TSTP Solution File: GRP775+1 by SPASS---3.9

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : SPASS---3.9
% Problem  : GRP775+1 : TPTP v8.1.0. Released v4.1.0.
% Transfm  : none
% Format   : tptp
% Command  : run_spass %d %s

% Computer : n006.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 11:49:21 EDT 2022

% Result   : Theorem 7.44s 7.66s
% Output   : Refutation 7.44s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   25
%            Number of leaves      :   14
% Syntax   : Number of clauses     :   96 (  24 unt;   2 nHn;  96 RR)
%            Number of literals    :  196 (   0 equ; 108 neg)
%            Maximal clause size   :    4 (   2 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of predicates  :    5 (   4 usr;   1 prp; 0-2 aty)
%            Number of functors    :    8 (   8 usr;   6 con; 0-2 aty)
%            Number of variables   :    0 (   0 sgn)

% Comments : 
%------------------------------------------------------------------------------
cnf(1,axiom,
    equal(product(u,u),u),
    file('GRP775+1.p',unknown),
    [] ).

cnf(2,axiom,
    r(u,skf1(v,u)),
    file('GRP775+1.p',unknown),
    [] ).

cnf(3,axiom,
    ( ~ l(u,v)
    | equal(product(u,v),u) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(4,axiom,
    ( ~ l(u,v)
    | equal(product(v,u),v) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(5,axiom,
    ( ~ r(u,v)
    | equal(product(u,v),v) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(6,axiom,
    ( ~ r(u,v)
    | equal(product(v,u),u) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(7,axiom,
    ( ~ d(u,v)
    | l(skf1(v,u),v) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(8,axiom,
    ( d(skc2,skc3)
    | equal(product(skc2,product(skc3,skc2)),skc2) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(9,axiom,
    ( d(skc2,skc3)
    | equal(product(skc3,product(skc2,skc3)),skc3) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(10,axiom,
    equal(product(product(u,v),w),product(u,product(v,w))),
    file('GRP775+1.p',unknown),
    [] ).

cnf(11,axiom,
    ( ~ l(u,v)
    | ~ r(w,u)
    | d(w,v) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(12,axiom,
    ( ~ equal(product(u,v),u)
    | ~ equal(product(v,u),v)
    | l(v,u) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(13,axiom,
    ( ~ equal(product(u,v),v)
    | ~ equal(product(v,u),u)
    | r(v,u) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(14,axiom,
    ( ~ d(skc2,skc3)
    | ~ equal(product(skc3,product(skc2,skc3)),skc3)
    | ~ equal(product(skc2,product(skc3,skc2)),skc2) ),
    file('GRP775+1.p',unknown),
    [] ).

cnf(15,plain,
    d(skc2,skc3),
    inference(spt,[spt(split,[position(s1)])],[9]),
    [iquote('1:Spt:9.0')] ).

cnf(16,plain,
    ( ~ equal(product(skc3,product(skc2,skc3)),skc3)
    | ~ equal(product(skc2,product(skc3,skc2)),skc2) ),
    inference(mrr,[status(thm)],[14,15]),
    [iquote('1:MRR:14.0,15.0')] ).

cnf(32,plain,
    equal(product(u,product(v,product(u,v))),product(u,v)),
    inference(spr,[status(thm),theory(equality)],[10,1]),
    [iquote('0:SpR:10.0,1.0')] ).

cnf(33,plain,
    ( ~ r(u,product(v,w))
    | equal(product(v,product(w,u)),u) ),
    inference(spr,[status(thm),theory(equality)],[10,6]),
    [iquote('0:SpR:10.0,6.1')] ).

cnf(35,plain,
    ( ~ r(product(u,v),w)
    | equal(product(u,product(v,w)),w) ),
    inference(spr,[status(thm),theory(equality)],[10,5]),
    [iquote('0:SpR:10.0,5.1')] ).

cnf(39,plain,
    equal(product(u,product(u,v)),product(u,v)),
    inference(spr,[status(thm),theory(equality)],[1,10]),
    [iquote('0:SpR:1.0,10.0')] ).

