TSTP Solution File: SET607+3 by CSE_E---1.5

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : CSE_E---1.5
% Problem  : SET607+3 : TPTP v8.1.2. Released v2.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %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  : 300s
% DateTime : Thu Aug 31 14:34:47 EDT 2023

% Result   : Theorem 3.44s 3.60s
% Output   : CNFRefutation 3.44s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   26
%            Number of leaves      :   14
% Syntax   : Number of formulae    :  130 (  72 unt;   8 typ;   0 def)
%            Number of atoms       :  207 (  40 equ)
%            Maximal formula atoms :    7 (   1 avg)
%            Number of connectives :  132 (  47   ~;  68   |;  11   &)
%                                         (   5 <=>;   1  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   10 (   2 avg)
%            Maximal term depth    :    6 (   2 avg)
%            Number of types       :    2 (   0 usr)
%            Number of type conns  :   12 (   6   >;   6   *;   0   +;   0  <<)
%            Number of predicates  :    4 (   2 usr;   1 prp; 0-2 aty)
%            Number of functors    :    6 (   6 usr;   2 con; 0-2 aty)
%            Number of variables   :  349 (  50 sgn;  35   !;   0   ?;   0   :)

% Comments : 
%------------------------------------------------------------------------------
tff(decl_22,type,
    union: ( $i * $i ) > $i ).

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

tff(decl_24,type,
    difference: ( $i * $i ) > $i ).

tff(decl_25,type,
    subset: ( $i * $i ) > $o ).

tff(decl_26,type,
    esk1_2: ( $i * $i ) > $i ).

tff(decl_27,type,
    esk2_2: ( $i * $i ) > $i ).

tff(decl_28,type,
    esk3_0: $i ).

tff(decl_29,type,
    esk4_0: $i ).

fof(difference_defn,axiom,
    ! [X1,X2,X3] :
      ( member(X3,difference(X1,X2))
    <=> ( member(X3,X1)
        & ~ member(X3,X2) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',difference_defn) ).

fof(subset_defn,axiom,
    ! [X1,X2] :
      ( subset(X1,X2)
    <=> ! [X3] :
          ( member(X3,X1)
         => member(X3,X2) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',subset_defn) ).

fof(union_defn,axiom,
    ! [X1,X2,X3] :
      ( member(X3,union(X1,X2))
    <=> ( member(X3,X1)
        | member(X3,X2) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',union_defn) ).

fof(equal_defn,axiom,
    ! [X1,X2] :
      ( X1 = X2
    <=> ( subset(X1,X2)
        & subset(X2,X1) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',equal_defn) ).

fof(commutativity_of_union,axiom,
    ! [X1,X2] : union(X1,X2) = union(X2,X1),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',commutativity_of_union) ).

fof(prove_th79,conjecture,
    ! [X1,X2] : union(X1,difference(X2,X1)) = union(X1,X2),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_th79) ).

fof(c_0_6,plain,
    ! [X1,X2,X3] :
      ( member(X3,difference(X1,X2))
    <=> ( member(X3,X1)
        & ~ member(X3,X2) ) ),
    inference(fof_simplification,[status(thm)],[difference_defn]) ).

fof(c_0_7,plain,
    ! [X7,X8,X9] :
      ( ( member(X9,X7)
        | ~ member(X9,difference(X7,X8)) )
      & ( ~ member(X9,X8)
        | ~ member(X9,difference(X7,X8)) )
      & ( ~ member(X9,X7)
        | member(X9,X8)
        | member(X9,difference(X7,X8)) ) ),
    inference(distribute,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[c_0_6])])]) ).

fof(c_0_8,plain,
    ! [X14,X15,X16,X17,X18] :
      ( ( ~ subset(X14,X15)
        | ~ member(X16,X14)
        | member(X16,X15) )
      & ( member(esk1_2(X17,X18),X17)
        | subset(X17,X18) )
      & ( ~ member(esk1_2(X17,X18),X18)
        | subset(X17,X18) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(fof_nnf,[status(thm)],[subset_defn])])])])])]) ).

cnf(c_0_9,plain,
    ( member(X1,X2)
    | ~ member(X1,difference(X2,X3)) ),
    inference(split_conjunct,[status(thm)],[c_0_7]) ).

