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Prover9---2026-6A.UNS-CRf.s

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%------------------------------------------------------------------------------
% File     : Prover9---2026-6A
% Problem  : GRP299-1 : TPTP v9.3.1. Released v2.5.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p

% Computer : n002.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8046.5625MB
% OS       : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Sun Sep 27 07:28:35 AM UTC 2026

% Result   : Unsatisfiable 2.99s 1.39s
% Output   : CNFRefutation 2.99s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   47
%            Number of leaves      :   12
% Syntax   : Number of formulae    :  102 (  24 unt;   0 def)
%            Number of atoms       :  253 ( 252 equ)
%            Maximal formula atoms :   10 (   2 avg)
%            Number of connectives :  257 ( 106   ~; 151   |;   0   &)
%                                         (   0 <=>;   0  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   15 (   3 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of predicates  :    2 (   0 usr;   1 prp; 0-2 aty)
%            Number of functors    :   10 (  10 usr;   8 con; 0-2 aty)
%            Number of variables   :   36 (   0 sgn   9   !;   0   ?)

% Comments : 
%------------------------------------------------------------------------------
fof(left_identity,axiom,
    ! [VAR_0] : multiply(identity,VAR_0) = VAR_0,
    file('theBenchmark.p',left_identity) ).

cnf(c_1,plain,
    multiply(identity,A) = A,
    inference(clausify,[status(thm)],[left_identity]) ).

fof(left_inverse,axiom,
    ! [VAR_0] : multiply(inverse(VAR_0),VAR_0) = identity,
    file('theBenchmark.p',left_inverse) ).

cnf(c_2,plain,
    multiply(inverse(A),A) = identity,
    inference(clausify,[status(thm)],[left_inverse]) ).

fof(associativity,axiom,
    ! [VAR_0,VAR_1,VAR_2] : multiply(multiply(VAR_0,VAR_1),VAR_2) = multiply(VAR_0,multiply(VAR_1,VAR_2)),
    file('theBenchmark.p',associativity) ).

cnf(c_3,plain,
    multiply(multiply(A,B),C) = multiply(A,multiply(B,C)),
    inference(clausify,[status(thm)],[associativity]) ).

fof(prove_this_1,axiom,
    ( multiply(sk_c6,sk_c7) = sk_c5
    | multiply(sk_c7,sk_c6) = sk_c5 ),
    file('theBenchmark.p',prove_this_1) ).

cnf(c_4,plain,
    ( multiply(sk_c6,sk_c7) = sk_c5
    | multiply(sk_c7,sk_c6) = sk_c5 ),
    inference(clausify,[status(thm)],[prove_this_1]) ).

fof(prove_this_3,axiom,
    ( multiply(sk_c2,sk_c6) = sk_c7
    | multiply(sk_c7,sk_c6) = sk_c5 ),
    file('theBenchmark.p',prove_this_3) ).

cnf(c_6,plain,
    ( multiply(sk_c2,sk_c6) = sk_c7
    | multiply(sk_c7,sk_c6) = sk_c5 ),
    inference(clausify,[status(thm)],[prove_this_3]) ).

fof(prove_this_10,axiom,
    ( multiply(sk_c3,sk_c4) = sk_c6
    | multiply(sk_c1,sk_c7) = sk_c6 ),
    file('theBenchmark.p',prove_this_10) ).

cnf(c_13,plain,
    ( multiply(sk_c3,sk_c4) = sk_c6
    | multiply(sk_c1,sk_c7) = sk_c6 ),
    inference(clausify,[status(thm)],[prove_this_10]) ).

fof(prove_this_11,axiom,
    ( inverse(sk_c3) = sk_c4
    | multiply(sk_c1,sk_c7) = sk_c6 ),
    file('theBenchmark.p',prove_this_11) ).

cnf(c_14,plain,
    ( inverse(sk_c3) = sk_c4
    | multiply(sk_c1,sk_c7) = sk_c6 ),
    inference(clausify,[status(thm)],[prove_this_11]) ).

fof(prove_this_16,axiom,
    ( multiply(sk_c3,sk_c4) = sk_c6
    | inverse(sk_c1) = sk_c7 ),
    file('theBenchmark.p',prove_this_16) ).

cnf(c_19,plain,
    ( multiply(sk_c3,sk_c4) = sk_c6
    | inverse(sk_c1) = sk_c7 ),
    inference(clausify,[status(thm)],[prove_this_16]) ).

fof(prove_this_17,axiom,
    ( inverse(sk_c3) = sk_c4
    | inverse(sk_c1) = sk_c7 ),
    file('theBenchmark.p',prove_this_17) ).

