0,199.1] ssList(u) || equal(hd(u),hd(sk1))* equal(tl(u),tl(sk1)) -> equal(u,sk1) equal(nil,u) equal(nil,sk1).
% 86.74/86.91  524[0:Res:1.0,145.1] ssList(u) ||  -> equal(nil,sk1) equal(hd(app(sk1,u)),hd(sk1))**.
% 86.74/86.91  529[0:Res:1.0,138.1] ssItem(u) || equal(cons(u,nil),sk1)** -> singletonP(sk1).
% 86.74/86.91  531[0:Res:1.0,119.1] ssItem(u) ||  -> equal(hd(cons(u,sk1)),u)**.
% 86.74/86.91  533[0:Res:1.0,121.1] ssItem(u) || equal(cons(u,sk1),sk1)** -> .
% 86.74/86.91  536[0:Res:1.0,108.1] ssItem(u) ||  -> ssList(cons(u,sk1))*.
% 86.74/86.91  547[0:Res:1.0,179.2] ssList(u) ssItem(v) ||  -> equal(app(cons(v,u),sk1),cons(v,app(u,sk1)))**.
% 86.74/86.91  574[1:Spt:94.1] ||  -> ssItem(u)*.
% 86.74/86.91  577[1:MRR:536.0,574.0] ||  -> ssList(cons(u,sk1))*.
% 86.74/86.91  580[1:MRR:92.0,574.0] ||  -> cyclefreeP(cons(u,nil))*.
% 86.74/86.91  581[1:MRR:91.0,574.0] ||  -> totalorderP(cons(u,nil))*.
% 86.74/86.91  582[1:MRR:90.0,574.0] ||  -> strictorderP(cons(u,nil))*.
% 86.74/86.91  583[1:MRR:89.0,574.0] ||  -> totalorderedP(cons(u,nil))*.
% 86.74/86.91  584[1:MRR:88.0,574.0] ||  -> strictorderedP(cons(u,nil))*.
% 86.74/86.91  585[1:MRR:87.0,574.0] ||  -> duplicatefreeP(cons(u,nil))*.
% 86.74/86.91  586[1:MRR:86.0,574.0] ||  -> equalelemsP(cons(u,nil))*.
% 86.74/86.91  588[1:MRR:533.0,574.0] || equal(cons(u,sk1),sk1)** -> .
% 86.74/86.91  590[1:MRR:531.0,574.0] ||  -> equal(hd(cons(u,sk1)),u)**.
% 86.74/86.91  596[1:MRR:529.0,574.0] || equal(cons(u,nil),sk1)** -> singletonP(sk1).
% 86.74/86.91  614[1:MRR:139.1,139.0,574.0] || neq(u,v)* equal(u,v) -> .
% 86.74/86.91  710[1:MRR:547.1,574.0] ssList(u) ||  -> equal(app(cons(v,u),sk1),cons(v,app(u,sk1)))**.
% 86.74/86.91  773[1:MRR:192.3,192.2,574.0] ssList(u) ssList(v) || equal(cons(w,u),cons(x,v))* -> equal(w,x).
% 86.74/86.91  774[2:Spt:524.0,524.2] ssList(u) ||  -> equal(hd(app(sk1,u)),hd(sk1))**.
% 86.74/86.91  782[3:Spt:495.5] ||  -> equal(nil,sk1)**.
% 86.74/86.91  863[3:Rew:782.0,96.1] ssList(u) ||  -> equal(app(sk1,u),u)**.
% 86.74/86.91  864[3:Rew:782.0,95.1] ssList(u) ||  -> equal(app(u,sk1),u)**.
% 86.74/86.91  869[3:Rew:782.0,580.0] ||  -> cyclefreeP(cons(u,sk1))*.
% 86.74/86.91  870[3:Rew:782.0,581.0] ||  -> totalorderP(cons(u,sk1))*.
% 86.74/86.91  871[3:Rew:782.0,582.0] ||  -> strictorderP(cons(u,sk1))*.
% 86.74/86.91  872[3:Rew:782.0,583.0] ||  -> totalorderedP(cons(u,sk1))*.
% 86.74/86.91  873[3:Rew:782.0,584.0] ||  -> strictorderedP(cons(u,sk1))*.