cnf(c_0_10,plain,
    ( member(esk1_2(X1,X2),X1)
    | subset(X1,X2) ),
    inference(split_conjunct,[status(thm)],[c_0_8]) ).

cnf(c_0_11,plain,
    ( ~ member(X1,X2)
    | ~ member(X1,difference(X3,X2)) ),
    inference(split_conjunct,[status(thm)],[c_0_7]) ).

fof(c_0_12,plain,
    ! [X4,X5,X6] :
      ( ( ~ member(X6,union(X4,X5))
        | member(X6,X4)
        | member(X6,X5) )
      & ( ~ member(X6,X4)
        | member(X6,union(X4,X5)) )
      & ( ~ member(X6,X5)
        | member(X6,union(X4,X5)) ) ),
    inference(distribute,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[union_defn])])]) ).

cnf(c_0_13,plain,
    ( subset(X1,X2)
    | ~ member(esk1_2(X1,X2),X2) ),
    inference(split_conjunct,[status(thm)],[c_0_8]) ).

cnf(c_0_14,plain,
    ( member(X1,X3)
    | member(X1,difference(X2,X3))
    | ~ member(X1,X2) ),
    inference(split_conjunct,[status(thm)],[c_0_7]) ).

fof(c_0_15,plain,
    ! [X10,X11] :
      ( ( subset(X10,X11)
        | X10 != X11 )
      & ( subset(X11,X10)
        | X10 != X11 )
      & ( ~ subset(X10,X11)
        | ~ subset(X11,X10)
        | X10 = X11 ) ),
    inference(distribute,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[equal_defn])])]) ).

cnf(c_0_16,plain,
    ( subset(difference(X1,X2),X3)
    | member(esk1_2(difference(X1,X2),X3),X1) ),
    inference(spm,[status(thm)],[c_0_9,c_0_10]) ).

cnf(c_0_17,plain,
    ( subset(difference(X1,X2),X3)
    | ~ member(esk1_2(difference(X1,X2),X3),X2) ),
    inference(spm,[status(thm)],[c_0_11,c_0_10]) ).

cnf(c_0_18,plain,
    ( member(X1,union(X2,X3))
    | ~ member(X1,X2) ),
    inference(split_conjunct,[status(thm)],[c_0_12]) ).

cnf(c_0_19,plain,
    ( subset(X1,difference(X2,X3))
    | member(esk1_2(X1,difference(X2,X3)),X3)
    | ~ member(esk1_2(X1,difference(X2,X3)),X2) ),
    inference(spm,[status(thm)],[c_0_13,c_0_14]) ).

cnf(c_0_20,plain,
    ( X1 = X2
    | ~ subset(X1,X2)
    | ~ subset(X2,X1) ),
    inference(split_conjunct,[status(thm)],[c_0_15]) ).

cnf(c_0_21,plain,
    subset(difference(X1,X2),X1),
    inference(spm,[status(thm)],[c_0_13,c_0_16]) ).

cnf(c_0_22,plain,
    ( subset(difference(difference(X1,X2),X3),X4)
    | ~ member(esk1_2(difference(difference(X1,X2),X3),X4),X2) ),
    inference(spm,[status(thm)],[c_0_11,c_0_16]) ).

cnf(c_0_23,plain,
    ( member(X1,union(X3,X2))
    | ~ member(X1,X2) ),
    inference(split_conjunct,[status(thm)],[c_0_12]) ).

cnf(c_0_24,plain,
    ( subset(difference(X1,difference(X2,X3)),X4)
    | member(esk1_2(difference(X1,difference(X2,X3)),X4),X3)
    | ~ member(esk1_2(difference(X1,difference(X2,X3)),X4),X2) ),
    inference(spm,[status(thm)],[c_0_17,c_0_14]) ).

cnf(c_0_25,plain,
    ( subset(difference(difference(X1,X2),X3),X4)
    | member(esk1_2(difference(difference(X1,X2),X3),X4),X1) ),
    inference(spm,[status(thm)],[c_0_9,c_0_16]) ).

