TSTP Solution File: GRP225-1 by CSE_E---1.5

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : CSE_E---1.5
% Problem  : GRP225-1 : TPTP v8.1.2. Released v2.5.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %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  : 300s
% DateTime : Thu Aug 31 00:17:48 EDT 2023

% Result   : Unsatisfiable 0.46s 0.64s
% Output   : CNFRefutation 0.46s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   29
%            Number of leaves      :   31
% Syntax   : Number of formulae    :  107 (  16 unt;  12 typ;   0 def)
%            Number of atoms       :  250 ( 249 equ)
%            Maximal formula atoms :   12 (   2 avg)
%            Number of connectives :  248 (  93   ~; 155   |;   0   &)
%                                         (   0 <=>;   0  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   13 (   3 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of types       :    1 (   0 usr)
%            Number of type conns  :    3 (   2   >;   1   *;   0   +;   0  <<)
%            Number of predicates  :    2 (   0 usr;   1 prp; 0-2 aty)
%            Number of functors    :   12 (  12 usr;  10 con; 0-2 aty)
%            Number of variables   :   65 (   1 sgn;   0   !;   0   ?;   0   :)

% Comments : 
%------------------------------------------------------------------------------
tff(decl_22,type,
    identity: $i ).

tff(decl_23,type,
    multiply: ( $i * $i ) > $i ).

tff(decl_24,type,
    inverse: $i > $i ).

tff(decl_25,type,
    sk_c1: $i ).

tff(decl_26,type,
    sk_c9: $i ).

tff(decl_27,type,
    sk_c4: $i ).

tff(decl_28,type,
    sk_c8: $i ).

tff(decl_29,type,
    sk_c5: $i ).

tff(decl_30,type,
    sk_c6: $i ).

tff(decl_31,type,
    sk_c7: $i ).

tff(decl_32,type,
    sk_c3: $i ).

tff(decl_33,type,
    sk_c2: $i ).

cnf(associativity,axiom,
    multiply(multiply(X1,X2),X3) = multiply(X1,multiply(X2,X3)),
    file('/export/starexec/sandbox/benchmark/Axioms/GRP004-0.ax',associativity) ).

cnf(left_inverse,axiom,
    multiply(inverse(X1),X1) = identity,
    file('/export/starexec/sandbox/benchmark/Axioms/GRP004-0.ax',left_inverse) ).

cnf(left_identity,axiom,
    multiply(identity,X1) = X1,
    file('/export/starexec/sandbox/benchmark/Axioms/GRP004-0.ax',left_identity) ).

cnf(prove_this_9,negated_conjecture,
    ( multiply(sk_c1,sk_c8) = sk_c9
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_9) ).

cnf(prove_this_8,negated_conjecture,
    ( multiply(sk_c1,sk_c8) = sk_c9
    | inverse(sk_c4) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_8) ).

cnf(prove_this_2,negated_conjecture,
    ( inverse(sk_c1) = sk_c9
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_2) ).

cnf(prove_this_17,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_17) ).

cnf(prove_this_1,negated_conjecture,
    ( inverse(sk_c1) = sk_c9
    | inverse(sk_c4) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_1) ).

cnf(prove_this_16,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_16) ).

cnf(prove_this_18,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | inverse(sk_c5) = sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_18) ).

cnf(prove_this_26,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c6,sk_c7) = sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_26) ).

cnf(prove_this_27,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | inverse(sk_c6) = sk_c7 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_27) ).

cnf(prove_this_33,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | multiply(sk_c6,sk_c7) = sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_33) ).

cnf(prove_this_34,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | inverse(sk_c6) = sk_c7 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_34) ).

cnf(prove_this_24,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_24) ).

cnf(prove_this_25,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | inverse(sk_c5) = sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_25) ).

cnf(prove_this_36,negated_conjecture,
    ( inverse(X1) != sk_c9
    | multiply(X1,sk_c8) != sk_c9
    | multiply(sk_c9,X2) != sk_c8
    | multiply(X3,sk_c9) != X2
    | inverse(X3) != sk_c9
    | inverse(X4) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | multiply(X5,sk_c8) != sk_c9
    | inverse(X5) != sk_c8
    | multiply(X6,X7) != sk_c8
    | inverse(X6) != X7
    | multiply(X7,sk_c9) != sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_36) ).

cnf(prove_this_32,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | inverse(sk_c5) = sk_c8 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_32) ).

cnf(prove_this_31,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this_31) ).

