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SPASS---3.9.UNS-Ref.s

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%------------------------------------------------------------------------------
% File     : SPASS---3.9
% Problem  : GRP309-1 : TPTP v8.1.0. Released v2.5.0.
% Transfm  : none
% Format   : tptp
% Command  : run_spass %d %s

% Computer : n015.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 : Sat Jul 16 11:46:47 EDT 2022

% Result   : Unsatisfiable 0.18s 0.46s
% Output   : Refutation 0.18s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.11  % Problem  : GRP309-1 : TPTP v8.1.0. Released v2.5.0.
% 0.00/0.12  % Command  : run_spass %d %s
% 0.12/0.33  % Computer : n015.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 : Mon Jun 13 19:32:53 EDT 2022
% 0.12/0.33  % CPUTime  : 
% 0.18/0.46  
% 0.18/0.46  SPASS V 3.9 
% 0.18/0.46  SPASS beiseite: Proof found.
% 0.18/0.46  % SZS status Theorem
% 0.18/0.46  Problem: /export/starexec/sandbox/benchmark/theBenchmark.p 
% 0.18/0.46  SPASS derived 766 clauses, backtracked 327 clauses, performed 10 splits and kept 590 clauses.
% 0.18/0.46  SPASS allocated 63593 KBytes.
% 0.18/0.46  SPASS spent	0:00:00.12 on the problem.
% 0.18/0.46  		0:00:00.03 for the input.
% 0.18/0.46  		0:00:00.00 for the FLOTTER CNF translation.
% 0.18/0.46  		0:00:00.00 for inferences.
% 0.18/0.46  		0:00:00.00 for the backtracking.
% 0.18/0.46  		0:00:00.05 for the reduction.
% 0.18/0.46  
% 0.18/0.46  
% 0.18/0.46  Here is a proof with depth 5, length 305 :
% 0.18/0.46  % SZS output start Refutation
% 0.18/0.46  1[0:Inp] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)** equal(multiply(sk_c7,sk_c6),sk_c5).
% 0.18/0.46  2[0:Inp] ||  -> equal(inverse(sk_c3),sk_c7) equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  3[0:Inp] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)** equal(multiply(sk_c7,sk_c6),sk_c5).
% 0.18/0.46  4[0:Inp] ||  -> equal(inverse(sk_c4),sk_c6) equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  5[0:Inp] ||  -> equal(inverse(sk_c7),sk_c5) equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  6[0:Inp] ||  -> equal(inverse(sk_c3),sk_c7)** equal(inverse(sk_c7),sk_c5).
% 0.18/0.46  7[0:Inp] ||  -> equal(inverse(sk_c7),sk_c5) equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  8[0:Inp] ||  -> equal(inverse(sk_c4),sk_c6)** equal(inverse(sk_c7),sk_c5).
% 0.18/0.46  9[0:Inp] ||  -> equal(multiply(sk_c5,sk_c6),sk_c7)**.
% 0.18/0.46  10[0:Inp] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)** equal(multiply(sk_c7,sk_c2),sk_c6).
% 0.18/0.46  11[0:Inp] ||  -> equal(inverse(sk_c3),sk_c7) equal(multiply(sk_c7,sk_c2),sk_c6)**.
% 0.18/0.46  12[0:Inp] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)** equal(multiply(sk_c7,sk_c2),sk_c6).
% 0.18/0.46  13[0:Inp] ||  -> equal(inverse(sk_c4),sk_c6) equal(multiply(sk_c7,sk_c2),sk_c6)**.
% 0.18/0.46  14[0:Inp] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6) equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  15[0:Inp] ||  -> equal(inverse(sk_c3),sk_c7) equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  16[0:Inp] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5) equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  17[0:Inp] ||  -> equal(inverse(sk_c4),sk_c6) equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  18[0:Inp] ||  -> equal(inverse(sk_c1),sk_c7) equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  19[0:Inp] ||  -> equal(inverse(sk_c3),sk_c7) equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  20[0:Inp] ||  -> equal(inverse(sk_c1),sk_c7) equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  21[0:Inp] ||  -> equal(inverse(sk_c4),sk_c6) equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  22[0:Inp] || equal(multiply(sk_c7,sk_c6),sk_c5) equal(inverse(sk_c7),sk_c5) equal(multiply(sk_c5,sk_c6),sk_c7)** equal(multiply(sk_c7,u),sk_c6)** equal(multiply(v,sk_c7),u)* equal(inverse(v),sk_c7) equal(multiply(w,sk_c7),sk_c6)** equal(inverse(w),sk_c7) equal(multiply(x,sk_c6),sk_c5)** equal(inverse(x),sk_c6) -> .
% 0.18/0.46  23[0:Inp] ||  -> equal(multiply(identity,u),u)**.
% 0.18/0.46  24[0:Inp] ||  -> equal(multiply(inverse(u),u),identity)**.
