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CSE_E---1.7.THM-CRf.s

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%------------------------------------------------------------------------------
% File     : CSE_E---1.7
% Problem  : SWC421+1 : TPTP v9.2.1. Released v2.4.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : /export/starexec/sandbox2/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox2/solver/bin/cse --final-prover /export/starexec/sandbox2/solver/bin/eprover --proof-time %d --global-time-limit %d

% Computer : n019.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 : Tue May  5 05:19:36 PM UTC 2026

% Result   : Theorem 15.74s 9.73s
% Output   : CNFRefutation 15.74s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   32
%            Number of leaves      :   24
% Syntax   : Number of formulae    :  157 (  15 unt;   0 def)
%            Number of atoms       :  618 ( 233 equ)
%            Maximal formula atoms :   28 (   3 avg)
%            Number of connectives :  768 ( 307   ~; 343   |;  59   &)
%                                         (   5 <=>;  54  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   31 (   5 avg)
%            Maximal term depth    :    6 (   1 avg)
%            Number of predicates  :    7 (   5 usr;   1 prp; 0-2 aty)
%            Number of functors    :   13 (  13 usr;   5 con; 0-2 aty)
%            Number of variables   :  224 (   0 sgn  97   !;  18   ?)

% Comments : 
%------------------------------------------------------------------------------
fof(co1,conjecture,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ! [X3] :
              ( ssList(X3)
             => ! [X4] :
                  ( ssList(X4)
                 => ( X2 != X4
                    | X1 != X3
                    | ~ neq(X2,nil)
                    | ? [X5] :
                        ( ssItem(X5)
                        & ? [X6] :
                            ( ssList(X6)
                            & ? [X7] :
                                ( ssList(X7)
                                & app(app(X6,cons(X5,nil)),X7) = X2
                                & app(app(X7,cons(X5,nil)),X6) = X1 ) ) )
                    | ( nil != X3
                      & nil = X4 )
                    | ( neq(X4,nil)
                      & ( ~ neq(X3,nil)
                        | ? [X8] :
                            ( ssList(X8)
                            & X4 != X8
                            & ? [X9] :
                                ( ssList(X9)
                                & ? [X10] :
                                    ( ssList(X10)
                                    & tl(X3) = X9
                                    & app(X9,X10) = X8
                                    & ? [X11] :
                                        ( ssItem(X11)
                                        & cons(X11,nil) = X10
                                        & hd(X3) = X11
                                        & neq(nil,X3) )
                                    & neq(nil,X3) ) ) ) ) ) ) ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/theBenchmark.p',co1) ).

fof(ax26,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ssList(app(X1,X2)) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax26) ).

fof(ax24,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( nil != X1
       => ssList(tl(X1)) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax24) ).

fof(ax16,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => ssList(cons(X2,X1)) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax16) ).

fof(ax17,axiom,
    ssList(nil),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax17) ).

fof(ax22,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( nil != X1
       => ssItem(hd(X1)) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax22) ).

fof(ax78,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( nil != X1
       => cons(hd(X1),tl(X1)) = X1 ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax78) ).

fof(ax86,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ( nil != X1
           => tl(app(X1,X2)) = app(tl(X1),X2) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax86) ).

fof(ax83,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ( nil = app(X1,X2)
          <=> ( nil = X2
              & nil = X1 ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax83) ).

fof(ax15,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ( neq(X1,X2)
          <=> X1 != X2 ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax15) ).

fof(ax85,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ( nil != X1
           => hd(app(X1,X2)) = hd(X1) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax85) ).

fof(ax21,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => nil != cons(X2,X1) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax21) ).

fof(ax5,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ( frontsegP(X1,X2)
          <=> ? [X3] :
                ( ssList(X3)
                & app(X2,X3) = X1 ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax5) ).

fof(ax23,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => hd(cons(X2,X1)) = X2 ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax23) ).

fof(ax44,axiom,
    ! [X1] :
      ( ssItem(X1)
     => ! [X2] :
          ( ssItem(X2)
         => ! [X3] :
              ( ssList(X3)
             => ! [X4] :
                  ( ssList(X4)
                 => ( frontsegP(cons(X1,X3),cons(X2,X4))
                  <=> ( X1 = X2
                      & frontsegP(X3,X4) ) ) ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax44) ).

fof(ax20,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( nil = X1
        | ? [X2] :
            ( ssList(X2)
            & ? [X3] :
                ( ssItem(X3)
                & cons(X3,X2) = X1 ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax20) ).

fof(ax42,axiom,
    ! [X1] :
      ( ssList(X1)
     => frontsegP(X1,X1) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax42) ).

fof(ax80,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ! [X3] :
              ( ssList(X3)
             => ( app(X2,X3) = app(X2,X1)
               => X3 = X1 ) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax80) ).