cnf(c_0_26,plain,
    ( subset(difference(X1,union(X2,X3)),X4)
    | ~ member(esk1_2(difference(X1,union(X2,X3)),X4),X2) ),
    inference(spm,[status(thm)],[c_0_17,c_0_18]) ).

cnf(c_0_27,plain,
    ( subset(X1,difference(X1,X2))
    | member(esk1_2(X1,difference(X1,X2)),X2) ),
    inference(spm,[status(thm)],[c_0_19,c_0_10]) ).

cnf(c_0_28,plain,
    ( difference(X1,X2) = X1
    | ~ subset(X1,difference(X1,X2)) ),
    inference(spm,[status(thm)],[c_0_20,c_0_21]) ).

cnf(c_0_29,plain,
    subset(difference(X1,X1),X2),
    inference(spm,[status(thm)],[c_0_17,c_0_16]) ).

cnf(c_0_30,plain,
    ( member(X3,X2)
    | ~ subset(X1,X2)
    | ~ member(X3,X1) ),
    inference(split_conjunct,[status(thm)],[c_0_8]) ).

cnf(c_0_31,plain,
    ( subset(difference(difference(X1,union(X2,X3)),X4),X5)
    | ~ member(esk1_2(difference(difference(X1,union(X2,X3)),X4),X5),X3) ),
    inference(spm,[status(thm)],[c_0_22,c_0_23]) ).

cnf(c_0_32,plain,
    ( subset(difference(difference(X1,X2),difference(X1,X3)),X4)
    | member(esk1_2(difference(difference(X1,X2),difference(X1,X3)),X4),X3) ),
    inference(spm,[status(thm)],[c_0_24,c_0_25]) ).

cnf(c_0_33,plain,
    subset(difference(X1,union(X2,X3)),difference(difference(X1,union(X2,X3)),X2)),
    inference(spm,[status(thm)],[c_0_26,c_0_27]) ).

fof(c_0_34,plain,
    ! [X12,X13] : union(X12,X13) = union(X13,X12),
    inference(variable_rename,[status(thm)],[commutativity_of_union]) ).

cnf(c_0_35,plain,
    difference(difference(X1,X1),X2) = difference(X1,X1),
    inference(spm,[status(thm)],[c_0_28,c_0_29]) ).

cnf(c_0_36,plain,
    ( member(X1,X2)
    | ~ member(X1,difference(X3,X3)) ),
    inference(spm,[status(thm)],[c_0_30,c_0_29]) ).

cnf(c_0_37,plain,
    subset(difference(difference(X1,union(X2,X3)),difference(X1,X3)),X4),
    inference(spm,[status(thm)],[c_0_31,c_0_32]) ).

cnf(c_0_38,plain,
    difference(difference(X1,union(X2,X3)),X2) = difference(X1,union(X2,X3)),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_33]),c_0_21])]) ).

cnf(c_0_39,plain,
    union(X1,X2) = union(X2,X1),
    inference(split_conjunct,[status(thm)],[c_0_34]) ).

cnf(c_0_40,plain,
    ~ member(X1,difference(X2,X2)),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_11,c_0_35]),c_0_36]) ).

cnf(c_0_41,plain,
    ( X1 = difference(X2,X2)
    | ~ subset(X1,difference(X2,X2)) ),
    inference(spm,[status(thm)],[c_0_20,c_0_29]) ).

cnf(c_0_42,plain,
    subset(difference(X1,union(X2,difference(X1,X2))),X3),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_37,c_0_38]),c_0_39]) ).

cnf(c_0_43,plain,
    subset(X1,difference(X1,difference(X2,X2))),
    inference(spm,[status(thm)],[c_0_40,c_0_27]) ).

cnf(c_0_44,plain,
    ( member(X1,X2)
    | member(X1,X3)
    | ~ member(X1,union(X2,X3)) ),
    inference(split_conjunct,[status(thm)],[c_0_12]) ).

cnf(c_0_45,plain,
    ( subset(X1,difference(X1,difference(X2,X3)))
    | ~ member(esk1_2(X1,difference(X1,difference(X2,X3))),X3) ),
    inference(spm,[status(thm)],[c_0_11,c_0_27]) ).