% 0.18/0.46  25[0:Inp] ||  -> equal(multiply(multiply(u,v),w),multiply(u,multiply(v,w)))**.
% 0.18/0.46  26[0:Rew:9.0,22.2] || equal(multiply(sk_c7,sk_c6),sk_c5)** equal(inverse(sk_c7),sk_c5) equal(sk_c7,sk_c7) equal(multiply(sk_c7,u),sk_c6)** equal(multiply(v,sk_c7),u)* equal(inverse(v),sk_c7) equal(multiply(w,sk_c7),sk_c6)** equal(inverse(w),sk_c7) equal(multiply(x,sk_c6),sk_c5)** equal(inverse(x),sk_c6) -> .
% 0.18/0.46  27[0:Obv:26.2] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(inverse(w),sk_c7) equal(inverse(sk_c7),sk_c5) equal(multiply(w,sk_c7),x)*+ equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** equal(multiply(sk_c7,x),sk_c6)** equal(multiply(sk_c7,sk_c6),sk_c5)** -> .
% 0.18/0.46  28[1:Spt:27.2,27.4,27.7] || equal(inverse(u),sk_c7) equal(multiply(u,sk_c7),v)*+ equal(multiply(sk_c7,v),sk_c6)** -> .
% 0.18/0.46  30[2:Spt:8.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  32[3:Spt:6.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  35[4:Spt:7.1] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  37[5:Spt:5.1] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  43[1:SpL:23.0,28.1] || equal(inverse(identity),sk_c7) equal(sk_c7,u) equal(multiply(sk_c7,u),sk_c6)** -> .
% 0.18/0.46  45[2:SpR:30.0,24.0] ||  -> equal(multiply(sk_c6,sk_c4),identity)**.
% 0.18/0.46  46[3:SpR:32.0,24.0] ||  -> equal(multiply(sk_c7,sk_c3),identity)**.
% 0.18/0.46  47[1:SpL:24.0,28.1] || equal(inverse(inverse(sk_c7)),sk_c7) equal(identity,u) equal(multiply(sk_c7,u),sk_c6)** -> .
% 0.18/0.46  52[0:SpR:9.0,25.0] ||  -> equal(multiply(sk_c5,multiply(sk_c6,u)),multiply(sk_c7,u))**.
% 0.18/0.46  55[0:SpR:24.0,25.0] ||  -> equal(multiply(inverse(u),multiply(u,v)),multiply(identity,v))**.
% 0.18/0.46  56[2:SpR:45.0,25.0] ||  -> equal(multiply(sk_c6,multiply(sk_c4,u)),multiply(identity,u))**.
% 0.18/0.46  58[2:Rew:23.0,56.0] ||  -> equal(multiply(sk_c6,multiply(sk_c4,u)),u)**.
% 0.18/0.46  59[0:Rew:23.0,55.0] ||  -> equal(multiply(inverse(u),multiply(u,v)),v)**.
% 0.18/0.46  66[4:SpR:35.0,58.0] ||  -> equal(multiply(sk_c6,sk_c5),sk_c6)**.
% 0.18/0.46  75[0:SpR:59.0,59.0] ||  -> equal(multiply(inverse(inverse(u)),v),multiply(u,v))**.
% 0.18/0.46  78[3:SpR:46.0,59.0] ||  -> equal(multiply(inverse(sk_c7),identity),sk_c3)**.
% 0.18/0.46  80[0:SpR:9.0,59.0] ||  -> equal(multiply(inverse(sk_c5),sk_c7),sk_c6)**.
% 0.18/0.46  83[0:SpR:24.0,59.0] ||  -> equal(multiply(inverse(inverse(u)),identity),u)**.
% 0.18/0.46  84[2:SpR:45.0,59.0] ||  -> equal(multiply(inverse(sk_c6),identity),sk_c4)**.
% 0.18/0.46  86[4:SpR:66.0,59.0] ||  -> equal(multiply(inverse(sk_c6),sk_c6),sk_c5)**.
% 0.18/0.46  92[4:Rew:24.0,86.0] ||  -> equal(identity,sk_c5)**.
% 0.18/0.46  93[4:Rew:92.0,23.0] ||  -> equal(multiply(sk_c5,u),u)**.
% 0.18/0.46  96[4:Rew:92.0,46.0] ||  -> equal(multiply(sk_c7,sk_c3),sk_c5)**.
% 0.18/0.46  99[4:Rew:92.0,47.1] || equal(inverse(inverse(sk_c7)),sk_c7) equal(sk_c5,u) equal(multiply(sk_c7,u),sk_c6)** -> .
% 0.18/0.46  100[4:Rew:92.0,78.0] ||  -> equal(multiply(inverse(sk_c7),sk_c5),sk_c3)**.
% 0.18/0.46  101[4:Rew:92.0,84.0] ||  -> equal(multiply(inverse(sk_c6),sk_c5),sk_c4)**.