fof(ax84,axiom,
    ! [X1] :
      ( ssList(X1)
     => app(X1,nil) = X1 ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax84) ).

fof(ax4,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( singletonP(X1)
      <=> ? [X2] :
            ( ssItem(X2)
            & cons(X2,nil) = X1 ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax4) ).

fof(ax27,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ! [X3] :
              ( ssItem(X3)
             => cons(X3,app(X2,X1)) = app(cons(X3,X2),X1) ) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax27) ).

fof(ax28,axiom,
    ! [X1] :
      ( ssList(X1)
     => app(nil,X1) = X1 ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax28) ).

fof(ax25,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => tl(cons(X2,X1)) = X1 ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax25) ).

fof(ax81,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => cons(X2,X1) = app(cons(X2,nil),X1) ) ),
    file('/export/starexec/sandbox2/benchmark/Axioms/SWC001+0.ax',ax81) ).

fof(c_0_24,negated_conjecture,
    ~ ! [X1] :
        ( ssList(X1)
       => ! [X2] :
            ( ssList(X2)
           => ! [X3] :
                ( ssList(X3)
               => ! [X4] :
                    ( ssList(X4)
                   => ( X2 != X4
                      | X1 != X3
                      | ~ neq(X2,nil)
                      | ? [X5] :
                          ( ssItem(X5)
                          & ? [X6] :
                              ( ssList(X6)
                              & ? [X7] :
                                  ( ssList(X7)
                                  & app(app(X6,cons(X5,nil)),X7) = X2
                                  & app(app(X7,cons(X5,nil)),X6) = X1 ) ) )
                      | ( nil != X3
                        & nil = X4 )
                      | ( neq(X4,nil)
                        & ( ~ neq(X3,nil)
                          | ? [X8] :
                              ( ssList(X8)
                              & X4 != X8
                              & ? [X9] :
                                  ( ssList(X9)
                                  & ? [X10] :
                                      ( ssList(X10)
                                      & tl(X3) = X9
                                      & app(X9,X10) = X8
                                      & ? [X11] :
                                          ( ssItem(X11)
                                          & cons(X11,nil) = X10
                                          & hd(X3) = X11
                                          & neq(nil,X3) )
                                      & neq(nil,X3) ) ) ) ) ) ) ) ) ) ),
    inference(fof_simplification,[status(thm)],[inference(assume_negation,[status(cth)],[co1])]) ).

fof(c_0_25,negated_conjecture,
    ! [X474,X475,X476,X477,X478,X479,X480] :
      ( ssList(esk48_0)
      & ssList(esk49_0)
      & ssList(esk50_0)
      & ssList(esk51_0)
      & esk49_0 = esk51_0
      & esk48_0 = esk50_0
      & neq(esk49_0,nil)
      & ( ~ ssItem(X474)
        | ~ ssList(X475)
        | ~ ssList(X476)
        | app(app(X475,cons(X474,nil)),X476) != esk49_0
        | app(app(X476,cons(X474,nil)),X475) != esk48_0 )
      & ( nil = esk50_0
        | nil != esk51_0 )
      & ( neq(esk50_0,nil)
        | ~ neq(esk51_0,nil) )
      & ( ~ ssList(X477)
        | esk51_0 = X477
        | ~ ssList(X478)
        | ~ ssList(X479)
        | tl(esk50_0) != X478
        | app(X478,X479) != X477
        | ~ ssItem(X480)
        | cons(X480,nil) != X479
        | hd(esk50_0) != X480
        | ~ neq(nil,esk50_0)
        | ~ neq(nil,esk50_0)
        | ~ neq(esk51_0,nil) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[c_0_24])])])])]) ).

cnf(c_0_26,negated_conjecture,
    ( esk51_0 = X1
    | ~ ssList(X1)
    | ~ ssList(X2)
    | ~ ssList(X3)
    | tl(esk50_0) != X2
    | app(X2,X3) != X1
    | ~ ssItem(X4)
    | cons(X4,nil) != X3
    | hd(esk50_0) != X4
    | ~ neq(nil,esk50_0)
    | ~ neq(nil,esk50_0)
    | ~ neq(esk51_0,nil) ),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_27,negated_conjecture,
    neq(esk49_0,nil),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_28,negated_conjecture,
    esk49_0 = esk51_0,
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

fof(c_0_29,plain,
    ! [X349,X350] :
      ( ~ ssList(X349)
      | ~ ssList(X350)
      | ssList(app(X349,X350)) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax26])])]) ).

cnf(c_0_30,negated_conjecture,
    ( esk51_0 = X1
    | hd(esk50_0) != X4
    | tl(esk50_0) != X2
    | app(X2,X3) != X1
    | cons(X4,nil) != X3
    | ~ ssItem(X4)
    | ~ ssList(X3)
    | ~ ssList(X2)
    | ~ ssList(X1)
    | ~ neq(nil,esk50_0)
    | ~ neq(esk51_0,nil) ),
    inference(cn,[status(thm)],[c_0_26]) ).