cnf(40,plain,
    ( ~ l(u,v)
    | equal(product(v,product(u,w)),product(v,w)) ),
    inference(spr,[status(thm),theory(equality)],[4,10]),
    [iquote('0:SpR:4.1,10.0')] ).

cnf(42,plain,
    ( ~ l(u,v)
    | equal(product(u,product(v,w)),product(u,w)) ),
    inference(spr,[status(thm),theory(equality)],[3,10]),
    [iquote('0:SpR:3.1,10.0')] ).

cnf(108,plain,
    ( ~ equal(u,u)
    | ~ equal(product(u,u),u)
    | r(u,u) ),
    inference(spl,[status(thm),theory(equality)],[1,13]),
    [iquote('0:SpL:1.0,13.0')] ).

cnf(112,plain,
    ( ~ r(u,v)
    | ~ equal(v,v)
    | ~ equal(product(v,u),u)
    | r(v,u) ),
    inference(spl,[status(thm),theory(equality)],[5,13]),
    [iquote('0:SpL:5.1,13.0')] ).

cnf(114,plain,
    ( ~ equal(product(u,v),product(u,v))
    | ~ equal(product(product(u,v),u),u)
    | r(product(u,v),u) ),
    inference(spl,[status(thm),theory(equality)],[39,13]),
    [iquote('0:SpL:39.0,13.0')] ).

cnf(116,plain,
    ( ~ equal(product(u,u),u)
    | r(u,u) ),
    inference(obv,[status(thm),theory(equality)],[108]),
    [iquote('0:Obv:108.0')] ).

cnf(117,plain,
    ( ~ equal(u,u)
    | r(u,u) ),
    inference(rew,[status(thm),theory(equality)],[1,116]),
    [iquote('0:Rew:1.0,116.0')] ).

cnf(118,plain,
    r(u,u),
    inference(obv,[status(thm),theory(equality)],[117]),
    [iquote('0:Obv:117.0')] ).

cnf(123,plain,
    ( ~ r(u,v)
    | ~ equal(product(v,u),u)
    | r(v,u) ),
    inference(obv,[status(thm),theory(equality)],[112]),
    [iquote('0:Obv:112.1')] ).

cnf(124,plain,
    ( ~ r(u,v)
    | ~ equal(u,u)
    | r(v,u) ),
    inference(rew,[status(thm),theory(equality)],[6,123]),
    [iquote('0:Rew:6.1,123.1')] ).

cnf(125,plain,
    ( ~ r(u,v)
    | r(v,u) ),
    inference(obv,[status(thm),theory(equality)],[124]),
    [iquote('0:Obv:124.1')] ).

cnf(126,plain,
    ( ~ equal(product(product(u,v),u),u)
    | r(product(u,v),u) ),
    inference(obv,[status(thm),theory(equality)],[114]),
    [iquote('0:Obv:114.0')] ).

cnf(127,plain,
    ( ~ equal(product(u,product(v,u)),u)
    | r(product(u,v),u) ),
    inference(rew,[status(thm),theory(equality)],[10,126]),
    [iquote('0:Rew:10.0,126.0')] ).

cnf(129,plain,
    r(skf1(u,v),v),
    inference(res,[status(thm),theory(equality)],[2,125]),
    [iquote('0:Res:2.0,125.0')] ).

cnf(145,plain,
    ( ~ l(u,v)
    | ~ equal(u,u)
    | ~ equal(product(v,u),v)
    | l(v,u) ),
    inference(spl,[status(thm),theory(equality)],[3,12]),
    [iquote('0:SpL:3.1,12.0')] ).

cnf(149,plain,
    ( ~ equal(product(u,product(v,w)),product(u,v))
    | ~ equal(product(w,product(u,v)),w)
    | l(w,product(u,v)) ),
    inference(spl,[status(thm),theory(equality)],[10,12]),
    [iquote('0:SpL:10.0,12.0')] ).

cnf(155,plain,
    ( ~ l(u,v)
    | ~ equal(product(v,u),v)
    | l(v,u) ),
    inference(obv,[status(thm),theory(equality)],[145]),
    [iquote('0:Obv:145.1')] ).