cnf(c_0_19,axiom,
    multiply(multiply(X1,X2),X3) = multiply(X1,multiply(X2,X3)),
    associativity ).

cnf(c_0_20,axiom,
    multiply(inverse(X1),X1) = identity,
    left_inverse ).

cnf(c_0_21,axiom,
    multiply(identity,X1) = X1,
    left_identity ).

cnf(c_0_22,plain,
    multiply(inverse(X1),multiply(X1,X2)) = X2,
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_19,c_0_20]),c_0_21]) ).

cnf(c_0_23,negated_conjecture,
    ( multiply(sk_c1,sk_c8) = sk_c9
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    prove_this_9 ).

cnf(c_0_24,negated_conjecture,
    ( multiply(inverse(sk_c4),sk_c9) = sk_c8
    | multiply(sk_c1,sk_c8) = sk_c9 ),
    inference(spm,[status(thm)],[c_0_22,c_0_23]) ).

cnf(c_0_25,negated_conjecture,
    ( multiply(sk_c1,sk_c8) = sk_c9
    | inverse(sk_c4) = sk_c9 ),
    prove_this_8 ).

cnf(c_0_26,negated_conjecture,
    ( multiply(sk_c1,sk_c8) = sk_c9
    | multiply(sk_c9,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_24,c_0_25]) ).

cnf(c_0_27,negated_conjecture,
    ( multiply(inverse(sk_c1),sk_c9) = sk_c8
    | multiply(sk_c9,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_22,c_0_26]) ).

cnf(c_0_28,negated_conjecture,
    ( inverse(sk_c1) = sk_c9
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    prove_this_2 ).

cnf(c_0_29,negated_conjecture,
    ( multiply(sk_c4,sk_c8) = sk_c9
    | multiply(sk_c9,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_27,c_0_28]) ).

cnf(c_0_30,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    prove_this_17 ).

cnf(c_0_31,negated_conjecture,
    ( multiply(inverse(sk_c4),sk_c9) = sk_c8
    | multiply(sk_c9,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_22,c_0_29]) ).

cnf(c_0_32,negated_conjecture,
    ( inverse(sk_c1) = sk_c9
    | inverse(sk_c4) = sk_c9 ),
    prove_this_1 ).

cnf(c_0_33,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c4,sk_c8) = sk_c9 ),
    prove_this_16 ).

cnf(c_0_34,negated_conjecture,
    ( multiply(inverse(sk_c5),sk_c9) = sk_c8
    | multiply(sk_c9,sk_c3) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_22,c_0_30]) ).

cnf(c_0_35,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | inverse(sk_c5) = sk_c8 ),
    prove_this_18 ).

cnf(c_0_36,negated_conjecture,
    ( multiply(sk_c9,sk_c9) = sk_c8
    | inverse(sk_c1) = sk_c9 ),
    inference(spm,[status(thm)],[c_0_31,c_0_32]) ).

cnf(c_0_37,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c6,sk_c7) = sk_c8 ),
    prove_this_26 ).

cnf(c_0_38,negated_conjecture,
    ( multiply(sk_c4,multiply(sk_c8,X1)) = multiply(sk_c9,X1)
    | multiply(sk_c9,sk_c3) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_19,c_0_33]) ).

cnf(c_0_39,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c8,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_34,c_0_35]) ).

cnf(c_0_40,negated_conjecture,
    multiply(sk_c9,sk_c9) = sk_c8,
    inference(spm,[status(thm)],[c_0_27,c_0_36]) ).

cnf(c_0_41,negated_conjecture,
    ( multiply(inverse(sk_c6),sk_c8) = sk_c7
    | multiply(sk_c2,sk_c9) = sk_c3 ),
    inference(spm,[status(thm)],[c_0_22,c_0_37]) ).

cnf(c_0_42,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | inverse(sk_c6) = sk_c7 ),
    prove_this_27 ).

cnf(c_0_43,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | multiply(sk_c4,sk_c8) = sk_c8 ),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_38,c_0_39]),c_0_40]) ).

cnf(c_0_44,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c7,sk_c8) = sk_c7 ),
    inference(spm,[status(thm)],[c_0_41,c_0_42]) ).

cnf(c_0_45,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | sk_c8 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_33,c_0_43]) ).

cnf(c_0_46,negated_conjecture,
    multiply(inverse(sk_c9),sk_c8) = sk_c9,
    inference(spm,[status(thm)],[c_0_22,c_0_40]) ).