cnf(c_0_31,negated_conjecture,
    neq(esk51_0,nil),
    inference(rw,[status(thm)],[c_0_27,c_0_28]) ).

cnf(c_0_32,plain,
    ( ssList(app(X1,X2))
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_29]) ).

fof(c_0_33,plain,
    ! [X346] :
      ( ~ ssList(X346)
      | nil = X346
      | ssList(tl(X346)) ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax24])]) ).

cnf(c_0_34,negated_conjecture,
    ssList(esk48_0),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_35,negated_conjecture,
    esk48_0 = esk50_0,
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_36,negated_conjecture,
    ( app(tl(esk50_0),cons(hd(esk50_0),nil)) = esk51_0
    | ~ ssList(cons(hd(esk50_0),nil))
    | ~ ssList(tl(esk50_0))
    | ~ neq(nil,esk50_0)
    | ~ ssItem(hd(esk50_0)) ),
    inference(csr,[status(thm)],[inference(er,[status(thm)],[inference(er,[status(thm)],[inference(er,[status(thm)],[inference(er,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_30,c_0_31])])])])])]),c_0_32]) ).

cnf(c_0_37,plain,
    ( nil = X1
    | ssList(tl(X1))
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_33]) ).

cnf(c_0_38,negated_conjecture,
    ssList(esk50_0),
    inference(rw,[status(thm)],[c_0_34,c_0_35]) ).

fof(c_0_39,plain,
    ! [X330,X331] :
      ( ~ ssList(X330)
      | ~ ssItem(X331)
      | ssList(cons(X331,X330)) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax16])])]) ).

cnf(c_0_40,negated_conjecture,
    ( app(tl(esk50_0),cons(hd(esk50_0),nil)) = esk51_0
    | esk50_0 = nil
    | ~ ssList(cons(hd(esk50_0),nil))
    | ~ neq(nil,esk50_0)
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_36,c_0_37]),c_0_38])]) ).

cnf(c_0_41,plain,
    ( ssList(cons(X2,X1))
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_39]) ).

cnf(c_0_42,plain,
    ssList(nil),
    inference(split_conjunct,[status(thm)],[ax17]) ).

fof(c_0_43,plain,
    ! [X343] :
      ( ~ ssList(X343)
      | nil = X343
      | ssItem(hd(X343)) ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax22])]) ).

fof(c_0_44,plain,
    ! [X432] :
      ( ~ ssList(X432)
      | nil = X432
      | cons(hd(X432),tl(X432)) = X432 ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax78])]) ).

fof(c_0_45,plain,
    ! [X449,X450] :
      ( ~ ssList(X449)
      | ~ ssList(X450)
      | nil = X449
      | tl(app(X449,X450)) = app(tl(X449),X450) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax86])])]) ).

fof(c_0_46,plain,
    ! [X444,X445] :
      ( ( nil = X445
        | nil != app(X444,X445)
        | ~ ssList(X445)
        | ~ ssList(X444) )
      & ( nil = X444
        | nil != app(X444,X445)
        | ~ ssList(X445)
        | ~ ssList(X444) )
      & ( nil != X445
        | nil != X444
        | nil = app(X444,X445)
        | ~ ssList(X445)
        | ~ ssList(X444) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax83])])])]) ).

cnf(c_0_47,negated_conjecture,
    ( app(tl(esk50_0),cons(hd(esk50_0),nil)) = esk51_0
    | esk50_0 = nil
    | ~ neq(nil,esk50_0)
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_40,c_0_41]),c_0_42])]) ).

cnf(c_0_48,plain,
    ( nil = X1
    | ssItem(hd(X1))
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_43]) ).

fof(c_0_49,plain,
    ! [X328,X329] :
      ( ( ~ neq(X328,X329)
        | X328 != X329
        | ~ ssList(X329)
        | ~ ssList(X328) )
      & ( X328 = X329
        | neq(X328,X329)
        | ~ ssList(X329)
        | ~ ssList(X328) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax15])])])]) ).

cnf(c_0_50,plain,
    ( nil = X1
    | cons(hd(X1),tl(X1)) = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_44]) ).

cnf(c_0_51,plain,
    ( nil = X1
    | tl(app(X1,X2)) = app(tl(X1),X2)
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_45]) ).

cnf(c_0_52,plain,
    ( nil = X1
    | nil != app(X1,X2)
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_46]) ).

cnf(c_0_53,negated_conjecture,
    ( app(tl(esk50_0),cons(hd(esk50_0),nil)) = esk51_0
    | esk50_0 = nil
    | ~ neq(nil,esk50_0) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_47,c_0_48]),c_0_38])]) ).

cnf(c_0_54,plain,
    ( X1 = X2
    | neq(X1,X2)
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_49]) ).