% 86.74/86.91  874[3:Rew:782.0,585.0] ||  -> duplicatefreeP(cons(u,sk1))*.
% 86.74/86.91  875[3:Rew:782.0,586.0] ||  -> equalelemsP(cons(u,sk1))*.
% 86.74/86.91  1074[3:Rew:863.1,774.1] ssList(u) ||  -> equal(hd(u),hd(sk1))*.
% 86.74/86.91  1097[3:Rew:864.1,710.1] ssList(u) ||  -> equal(app(cons(v,u),sk1),cons(v,u))**.
% 86.74/86.91  1211[3:SpR:1074.1,590.0] ssList(cons(u,sk1)) ||  -> equal(hd(sk1),u)*.
% 86.74/86.91  1216[3:SSi:1211.0,577.0,869.0,870.0,871.0,872.0,873.0,874.0,875.0] ||  -> equal(hd(sk1),u)*.
% 86.74/86.91  1306[3:Rew:1216.0,1097.1] ssList(u) ||  -> equal(cons(v,u),hd(sk1))**.
% 86.74/86.91  1337[3:Rew:1216.0,773.2] ssList(u) ssList(v) || equal(cons(w,u),hd(sk1))** -> equal(w,x)*.
% 86.74/86.91  1415[3:Con:1337.1] ssList(u) || equal(cons(v,u),hd(sk1))** -> equal(v,w)*.
% 86.74/86.91  1416[3:AED:76.0,1415.2] ssList(u) || equal(cons(v,u),hd(sk1))** -> .
% 86.74/86.91  1417[3:Rew:1306.1,1416.1] ssList(u) || equal(hd(sk1),hd(sk1))* -> .
% 86.74/86.91  1418[3:Obv:1417.1] ssList(u) ||  -> .
% 86.74/86.91  1419[3:UnC:1418.0,35.0] ||  -> .
% 121.36/121.55  1517[3:Spt:1419.0,495.5,782.0] || equal(nil,sk1)** -> .
% 121.36/121.55  1518[3:Spt:1419.0,495.0,495.1,495.2,495.3,495.4] ssList(u) || equal(hd(u),hd(sk1))* equal(tl(u),tl(sk1)) -> equal(u,sk1) equal(nil,u).
% 121.36/121.55  1519[3:MRR:210.1,1517.0] ||  -> ssList(sk7)*.
% 121.36/121.55  1520[3:MRR:211.1,1517.0] ||  -> ssList(sk6)*.
% 121.36/121.55  1525[3:MRR:216.0,1517.0] ||  -> equal(cons(sk5,nil),sk1)**.
% 121.36/121.55  1528[3:MRR:218.0,1517.0] ||  -> equal(app(app(sk6,sk1),sk7),sk2)**.
% 121.36/121.55  2328[4:Spt:418.0] ||  -> strictorderedP(sk1)*.
% 121.36/121.55  2331[5:Spt:417.0] ||  -> totalorderedP(sk1)*.
% 121.36/121.55  2342[6:Spt:474.0] ||  -> cyclefreeP(sk1)*.
% 121.36/121.55  2346[7:Spt:22.0] || singletonP(sk1)* -> .
% 121.36/121.55  2347[7:MRR:596.1,2346.0] || equal(cons(u,nil),sk1)** -> .
% 121.36/121.55  2348[7:UnC:2347.0,1525.0] ||  -> .
% 121.36/121.55  2349[7:Spt:2348.0,22.0,2346.0] ||  -> singletonP(sk1)*.
% 121.36/121.55  2350[7:Spt:2348.0,22.1] || segmentP(sk2,sk1)* -> .
% 121.36/121.55  2352[8:Spt:416.0] ||  -> strictorderP(sk1)*.
% 121.36/121.55  2353[9:Spt:415.0] ||  -> totalorderP(sk1)*.
% 121.36/121.55  2356[3:SpR:1525.0,580.0] ||  -> cyclefreeP(sk1)*.
% 121.36/121.55  2357[3:SpR:1525.0,581.0] ||  -> totalorderP(sk1)*.
% 121.36/121.55  2358[3:SpR:1525.0,582.0] ||  -> strictorderP(sk1)*.
% 121.36/121.55  2359[3:SpR:1525.0,583.0] ||  -> totalorderedP(sk1)*.