% 0.18/0.46  102[4:Rew:93.0,9.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  108[4:Rew:102.0,35.0] ||  -> equal(multiply(sk_c4,sk_c7),sk_c5)**.
% 0.18/0.46  109[5:Rew:102.0,37.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c7)**.
% 0.18/0.46  119[4:Rew:100.0,101.0,102.0,101.0] ||  -> equal(sk_c4,sk_c3)**.
% 0.18/0.46  122[4:Rew:119.0,108.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c5)**.
% 0.18/0.46  123[5:Rew:109.0,122.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  125[5:Rew:123.0,93.0] ||  -> equal(multiply(sk_c7,u),u)**.
% 0.18/0.46  126[5:Rew:123.0,96.0] ||  -> equal(multiply(sk_c7,sk_c3),sk_c7)**.
% 0.18/0.46  132[5:Rew:125.0,126.0] ||  -> equal(sk_c3,sk_c7)**.
% 0.18/0.46  133[5:Rew:132.0,32.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  158[5:Rew:125.0,99.2,102.0,99.2,123.0,99.1,133.0,99.0,133.0,99.0] || equal(sk_c7,sk_c7)* equal(sk_c7,u)* equal(u,sk_c7)* -> .
% 0.18/0.46  159[5:Obv:158.1] || equal(u,sk_c7)* -> .
% 0.18/0.46  160[5:UnC:159.0,59.0] ||  -> .
% 0.18/0.46  163[5:Spt:160.0,5.1,37.0] || equal(multiply(sk_c3,sk_c7),sk_c6)** -> .
% 0.18/0.46  164[5:Spt:160.0,5.0] ||  -> equal(inverse(sk_c7),sk_c5)**.
% 0.18/0.46  165[5:Rew:93.0,100.0,164.0,100.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  168[5:Rew:165.0,122.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c5)**.
% 0.18/0.46  170[5:Rew:93.0,168.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  172[5:Rew:170.0,164.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  174[5:Rew:170.0,93.0] ||  -> equal(multiply(sk_c7,u),u)**.
% 0.18/0.46  201[5:Rew:174.0,99.2,102.0,99.2,170.0,99.1,172.0,99.0,172.0,99.0] || equal(sk_c7,sk_c7)* equal(sk_c7,u)* equal(u,sk_c7)* -> .
% 0.18/0.46  202[5:Obv:201.1] || equal(u,sk_c7)* -> .
% 0.18/0.46  203[5:UnC:202.0,59.0] ||  -> .
% 0.18/0.46  206[4:Spt:203.0,7.1,35.0] || equal(multiply(sk_c4,sk_c6),sk_c5)** -> .
% 0.18/0.46  207[4:Spt:203.0,7.0] ||  -> equal(inverse(sk_c7),sk_c5)**.
% 0.18/0.46  208[4:Rew:207.0,78.0] ||  -> equal(multiply(sk_c5,identity),sk_c3)**.
% 0.18/0.46  209[0:Rew:75.0,83.0] ||  -> equal(multiply(u,identity),u)**.
% 0.18/0.46  210[4:Rew:209.0,208.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  211[2:Rew:209.0,84.0] ||  -> equal(inverse(sk_c6),sk_c4)**.
% 0.18/0.46  212[4:Rew:210.0,32.0] ||  -> equal(inverse(sk_c5),sk_c7)**.
% 0.18/0.46  213[4:Rew:210.0,46.0] ||  -> equal(multiply(sk_c7,sk_c5),identity)**.
% 0.18/0.46  215[4:Rew:212.0,80.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c6)**.
% 0.18/0.46  220[4:MRR:20.1,206.0] ||  -> equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  224[4:MRR:16.0,206.0] ||  -> equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  225[4:MRR:12.0,206.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c6)**.
% 0.18/0.46  226[4:MRR:3.0,206.0] ||  -> equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  259[4:SpR:224.0,59.0] ||  -> equal(multiply(inverse(sk_c1),sk_c2),sk_c7)**.
% 0.18/0.46  261[4:Rew:220.0,259.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c7)**.
% 0.18/0.46  262[4:Rew:225.0,261.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  267[4:Rew:262.0,215.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c7)**.
% 0.18/0.46  274[4:Rew:262.0,226.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c5)**.
% 0.18/0.46  277[4:Rew:262.0,43.2] || equal(inverse(identity),sk_c7) equal(sk_c7,u) equal(multiply(sk_c7,u),sk_c7)** -> .
% 0.18/0.46  283[4:Rew:267.0,274.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  284[4:Rew:283.0,207.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  287[4:Rew:283.0,213.0] ||  -> equal(multiply(sk_c7,sk_c7),identity)**.
% 0.18/0.46  292[4:Rew:267.0,287.0] ||  -> equal(identity,sk_c7)**.
% 0.18/0.46  293[4:Rew:292.0,23.0] ||  -> equal(multiply(sk_c7,u),u)**.