cnf(c_20,plain,
    ( inverse(sk_c3) = sk_c4
    | inverse(sk_c1) = sk_c7 ),
    inference(clausify,[status(thm)],[prove_this_17]) ).

fof(prove_this_20,axiom,
    ( inverse(sk_c2) = sk_c7
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    file('theBenchmark.p',prove_this_20) ).

cnf(c_23,plain,
    ( inverse(sk_c2) = sk_c7
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    inference(clausify,[status(thm)],[prove_this_20]) ).

fof(prove_this_21,axiom,
    ( multiply(sk_c2,sk_c6) = sk_c7
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    file('theBenchmark.p',prove_this_21) ).

cnf(c_24,plain,
    ( multiply(sk_c2,sk_c6) = sk_c7
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    inference(clausify,[status(thm)],[prove_this_21]) ).

fof(prove_this_25,axiom,
    ! [VAR_0,VAR_1,VAR_2,VAR_3] :
      ( multiply(VAR_3,sk_c7) != sk_c6
      | inverse(VAR_2) != VAR_3
      | multiply(VAR_2,VAR_3) != sk_c6
      | multiply(VAR_1,sk_c6) != sk_c7
      | inverse(VAR_1) != sk_c7
      | multiply(sk_c6,sk_c7) != sk_c5
      | multiply(sk_c5,sk_c7) != sk_c6
      | inverse(VAR_0) != sk_c7
      | multiply(VAR_0,sk_c7) != sk_c6
      | multiply(sk_c7,sk_c6) != sk_c5 ),
    file('theBenchmark.p',prove_this_25) ).

cnf(c_28,plain,
    ( multiply(D,sk_c7) != sk_c6
    | inverse(C) != D
    | multiply(C,D) != sk_c6
    | multiply(B,sk_c6) != sk_c7
    | inverse(B) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(A) != sk_c7
    | multiply(A,sk_c7) != sk_c6
    | multiply(sk_c7,sk_c6) != sk_c5 ),
    inference(clausify,[status(thm)],[prove_this_25]) ).

cnf(c_1029,plain,
    ( multiply(sk_c7,sk_c7) != sk_c6
    | inverse(A) != sk_c7
    | multiply(B,sk_c6) != sk_c7
    | inverse(B) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(A) != sk_c7
    | multiply(A,sk_c7) != sk_c6
    | multiply(sk_c7,sk_c6) != sk_c5 ),
    inference(factor,[status(thm)],[c_28]) ).

cnf(c_30,plain,
    ( multiply(sk_c7,sk_c7) != sk_c6
    | multiply(B,sk_c6) != sk_c7
    | inverse(B) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(A) != sk_c7
    | multiply(A,sk_c7) != sk_c6
    | multiply(sk_c7,sk_c6) != sk_c5 ),
    inference(copy,[status(thm)],[c_1029]) ).

cnf(c_37,plain,
    ( multiply(A,sk_c6) != sk_c7
    | inverse(A) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | multiply(sk_c7,sk_c6) != sk_c5 ),
    inference(factor,[status(thm)],[c_30]) ).

cnf(c_43,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | multiply(sk_c7,sk_c6) != sk_c5 ),
    inference(factor,[status(thm)],[c_37]) ).

cnf(c_1030,plain,
    multiply(identity,A) = multiply(inverse(B),multiply(B,A)),
    inference(paramod,[status(thm)],[c_2,c_3]) ).

cnf(c_1031,plain,
    A = multiply(inverse(B),multiply(B,A)),
    inference(paramod,[status(thm)],[c_1,c_1030]) ).

cnf(c_44,plain,
    multiply(inverse(A),multiply(A,B)) = B,
    inference(copy,[status(thm)],[c_1031]) ).

cnf(c_52,plain,
    ( multiply(sk_c5,A) = multiply(sk_c7,multiply(sk_c6,A))
    | multiply(sk_c2,sk_c6) = sk_c7 ),
    inference(paramod,[status(thm)],[c_6,c_3]) ).

cnf(c_100,plain,
    ( multiply(sk_c7,sk_c1) = identity
    | inverse(sk_c3) = sk_c4 ),
    inference(paramod,[status(thm)],[c_20,c_2]) ).

cnf(c_109,plain,
    ( multiply(sk_c7,sk_c2) = identity
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    inference(paramod,[status(thm)],[c_23,c_2]) ).

cnf(c_128,plain,
    multiply(inverse(inverse(A)),identity) = A,
    inference(paramod,[status(thm)],[c_2,c_44]) ).