cnf(c_0_47,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c3) = sk_c9
    | multiply(sk_c7,sk_c8) = sk_c7 ),
    inference(spm,[status(thm)],[c_0_22,c_0_44]) ).

cnf(c_0_48,negated_conjecture,
    ( sk_c8 = sk_c9
    | sk_c3 = sk_c9 ),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_22,c_0_45]),c_0_46]) ).

cnf(c_0_49,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c9) = sk_c9
    | multiply(sk_c7,sk_c8) = sk_c7
    | sk_c8 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_47,c_0_48]) ).

cnf(c_0_50,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | multiply(sk_c6,sk_c7) = sk_c8 ),
    prove_this_33 ).

cnf(c_0_51,negated_conjecture,
    ( multiply(sk_c6,sk_c7) = sk_c8
    | multiply(sk_c7,sk_c8) = sk_c7
    | sk_c8 = sk_c9 ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_49,c_0_50]),c_0_40])]) ).

cnf(c_0_52,negated_conjecture,
    ( multiply(inverse(sk_c6),sk_c8) = sk_c7
    | multiply(sk_c7,sk_c8) = sk_c7
    | sk_c8 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_22,c_0_51]) ).

cnf(c_0_53,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | inverse(sk_c6) = sk_c7 ),
    prove_this_34 ).

cnf(c_0_54,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    prove_this_24 ).

cnf(c_0_55,negated_conjecture,
    ( multiply(sk_c7,sk_c8) = sk_c7
    | inverse(sk_c2) = sk_c9
    | sk_c8 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_52,c_0_53]) ).

cnf(c_0_56,negated_conjecture,
    ( multiply(inverse(sk_c5),sk_c9) = sk_c8
    | multiply(sk_c2,sk_c9) = sk_c3 ),
    inference(spm,[status(thm)],[c_0_22,c_0_54]) ).

cnf(c_0_57,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | inverse(sk_c5) = sk_c8 ),
    prove_this_25 ).

cnf(c_0_58,negated_conjecture,
    ( multiply(sk_c7,sk_c8) = sk_c7
    | sk_c8 = sk_c9 ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_49,c_0_55]),c_0_40])]) ).

cnf(c_0_59,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | multiply(sk_c8,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_56,c_0_57]) ).

cnf(c_0_60,negated_conjecture,
    ( multiply(inverse(inverse(sk_c5)),sk_c8) = sk_c9
    | multiply(sk_c2,sk_c9) = sk_c3 ),
    inference(spm,[status(thm)],[c_0_22,c_0_56]) ).

cnf(c_0_61,negated_conjecture,
    ( multiply(sk_c9,sk_c3) = sk_c8
    | sk_c9 = identity ),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_22,c_0_39]),c_0_20]) ).

cnf(c_0_62,negated_conjecture,
    ( sk_c8 = sk_c9
    | sk_c8 = identity ),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_22,c_0_58]),c_0_20]) ).

cnf(c_0_63,negated_conjecture,
    ( inverse(X1) != sk_c9
    | multiply(X1,sk_c8) != sk_c9
    | multiply(sk_c9,X2) != sk_c8
    | multiply(X3,sk_c9) != X2
    | inverse(X3) != sk_c9
    | inverse(X4) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | multiply(X5,sk_c8) != sk_c9
    | inverse(X5) != sk_c8
    | multiply(X6,X7) != sk_c8
    | inverse(X6) != X7
    | multiply(X7,sk_c9) != sk_c8 ),
    prove_this_36 ).

cnf(c_0_64,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c3) = sk_c9
    | multiply(sk_c8,sk_c9) = sk_c8 ),
    inference(spm,[status(thm)],[c_0_22,c_0_59]) ).

cnf(c_0_65,negated_conjecture,
    ( multiply(sk_c2,sk_c9) = sk_c3
    | sk_c9 = identity ),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_60,c_0_57]),c_0_20]) ).

cnf(c_0_66,negated_conjecture,
    ( multiply(inverse(sk_c9),sk_c8) = sk_c3
    | sk_c9 = identity ),
    inference(spm,[status(thm)],[c_0_22,c_0_61]) ).

cnf(c_0_67,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | inverse(sk_c5) = sk_c8 ),
    prove_this_32 ).

cnf(c_0_68,negated_conjecture,
    ( sk_c8 = identity
    | sk_c9 != identity ),
    inference(ef,[status(thm)],[c_0_62]) ).