cnf(c_0_46,plain,
    ( subset(difference(X1,difference(X1,X2)),X3)
    | member(esk1_2(difference(X1,difference(X1,X2)),X3),X2) ),
    inference(spm,[status(thm)],[c_0_24,c_0_16]) ).

cnf(c_0_47,plain,
    difference(X1,union(X2,difference(X1,X2))) = difference(X3,X3),
    inference(spm,[status(thm)],[c_0_41,c_0_42]) ).

cnf(c_0_48,plain,
    difference(X1,difference(X2,X2)) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_43]),c_0_21])]) ).

cnf(c_0_49,plain,
    ( subset(difference(difference(difference(X1,X2),X3),X4),X5)
    | member(esk1_2(difference(difference(difference(X1,X2),X3),X4),X5),X1) ),
    inference(spm,[status(thm)],[c_0_9,c_0_25]) ).

cnf(c_0_50,plain,
    ( subset(union(X1,X2),X3)
    | member(esk1_2(union(X1,X2),X3),X1)
    | member(esk1_2(union(X1,X2),X3),X2) ),
    inference(spm,[status(thm)],[c_0_44,c_0_10]) ).

cnf(c_0_51,plain,
    ( subset(difference(difference(X1,X2),X3),difference(X1,X4))
    | member(esk1_2(difference(difference(X1,X2),X3),difference(X1,X4)),X4) ),
    inference(spm,[status(thm)],[c_0_19,c_0_25]) ).

cnf(c_0_52,plain,
    subset(X1,difference(X1,difference(X2,X1))),
    inference(spm,[status(thm)],[c_0_45,c_0_10]) ).

cnf(c_0_53,plain,
    ( subset(X1,X2)
    | member(esk1_2(X1,X2),union(X3,difference(X1,X3))) ),
    inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_46,c_0_47]),c_0_48]),c_0_48]) ).

cnf(c_0_54,plain,
    ( subset(difference(difference(difference(X1,X2),X3),difference(X1,X4)),X5)
    | member(esk1_2(difference(difference(difference(X1,X2),X3),difference(X1,X4)),X5),X4) ),
    inference(spm,[status(thm)],[c_0_24,c_0_49]) ).

cnf(c_0_55,plain,
    subset(difference(difference(X1,X2),X3),difference(difference(difference(X1,X2),X3),X2)),
    inference(spm,[status(thm)],[c_0_22,c_0_27]) ).

cnf(c_0_56,plain,
    ( subset(union(X1,X2),X2)
    | member(esk1_2(union(X1,X2),X2),X1) ),
    inference(spm,[status(thm)],[c_0_13,c_0_50]) ).

cnf(c_0_57,plain,
    ( subset(X1,union(X2,X3))
    | ~ member(esk1_2(X1,union(X2,X3)),X3) ),
    inference(spm,[status(thm)],[c_0_13,c_0_23]) ).

cnf(c_0_58,plain,
    subset(difference(difference(X1,X2),X3),difference(X1,X3)),
    inference(spm,[status(thm)],[c_0_17,c_0_51]) ).

cnf(c_0_59,plain,
    difference(X1,difference(X2,X1)) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_52]),c_0_21])]) ).

cnf(c_0_60,plain,
    subset(X1,difference(X1,difference(X2,union(X3,difference(X1,X3))))),
    inference(spm,[status(thm)],[c_0_45,c_0_53]) ).

cnf(c_0_61,plain,
    subset(difference(difference(difference(X1,X2),X3),difference(X1,X3)),X4),
    inference(spm,[status(thm)],[c_0_22,c_0_54]) ).

cnf(c_0_62,plain,
    difference(difference(difference(X1,X2),X3),X2) = difference(difference(X1,X2),X3),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_55]),c_0_21])]) ).

cnf(c_0_63,plain,
    subset(union(difference(X1,X1),X2),X2),
    inference(spm,[status(thm)],[c_0_40,c_0_56]) ).

cnf(c_0_64,plain,
    subset(X1,union(X2,X1)),
    inference(spm,[status(thm)],[c_0_57,c_0_10]) ).

cnf(c_0_65,plain,
    subset(difference(X1,X2),difference(X1,difference(X3,difference(X1,X2)))),
    inference(spm,[status(thm)],[c_0_58,c_0_59]) ).