cnf(156,plain,
    ( ~ l(u,v)
    | ~ equal(v,v)
    | l(v,u) ),
    inference(rew,[status(thm),theory(equality)],[4,155]),
    [iquote('0:Rew:4.1,155.1')] ).

cnf(157,plain,
    ( ~ l(u,v)
    | l(v,u) ),
    inference(obv,[status(thm),theory(equality)],[156]),
    [iquote('0:Obv:156.1')] ).

cnf(165,plain,
    ( ~ d(u,v)
    | l(v,skf1(v,u)) ),
    inference(res,[status(thm),theory(equality)],[7,157]),
    [iquote('0:Res:7.1,157.0')] ).

cnf(226,plain,
    ( ~ r(u,product(v,w))
    | equal(product(v,u),u) ),
    inference(spr,[status(thm),theory(equality)],[33,39]),
    [iquote('0:SpR:33.1,39.0')] ).

cnf(245,plain,
    ( ~ r(skc3,product(skc3,skc2))
    | ~ equal(skc3,skc3)
    | ~ equal(product(skc2,product(skc3,skc2)),skc2) ),
    inference(spl,[status(thm),theory(equality)],[33,16]),
    [iquote('1:SpL:33.1,16.0')] ).

cnf(253,plain,
    ( ~ r(skc3,product(skc3,skc2))
    | ~ equal(product(skc2,product(skc3,skc2)),skc2) ),
    inference(obv,[status(thm),theory(equality)],[245]),
    [iquote('1:Obv:245.1')] ).

cnf(263,plain,
    ( ~ r(product(u,v),w)
    | equal(product(u,product(product(v,w),x)),product(w,x)) ),
    inference(spr,[status(thm),theory(equality)],[35,10]),
    [iquote('0:SpR:35.1,10.0')] ).

cnf(264,plain,
    ( ~ r(product(u,v),w)
    | equal(product(u,w),w) ),
    inference(spr,[status(thm),theory(equality)],[35,39]),
    [iquote('0:SpR:35.1,39.0')] ).

cnf(290,plain,
    ( ~ r(product(u,v),w)
    | equal(product(u,product(v,product(w,x))),product(w,x)) ),
    inference(rew,[status(thm),theory(equality)],[10,263]),
    [iquote('0:Rew:10.0,263.1')] ).

cnf(300,plain,
    ( ~ r(u,v)
    | ~ r(w,u)
    | equal(product(v,w),w) ),
    inference(spl,[status(thm),theory(equality)],[6,226]),
    [iquote('0:SpL:6.1,226.0')] ).

cnf(313,plain,
    ( ~ r(u,v)
    | ~ r(u,w)
    | equal(product(v,w),w) ),
    inference(spl,[status(thm),theory(equality)],[6,264]),
    [iquote('0:SpL:6.1,264.0')] ).

cnf(444,plain,
    ( ~ l(u,v)
    | equal(product(u,product(w,product(v,w))),product(u,product(v,w))) ),
    inference(spr,[status(thm),theory(equality)],[32,42]),
    [iquote('0:SpR:32.0,42.1')] ).

cnf(462,plain,
    ( ~ l(u,v)
    | equal(product(u,product(w,product(v,w))),product(u,w)) ),
    inference(rew,[status(thm),theory(equality)],[42,444]),
    [iquote('0:Rew:42.1,444.1')] ).

cnf(1100,plain,
    ( ~ equal(product(product(u,v),product(u,v)),product(u,v))
    | r(product(product(u,v),u),product(u,v)) ),
    inference(spl,[status(thm),theory(equality)],[39,127]),
    [iquote('0:SpL:39.0,127.0')] ).

cnf(1103,plain,
    ( ~ l(u,v)
    | ~ equal(product(product(u,w),product(v,w)),product(u,w))
    | r(product(product(u,w),v),product(u,w)) ),
    inference(spl,[status(thm),theory(equality)],[40,127]),
    [iquote('0:SpL:40.1,127.0')] ).

cnf(1145,plain,
    ( ~ equal(product(u,v),product(u,v))
    | r(product(u,product(v,u)),product(u,v)) ),
    inference(rew,[status(thm),theory(equality)],[10,1100,32]),
    [iquote('0:Rew:10.0,1100.1,32.0,1100.0,10.0,1100.0')] ).