cnf(c_131,plain,
    ( multiply(inverse(sk_c6),sk_c5) = sk_c7
    | multiply(sk_c7,sk_c6) = sk_c5 ),
    inference(paramod,[status(thm)],[c_4,c_44]) ).

cnf(c_168,plain,
    ( multiply(inverse(sk_c5),sk_c6) = sk_c7
    | inverse(sk_c2) = sk_c7 ),
    inference(paramod,[status(thm)],[c_23,c_44]) ).

cnf(c_170,plain,
    ( multiply(inverse(sk_c5),sk_c6) = sk_c7
    | multiply(sk_c2,sk_c6) = sk_c7 ),
    inference(paramod,[status(thm)],[c_24,c_44]) ).

cnf(c_178,plain,
    multiply(inverse(inverse(A)),B) = multiply(A,B),
    inference(paramod,[status(thm)],[c_44,c_44]) ).

cnf(c_179,plain,
    multiply(A,identity) = A,
    inference(paramod,[status(thm)],[c_178,c_128]) ).

cnf(c_186,plain,
    inverse(identity) = identity,
    inference(paramod,[status(thm)],[c_179,c_2]) ).

cnf(c_1032,plain,
    ( multiply(inverse(sk_c7),identity) = sk_c1
    | inverse(sk_c3) = sk_c4 ),
    inference(paramod,[status(thm)],[c_100,c_44]) ).

cnf(c_254,plain,
    ( inverse(sk_c7) = sk_c1
    | inverse(sk_c3) = sk_c4 ),
    inference(paramod,[status(thm)],[c_179,c_1032]) ).

cnf(c_256,plain,
    ( multiply(sk_c1,sk_c7) = identity
    | inverse(sk_c3) = sk_c4 ),
    inference(paramod,[status(thm)],[c_254,c_2]) ).

cnf(c_1033,plain,
    ( multiply(sk_c2,sk_c6) = sk_c7
    | multiply(sk_c7,multiply(sk_c6,sk_c7)) = sk_c6
    | multiply(sk_c2,sk_c6) = sk_c7 ),
    inference(paramod,[status(thm)],[c_52,c_24]) ).

cnf(c_347,plain,
    ( multiply(sk_c7,multiply(sk_c6,sk_c7)) = sk_c6
    | multiply(sk_c2,sk_c6) = sk_c7 ),
    inference(copy,[status(thm)],[c_1033]) ).

cnf(c_1034,plain,
    ( inverse(sk_c3) = sk_c4
    | identity = sk_c6
    | inverse(sk_c3) = sk_c4 ),
    inference(paramod,[status(thm)],[c_256,c_14]) ).

cnf(c_405,plain,
    ( identity = sk_c6
    | inverse(sk_c3) = sk_c4 ),
    inference(copy,[status(thm)],[c_1034]) ).

cnf(c_409,plain,
    ( multiply(sk_c4,sk_c3) = identity
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_405,c_2]) ).

cnf(c_1035,plain,
    ( multiply(inverse(sk_c4),identity) = sk_c3
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_409,c_44]) ).

cnf(c_419,plain,
    ( inverse(sk_c4) = sk_c3
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_179,c_1035]) ).

cnf(c_425,plain,
    ( multiply(sk_c3,sk_c4) = identity
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_419,c_2]) ).

cnf(c_1036,plain,
    ( identity = sk_c6
    | multiply(sk_c1,sk_c7) = sk_c6
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_425,c_13]) ).

cnf(c_450,plain,
    ( multiply(sk_c1,sk_c7) = sk_c6
    | identity = sk_c6 ),
    inference(copy,[status(thm)],[c_1036]) ).

cnf(c_1037,plain,
    ( identity = sk_c6
    | inverse(sk_c1) = sk_c7
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_425,c_19]) ).

cnf(c_451,plain,
    ( inverse(sk_c1) = sk_c7
    | identity = sk_c6 ),
    inference(copy,[status(thm)],[c_1037]) ).

cnf(c_461,plain,
    ( multiply(sk_c7,sk_c1) = identity
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_451,c_2]) ).

cnf(c_1038,plain,
    ( multiply(inverse(sk_c7),identity) = sk_c1
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_461,c_44]) ).

cnf(c_526,plain,
    ( inverse(sk_c7) = sk_c1
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_179,c_1038]) ).

cnf(c_534,plain,
    ( multiply(sk_c1,sk_c7) = identity
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_526,c_2]) ).

