TSTP Solution File: SWC235+1 by E---3.1

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : E---3.1
% Problem  : SWC235+1 : TPTP v8.1.2. Released v2.4.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : run_E %s %d THM

% Computer : n032.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 : 2400s
% WCLimit  : 300s
% DateTime : Tue Oct 10 19:40:01 EDT 2023

% Result   : Theorem 0.15s 0.47s
% Output   : CNFRefutation 0.15s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :    9
%            Number of leaves      :    7
% Syntax   : Number of formulae    :   36 (   8 unt;   0 def)
%            Number of atoms       :  203 (  62 equ)
%            Maximal formula atoms :   48 (   5 avg)
%            Number of connectives :  266 (  99   ~;  97   |;  48   &)
%                                         (   0 <=>;  22  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   33 (   6 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of predicates  :    8 (   6 usr;   1 prp; 0-2 aty)
%            Number of functors    :   12 (  12 usr;   7 con; 0-3 aty)
%            Number of variables   :   83 (   0 sgn;  38   !;  20   ?)

% Comments : 
%------------------------------------------------------------------------------
fof(ax38,axiom,
    ! [X1] :
      ( ssItem(X1)
     => ~ memberP(nil,X1) ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax38) ).

fof(co1,conjecture,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssList(X2)
         => ! [X3] :
              ( ssList(X3)
             => ! [X4] :
                  ( ssList(X4)
                 => ( X2 != X4
                    | X1 != X3
                    | nil = X1
                    | ? [X5] :
                        ( ssItem(X5)
                        & ? [X6] :
                            ( ssList(X6)
                            & ? [X7] :
                                ( ssList(X7)
                                & app(app(X6,cons(X5,nil)),X7) = X1
                                & ! [X8] :
                                    ( ssItem(X8)
                                   => ( ~ memberP(X6,X8)
                                      | ~ memberP(X7,X8)
                                      | ~ leq(X5,X8)
                                      | lt(X5,X8) ) ) ) ) )
                    | ! [X9] :
                        ( ssList(X9)
                       => ! [X10] :
                            ( ssList(X10)
                           => ( app(app(X9,X3),X10) != X4
                              | ~ equalelemsP(X3)
                              | ? [X11] :
                                  ( ssItem(X11)
                                  & ? [X12] :
                                      ( ssList(X12)
                                      & app(X12,cons(X11,nil)) = X9
                                      & ? [X13] :
                                          ( ssList(X13)
                                          & app(cons(X11,nil),X13) = X3 ) ) )
                              | ? [X14] :
                                  ( ssItem(X14)
                                  & ? [X15] :
                                      ( ssList(X15)
                                      & app(cons(X14,nil),X15) = X10
                                      & ? [X16] :
                                          ( ssList(X16)
                                          & app(X16,cons(X14,nil)) = X3 ) ) ) ) ) )
                    | ( nil != X4
                      & nil = X3 ) ) ) ) ) ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',co1) ).

fof(ax17,axiom,
    ssList(nil),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax17) ).

fof(ax28,axiom,
    ! [X1] :
      ( ssList(X1)
     => app(nil,X1) = X1 ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax28) ).

fof(ax81,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => cons(X2,X1) = app(cons(X2,nil),X1) ) ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax81) ).

fof(ax16,axiom,
    ! [X1] :
      ( ssList(X1)
     => ! [X2] :
          ( ssItem(X2)
         => ssList(cons(X2,X1)) ) ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax16) ).

fof(ax20,axiom,
    ! [X1] :
      ( ssList(X1)
     => ( nil = X1
        | ? [X2] :
            ( ssList(X2)
            & ? [X3] :
                ( ssItem(X3)
                & cons(X3,X2) = X1 ) ) ) ),
    file('/export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p',ax20) ).

fof(c_0_7,plain,
    ! [X1] :
      ( ssItem(X1)
     => ~ memberP(nil,X1) ),
    inference(fof_simplification,[status(thm)],[ax38]) ).