cnf(c_0_69,negated_conjecture,
    ( multiply(sk_c9,multiply(X1,sk_c9)) != sk_c8
    | multiply(inverse(X2),sk_c9) != sk_c8
    | multiply(X2,inverse(X2)) != sk_c8
    | multiply(X3,sk_c8) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | multiply(X5,sk_c8) != sk_c9
    | inverse(X3) != sk_c8
    | inverse(X4) != sk_c9
    | inverse(X1) != sk_c9
    | inverse(X5) != sk_c9 ),
    inference(er,[status(thm)],[inference(er,[status(thm)],[c_0_63])]) ).

cnf(c_0_70,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c9) = sk_c9
    | multiply(sk_c8,sk_c9) = sk_c8
    | sk_c8 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_64,c_0_48]) ).

cnf(c_0_71,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | multiply(sk_c5,sk_c8) = sk_c9 ),
    prove_this_31 ).

cnf(c_0_72,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c3) = sk_c9
    | sk_c9 = identity ),
    inference(spm,[status(thm)],[c_0_22,c_0_65]) ).

cnf(c_0_73,negated_conjecture,
    ( sk_c9 = identity
    | sk_c3 = sk_c9 ),
    inference(spm,[status(thm)],[c_0_66,c_0_46]) ).

cnf(c_0_74,negated_conjecture,
    ( multiply(sk_c8,sk_c5) = identity
    | inverse(sk_c2) = sk_c9 ),
    inference(spm,[status(thm)],[c_0_20,c_0_67]) ).

cnf(c_0_75,negated_conjecture,
    sk_c8 = identity,
    inference(csr,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_46,c_0_62]),c_0_20]),c_0_68]) ).

cnf(c_0_76,negated_conjecture,
    ( multiply(sk_c9,multiply(X1,multiply(X2,sk_c9))) != sk_c8
    | multiply(inverse(X3),sk_c9) != sk_c8
    | multiply(X3,inverse(X3)) != sk_c8
    | inverse(multiply(X1,X2)) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | multiply(X5,sk_c8) != sk_c9
    | multiply(X6,sk_c8) != sk_c9
    | inverse(X4) != sk_c8
    | inverse(X5) != sk_c9
    | inverse(X6) != sk_c9 ),
    inference(spm,[status(thm)],[c_0_69,c_0_19]) ).

cnf(c_0_77,negated_conjecture,
    ( multiply(sk_c5,sk_c8) = sk_c9
    | multiply(sk_c8,sk_c9) = sk_c8
    | sk_c8 = sk_c9 ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_70,c_0_71]),c_0_40])]) ).

cnf(c_0_78,negated_conjecture,
    ( multiply(inverse(sk_c2),sk_c9) = sk_c9
    | sk_c9 = identity ),
    inference(spm,[status(thm)],[c_0_72,c_0_73]) ).

cnf(c_0_79,negated_conjecture,
    ( inverse(sk_c2) = sk_c9
    | sk_c5 = identity ),
    inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_74,c_0_75]),c_0_21]) ).

cnf(c_0_80,negated_conjecture,
    ( multiply(sk_c9,multiply(X1,identity)) != sk_c8
    | inverse(multiply(X1,inverse(sk_c9))) != sk_c9
    | multiply(inverse(X2),sk_c9) != sk_c8
    | multiply(X2,inverse(X2)) != sk_c8
    | multiply(X3,sk_c8) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | multiply(X5,sk_c8) != sk_c9
    | inverse(X3) != sk_c8
    | inverse(X4) != sk_c9
    | inverse(X5) != sk_c9 ),
    inference(spm,[status(thm)],[c_0_76,c_0_20]) ).

cnf(c_0_81,negated_conjecture,
    ( multiply(sk_c5,identity) = sk_c9
    | sk_c9 = identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_77,c_0_75]),c_0_75]),c_0_21]),c_0_75]),c_0_75])]) ).

cnf(c_0_82,negated_conjecture,
    ( sk_c5 = identity
    | sk_c9 = identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_78,c_0_79]),c_0_40]),c_0_75])]) ).

cnf(c_0_83,plain,
    multiply(inverse(inverse(X1)),X2) = multiply(X1,X2),
    inference(spm,[status(thm)],[c_0_22,c_0_22]) ).