% 121.36/121.55  2360[3:SpR:1525.0,584.0] ||  -> strictorderedP(sk1)*.
% 121.36/121.55  2361[3:SpR:1525.0,585.0] ||  -> duplicatefreeP(sk1)*.
% 121.36/121.55  2362[3:SpR:1525.0,586.0] ||  -> equalelemsP(sk1)*.
% 121.36/121.55  8394[0:EqR:227.4] ssList(app(u,app(v,w))) ssList(v) ssList(u) ssList(w) ||  -> segmentP(app(u,app(v,w)),v)*.
% 121.36/121.55  8437[0:SSi:8394.0,107.2,107.2] ssList(u) ssList(v) ssList(w) ||  -> segmentP(app(v,app(u,w)),u)*.
% 121.36/121.55  17996[3:SpR:1528.0,226.5] ssList(app(sk6,sk1)) ssList(u) ssList(v) ssList(sk7) || segmentP(app(sk6,sk1),u)* -> segmentP(app(v,sk2),u)*.
% 121.36/121.55  18024[3:SSi:17996.3,17996.0,1519.0,473.1,1520.0] ssList(u) ssList(v) || segmentP(app(sk6,sk1),u)*+ -> segmentP(app(v,sk2),u)*.
% 121.36/121.55  36175[0:SpR:478.0,8437.3] ssList(sk1) ssList(u) ssList(nil) ||  -> segmentP(app(u,sk1),sk1)*.
% 121.36/121.55  36198[9:SSi:36175.2,36175.0,30.0,29.0,28.0,27.0,26.0,25.0,24.0,23.0,1.0,2328.0,2331.0,2342.0,2352.0,2353.0,2349.0,2361.0,2362.0] ssList(u) ||  -> segmentP(app(u,sk1),sk1)*.
% 121.36/121.55  41783[9:Res:36198.1,18024.2] ssList(sk6) ssList(sk1) ssList(u) ||  -> segmentP(app(u,sk2),sk1)*.
% 121.36/121.55  45077[9:SSi:41783.1,41783.0,1.0,2328.0,2331.0,2342.0,2352.0,2353.0,2349.0,2361.0,2362.0,1520.0] ssList(u) ||  -> segmentP(app(u,sk2),sk1)*.
% 121.36/121.55  48981[9:SpR:308.0,45077.1] ssList(nil) ||  -> segmentP(sk2,sk1)*.
% 121.36/121.55  48988[9:SSi:48981.0,23.0,24.0,25.0,26.0,27.0,28.0,29.0,30.0] ||  -> segmentP(sk2,sk1)*.
% 121.36/121.55  48989[9:MRR:48988.0,2350.0] ||  -> .
% 121.36/121.55  49004[9:Spt:48989.0,415.0,2353.0] || totalorderP(sk1)* -> .
% 121.36/121.55  49005[9:Spt:48989.0,415.1] ||  -> equal(app(app(skaf56(sk1),cons(skaf54(sk1),skaf57(sk1))),cons(skaf55(sk1),skaf58(sk1))),sk1)**.
% 121.36/121.55  49006[9:MRR:49004.0,2357.0] ||  -> .
% 121.36/121.55  50085[8:Spt:49006.0,416.0,2352.0] || strictorderP(sk1)* -> .
% 121.36/121.55  50086[8:Spt:49006.0,416.1] ||  -> equal(app(app(skaf61(sk1),cons(skaf59(sk1),skaf62(sk1))),cons(skaf60(sk1),skaf63(sk1))),sk1)**.
% 121.36/121.55  50087[8:MRR:50085.0,2358.0] ||  -> .
% 121.36/121.55  50346[6:Spt:50087.0,474.0,2342.0] || cyclefreeP(sk1)* -> .
% 121.36/121.55  50347[6:Spt:50087.0,474.1] ||  -> leq(skaf50(sk1),skaf49(sk1))*.
% 121.36/121.55  50348[6:MRR:50346.0,2356.0] ||  -> .
% 121.36/121.55  51155[5:Spt:50348.0,417.0,2331.0] || totalorderedP(sk1)* -> .
% 121.36/121.55  51156[5:Spt:50348.0,417.1] ||  -> equal(app(app(skaf66(sk1),cons(skaf64(sk1),skaf67(sk1))),cons(skaf65(sk1),skaf68(sk1))),sk1)**.