fof(c_0_8,negated_conjecture,
    ~ ! [X1] :
        ( ssList(X1)
       => ! [X2] :
            ( ssList(X2)
           => ! [X3] :
                ( ssList(X3)
               => ! [X4] :
                    ( ssList(X4)
                   => ( X2 != X4
                      | X1 != X3
                      | nil = X1
                      | ? [X5] :
                          ( ssItem(X5)
                          & ? [X6] :
                              ( ssList(X6)
                              & ? [X7] :
                                  ( ssList(X7)
                                  & app(app(X6,cons(X5,nil)),X7) = X1
                                  & ! [X8] :
                                      ( ssItem(X8)
                                     => ( ~ memberP(X6,X8)
                                        | ~ memberP(X7,X8)
                                        | ~ leq(X5,X8)
                                        | lt(X5,X8) ) ) ) ) )
                      | ! [X9] :
                          ( ssList(X9)
                         => ! [X10] :
                              ( ssList(X10)
                             => ( app(app(X9,X3),X10) != X4
                                | ~ equalelemsP(X3)
                                | ? [X11] :
                                    ( ssItem(X11)
                                    & ? [X12] :
                                        ( ssList(X12)
                                        & app(X12,cons(X11,nil)) = X9
                                        & ? [X13] :
                                            ( ssList(X13)
                                            & app(cons(X11,nil),X13) = X3 ) ) )
                                | ? [X14] :
                                    ( ssItem(X14)
                                    & ? [X15] :
                                        ( ssList(X15)
                                        & app(cons(X14,nil),X15) = X10
                                        & ? [X16] :
                                            ( ssList(X16)
                                            & app(X16,cons(X14,nil)) = X3 ) ) ) ) ) )
                      | ( nil != X4
                        & nil = X3 ) ) ) ) ) ),
    inference(fof_simplification,[status(thm)],[inference(assume_negation,[status(cth)],[co1])]) ).

fof(c_0_9,plain,
    ! [X109] :
      ( ~ ssItem(X109)
      | ~ memberP(nil,X109) ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[c_0_7])]) ).

fof(c_0_10,negated_conjecture,
    ! [X21,X22,X23,X27,X28,X29,X30,X31,X32] :
      ( ssList(esk1_0)
      & ssList(esk2_0)
      & ssList(esk3_0)
      & ssList(esk4_0)
      & esk2_0 = esk4_0
      & esk1_0 = esk3_0
      & nil != esk1_0
      & ( ssItem(esk5_3(X21,X22,X23))
        | ~ ssList(X23)
        | app(app(X22,cons(X21,nil)),X23) != esk1_0
        | ~ ssList(X22)
        | ~ ssItem(X21) )
      & ( memberP(X22,esk5_3(X21,X22,X23))
        | ~ ssList(X23)
        | app(app(X22,cons(X21,nil)),X23) != esk1_0
        | ~ ssList(X22)
        | ~ ssItem(X21) )
      & ( memberP(X23,esk5_3(X21,X22,X23))
        | ~ ssList(X23)
        | app(app(X22,cons(X21,nil)),X23) != esk1_0
        | ~ ssList(X22)
        | ~ ssItem(X21) )
      & ( leq(X21,esk5_3(X21,X22,X23))
        | ~ ssList(X23)
        | app(app(X22,cons(X21,nil)),X23) != esk1_0
        | ~ ssList(X22)
        | ~ ssItem(X21) )
      & ( ~ lt(X21,esk5_3(X21,X22,X23))
        | ~ ssList(X23)
        | app(app(X22,cons(X21,nil)),X23) != esk1_0
        | ~ ssList(X22)
        | ~ ssItem(X21) )
      & ssList(esk6_0)
      & ssList(esk7_0)
      & app(app(esk6_0,esk3_0),esk7_0) = esk4_0
      & equalelemsP(esk3_0)
      & ( ~ ssItem(X27)
        | ~ ssList(X28)
        | app(X28,cons(X27,nil)) != esk6_0
        | ~ ssList(X29)
        | app(cons(X27,nil),X29) != esk3_0 )
      & ( ~ ssItem(X30)
        | ~ ssList(X31)
        | app(cons(X30,nil),X31) != esk7_0
        | ~ ssList(X32)
        | app(X32,cons(X30,nil)) != esk3_0 )
      & ( nil = esk4_0
        | nil != esk3_0 ) ),
    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_8])])])])]) ).

cnf(c_0_11,plain,
    ( ~ ssItem(X1)
    | ~ memberP(nil,X1) ),
    inference(split_conjunct,[status(thm)],[c_0_9]) ).

cnf(c_0_12,negated_conjecture,
    ( memberP(X1,esk5_3(X2,X1,X3))
    | ~ ssList(X3)
    | app(app(X1,cons(X2,nil)),X3) != esk1_0
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_10]) ).

cnf(c_0_13,plain,
    ssList(nil),
    inference(split_conjunct,[status(thm)],[ax17]) ).

cnf(c_0_14,negated_conjecture,
    ( app(app(nil,cons(X1,nil)),X2) != esk1_0
    | ~ ssList(X2)
    | ~ ssItem(esk5_3(X1,nil,X2))
    | ~ ssItem(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_11,c_0_12]),c_0_13])]) ).