% 0.18/0.46  313[4:Rew:293.0,277.2,284.0,277.0,292.0,277.0] || equal(sk_c7,sk_c7)* equal(sk_c7,u)* equal(u,sk_c7)* -> .
% 0.18/0.46  314[4:Obv:313.1] || equal(u,sk_c7)* -> .
% 0.18/0.46  315[4:UnC:314.0,220.0] ||  -> .
% 0.18/0.46  318[3:Spt:315.0,6.0,32.0] || equal(inverse(sk_c3),sk_c7)** -> .
% 0.18/0.46  319[3:Spt:315.0,6.1] ||  -> equal(inverse(sk_c7),sk_c5)**.
% 0.18/0.46  320[3:MRR:19.0,318.0] ||  -> equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  321[3:MRR:15.0,318.0] ||  -> equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  322[3:MRR:11.0,318.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c6)**.
% 0.18/0.46  323[3:MRR:2.0,318.0] ||  -> equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  342[3:SpR:321.0,59.0] ||  -> equal(multiply(inverse(sk_c1),sk_c2),sk_c7)**.
% 0.18/0.46  344[3:Rew:320.0,342.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c7)**.
% 0.18/0.46  345[3:Rew:322.0,344.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  346[3:Rew:345.0,211.0] ||  -> equal(inverse(sk_c7),sk_c4)**.
% 0.18/0.46  347[3:Rew:345.0,30.0] ||  -> equal(inverse(sk_c4),sk_c7)**.
% 0.18/0.46  348[3:Rew:345.0,9.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c7)**.
% 0.18/0.46  349[3:Rew:345.0,45.0] ||  -> equal(multiply(sk_c7,sk_c4),identity)**.
% 0.18/0.46  350[3:Rew:345.0,80.0] ||  -> equal(multiply(inverse(sk_c5),sk_c7),sk_c7)**.
% 0.18/0.46  355[3:Rew:345.0,323.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c5)**.
% 0.18/0.46  358[3:Rew:345.0,43.2] || equal(inverse(identity),sk_c7) equal(sk_c7,u) equal(multiply(sk_c7,u),sk_c7)** -> .
% 0.18/0.46  361[3:Rew:319.0,346.0] ||  -> equal(sk_c4,sk_c5)**.
% 0.18/0.46  362[3:Rew:361.0,347.0] ||  -> equal(inverse(sk_c5),sk_c7)**.
% 0.18/0.46  363[3:Rew:361.0,349.0] ||  -> equal(multiply(sk_c7,sk_c5),identity)**.
% 0.18/0.46  364[3:Rew:355.0,350.0,362.0,350.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  365[3:Rew:364.0,319.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  369[3:Rew:364.0,348.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c7)**.
% 0.18/0.46  370[3:Rew:364.0,363.0] ||  -> equal(multiply(sk_c7,sk_c7),identity)**.
% 0.18/0.46  372[3:Rew:369.0,370.0] ||  -> equal(identity,sk_c7)**.
% 0.18/0.46  374[3:Rew:372.0,23.0] ||  -> equal(multiply(sk_c7,u),u)**.
% 0.18/0.46  394[3:Rew:374.0,358.2,365.0,358.0,372.0,358.0] || equal(sk_c7,sk_c7)* equal(sk_c7,u)* equal(u,sk_c7)* -> .
% 0.18/0.46  395[3:Obv:394.1] || equal(u,sk_c7)* -> .
% 0.18/0.46  396[3:UnC:395.0,59.0] ||  -> .
% 0.18/0.46  399[2:Spt:396.0,8.0,30.0] || equal(inverse(sk_c4),sk_c6)** -> .
% 0.18/0.46  400[2:Spt:396.0,8.1] ||  -> equal(inverse(sk_c7),sk_c5)**.
% 0.18/0.46  401[2:MRR:21.0,399.0] ||  -> equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  402[2:MRR:17.0,399.0] ||  -> equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  403[2:MRR:13.0,399.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c6)**.
% 0.18/0.46  404[2:MRR:4.0,399.0] ||  -> equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  405[2:Rew:400.0,47.0] || equal(inverse(sk_c5),sk_c7) equal(identity,u) equal(multiply(sk_c7,u),sk_c6)** -> .
% 0.18/0.46  406[2:SpR:400.0,59.0] ||  -> equal(multiply(sk_c5,multiply(sk_c7,u)),u)**.
% 0.18/0.46  414[2:SpR:402.0,59.0] ||  -> equal(multiply(inverse(sk_c1),sk_c2),sk_c7)**.
% 0.18/0.46  416[2:Rew:401.0,414.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c7)**.
% 0.18/0.46  417[2:Rew:403.0,416.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  421[2:Rew:417.0,52.0] ||  -> equal(multiply(sk_c5,multiply(sk_c7,u)),multiply(sk_c7,u))**.
% 0.18/0.46  422[2:Rew:417.0,403.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c7)**.