cnf(c_1039,plain,
    ( identity = sk_c6
    | identity = sk_c6
    | identity = sk_c6 ),
    inference(paramod,[status(thm)],[c_534,c_450]) ).

cnf(c_1040,plain,
    ( identity = sk_c6
    | identity = sk_c6 ),
    inference(copy,[status(thm)],[c_1039]) ).

cnf(c_604,plain,
    identity = sk_c6,
    inference(copy,[status(thm)],[c_1040]) ).

cnf(c_1041,plain,
    inverse(sk_c6) = identity,
    inference(paramod,[status(thm)],[c_604,c_186]) ).

cnf(c_726,plain,
    inverse(sk_c6) = sk_c6,
    inference(paramod,[status(thm)],[c_604,c_1041]) ).

cnf(c_727,plain,
    multiply(A,sk_c6) = A,
    inference(paramod,[status(thm)],[c_604,c_179]) ).

cnf(c_729,plain,
    ( multiply(sk_c7,sk_c2) = sk_c6
    | multiply(sk_c5,sk_c7) = sk_c6 ),
    inference(paramod,[status(thm)],[c_604,c_109]) ).

cnf(c_737,plain,
    multiply(sk_c6,A) = A,
    inference(paramod,[status(thm)],[c_604,c_1]) ).

cnf(c_1042,plain,
    ( multiply(inverse(sk_c6),sk_c5) = sk_c7
    | sk_c7 = sk_c5 ),
    inference(paramod,[status(thm)],[c_727,c_131]) ).

cnf(c_1043,plain,
    ( multiply(sk_c6,sk_c5) = sk_c7
    | sk_c7 = sk_c5 ),
    inference(paramod,[status(thm)],[c_726,c_1042]) ).

cnf(c_1044,plain,
    ( sk_c5 = sk_c7
    | sk_c7 = sk_c5 ),
    inference(paramod,[status(thm)],[c_737,c_1043]) ).

cnf(c_1045,plain,
    ( sk_c5 = sk_c7
    | sk_c5 = sk_c7 ),
    inference(copy,[status(thm)],[c_1044]) ).

cnf(c_744,plain,
    sk_c5 = sk_c7,
    inference(copy,[status(thm)],[c_1045]) ).

cnf(c_1046,plain,
    ( multiply(sk_c7,multiply(sk_c6,sk_c7)) = sk_c6
    | sk_c2 = sk_c7 ),
    inference(paramod,[status(thm)],[c_727,c_347]) ).

cnf(c_751,plain,
    ( multiply(sk_c7,sk_c7) = sk_c6
    | sk_c2 = sk_c7 ),
    inference(paramod,[status(thm)],[c_737,c_1046]) ).

cnf(c_1047,plain,
    ( multiply(inverse(sk_c5),sk_c6) = sk_c7
    | sk_c2 = sk_c7 ),
    inference(paramod,[status(thm)],[c_727,c_170]) ).

cnf(c_1048,plain,
    ( multiply(inverse(sk_c7),sk_c6) = sk_c7
    | sk_c2 = sk_c7 ),
    inference(paramod,[status(thm)],[c_744,c_1047]) ).

cnf(c_757,plain,
    ( inverse(sk_c7) = sk_c7
    | sk_c2 = sk_c7 ),
    inference(paramod,[status(thm)],[c_727,c_1048]) ).

cnf(c_1049,plain,
    ( multiply(inverse(sk_c7),sk_c6) = sk_c7
    | inverse(sk_c2) = sk_c7 ),
    inference(paramod,[status(thm)],[c_744,c_168]) ).

cnf(c_758,plain,
    ( inverse(sk_c7) = sk_c7
    | inverse(sk_c2) = sk_c7 ),
    inference(paramod,[status(thm)],[c_727,c_1049]) ).

cnf(c_1050,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c5 ),
    inference(paramod,[status(thm)],[c_727,c_43]) ).

cnf(c_1051,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c5,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c7 ),
    inference(paramod,[status(thm)],[c_744,c_1050]) ).

cnf(c_1052,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | multiply(sk_c6,sk_c7) != sk_c5
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c7 ),
    inference(paramod,[status(thm)],[c_744,c_1051]) ).

cnf(c_1053,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | sk_c7 != sk_c5
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c7 ),
    inference(paramod,[status(thm)],[c_737,c_1052]) ).

cnf(c_1054,plain,
    ( multiply(sk_c7,sk_c6) != sk_c7
    | sk_c7 != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c7 ),
    inference(paramod,[status(thm)],[c_744,c_1053]) ).