cnf(c_0_15,negated_conjecture,
    ( ssItem(esk5_3(X1,X2,X3))
    | ~ ssList(X3)
    | app(app(X2,cons(X1,nil)),X3) != esk1_0
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_10]) ).

fof(c_0_16,plain,
    ! [X43] :
      ( ~ ssList(X43)
      | app(nil,X43) = X43 ),
    inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax28])]) ).

cnf(c_0_17,negated_conjecture,
    ( app(app(nil,cons(X1,nil)),X2) != esk1_0
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_14,c_0_15]),c_0_13])]) ).

cnf(c_0_18,plain,
    ( app(nil,X1) = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_16]) ).

fof(c_0_19,plain,
    ! [X50,X51] :
      ( ~ ssList(X50)
      | ~ ssItem(X51)
      | cons(X51,X50) = app(cons(X51,nil),X50) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax81])])]) ).

cnf(c_0_20,negated_conjecture,
    ( app(cons(X1,nil),X2) != esk1_0
    | ~ ssList(cons(X1,nil))
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(spm,[status(thm)],[c_0_17,c_0_18]) ).

cnf(c_0_21,plain,
    ( cons(X2,X1) = app(cons(X2,nil),X1)
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_19]) ).

fof(c_0_22,plain,
    ! [X58,X59] :
      ( ~ ssList(X58)
      | ~ ssItem(X59)
      | ssList(cons(X59,X58)) ),
    inference(shift_quantors,[status(thm)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax16])])]) ).

fof(c_0_23,plain,
    ! [X33] :
      ( ( ssList(esk8_1(X33))
        | nil = X33
        | ~ ssList(X33) )
      & ( ssItem(esk9_1(X33))
        | nil = X33
        | ~ ssList(X33) )
      & ( cons(esk9_1(X33),esk8_1(X33)) = X33
        | nil = X33
        | ~ ssList(X33) ) ),
    inference(distribute,[status(thm)],[inference(skolemize,[status(esa)],[inference(variable_rename,[status(thm)],[inference(fof_nnf,[status(thm)],[ax20])])])]) ).

cnf(c_0_24,negated_conjecture,
    ( cons(X1,X2) != esk1_0
    | ~ ssList(cons(X1,nil))
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(spm,[status(thm)],[c_0_20,c_0_21]) ).

cnf(c_0_25,plain,
    ( ssList(cons(X2,X1))
    | ~ ssList(X1)
    | ~ ssItem(X2) ),
    inference(split_conjunct,[status(thm)],[c_0_22]) ).

cnf(c_0_26,plain,
    ( cons(esk9_1(X1),esk8_1(X1)) = X1
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_23]) ).

cnf(c_0_27,negated_conjecture,
    ssList(esk1_0),
    inference(split_conjunct,[status(thm)],[c_0_10]) ).

cnf(c_0_28,negated_conjecture,
    nil != esk1_0,
    inference(split_conjunct,[status(thm)],[c_0_10]) ).

cnf(c_0_29,plain,
    ( ssList(esk8_1(X1))
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_23]) ).

cnf(c_0_30,plain,
    ( ssItem(esk9_1(X1))
    | nil = X1
    | ~ ssList(X1) ),
    inference(split_conjunct,[status(thm)],[c_0_23]) ).

cnf(c_0_31,negated_conjecture,
    ( cons(X1,X2) != esk1_0
    | ~ ssList(X2)
    | ~ ssItem(X1) ),
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_24,c_0_25]),c_0_13])]) ).

cnf(c_0_32,negated_conjecture,
    cons(esk9_1(esk1_0),esk8_1(esk1_0)) = esk1_0,
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_26,c_0_27]),c_0_28]) ).

cnf(c_0_33,negated_conjecture,
    ssList(esk8_1(esk1_0)),
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_29,c_0_27]),c_0_28]) ).

cnf(c_0_34,negated_conjecture,
    ssItem(esk9_1(esk1_0)),
    inference(sr,[status(thm)],[inference(spm,[status(thm)],[c_0_30,c_0_27]),c_0_28]) ).