% 0.18/0.46  423[2:Rew:417.0,404.0] ||  -> equal(multiply(sk_c7,sk_c7),sk_c5)**.
% 0.18/0.46  425[2:Rew:417.0,405.2] || equal(inverse(sk_c5),sk_c7) equal(identity,u) equal(multiply(sk_c7,u),sk_c7)** -> .
% 0.18/0.46  429[2:Rew:406.0,421.0] ||  -> equal(multiply(sk_c7,u),u)**.
% 0.18/0.46  430[2:Rew:429.0,423.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  431[2:Rew:429.0,422.0] ||  -> equal(sk_c2,sk_c7)**.
% 0.18/0.46  435[2:Rew:430.0,400.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  443[2:Rew:429.0,425.2,435.0,425.0,430.0,425.0] || equal(sk_c7,sk_c7) equal(identity,u)* equal(u,sk_c7) -> .
% 0.18/0.46  444[2:Obv:443.0] || equal(identity,u)* equal(u,sk_c7) -> .
% 0.18/0.46  467[0:SpR:24.0,59.0] ||  -> equal(multiply(inverse(inverse(u)),identity),u)**.
% 0.18/0.46  468[0:SpR:24.0,209.0] ||  -> equal(inverse(identity),identity)**.
% 0.18/0.46  470[2:SpR:401.0,24.0] ||  -> equal(multiply(sk_c7,sk_c1),identity)**.
% 0.18/0.46  474[2:Rew:429.0,470.0] ||  -> equal(identity,sk_c1)**.
% 0.18/0.46  478[2:Rew:474.0,444.0] || equal(sk_c1,u)* equal(u,sk_c7) -> .
% 0.18/0.46  479[2:Rew:474.0,468.0] ||  -> equal(inverse(sk_c1),sk_c1)**.
% 0.18/0.46  481[2:Rew:401.0,479.0] ||  -> equal(sk_c1,sk_c7)**.
% 0.18/0.46  497[2:Rew:481.0,478.0] || equal(sk_c7,u)* equal(u,sk_c7)* -> .
% 0.18/0.46  498[2:Obv:497.0] || equal(u,sk_c7)* -> .
% 0.18/0.46  499[2:UnC:498.0,431.0] ||  -> .
% 0.18/0.46  502[1:Spt:499.0,27.0,27.1,27.3,27.5,27.6,27.8] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(inverse(sk_c7),sk_c5) equal(multiply(u,sk_c6),sk_c5)**+ equal(multiply(v,sk_c7),sk_c6)** equal(multiply(sk_c7,sk_c6),sk_c5)** -> .
% 0.18/0.46  503[0:Rew:209.0,467.0] ||  -> equal(inverse(inverse(u)),u)**.
% 0.18/0.46  507[2:Spt:6.1] ||  -> equal(inverse(sk_c7),sk_c5)**.
% 0.18/0.46  508[2:Rew:507.0,502.2] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(sk_c5,sk_c5) equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** equal(multiply(sk_c7,sk_c6),sk_c5)** -> .
% 0.18/0.46  510[2:Obv:508.2] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** equal(multiply(sk_c7,sk_c6),sk_c5)** -> .
% 0.18/0.46  514[3:Spt:4.1] ||  -> equal(multiply(sk_c7,sk_c6),sk_c5)**.
% 0.18/0.46  516[3:Rew:514.0,510.4] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** equal(sk_c5,sk_c5) -> .
% 0.18/0.46  517[3:Obv:516.4] || equal(inverse(u),sk_c6) equal(inverse(v),sk_c7) equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** -> .
% 0.18/0.46  523[4:Spt:21.1] ||  -> equal(inverse(sk_c1),sk_c7)**.
% 0.18/0.46  529[5:Spt:17.1] ||  -> equal(multiply(sk_c1,sk_c7),sk_c2)**.
% 0.18/0.46  531[5:SpR:529.0,59.0] ||  -> equal(multiply(inverse(sk_c1),sk_c2),sk_c7)**.
% 0.18/0.46  533[5:Rew:523.0,531.0] ||  -> equal(multiply(sk_c7,sk_c2),sk_c7)**.
% 0.18/0.46  534[5:Rew:533.0,12.1] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)** equal(sk_c6,sk_c7).
% 0.18/0.46  535[5:Rew:533.0,10.1] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)** equal(sk_c6,sk_c7).
% 0.18/0.46  536[5:Rew:533.0,11.1] ||  -> equal(inverse(sk_c3),sk_c7)** equal(sk_c6,sk_c7).
% 0.18/0.46  537[5:Rew:533.0,13.1] ||  -> equal(inverse(sk_c4),sk_c6)** equal(sk_c6,sk_c7).
% 0.18/0.46  545[5:SpR:533.0,59.0] ||  -> equal(multiply(inverse(sk_c7),sk_c7),sk_c2)**.
% 0.18/0.46  547[5:Rew:507.0,545.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c2)**.