% 121.36/121.55  51157[5:MRR:51155.0,2359.0] ||  -> .
% 121.36/121.55  51941[4:Spt:51157.0,418.0,2328.0] || strictorderedP(sk1)* -> .
% 121.36/121.55  51942[4:Spt:51157.0,418.1] ||  -> equal(app(app(skaf71(sk1),cons(skaf69(sk1),skaf72(sk1))),cons(skaf70(sk1),skaf73(sk1))),sk1)**.
% 121.36/121.55  51943[4:MRR:51941.0,2360.0] ||  -> .
% 121.36/121.55  52197[2:Spt:51943.0,524.1] ||  -> equal(nil,sk1)**.
% 121.36/121.55  52209[2:Rew:52197.0,310.0] ||  -> segmentP(sk2,sk1)*.
% 121.36/121.55  52938[2:Rew:52197.0,21.1] || segmentP(sk2,sk1) -> neq(sk2,sk1)*.
% 121.36/121.55  52939[2:MRR:52938.0,52209.0] ||  -> neq(sk2,sk1)*.
% 121.36/121.55  52943[2:Rew:52197.0,217.1] ||  -> equal(sk2,sk1) equal(cons(sk5,sk1),sk1)**.
% 121.36/121.55  52944[2:MRR:52943.1,588.0] ||  -> equal(sk2,sk1)**.
% 121.36/121.55  53559[2:Rew:52944.0,52939.0] ||  -> neq(sk1,sk1)*.
% 121.36/121.55  55209[2:Res:53559.0,614.0] || equal(sk1,sk1)* -> .
% 121.36/121.55  55210[2:Obv:55209.0] ||  -> .
% 121.36/121.55  55211[1:Spt:55210.0,94.0,94.2] ssList(u) ||  -> duplicatefreeP(u)*.
% 121.36/121.55  55367[1:MRR:201.1,55211.1] ssList(u) ssItem(v) ssList(w) ssList(x) ssList(y) || equal(app(app(w,cons(v,x)),cons(v,y)),u)* -> .
% 121.36/121.55  88998[0:SpR:179.3,107.2] ssList(u) ssList(v) ssItem(w) ssList(cons(w,v)) ssList(u) ||  -> ssList(cons(w,app(v,u)))*.
% 121.36/121.55  89049[0:Obv:88998.0] ssList(u) ssItem(v) ssList(cons(v,u)) ssList(w) ||  -> ssList(cons(v,app(u,w)))*.
% 121.36/121.55  89050[0:SSi:89049.2,108.2] ssList(u) ssItem(v) ssList(w) ||  -> ssList(cons(v,app(u,w)))*.
% 121.36/121.55  89994[1:EqR:55367.5] ssList(app(app(u,cons(v,w)),cons(v,x))) ssItem(v) ssList(u) ssList(w) ssList(x) ||  -> .
% 121.36/121.55  90025[1:SSi:89994.0,107.2,107.2,108.2,108.2] ssItem(u) ssList(v) ssList(w) ssList(x) ||  -> .
% 121.36/121.55  90026[1:MRR:89050.3,90025.1] ssList(u) ssItem(v) ssList(w) ||  -> .
% 121.36/121.55  90029[1:Con:90026.2] ssList(u) ssItem(v) ||  -> .
% 121.36/121.55  90031[1:MRR:365.1,90029.0] ssItem(u) ||  -> .
% 121.36/121.55  90033[1:UnC:90031.0,69.0] ||  -> .
% 121.36/121.55  % SZS output end Refutation
% 121.36/121.55  Formulae used in the proof : co1_1 co1_2 co1_5 co1_6 co1_11 co1_15 co1_16 co1_17 co1_18 co1_21 co1_22 clause1 clause2 clause3 clause4 clause5 clause6 clause7 clause8 clause13 clause47 clause54 clause56 clause64 clause65 clause66 clause67 clause68 clause69 clause70 clause72 clause73 clause74 clause85 clause86 clause87 clause97 clause99 clause116 clause117 clause123 clause149 clause157 clause163 clause164 clause165 clause166 clause170 clause172 clause173 clause177 clause179
% 121.36/121.55  
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