cnf(1146,plain,
    r(product(u,product(v,u)),product(u,v)),
    inference(obv,[status(thm),theory(equality)],[1145]),
    [iquote('0:Obv:1145.0')] ).

cnf(1150,plain,
    ( ~ l(u,v)
    | ~ equal(product(u,product(w,product(v,w))),product(u,w))
    | r(product(u,product(w,v)),product(u,w)) ),
    inference(rew,[status(thm),theory(equality)],[10,1103]),
    [iquote('0:Rew:10.0,1103.2,10.0,1103.1')] ).

cnf(1151,plain,
    ( ~ l(u,v)
    | ~ equal(product(u,w),product(u,w))
    | r(product(u,product(w,v)),product(u,w)) ),
    inference(rew,[status(thm),theory(equality)],[462,1150]),
    [iquote('0:Rew:462.1,1150.1')] ).

cnf(1152,plain,
    ( ~ l(u,v)
    | r(product(u,product(w,v)),product(u,w)) ),
    inference(obv,[status(thm),theory(equality)],[1151]),
    [iquote('0:Obv:1151.1')] ).

cnf(1176,plain,
    ( ~ r(product(u,v),w)
    | r(product(u,product(product(v,w),u)),w) ),
    inference(spr,[status(thm),theory(equality)],[35,1146]),
    [iquote('0:SpR:35.1,1146.0')] ).

cnf(1235,plain,
    ( ~ r(product(u,v),w)
    | r(product(u,product(v,product(w,u))),w) ),
    inference(rew,[status(thm),theory(equality)],[10,1176]),
    [iquote('0:Rew:10.0,1176.1')] ).

cnf(1236,plain,
    ( ~ r(product(u,v),w)
    | r(product(w,u),w) ),
    inference(rew,[status(thm),theory(equality)],[290,1235]),
    [iquote('0:Rew:290.1,1235.1')] ).

cnf(1382,plain,
    ( ~ equal(product(u,v),product(u,v))
    | ~ equal(product(v,product(u,v)),v)
    | l(v,product(u,v)) ),
    inference(spl,[status(thm),theory(equality)],[1,149]),
    [iquote('0:SpL:1.0,149.0')] ).

cnf(1415,plain,
    ( ~ equal(product(u,product(v,u)),u)
    | l(u,product(v,u)) ),
    inference(obv,[status(thm),theory(equality)],[1382]),
    [iquote('0:Obv:1382.0')] ).

cnf(1540,plain,
    ( ~ r(u,v)
    | ~ r(u,w)
    | r(product(w,v),w) ),
    inference(spl,[status(thm),theory(equality)],[6,1236]),
    [iquote('0:SpL:6.1,1236.0')] ).

cnf(1562,plain,
    ( ~ r(u,v)
    | ~ r(u,w)
    | r(v,w) ),
    inference(rew,[status(thm),theory(equality)],[313,1540]),
    [iquote('0:Rew:313.2,1540.2')] ).

cnf(1657,plain,
    ( ~ r(skf1(u,v),w)
    | r(v,w) ),
    inference(res,[status(thm),theory(equality)],[129,1562]),
    [iquote('0:Res:129.0,1562.0')] ).

cnf(1671,plain,
    r(u,skf1(v,skf1(w,u))),
    inference(res,[status(thm),theory(equality)],[2,1657]),
    [iquote('0:Res:2.0,1657.0')] ).

cnf(2074,plain,
    ( ~ equal(product(product(u,product(v,u)),product(v,u)),product(u,product(v,u)))
    | l(product(u,product(v,u)),product(v,product(u,product(v,u)))) ),
    inference(spl,[status(thm),theory(equality)],[32,1415]),
    [iquote('0:SpL:32.0,1415.0')] ).

cnf(2078,plain,
    ( ~ l(u,v)
    | ~ equal(product(product(u,w),product(v,w)),product(u,w))
    | l(product(u,w),product(v,product(u,w))) ),
    inference(spl,[status(thm),theory(equality)],[40,1415]),
    [iquote('0:SpL:40.1,1415.0')] ).