cnf(c_1055,plain,
    ( sk_c7 != sk_c7
    | sk_c7 != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | sk_c7 != sk_c7 ),
    inference(paramod,[status(thm)],[c_727,c_1054]) ).

cnf(c_1056,plain,
    ( sk_c7 != sk_c7
    | sk_c7 != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6 ),
    inference(copy,[status(thm)],[c_1055]) ).

cnf(c_1057,plain,
    ( sk_c7 != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6 ),
    inference(copy,[status(thm)],[c_1056]) ).

cnf(c_1058,plain,
    ( multiply(sk_c7,sk_c7) != sk_c6
    | inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6 ),
    inference(copy,[status(thm)],[c_1057]) ).

cnf(c_782,plain,
    ( inverse(sk_c7) != sk_c7
    | multiply(sk_c7,sk_c7) != sk_c6 ),
    inference(copy,[status(thm)],[c_1058]) ).

cnf(c_804,plain,
    ( multiply(sk_c7,sk_c2) = sk_c6
    | multiply(sk_c7,sk_c7) = sk_c6 ),
    inference(paramod,[status(thm)],[c_744,c_729]) ).

cnf(c_983,plain,
    ( inverse(sk_c7) != sk_c7
    | sk_c2 = sk_c7 ),
    inference(resolve,[status(thm)],[c_751,c_782]) ).

cnf(c_1059,plain,
    ( sk_c2 = sk_c7
    | sk_c2 = sk_c7 ),
    inference(resolve,[status(thm)],[c_983,c_757]) ).

cnf(c_985,plain,
    sk_c2 = sk_c7,
    inference(copy,[status(thm)],[c_1059]) ).

cnf(c_1060,plain,
    ( multiply(sk_c7,sk_c7) = sk_c6
    | multiply(sk_c7,sk_c7) = sk_c6 ),
    inference(paramod,[status(thm)],[c_985,c_804]) ).

cnf(c_1013,plain,
    multiply(sk_c7,sk_c7) = sk_c6,
    inference(copy,[status(thm)],[c_1060]) ).

cnf(c_1061,plain,
    ( inverse(sk_c7) = sk_c7
    | inverse(sk_c7) = sk_c7 ),
    inference(paramod,[status(thm)],[c_985,c_758]) ).

cnf(c_1015,plain,
    inverse(sk_c7) = sk_c7,
    inference(copy,[status(thm)],[c_1061]) ).

cnf(c_1062,plain,
    ( inverse(sk_c7) != sk_c7
    | sk_c6 != sk_c6 ),
    inference(paramod,[status(thm)],[c_1013,c_782]) ).

cnf(c_1063,plain,
    ( sk_c7 != sk_c7
    | sk_c6 != sk_c6 ),
    inference(paramod,[status(thm)],[c_1015,c_1062]) ).

cnf(c_1064,plain,
    sk_c7 != sk_c7,
    inference(copy,[status(thm)],[c_1063]) ).

cnf(c_1028,plain,
    $false,
    inference(copy,[status(thm)],[c_1064]) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02  % Problem  : GRP299-1 : TPTP v9.3.1. Released v2.5.0.
% 0.00/0.03  % Command  : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.09/0.41  % Computer : n002.cluster.edu
% 0.09/0.41  % Model    : x86_64 x86_64
% 0.09/0.41  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.41  % Memory   : 8046.5625MB
% 0.09/0.41  % OS       : Linux 6.8.0-71-generic
% 0.09/0.41  % CPULimit : 300
% 0.09/0.41  % WCLimit  : 300
% 0.09/0.41  % DateTime : Fri Sep 25 14:46:35 UTC 2026
% 0.09/0.41  % CPUTime  : 
% 0.09/0.41  % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.09/0.41  % Process 3538508 was started by sandbox on n002,
% 0.09/0.41  % Fri Sep 25 14:46:35 2026
% 0.09/0.41  % The command was "/export/starexec/sandbox/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p".
% 0.09/0.41  
% 0.09/0.41  % From the command line: assign(max_seconds, 300).
% 2.99/1.39  
% 2.99/1.39  % SZS status Unsatisfiable for theBenchmark
% 2.99/1.39  
% 2.99/1.39  % Proof 1 at 0.30 (+ 0.11) seconds.
% 2.99/1.39  % Length of proof is 54.
% 2.99/1.39  % Level of proof is 21.
% 2.99/1.39  % Maximum clause weight is 51.000.
% 2.99/1.39  % Given clauses 140.
% 2.99/1.39  
% 2.99/1.39  % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------