cnf(c_0_55,plain,
    ( cons(hd(app(X1,X2)),app(tl(X1),X2)) = app(X1,X2)
    | nil = X1
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_50,c_0_51]),c_0_32]),c_0_52]) ).

cnf(c_0_56,negated_conjecture,
    ( app(tl(esk50_0),cons(hd(esk50_0),nil)) = esk51_0
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_53,c_0_54]),c_0_38]),c_0_42])]) ).

cnf(c_0_57,negated_conjecture,
    ( cons(hd(app(esk50_0,cons(hd(esk50_0),nil))),esk51_0) = app(esk50_0,cons(hd(esk50_0),nil))
    | esk50_0 = nil
    | ~ ssList(cons(hd(esk50_0),nil)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_55,c_0_56]),c_0_38])]) ).

cnf(c_0_58,negated_conjecture,
    ( cons(hd(app(esk50_0,cons(hd(esk50_0),nil))),esk51_0) = app(esk50_0,cons(hd(esk50_0),nil))
    | esk50_0 = nil
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_57,c_0_41]),c_0_42])]) ).

fof(c_0_59,plain,
    ! [X447,X448] :
      ( ~ ssList(X447)
      | ~ ssList(X448)
      | nil = X447
      | hd(app(X447,X448)) = hd(X447) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax85])])]) ).

cnf(c_0_60,negated_conjecture,
    ( cons(hd(app(esk50_0,cons(hd(esk50_0),nil))),esk51_0) = app(esk50_0,cons(hd(esk50_0),nil))
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_58,c_0_48]),c_0_38])]) ).

cnf(c_0_61,plain,
    ( nil = X1
    | hd(app(X1,X2)) = hd(X1)
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_59]) ).

fof(c_0_62,plain,
    ! [X341,X342] :
      ( ~ ssList(X341)
      | ~ ssItem(X342)
      | nil != cons(X342,X341) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax21])])]) ).

cnf(c_0_63,negated_conjecture,
    ssList(esk49_0),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_64,negated_conjecture,
    ( app(esk50_0,cons(hd(esk50_0),nil)) = cons(hd(esk50_0),esk51_0)
    | esk50_0 = nil
    | ~ ssList(cons(hd(esk50_0),nil)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_60,c_0_61]),c_0_38])]) ).

cnf(c_0_65,plain,
    ( ~ ssList(X1)
    | ~ ssItem(X2)
    | nil != cons(X2,X1) ),
    inference(split_conjunct,[status(thm)],[c_0_62]) ).

cnf(c_0_66,negated_conjecture,
    ssList(esk51_0),
    inference(rw,[status(thm)],[c_0_63,c_0_28]) ).

cnf(c_0_67,negated_conjecture,
    ( app(esk50_0,cons(hd(esk50_0),nil)) = cons(hd(esk50_0),esk51_0)
    | esk50_0 = nil
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_64,c_0_41]),c_0_42])]) ).

cnf(c_0_68,negated_conjecture,
    ( esk50_0 = nil
    | app(esk50_0,cons(hd(esk50_0),nil)) != nil
    | ~ ssItem(hd(app(esk50_0,cons(hd(esk50_0),nil)))) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_65,c_0_60]),c_0_66])]) ).

cnf(c_0_69,negated_conjecture,
    ( app(esk50_0,cons(hd(esk50_0),nil)) = cons(hd(esk50_0),esk51_0)
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_67,c_0_48]),c_0_38])]) ).

cnf(c_0_70,negated_conjecture,
    ( esk50_0 = nil
    | app(esk50_0,cons(hd(esk50_0),nil)) != nil
    | ~ ssList(cons(hd(esk50_0),nil))
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_68,c_0_61]),c_0_38])]) ).

fof(c_0_71,plain,
    ! [X239,X240,X242] :
      ( ( ssList(esk6_2(X239,X240))
        | ~ frontsegP(X239,X240)
        | ~ ssList(X240)
        | ~ ssList(X239) )
      & ( app(X240,esk6_2(X239,X240)) = X239
        | ~ frontsegP(X239,X240)
        | ~ ssList(X240)
        | ~ ssList(X239) )
      & ( ~ ssList(X242)
        | app(X240,X242) != X239
        | frontsegP(X239,X240)
        | ~ ssList(X240)
        | ~ ssList(X239) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax5])])])])]) ).

cnf(c_0_72,negated_conjecture,
    ( hd(cons(hd(esk50_0),esk51_0)) = hd(esk50_0)
    | esk50_0 = nil
    | ~ ssList(cons(hd(esk50_0),nil)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_61,c_0_69]),c_0_38])]) ).

cnf(c_0_73,negated_conjecture,
    ( esk50_0 = nil
    | ssList(cons(hd(esk50_0),esk51_0))
    | ~ ssList(cons(hd(esk50_0),nil)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_32,c_0_69]),c_0_38])]) ).