cnf(2125,plain,
    ( ~ l(u,v)
    | ~ equal(product(u,product(w,product(v,w))),product(u,w))
    | l(product(u,w),product(v,w)) ),
    inference(rew,[status(thm),theory(equality)],[40,2078,10]),
    [iquote('0:Rew:40.1,2078.2,10.0,2078.1')] ).

cnf(2126,plain,
    ( ~ l(u,v)
    | ~ equal(product(u,w),product(u,w))
    | l(product(u,w),product(v,w)) ),
    inference(rew,[status(thm),theory(equality)],[462,2125]),
    [iquote('0:Rew:462.1,2125.1')] ).

cnf(2127,plain,
    ( ~ l(u,v)
    | l(product(u,w),product(v,w)) ),
    inference(obv,[status(thm),theory(equality)],[2126]),
    [iquote('0:Obv:2126.1')] ).

cnf(2141,plain,
    ( ~ equal(product(u,product(v,u)),product(u,product(v,u)))
    | l(product(u,product(v,u)),product(v,u)) ),
    inference(rew,[status(thm),theory(equality)],[32,2074,10]),
    [iquote('0:Rew:32.0,2074.1,32.0,2074.0,10.0,2074.0,10.0,2074.0')] ).

cnf(2142,plain,
    l(product(u,product(v,u)),product(v,u)),
    inference(obv,[status(thm),theory(equality)],[2141]),
    [iquote('0:Obv:2141.0')] ).

cnf(2198,plain,
    ( ~ l(product(skc3,skc2),skc2)
    | ~ r(skc3,product(skc3,skc2))
    | ~ equal(skc2,skc2) ),
    inference(spl,[status(thm),theory(equality)],[4,253]),
    [iquote('1:SpL:4.1,253.1')] ).

cnf(2210,plain,
    ( ~ l(product(skc3,skc2),skc2)
    | ~ r(skc3,product(skc3,skc2)) ),
    inference(obv,[status(thm),theory(equality)],[2198]),
    [iquote('1:Obv:2198.2')] ).

cnf(2655,plain,
    l(product(u,v),product(v,product(u,v))),
    inference(res,[status(thm),theory(equality)],[2142,157]),
    [iquote('0:Res:2142.0,157.0')] ).

cnf(7341,plain,
    ( ~ r(u,skf1(v,w))
    | equal(product(w,u),u) ),
    inference(res,[status(thm),theory(equality)],[129,300]),
    [iquote('0:Res:129.0,300.0')] ).

cnf(7564,plain,
    equal(product(skf1(u,v),v),v),
    inference(res,[status(thm),theory(equality)],[1671,7341]),
    [iquote('0:Res:1671.0,7341.0')] ).

cnf(7569,plain,
    equal(product(u,skf1(v,u)),skf1(v,u)),
    inference(res,[status(thm),theory(equality)],[118,7341]),
    [iquote('0:Res:118.0,7341.0')] ).

cnf(7618,plain,
    ( ~ l(u,skf1(v,w))
    | l(product(u,w),w) ),
    inference(spr,[status(thm),theory(equality)],[7564,2127]),
    [iquote('0:SpR:7564.0,2127.1')] ).

cnf(9342,plain,
    ( ~ d(u,v)
    | l(product(v,u),u) ),
    inference(res,[status(thm),theory(equality)],[165,7618]),
    [iquote('0:Res:165.1,7618.0')] ).

cnf(9404,plain,
    ( ~ d(skc2,skc3)
    | ~ r(skc3,product(skc3,skc2)) ),
    inference(res,[status(thm),theory(equality)],[9342,2210]),
    [iquote('1:Res:9342.1,2210.0')] ).

cnf(9415,plain,
    ~ r(skc3,product(skc3,skc2)),
    inference(mrr,[status(thm)],[9404,15]),
    [iquote('1:MRR:9404.0,15.0')] ).

cnf(15772,plain,
    ( ~ l(u,skf1(v,w))
    | r(product(u,skf1(v,w)),product(u,w)) ),
    inference(spr,[status(thm),theory(equality)],[7569,1152]),
    [iquote('0:SpR:7569.0,1152.1')] ).