cnf(c_0_66,plain,
    difference(X1,difference(X2,union(X3,difference(X1,X3)))) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_60]),c_0_21])]) ).

cnf(c_0_67,plain,
    subset(difference(difference(X1,difference(X1,X2)),X2),X3),
    inference(spm,[status(thm)],[c_0_61,c_0_62]) ).

cnf(c_0_68,plain,
    union(difference(X1,X1),X2) = X2,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_63]),c_0_64])]) ).

cnf(c_0_69,plain,
    ( subset(difference(difference(union(X1,X2),X3),X4),X5)
    | member(esk1_2(difference(difference(union(X1,X2),X3),X4),X5),X1)
    | member(esk1_2(difference(difference(union(X1,X2),X3),X4),X5),X2) ),
    inference(spm,[status(thm)],[c_0_44,c_0_25]) ).

cnf(c_0_70,plain,
    subset(difference(X1,union(X2,difference(X3,X2))),difference(X1,X3)),
    inference(spm,[status(thm)],[c_0_65,c_0_66]) ).

cnf(c_0_71,plain,
    difference(difference(X1,difference(X1,X2)),X2) = difference(X3,X3),
    inference(spm,[status(thm)],[c_0_41,c_0_67]) ).

cnf(c_0_72,plain,
    union(X1,difference(X2,X2)) = X1,
    inference(spm,[status(thm)],[c_0_39,c_0_68]) ).

cnf(c_0_73,plain,
    ( subset(X1,union(X2,X3))
    | ~ member(esk1_2(X1,union(X2,X3)),X2) ),
    inference(spm,[status(thm)],[c_0_13,c_0_18]) ).

cnf(c_0_74,plain,
    ( subset(X1,union(X2,difference(X3,X4)))
    | member(esk1_2(X1,union(X2,difference(X3,X4))),X4)
    | ~ member(esk1_2(X1,union(X2,difference(X3,X4))),X3) ),
    inference(spm,[status(thm)],[c_0_57,c_0_14]) ).

cnf(c_0_75,plain,
    subset(difference(difference(X1,X2),X1),X3),
    inference(spm,[status(thm)],[c_0_17,c_0_25]) ).

cnf(c_0_76,plain,
    ( subset(difference(difference(union(X1,X2),X2),X3),X4)
    | member(esk1_2(difference(difference(union(X1,X2),X2),X3),X4),X1) ),
    inference(spm,[status(thm)],[c_0_22,c_0_69]) ).

cnf(c_0_77,plain,
    subset(difference(X1,X2),difference(X1,difference(X3,difference(X3,X2)))),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_70,c_0_71]),c_0_72]) ).

cnf(c_0_78,plain,
    ( subset(X1,union(union(X2,X3),X4))
    | ~ member(esk1_2(X1,union(union(X2,X3),X4)),X3) ),
    inference(spm,[status(thm)],[c_0_73,c_0_23]) ).

cnf(c_0_79,plain,
    ( subset(difference(X1,X2),union(X3,difference(X1,X4)))
    | member(esk1_2(difference(X1,X2),union(X3,difference(X1,X4))),X4) ),
    inference(spm,[status(thm)],[c_0_74,c_0_16]) ).

cnf(c_0_80,plain,
    difference(difference(difference(X1,X2),X1),X3) = difference(difference(X1,X2),X1),
    inference(spm,[status(thm)],[c_0_28,c_0_75]) ).

cnf(c_0_81,plain,
    subset(difference(difference(union(X1,X2),X2),X1),X3),
    inference(spm,[status(thm)],[c_0_17,c_0_76]) ).

cnf(c_0_82,plain,
    subset(X1,difference(X1,difference(X2,difference(X2,difference(X3,X1))))),
    inference(spm,[status(thm)],[c_0_77,c_0_59]) ).

cnf(c_0_83,plain,
    ( subset(difference(union(X1,X2),X3),X4)
    | member(esk1_2(difference(union(X1,X2),X3),X4),X1)
    | member(esk1_2(difference(union(X1,X2),X3),X4),X2) ),
    inference(spm,[status(thm)],[c_0_44,c_0_16]) ).