cnf(c_0_74,negated_conjecture,
    ( esk50_0 = nil
    | app(esk50_0,cons(hd(esk50_0),nil)) != nil
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_70,c_0_41]),c_0_42])]) ).

cnf(c_0_75,plain,
    ( frontsegP(X3,X2)
    | ~ ssList(X1)
    | app(X2,X1) != X3
    | ~ ssList(X2)
    | ~ ssList(X3) ),
    inference(split_conjunct,[status(thm)],[c_0_71]) ).

cnf(c_0_76,negated_conjecture,
    ( hd(cons(hd(esk50_0),esk51_0)) = hd(esk50_0)
    | esk50_0 = nil
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_72,c_0_41]),c_0_42])]) ).

cnf(c_0_77,negated_conjecture,
    ( esk50_0 = nil
    | ssList(cons(hd(esk50_0),esk51_0))
    | ~ ssItem(hd(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_73,c_0_41]),c_0_42])]) ).

cnf(c_0_78,negated_conjecture,
    ( esk50_0 = nil
    | app(esk50_0,cons(hd(esk50_0),nil)) != nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_74,c_0_48]),c_0_38])]) ).

fof(c_0_79,plain,
    ! [X344,X345] :
      ( ~ ssList(X344)
      | ~ ssItem(X345)
      | hd(cons(X345,X344)) = X345 ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax23])])]) ).

fof(c_0_80,plain,
    ! [X386,X387,X388,X389] :
      ( ( X386 = X387
        | ~ frontsegP(cons(X386,X388),cons(X387,X389))
        | ~ ssList(X389)
        | ~ ssList(X388)
        | ~ ssItem(X387)
        | ~ ssItem(X386) )
      & ( frontsegP(X388,X389)
        | ~ frontsegP(cons(X386,X388),cons(X387,X389))
        | ~ ssList(X389)
        | ~ ssList(X388)
        | ~ ssItem(X387)
        | ~ ssItem(X386) )
      & ( X386 != X387
        | ~ frontsegP(X388,X389)
        | frontsegP(cons(X386,X388),cons(X387,X389))
        | ~ ssList(X389)
        | ~ ssList(X388)
        | ~ ssItem(X387)
        | ~ ssItem(X386) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax44])])])]) ).

fof(c_0_81,plain,
    ! [X338] :
      ( ( ssList(esk44_1(X338))
        | nil = X338
        | ~ ssList(X338) )
      & ( ssItem(esk45_1(X338))
        | nil = X338
        | ~ ssList(X338) )
      & ( cons(esk45_1(X338),esk44_1(X338)) = X338
        | nil = X338
        | ~ ssList(X338) ) ),
    inference(distribute,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax20])])])]) ).

cnf(c_0_82,plain,
    ( frontsegP(app(X1,X2),X1)
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(csr,[status(thm)],[inference(er,[status(thm)],[c_0_75]),c_0_32]) ).

cnf(c_0_83,negated_conjecture,
    ( hd(cons(hd(esk50_0),esk51_0)) = hd(esk50_0)
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_76,c_0_48]),c_0_38])]) ).

cnf(c_0_84,negated_conjecture,
    ( esk50_0 = nil
    | ssList(cons(hd(esk50_0),esk51_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_77,c_0_48]),c_0_38])]) ).

cnf(c_0_85,negated_conjecture,
    ( esk50_0 = nil
    | cons(hd(esk50_0),esk51_0) != nil ),
    inference(spm,[status(thm)],[c_0_78,c_0_69]) ).

cnf(c_0_86,plain,
    ( hd(cons(X2,X1)) = X2
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_79]) ).

cnf(c_0_87,plain,
    ( X1 = X2
    | ~ frontsegP(cons(X1,X3),cons(X2,X4))
    | ~ ssList(X4)
    | ~ ssList(X3)
    | ~ ssItem(X2)
    | ~ ssItem(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_80]) ).

cnf(c_0_88,plain,
    ( cons(esk45_1(X1),esk44_1(X1)) = X1
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_81]) ).

cnf(c_0_89,plain,
    ( ssItem(esk45_1(X1))
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_81]) ).

cnf(c_0_90,plain,
    ( ssList(esk44_1(X1))
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_81]) ).

cnf(c_0_91,negated_conjecture,
    ( esk50_0 = nil
    | frontsegP(cons(hd(esk50_0),esk51_0),esk50_0)
    | ~ ssList(cons(hd(esk50_0),nil)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_82,c_0_69]),c_0_38])]) ).

cnf(c_0_92,negated_conjecture,
    ( esk50_0 = nil
    | ssItem(hd(esk50_0)) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_48,c_0_83]),c_0_84]),c_0_85]) ).