cnf(15888,plain,
    ( ~ l(u,skf1(v,w))
    | r(u,product(u,w)) ),
    inference(rew,[status(thm),theory(equality)],[3,15772]),
    [iquote('0:Rew:3.1,15772.1')] ).

cnf(16307,plain,
    ( ~ d(u,v)
    | r(v,product(v,u)) ),
    inference(res,[status(thm),theory(equality)],[165,15888]),
    [iquote('0:Res:165.1,15888.0')] ).

cnf(16399,plain,
    ~ d(skc2,skc3),
    inference(res,[status(thm),theory(equality)],[16307,9415]),
    [iquote('1:Res:16307.1,9415.0')] ).

cnf(16416,plain,
    $false,
    inference(mrr,[status(thm)],[16399,15]),
    [iquote('1:MRR:16399.0,15.0')] ).

cnf(16440,plain,
    ~ d(skc2,skc3),
    inference(spt,[spt(split,[position(sa)])],[16416,15]),
    [iquote('1:Spt:16416.0,9.0,15.0')] ).

cnf(16441,plain,
    equal(product(skc3,product(skc2,skc3)),skc3),
    inference(spt,[spt(split,[position(s2)])],[9]),
    [iquote('1:Spt:16416.0,9.1')] ).

cnf(16442,plain,
    equal(product(skc2,product(skc3,skc2)),skc2),
    inference(mrr,[status(thm)],[8,16440]),
    [iquote('1:MRR:8.0,16440.0')] ).

cnf(16513,plain,
    l(product(skc2,skc3),skc3),
    inference(spr,[status(thm),theory(equality)],[16441,2655]),
    [iquote('1:SpR:16441.0,2655.0')] ).

cnf(16718,plain,
    ( ~ r(u,product(skc2,skc3))
    | d(u,skc3) ),
    inference(res,[status(thm),theory(equality)],[16513,11]),
    [iquote('1:Res:16513.0,11.0')] ).

cnf(20206,plain,
    d(product(skc2,product(skc3,skc2)),skc3),
    inference(res,[status(thm),theory(equality)],[1146,16718]),
    [iquote('1:Res:1146.0,16718.0')] ).

cnf(20213,plain,
    d(skc2,skc3),
    inference(rew,[status(thm),theory(equality)],[16442,20206]),
    [iquote('1:Rew:16442.0,20206.0')] ).

cnf(20214,plain,
    $false,
    inference(mrr,[status(thm)],[20213,16440]),
    [iquote('1:MRR:20213.0,16440.0')] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.06/0.12  % Problem  : GRP775+1 : TPTP v8.1.0. Released v4.1.0.
% 0.06/0.12  % Command  : run_spass %d %s
% 0.12/0.33  % Computer : n006.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
% 0.12/0.34  % CPULimit : 300
% 0.12/0.34  % WCLimit  : 600
% 0.12/0.34  % DateTime : Tue Jun 14 13:26:56 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 7.44/7.66  
% 7.44/7.66  SPASS V 3.9 
% 7.44/7.66  SPASS beiseite: Proof found.
% 7.44/7.66  % SZS status Theorem
% 7.44/7.66  Problem: /export/starexec/sandbox2/benchmark/theBenchmark.p 
% 7.44/7.66  SPASS derived 14948 clauses, backtracked 4 clauses, performed 1 splits and kept 4230 clauses.
% 7.44/7.66  SPASS allocated 98763 KBytes.
% 7.44/7.66  SPASS spent	0:00:07.19 on the problem.
% 7.44/7.66  		0:00:00.03 for the input.
% 7.44/7.66  		0:00:00.02 for the FLOTTER CNF translation.
% 7.44/7.66  		0:00:00.11 for inferences.
% 7.44/7.66  		0:00:00.06 for the backtracking.
% 7.44/7.66  		0:00:06.91 for the reduction.
% 7.44/7.66  
% 7.44/7.66  
% 7.44/7.66  Here is a proof with depth 12, length 96 :
% 7.44/7.66  % SZS output start Refutation
% See solution above
% 7.44/7.66  Formulae used in the proof : sos02 sos05 sos03 sos04 goals sos01
% 7.44/7.66  
%------------------------------------------------------------------------------