cnf(c_0_84,negated_conjecture,
    ( inverse(multiply(inverse(identity),inverse(sk_c9))) != sk_c9
    | multiply(inverse(X1),sk_c9) != sk_c8
    | multiply(sk_c9,identity) != sk_c8
    | multiply(X1,inverse(X1)) != sk_c8
    | multiply(X2,sk_c8) != sk_c9
    | multiply(X3,sk_c8) != sk_c9
    | multiply(X4,sk_c8) != sk_c9
    | inverse(X2) != sk_c8
    | inverse(X3) != sk_c9
    | inverse(X4) != sk_c9 ),
    inference(spm,[status(thm)],[c_0_80,c_0_20]) ).

cnf(c_0_85,negated_conjecture,
    sk_c9 = identity,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_81,c_0_82]),c_0_21])]) ).

cnf(c_0_86,plain,
    multiply(X1,inverse(X1)) = identity,
    inference(spm,[status(thm)],[c_0_20,c_0_83]) ).

cnf(c_0_87,negated_conjecture,
    ( inverse(multiply(inverse(identity),inverse(identity))) != identity
    | multiply(inverse(X1),identity) != identity
    | multiply(X1,inverse(X1)) != identity
    | multiply(X2,identity) != identity
    | multiply(X3,identity) != identity
    | multiply(X4,identity) != identity
    | inverse(X2) != identity
    | inverse(X3) != identity
    | inverse(X4) != identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_84,c_0_75]),c_0_75]),c_0_75]),c_0_75]),c_0_75]),c_0_75]),c_0_75]),c_0_85]),c_0_85]),c_0_85]),c_0_85]),c_0_21]),c_0_85]),c_0_85]),c_0_85]),c_0_85]),c_0_85])]) ).

cnf(c_0_88,plain,
    multiply(inverse(identity),X1) = X1,
    inference(spm,[status(thm)],[c_0_22,c_0_21]) ).

cnf(c_0_89,plain,
    inverse(identity) = identity,
    inference(spm,[status(thm)],[c_0_21,c_0_86]) ).

cnf(c_0_90,negated_conjecture,
    ( multiply(inverse(X1),identity) != identity
    | multiply(X2,identity) != identity
    | multiply(X3,identity) != identity
    | multiply(X4,identity) != identity
    | inverse(X2) != identity
    | inverse(X3) != identity
    | inverse(X4) != identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_87,c_0_88]),c_0_89]),c_0_89]),c_0_86])]) ).

cnf(c_0_91,negated_conjecture,
    ( multiply(X1,identity) != identity
    | multiply(X2,identity) != identity
    | multiply(X3,identity) != identity
    | inverse(X1) != identity
    | inverse(X2) != identity
    | inverse(X3) != identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_90,c_0_89]),c_0_21])]) ).

cnf(c_0_92,negated_conjecture,
    ( multiply(X1,identity) != identity
    | multiply(X2,identity) != identity
    | inverse(X1) != identity
    | inverse(X2) != identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_91,c_0_20]),c_0_89]),c_0_89])]) ).

cnf(c_0_93,negated_conjecture,
    ( multiply(X1,identity) != identity
    | inverse(X1) != identity ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_92,c_0_20]),c_0_89]),c_0_89])]) ).

cnf(c_0_94,negated_conjecture,
    $false,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_93,c_0_89]),c_0_21])]),
    [proof] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.09  % Problem    : GRP225-1 : TPTP v8.1.2. Released v2.5.0.
% 0.03/0.10  % Command    : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %d %s
% 0.05/0.30  % Computer : n023.cluster.edu
% 0.05/0.30  % Model    : x86_64 x86_64
% 0.05/0.30  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.05/0.30  % Memory   : 8042.1875MB
% 0.05/0.30  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.05/0.30  % CPULimit   : 300
% 0.05/0.30  % WCLimit    : 300
% 0.05/0.30  % DateTime   : Tue Aug 29 01:23:10 EDT 2023
% 0.05/0.30  % CPUTime  : 
% 0.09/0.51  start to proof: theBenchmark
% 0.46/0.64  % Version  : CSE_E---1.5
% 0.46/0.64  % Problem  : theBenchmark.p
% 0.46/0.64  % Proof found
% 0.46/0.64  % SZS status Theorem for theBenchmark.p
% 0.46/0.64  % SZS output start Proof
% See solution above
% 0.46/0.65  % Total time : 0.132000 s
% 0.46/0.65  % SZS output end Proof
% 0.46/0.65  % Total time : 0.133000 s
%------------------------------------------------------------------------------