cnf(c_0_93,plain,
    ( frontsegP(cons(X1,X3),cons(X2,X4))
    | X1 != X2
    | ~ frontsegP(X3,X4)
    | ~ ssList(X4)
    | ~ ssList(X3)
    | ~ ssItem(X2)
    | ~ ssItem(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_80]) ).

fof(c_0_94,plain,
    ! [X382] :
      ( ~ ssList(X382)
      | frontsegP(X382,X382) ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax42])]) ).

cnf(c_0_95,plain,
    ( cons(X1,tl(cons(X1,X2))) = cons(X1,X2)
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_50,c_0_86]),c_0_41]),c_0_65]) ).

cnf(c_0_96,plain,
    ( X1 = esk45_1(X2)
    | nil = X2
    | ~ frontsegP(cons(X1,X3),X2)
    | ~ ssList(X3)
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_87,c_0_88]),c_0_89]),c_0_90]) ).

cnf(c_0_97,negated_conjecture,
    ( esk50_0 = nil
    | frontsegP(cons(hd(esk50_0),esk51_0),esk50_0) ),
    inference(csr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_91,c_0_41]),c_0_42])]),c_0_92]) ).

cnf(c_0_98,plain,
    ( frontsegP(cons(X1,X2),cons(X1,X3))
    | ~ frontsegP(X2,X3)
    | ~ ssList(X3)
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(er,[status(thm)],[c_0_93]) ).

cnf(c_0_99,plain,
    ( frontsegP(X1,X1)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_94]) ).

cnf(c_0_100,plain,
    ( cons(esk45_1(X1),tl(X1)) = X1
    | nil = X1
    | ~ ssList(X1) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_95,c_0_88]),c_0_89]),c_0_90]) ).

cnf(c_0_101,negated_conjecture,
    ( esk45_1(esk50_0) = hd(esk50_0)
    | esk50_0 = nil ),
    inference(csr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_96,c_0_97]),c_0_66]),c_0_38])]),c_0_92]) ).

cnf(c_0_102,plain,
    ( frontsegP(cons(X1,X2),cons(X1,X2))
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(spm,[status(thm)],[c_0_98,c_0_99]) ).

cnf(c_0_103,negated_conjecture,
    ( cons(hd(esk50_0),tl(esk50_0)) = esk50_0
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_100,c_0_101]),c_0_38])]) ).

fof(c_0_104,plain,
    ! [X436,X437,X438] :
      ( ~ ssList(X436)
      | ~ ssList(X437)
      | ~ ssList(X438)
      | app(X437,X438) != app(X437,X436)
      | X438 = X436 ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax80])])]) ).

fof(c_0_105,plain,
    ! [X446] :
      ( ~ ssList(X446)
      | app(X446,nil) = X446 ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax84])]) ).

cnf(c_0_106,negated_conjecture,
    ( esk50_0 = nil
    | frontsegP(esk50_0,esk50_0)
    | ~ ssList(tl(esk50_0)) ),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_102,c_0_103]),c_0_92]) ).

cnf(c_0_107,plain,
    ( X3 = X1
    | ~ ssList(X1)
    | ~ ssList(X2)
    | ~ ssList(X3)
    | app(X2,X3) != app(X2,X1) ),
    inference(split_conjunct,[status(thm)],[c_0_104]) ).

cnf(c_0_108,plain,
    ( app(X1,nil) = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_105]) ).

cnf(c_0_109,plain,
    ( app(X1,esk6_2(X2,X1)) = X2
    | ~ frontsegP(X2,X1)
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_71]) ).

cnf(c_0_110,plain,
    ( ssList(esk6_2(X1,X2))
    | ~ frontsegP(X1,X2)
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_71]) ).

cnf(c_0_111,negated_conjecture,
    ( ~ ssItem(X1)
    | ~ ssList(X2)
    | ~ ssList(X3)
    | app(app(X2,cons(X1,nil)),X3) != esk49_0
    | app(app(X3,cons(X1,nil)),X2) != esk48_0 ),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

fof(c_0_112,plain,
    ! [X236,X238] :
      ( ( ssItem(esk5_1(X236))
        | ~ singletonP(X236)
        | ~ ssList(X236) )
      & ( cons(esk5_1(X236),nil) = X236
        | ~ singletonP(X236)
        | ~ ssList(X236) )
      & ( ~ ssItem(X238)
        | cons(X238,nil) != X236
        | singletonP(X236)
        | ~ ssList(X236) ) ),
    inference(distribute,[status(thm)],[inference(shift_quantors,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax4])])])])]) ).

fof(c_0_113,plain,
    ! [X351,X352,X353] :
      ( ~ ssList(X351)
      | ~ ssList(X352)
      | ~ ssItem(X353)
      | cons(X353,app(X352,X351)) = app(cons(X353,X352),X351) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax27])])]) ).

cnf(c_0_114,negated_conjecture,
    ( esk50_0 = nil
    | frontsegP(esk50_0,esk50_0) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_106,c_0_37]),c_0_38])]) ).