% 0.18/0.46  565[0:SpR:503.0,59.0] ||  -> equal(multiply(u,multiply(inverse(u),v)),v)**.
% 0.18/0.46  568[2:SpR:507.0,503.0] ||  -> equal(inverse(sk_c5),sk_c7)**.
% 0.18/0.46  569[4:SpR:523.0,503.0] ||  -> equal(inverse(sk_c7),sk_c1)**.
% 0.18/0.46  574[4:Rew:507.0,569.0] ||  -> equal(sk_c1,sk_c5)**.
% 0.18/0.46  584[2:SpR:507.0,24.0] ||  -> equal(multiply(sk_c5,sk_c7),identity)**.
% 0.18/0.46  587[5:Rew:547.0,584.0] ||  -> equal(identity,sk_c2)**.
% 0.18/0.46  588[5:Rew:587.0,468.0] ||  -> equal(inverse(sk_c2),sk_c2)**.
% 0.18/0.46  590[5:Rew:587.0,209.0] ||  -> equal(multiply(u,sk_c2),u)**.
% 0.18/0.46  646[6:Spt:536.1] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  648[6:Rew:646.0,9.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c7)**.
% 0.18/0.46  655[6:Rew:646.0,517.0] || equal(inverse(u),sk_c7) equal(inverse(v),sk_c7) equal(multiply(u,sk_c6),sk_c5)** equal(multiply(v,sk_c7),sk_c6)** -> .
% 0.18/0.46  657[6:Rew:547.0,648.0] ||  -> equal(sk_c2,sk_c7)**.
% 0.18/0.46  660[6:Rew:657.0,588.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  664[6:Rew:657.0,590.0] ||  -> equal(multiply(u,sk_c7),u)**.
% 0.18/0.46  667[6:Rew:507.0,660.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  668[6:Rew:667.0,507.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  682[6:Rew:664.0,655.3,646.0,655.3,664.0,655.2,646.0,655.2,667.0,655.2] || equal(inverse(u),sk_c7)** equal(inverse(v),sk_c7)** equal(u,sk_c7) equal(v,sk_c7) -> .
% 0.18/0.46  683[6:Con:682.1] || equal(inverse(u),sk_c7)** equal(u,sk_c7) -> .
% 0.18/0.46  723[6:SpL:668.0,683.0] || equal(sk_c7,sk_c7)* equal(sk_c7,sk_c7)* -> .
% 0.18/0.46  724[6:Obv:723.1] ||  -> .
% 0.18/0.46  725[6:Spt:724.0,536.1,646.0] || equal(sk_c6,sk_c7)** -> .
% 0.18/0.46  726[6:Spt:724.0,536.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  727[6:MRR:537.1,725.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  728[6:MRR:534.1,725.0] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  729[6:MRR:535.1,725.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  731[6:SpR:726.0,503.0] ||  -> equal(inverse(sk_c7),sk_c3)**.
% 0.18/0.46  733[6:Rew:507.0,731.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  735[6:Rew:733.0,729.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c6)**.
% 0.18/0.46  736[6:Rew:547.0,735.0] ||  -> equal(sk_c2,sk_c6)**.
% 0.18/0.46  739[6:Rew:736.0,590.0] ||  -> equal(multiply(u,sk_c6),u)**.
% 0.18/0.46  746[6:Rew:739.0,728.0] ||  -> equal(sk_c4,sk_c5)**.
% 0.18/0.46  747[6:Rew:739.0,9.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  751[6:Rew:746.0,727.0] ||  -> equal(inverse(sk_c5),sk_c6)**.
% 0.18/0.46  754[6:Rew:747.0,507.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  763[6:Rew:747.0,751.0] ||  -> equal(inverse(sk_c7),sk_c6)**.
% 0.18/0.46  766[6:Rew:763.0,754.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  767[6:MRR:766.0,725.0] ||  -> .
% 0.18/0.46  777[5:Spt:767.0,17.1,529.0] || equal(multiply(sk_c1,sk_c7),sk_c2)** -> .
% 0.18/0.46  778[5:Spt:767.0,17.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  779[5:Rew:584.0,777.0,574.0,777.0] || equal(identity,sk_c2)** -> .
% 0.18/0.46  781[4:Rew:584.0,15.1,574.0,15.1] ||  -> equal(inverse(sk_c3),sk_c7)** equal(identity,sk_c2).
% 0.18/0.46  782[5:MRR:781.1,779.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  783[4:Rew:584.0,14.1,574.0,14.1] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)** equal(identity,sk_c2).
% 0.18/0.46  784[5:MRR:783.1,779.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  785[4:Rew:584.0,16.1,574.0,16.1] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)** equal(identity,sk_c2).
% 0.18/0.46  786[5:MRR:785.1,779.0] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  789[5:SpR:778.0,503.0] ||  -> equal(inverse(sk_c6),sk_c4)**.