cnf(c_0_84,plain,
    subset(difference(X1,X2),union(union(X3,X4),difference(X1,X4))),
    inference(spm,[status(thm)],[c_0_78,c_0_79]) ).

cnf(c_0_85,plain,
    difference(X1,difference(difference(X2,X3),X2)) = X1,
    inference(spm,[status(thm)],[c_0_48,c_0_80]) ).

cnf(c_0_86,plain,
    difference(difference(union(X1,X2),X2),X1) = difference(X3,X3),
    inference(spm,[status(thm)],[c_0_41,c_0_81]) ).

cnf(c_0_87,plain,
    difference(X1,difference(X2,difference(X2,difference(X3,X1)))) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_82]),c_0_21])]) ).

cnf(c_0_88,plain,
    ( subset(difference(union(X1,X2),X3),union(X4,X2))
    | member(esk1_2(difference(union(X1,X2),X3),union(X4,X2)),X1) ),
    inference(spm,[status(thm)],[c_0_57,c_0_83]) ).

cnf(c_0_89,plain,
    subset(X1,union(union(X2,X3),difference(X1,X3))),
    inference(spm,[status(thm)],[c_0_84,c_0_85]) ).

cnf(c_0_90,plain,
    union(difference(difference(union(X1,X2),X2),X1),X3) = X3,
    inference(spm,[status(thm)],[c_0_68,c_0_86]) ).

cnf(c_0_91,plain,
    difference(difference(X1,X2),difference(X3,difference(X3,X2))) = difference(X1,X2),
    inference(spm,[status(thm)],[c_0_87,c_0_59]) ).

cnf(c_0_92,plain,
    subset(difference(union(X1,X2),X3),union(union(X4,X1),X2)),
    inference(spm,[status(thm)],[c_0_78,c_0_88]) ).

cnf(c_0_93,plain,
    subset(X1,union(difference(X1,X2),union(X3,X2))),
    inference(spm,[status(thm)],[c_0_89,c_0_39]) ).

cnf(c_0_94,plain,
    union(difference(union(X1,difference(X2,difference(X2,X1))),X1),X3) = X3,
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_90,c_0_91]),c_0_39]) ).

cnf(c_0_95,plain,
    difference(X1,difference(difference(X2,X1),X3)) = X1,
    inference(spm,[status(thm)],[c_0_59,c_0_62]) ).

cnf(c_0_96,plain,
    subset(union(X1,X2),union(union(X3,X1),X2)),
    inference(spm,[status(thm)],[c_0_92,c_0_85]) ).

cnf(c_0_97,plain,
    ( subset(X1,union(X2,union(X3,X4)))
    | ~ member(esk1_2(X1,union(X2,union(X3,X4))),X3) ),
    inference(spm,[status(thm)],[c_0_57,c_0_18]) ).

cnf(c_0_98,plain,
    subset(union(X1,difference(X2,difference(X2,X1))),union(X3,X1)),
    inference(spm,[status(thm)],[c_0_93,c_0_94]) ).

cnf(c_0_99,plain,
    union(difference(difference(X1,X2),X1),X3) = X3,
    inference(spm,[status(thm)],[c_0_68,c_0_80]) ).

cnf(c_0_100,plain,
    difference(difference(X1,X2),difference(X2,X3)) = difference(X1,X2),
    inference(spm,[status(thm)],[c_0_95,c_0_59]) ).

cnf(c_0_101,plain,
    subset(union(X1,X2),union(union(X1,X3),X2)),
    inference(spm,[status(thm)],[c_0_96,c_0_39]) ).

cnf(c_0_102,plain,
    subset(union(X1,union(X2,union(X1,X3))),union(X2,union(X1,X3))),
    inference(spm,[status(thm)],[c_0_97,c_0_56]) ).

cnf(c_0_103,plain,
    subset(union(X1,difference(X2,difference(X2,X1))),X1),
    inference(spm,[status(thm)],[c_0_98,c_0_99]) ).

cnf(c_0_104,plain,
    subset(X1,union(X1,X2)),
    inference(spm,[status(thm)],[c_0_64,c_0_39]) ).