cnf(c_0_115,plain,
    ( X1 = nil
    | app(X2,X1) != X2
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_107,c_0_108]),c_0_42])]) ).

cnf(c_0_116,plain,
    ( app(X1,esk6_2(X1,X1)) = X1
    | ~ ssList(X1) ),
    inference(spm,[status(thm)],[c_0_109,c_0_99]) ).

cnf(c_0_117,plain,
    ( ssList(esk6_2(X1,X1))
    | ~ ssList(X1) ),
    inference(spm,[status(thm)],[c_0_110,c_0_99]) ).

cnf(c_0_118,negated_conjecture,
    ( app(app(X1,cons(X2,nil)),X3) != esk50_0
    | app(app(X3,cons(X2,nil)),X1) != esk51_0
    | ~ ssList(X1)
    | ~ ssList(X3)
    | ~ ssItem(X2) ),
    inference(rw,[status(thm)],[inference(rw,[status(thm)],[c_0_111,c_0_35]),c_0_28]) ).

cnf(c_0_119,plain,
    ( cons(esk5_1(X1),nil) = X1
    | ~ singletonP(X1)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_112]) ).

cnf(c_0_120,plain,
    ( ssItem(esk5_1(X1))
    | ~ singletonP(X1)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_112]) ).

fof(c_0_121,plain,
    ! [X354] :
      ( ~ ssList(X354)
      | app(nil,X354) = X354 ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax28])]) ).

cnf(c_0_122,plain,
    ( cons(X3,app(X2,X1)) = app(cons(X3,X2),X1)
    | ~ ssList(X1)
    | ~ ssList(X2)
    | ~ ssItem(X3) ),
    inference(split_conjunct,[status(thm)],[c_0_113]) ).

cnf(c_0_123,plain,
    ( nil = app(X2,X1)
    | nil != X1
    | nil != X2
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_46]) ).

cnf(c_0_124,plain,
    ( singletonP(X2)
    | ~ ssItem(X1)
    | cons(X1,nil) != X2
    | ~ ssList(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_112]) ).

cnf(c_0_125,negated_conjecture,
    ( app(esk50_0,esk6_2(esk50_0,esk50_0)) = esk50_0
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_109,c_0_114]),c_0_38])]) ).

cnf(c_0_126,plain,
    ( esk6_2(X1,X1) = nil
    | ~ ssList(X1) ),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_115,c_0_116]),c_0_117]) ).

fof(c_0_127,plain,
    ! [X347,X348] :
      ( ~ ssList(X347)
      | ~ ssItem(X348)
      | tl(cons(X348,X347)) = X347 ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax25])])]) ).

cnf(c_0_128,negated_conjecture,
    ( app(app(X1,X2),X3) != esk50_0
    | app(app(X3,X2),X1) != esk51_0
    | ~ singletonP(X2)
    | ~ ssList(X1)
    | ~ ssList(X3)
    | ~ ssList(X2) ),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_118,c_0_119]),c_0_120]) ).

cnf(c_0_129,plain,
    ( app(nil,X1) = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_121]) ).

fof(c_0_130,plain,
    ! [X439,X440] :
      ( ~ ssList(X439)
      | ~ ssItem(X440)
      | cons(X440,X439) = app(cons(X440,nil),X439) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax81])])]) ).

cnf(c_0_131,plain,
    ( ssList(cons(X1,app(X2,X3)))
    | ~ ssList(X3)
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_32,c_0_122]),c_0_41]) ).

cnf(c_0_132,plain,
    app(nil,nil) = nil,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(er,[status(thm)],[inference(er,[status(thm)],[c_0_123])]),c_0_42])]) ).

cnf(c_0_133,plain,
    ( singletonP(cons(X1,nil))
    | ~ ssList(cons(X1,nil))
    | ~ ssItem(X1) ),
    inference(er,[status(thm)],[c_0_124]) ).

cnf(c_0_134,negated_conjecture,
    ( app(esk50_0,nil) = esk50_0
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_125,c_0_126]),c_0_38])]) ).

cnf(c_0_135,plain,
    ( tl(cons(X2,X1)) = X1
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_127]) ).

cnf(c_0_136,negated_conjecture,
    ( cons(hd(cons(hd(esk50_0),esk51_0)),esk51_0) = cons(hd(esk50_0),esk51_0)
    | esk50_0 = nil ),
    inference(spm,[status(thm)],[c_0_60,c_0_69]) ).

cnf(c_0_137,negated_conjecture,
    ( app(app(X1,X2),nil) != esk51_0
    | app(X2,X1) != esk50_0
    | ~ singletonP(X2)
    | ~ ssList(X1)
    | ~ ssList(X2) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_128,c_0_129]),c_0_42])]) ).

cnf(c_0_138,plain,
    ( cons(X2,X1) = app(cons(X2,nil),X1)
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_130]) ).