% 0.18/0.46  803[5:SpR:782.0,503.0] ||  -> equal(inverse(sk_c7),sk_c3)**.
% 0.18/0.46  805[5:Rew:507.0,803.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  807[5:Rew:805.0,784.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c6)**.
% 0.18/0.46  808[5:Rew:584.0,807.0] ||  -> equal(identity,sk_c6)**.
% 0.18/0.46  809[5:Rew:808.0,468.0] ||  -> equal(inverse(sk_c6),sk_c6)**.
% 0.18/0.46  812[5:Rew:808.0,209.0] ||  -> equal(multiply(u,sk_c6),u)**.
% 0.18/0.46  813[5:Rew:808.0,23.0] ||  -> equal(multiply(sk_c6,u),u)**.
% 0.18/0.46  816[5:Rew:789.0,809.0] ||  -> equal(sk_c4,sk_c6)**.
% 0.18/0.46  818[5:Rew:816.0,786.0] ||  -> equal(multiply(sk_c6,sk_c6),sk_c5)**.
% 0.18/0.46  822[5:Rew:812.0,9.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  824[5:Rew:812.0,517.2] || equal(inverse(u),sk_c6)** equal(inverse(v),sk_c7) equal(u,sk_c5) equal(multiply(v,sk_c7),sk_c6)** -> .
% 0.18/0.46  826[5:Rew:822.0,507.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  837[5:Rew:813.0,818.0,822.0,818.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  843[5:Rew:837.0,812.0] ||  -> equal(multiply(u,sk_c7),u)**.
% 0.18/0.46  857[5:Rew:843.0,824.3,837.0,824.3,822.0,824.2,837.0,824.0] || equal(inverse(u),sk_c7)** equal(inverse(v),sk_c7)** equal(u,sk_c7) equal(v,sk_c7) -> .
% 0.18/0.46  858[5:Con:857.1] || equal(inverse(u),sk_c7)** equal(u,sk_c7) -> .
% 0.18/0.46  916[5:SpL:826.0,858.0] || equal(sk_c7,sk_c7)* equal(sk_c7,sk_c7)* -> .
% 0.18/0.46  917[5:Obv:916.1] ||  -> .
% 0.18/0.46  918[4:Spt:917.0,21.1,523.0] || equal(inverse(sk_c1),sk_c7)** -> .
% 0.18/0.46  919[4:Spt:917.0,21.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  920[4:MRR:19.1,918.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  921[4:MRR:18.0,918.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  922[4:MRR:20.0,918.0] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  924[4:SpR:919.0,503.0] ||  -> equal(inverse(sk_c6),sk_c4)**.
% 0.18/0.46  942[4:SpR:920.0,503.0] ||  -> equal(inverse(sk_c7),sk_c3)**.
% 0.18/0.46  945[4:Rew:507.0,942.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  947[4:Rew:945.0,921.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c6)**.
% 0.18/0.46  948[4:Rew:584.0,947.0] ||  -> equal(identity,sk_c6)**.
% 0.18/0.46  949[4:Rew:948.0,468.0] ||  -> equal(inverse(sk_c6),sk_c6)**.
% 0.18/0.46  950[4:Rew:948.0,23.0] ||  -> equal(multiply(sk_c6,u),u)**.
% 0.18/0.46  951[4:Rew:948.0,209.0] ||  -> equal(multiply(u,sk_c6),u)**.
% 0.18/0.46  955[4:Rew:924.0,949.0] ||  -> equal(sk_c4,sk_c6)**.
% 0.18/0.46  957[4:Rew:955.0,922.0] ||  -> equal(multiply(sk_c6,sk_c6),sk_c5)**.
% 0.18/0.46  966[4:Rew:951.0,517.2] || equal(inverse(u),sk_c6)** equal(inverse(v),sk_c7) equal(u,sk_c5) equal(multiply(v,sk_c7),sk_c6)** -> .
% 0.18/0.46  967[4:Rew:951.0,9.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  969[4:Rew:967.0,568.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  976[4:Rew:950.0,957.0,967.0,957.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  982[4:Rew:976.0,951.0] ||  -> equal(multiply(u,sk_c7),u)**.
% 0.18/0.46  996[4:Rew:982.0,966.3,976.0,966.3,967.0,966.2,976.0,966.0] || equal(inverse(u),sk_c7)** equal(inverse(v),sk_c7)** equal(u,sk_c7) equal(v,sk_c7) -> .
% 0.18/0.46  997[4:Con:996.1] || equal(inverse(u),sk_c7)** equal(u,sk_c7) -> .
% 0.18/0.46  1045[4:SpL:969.0,997.0] || equal(sk_c7,sk_c7)* equal(sk_c7,sk_c7)* -> .
% 0.18/0.46  1046[4:Obv:1045.1] ||  -> .
% 0.18/0.46  1047[3:Spt:1046.0,4.1,514.0] || equal(multiply(sk_c7,sk_c6),sk_c5)** -> .