cnf(c_0_105,plain,
    subset(difference(X1,difference(X1,X2)),X2),
    inference(spm,[status(thm)],[c_0_13,c_0_46]) ).

cnf(c_0_106,plain,
    difference(union(X1,difference(X1,X2)),X1) = difference(X3,X3),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_86,c_0_100]),c_0_39]) ).

cnf(c_0_107,plain,
    subset(union(X1,X2),union(X2,union(X1,X3))),
    inference(spm,[status(thm)],[c_0_101,c_0_39]) ).

cnf(c_0_108,plain,
    union(X1,union(X2,union(X1,X3))) = union(X2,union(X1,X3)),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_102]),c_0_64])]) ).

cnf(c_0_109,plain,
    union(X1,difference(X2,difference(X2,X1))) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_103]),c_0_104])]) ).

cnf(c_0_110,plain,
    subset(union(X1,difference(X1,X2)),X1),
    inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_105,c_0_106]),c_0_48]) ).

fof(c_0_111,negated_conjecture,
    ~ ! [X1,X2] : union(X1,difference(X2,X1)) = union(X1,X2),
    inference(assume_negation,[status(cth)],[prove_th79]) ).

cnf(c_0_112,plain,
    subset(union(X1,X2),union(X1,union(X2,X3))),
    inference(spm,[status(thm)],[c_0_107,c_0_108]) ).

cnf(c_0_113,plain,
    union(X1,union(X2,difference(X1,X2))) = union(X2,difference(X1,X2)),
    inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_109,c_0_47]),c_0_48]),c_0_39]) ).

cnf(c_0_114,plain,
    subset(union(X1,X2),union(union(X3,X2),X1)),
    inference(spm,[status(thm)],[c_0_96,c_0_39]) ).

cnf(c_0_115,plain,
    union(X1,difference(X1,X2)) = X1,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_110]),c_0_104])]) ).

fof(c_0_116,negated_conjecture,
    union(esk3_0,difference(esk4_0,esk3_0)) != union(esk3_0,esk4_0),
    inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[c_0_111])])]) ).

cnf(c_0_117,plain,
    subset(union(X1,X2),union(X2,difference(X1,X2))),
    inference(spm,[status(thm)],[c_0_112,c_0_113]) ).

cnf(c_0_118,plain,
    subset(union(X1,difference(X2,X3)),union(X2,X1)),
    inference(spm,[status(thm)],[c_0_114,c_0_115]) ).

cnf(c_0_119,negated_conjecture,
    union(esk3_0,difference(esk4_0,esk3_0)) != union(esk3_0,esk4_0),
    inference(split_conjunct,[status(thm)],[c_0_116]) ).

cnf(c_0_120,plain,
    union(X1,difference(X2,X1)) = union(X2,X1),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_20,c_0_117]),c_0_118])]) ).

cnf(c_0_121,negated_conjecture,
    $false,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_119,c_0_120]),c_0_39])]),
    [proof] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem    : SET607+3 : TPTP v8.1.2. Released v2.2.0.
% 0.07/0.13  % Command    : java -jar /export/starexec/sandbox/solver/bin/mcs_scs.jar %d %s
% 0.12/0.34  % Computer : n015.cluster.edu
% 0.12/0.34  % Model    : x86_64 x86_64
% 0.12/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.34  % Memory   : 8042.1875MB
% 0.12/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.34  % CPULimit   : 300
% 0.19/0.34  % WCLimit    : 300
% 0.19/0.34  % DateTime   : Sat Aug 26 12:57:38 EDT 2023
% 0.19/0.34  % CPUTime  : 
% 0.19/0.56  start to proof: theBenchmark
% 3.44/3.60  % Version  : CSE_E---1.5
% 3.44/3.60  % Problem  : theBenchmark.p
% 3.44/3.60  % Proof found
% 3.44/3.60  % SZS status Theorem for theBenchmark.p
% 3.44/3.60  % SZS output start Proof
% See solution above
% 3.44/3.61  % Total time : 3.035000 s
% 3.44/3.61  % SZS output end Proof
% 3.44/3.61  % Total time : 3.037000 s
%------------------------------------------------------------------------------