cnf(c_0_139,plain,
    ( ssList(cons(X1,nil))
    | ~ ssItem(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_131,c_0_132]),c_0_42])]) ).

cnf(c_0_140,plain,
    ( singletonP(cons(X1,nil))
    | ~ ssItem(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_133,c_0_41]),c_0_42])]) ).

cnf(c_0_141,plain,
    ( nil = X1
    | ssList(app(tl(X1),X2))
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_37,c_0_51]),c_0_32]),c_0_52]) ).

cnf(c_0_142,negated_conjecture,
    ( app(tl(esk50_0),nil) = tl(esk50_0)
    | esk50_0 = nil ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_51,c_0_134]),c_0_42]),c_0_38])]) ).

cnf(c_0_143,negated_conjecture,
    ( tl(cons(hd(esk50_0),esk51_0)) = esk51_0
    | esk50_0 = nil
    | ~ ssItem(hd(cons(hd(esk50_0),esk51_0))) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_135,c_0_136]),c_0_66])]) ).

cnf(c_0_144,negated_conjecture,
    ( app(app(X1,cons(X2,nil)),nil) != esk51_0
    | cons(X2,X1) != esk50_0
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_137,c_0_138]),c_0_139]),c_0_140]) ).

cnf(c_0_145,negated_conjecture,
    ( esk50_0 = nil
    | ssList(tl(esk50_0)) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_141,c_0_142]),c_0_42]),c_0_38])]) ).

cnf(c_0_146,plain,
    ( app(tl(X1),nil) = tl(X1)
    | nil = X1
    | ~ ssList(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_51,c_0_108]),c_0_42])]) ).

cnf(c_0_147,negated_conjecture,
    ( tl(cons(hd(esk50_0),esk51_0)) = esk51_0
    | esk50_0 = nil ),
    inference(csr,[status(thm)],[inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_143,c_0_86]),c_0_66])]),c_0_92]) ).

cnf(c_0_148,negated_conjecture,
    ( neq(esk50_0,nil)
    | ~ neq(esk51_0,nil) ),
    inference(split_conjunct,[status(thm)],[c_0_25]) ).

cnf(c_0_149,negated_conjecture,
    ( esk50_0 = nil
    | app(app(tl(esk50_0),cons(hd(esk50_0),nil)),nil) != esk51_0 ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_144,c_0_103]),c_0_92]),c_0_145]) ).

cnf(c_0_150,negated_conjecture,
    ( app(esk51_0,nil) = esk51_0
    | esk50_0 = nil ),
    inference(csr,[status(thm)],[inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_146,c_0_147]),c_0_84]),c_0_85]) ).

cnf(c_0_151,plain,
    ( ~ neq(X1,X2)
    | X1 != X2
    | ~ ssList(X2)
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_49]) ).

cnf(c_0_152,negated_conjecture,
    neq(esk50_0,nil),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[c_0_148,c_0_31])]) ).

cnf(c_0_153,negated_conjecture,
    esk50_0 = nil,
    inference(csr,[status(thm)],[inference(spm,[status(thm)],[c_0_149,c_0_56]),c_0_150]) ).

cnf(c_0_154,plain,
    ( ~ ssList(X1)
    | ~ neq(X1,X1) ),
    inference(er,[status(thm)],[c_0_151]) ).

cnf(c_0_155,negated_conjecture,
    neq(nil,nil),
    inference(rw,[status(thm)],[c_0_152,c_0_153]) ).

cnf(c_0_156,negated_conjecture,
    $false,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_154,c_0_155]),c_0_42])]),
    [proof] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem    : SWC421+1 : TPTP v9.2.1. Released v2.4.0.
% 0.00/0.12  % Command    : /export/starexec/sandbox2/solver/bin/lemma_parallel_prover %s --lemma-prover /export/starexec/sandbox2/solver/bin/cse --final-prover /export/starexec/sandbox2/solver/bin/eprover --proof-time %d --global-time-limit %d
% 0.16/0.33  % Computer : n019.cluster.edu
% 0.16/0.33  % Model    : x86_64 x86_64
% 0.16/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.33  % Memory   : 8042.1875MB
% 0.16/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.16/0.33  % CPULimit   : 300
% 0.16/0.33  % WCLimit    : 300
% 0.16/0.33  % DateTime   : Tue May  5 04:50:14 EDT 2026
% 0.16/0.33  % CPUTime    : 
% 0.16/0.34  % start to proof: theBenchmark
% 15.74/9.73  % Version  : CSE_E---1.7
% 15.74/9.73  % Problem  : theBenchmark.p
% 15.74/9.73  % SZS status Theorem for theBenchmark.p
% 15.74/9.73  % SZS output start CNFRefutation
% See solution above
% 15.74/9.79  % Total time : 7.383s
%------------------------------------------------------------------------------