% 0.18/0.46  1048[3:Spt:1046.0,4.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  1049[3:MRR:2.1,1047.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  1050[3:MRR:1.1,1047.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  1071[3:SpR:1049.0,503.0] ||  -> equal(inverse(sk_c7),sk_c3)**.
% 0.18/0.46  1074[3:Rew:507.0,1071.0] ||  -> equal(sk_c3,sk_c5)**.
% 0.18/0.46  1076[3:Rew:1074.0,1050.0] ||  -> equal(multiply(sk_c5,sk_c7),sk_c6)**.
% 0.18/0.46  1077[3:Rew:584.0,1076.0] ||  -> equal(identity,sk_c6)**.
% 0.18/0.46  1080[3:Rew:1077.0,209.0] ||  -> equal(multiply(u,sk_c6),u)**.
% 0.18/0.46  1090[3:Rew:1080.0,1047.0] || equal(sk_c5,sk_c7)** -> .
% 0.18/0.46  1091[3:Rew:1080.0,9.0] ||  -> equal(sk_c5,sk_c7)**.
% 0.18/0.46  1099[3:Rew:1091.0,1090.0] || equal(sk_c7,sk_c7)* -> .
% 0.18/0.46  1100[3:Obv:1099.0] ||  -> .
% 0.18/0.46  1120[2:Spt:1100.0,6.1,507.0] || equal(inverse(sk_c7),sk_c5)** -> .
% 0.18/0.46  1121[2:Spt:1100.0,6.0] ||  -> equal(inverse(sk_c3),sk_c7)**.
% 0.18/0.46  1122[2:MRR:8.1,1120.0] ||  -> equal(inverse(sk_c4),sk_c6)**.
% 0.18/0.46  1123[2:MRR:5.0,1120.0] ||  -> equal(multiply(sk_c3,sk_c7),sk_c6)**.
% 0.18/0.46  1124[2:MRR:7.0,1120.0] ||  -> equal(multiply(sk_c4,sk_c6),sk_c5)**.
% 0.18/0.46  1126[2:SpR:1121.0,503.0] ||  -> equal(inverse(sk_c7),sk_c3)**.
% 0.18/0.46  1127[2:SpR:1121.0,565.0] ||  -> equal(multiply(sk_c3,multiply(sk_c7,u)),u)**.
% 0.18/0.46  1129[2:Rew:1126.0,1120.0] || equal(sk_c3,sk_c5)** -> .
% 0.18/0.46  1136[2:SpR:1122.0,59.0] ||  -> equal(multiply(sk_c6,multiply(sk_c4,u)),u)**.
% 0.18/0.46  1151[2:SpR:1123.0,25.0] ||  -> equal(multiply(sk_c3,multiply(sk_c7,u)),multiply(sk_c6,u))**.
% 0.18/0.46  1155[2:Rew:1127.0,1151.0] ||  -> equal(multiply(sk_c6,u),u)**.
% 0.18/0.46  1156[2:Rew:1155.0,1136.0] ||  -> equal(multiply(sk_c4,u),u)**.
% 0.18/0.46  1159[2:Rew:1156.0,1124.0] ||  -> equal(sk_c5,sk_c6)**.
% 0.18/0.46  1160[2:Rew:1159.0,1129.0] || equal(sk_c3,sk_c6)** -> .
% 0.18/0.46  1161[2:Rew:1159.0,9.0] ||  -> equal(multiply(sk_c6,sk_c6),sk_c7)**.
% 0.18/0.46  1162[2:Rew:1159.0,80.0] ||  -> equal(multiply(inverse(sk_c6),sk_c7),sk_c6)**.
% 0.18/0.46  1163[2:Rew:1155.0,1161.0] ||  -> equal(sk_c6,sk_c7)**.
% 0.18/0.46  1170[2:Rew:1163.0,1160.0] || equal(sk_c3,sk_c7)** -> .
% 0.18/0.46  1176[2:Rew:24.0,1162.0,1163.0,1162.0] ||  -> equal(identity,sk_c7)**.
% 0.18/0.46  1177[2:Rew:1176.0,468.0] ||  -> equal(inverse(sk_c7),sk_c7)**.
% 0.18/0.46  1182[2:Rew:1126.0,1177.0] ||  -> equal(sk_c3,sk_c7)**.
% 0.18/0.46  1183[2:MRR:1182.0,1170.0] ||  -> .
% 0.18/0.46  % SZS output end Refutation
% 0.18/0.46  Formulae used in the proof : prove_this_1 prove_this_2 prove_this_3 prove_this_4 prove_this_5 prove_this_6 prove_this_7 prove_this_8 prove_this_9 prove_this_10 prove_this_11 prove_this_12 prove_this_13 prove_this_14 prove_this_15 prove_this_16 prove_this_17 prove_this_18 prove_this_19 prove_this_20 prove_this_21 prove_this_22 left_identity left_inverse associativity
% 0.18/0.46  
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