cnf(c_0_35,negated_conjecture,
    $false,
    inference(cn,[status(thm)],[inference(rw,[status(thm)],[inference(rw,[status(thm)],[inference(spm,[status(thm)],[c_0_31,c_0_32]),c_0_33]),c_0_34])]),
    [proof] ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.08/0.10  % Problem    : SWC235+1 : TPTP v8.1.2. Released v2.4.0.
% 0.08/0.11  % Command    : run_E %s %d THM
% 0.10/0.29  % Computer : n032.cluster.edu
% 0.10/0.29  % Model    : x86_64 x86_64
% 0.10/0.29  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.29  % Memory   : 8042.1875MB
% 0.10/0.29  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.10/0.29  % CPULimit   : 2400
% 0.10/0.29  % WCLimit    : 300
% 0.10/0.29  % DateTime   : Tue Oct  3 01:58:05 EDT 2023
% 0.10/0.30  % CPUTime    : 
% 0.15/0.42  Running first-order theorem proving
% 0.15/0.42  Running: /export/starexec/sandbox2/solver/bin/eprover --delete-bad-limit=2000000000 --definitional-cnf=24 -s --print-statistics -R --print-version --proof-object --auto-schedule=8 --cpu-limit=300 /export/starexec/sandbox2/tmp/tmp.FccRXHeo73/E---3.1_24658.p
% 0.15/0.47  # Version: 3.1pre001
% 0.15/0.47  # Preprocessing class: FSLSSMSSSSSNFFN.
% 0.15/0.47  # Scheduled 4 strats onto 8 cores with 300 seconds (2400 total)
% 0.15/0.47  # Starting G-E--_207_C18_F1_SE_CS_SP_PI_PS_S5PRR_S2S with 1500s (5) cores
% 0.15/0.47  # Starting new_bool_3 with 300s (1) cores
% 0.15/0.47  # Starting new_bool_1 with 300s (1) cores
% 0.15/0.47  # Starting sh5l with 300s (1) cores
% 0.15/0.47  # new_bool_3 with pid 24737 completed with status 0
% 0.15/0.47  # Result found by new_bool_3
% 0.15/0.47  # Preprocessing class: FSLSSMSSSSSNFFN.
% 0.15/0.47  # Scheduled 4 strats onto 8 cores with 300 seconds (2400 total)
% 0.15/0.47  # Starting G-E--_207_C18_F1_SE_CS_SP_PI_PS_S5PRR_S2S with 1500s (5) cores
% 0.15/0.47  # Starting new_bool_3 with 300s (1) cores
% 0.15/0.47  # SinE strategy is GSinE(CountFormulas,hypos,1.5,,3,20000,1.0)
% 0.15/0.47  # Search class: FGHSF-FFMM31-MFFFFFNN
% 0.15/0.47  # Scheduled 5 strats onto 1 cores with 300 seconds (300 total)
% 0.15/0.47  # Starting G-E--_302_C18_F1_URBAN_RG_S04BN with 181s (1) cores
% 0.15/0.47  # G-E--_302_C18_F1_URBAN_RG_S04BN with pid 24740 completed with status 0
% 0.15/0.47  # Result found by G-E--_302_C18_F1_URBAN_RG_S04BN
% 0.15/0.47  # Preprocessing class: FSLSSMSSSSSNFFN.
% 0.15/0.47  # Scheduled 4 strats onto 8 cores with 300 seconds (2400 total)
% 0.15/0.47  # Starting G-E--_207_C18_F1_SE_CS_SP_PI_PS_S5PRR_S2S with 1500s (5) cores
% 0.15/0.47  # Starting new_bool_3 with 300s (1) cores
% 0.15/0.47  # SinE strategy is GSinE(CountFormulas,hypos,1.5,,3,20000,1.0)
% 0.15/0.47  # Search class: FGHSF-FFMM31-MFFFFFNN
% 0.15/0.47  # Scheduled 5 strats onto 1 cores with 300 seconds (300 total)
% 0.15/0.47  # Starting G-E--_302_C18_F1_URBAN_RG_S04BN with 181s (1) cores
% 0.15/0.47  # Preprocessing time       : 0.003 s
% 0.15/0.47  
% 0.15/0.47  # Proof found!
% 0.15/0.47  # SZS status Theorem
% 0.15/0.47  # SZS output start CNFRefutation
% See solution above
% 0.15/0.47  # Parsed axioms                        : 96
% 0.15/0.47  # Removed by relevancy pruning/SinE    : 63
% 0.15/0.47  # Initial clauses                      : 73
% 0.15/0.47  # Removed in clause preprocessing      : 0
% 0.15/0.47  # Initial clauses in saturation        : 73
% 0.15/0.47  # Processed clauses                    : 250
% 0.15/0.47  # ...of these trivial                  : 4
% 0.15/0.47  # ...subsumed                          : 56
% 0.15/0.47  # ...remaining for further processing  : 190
% 0.15/0.47  # Other redundant clauses eliminated   : 3
% 0.15/0.47  # Clauses deleted for lack of memory   : 0
% 0.15/0.47  # Backward-subsumed                    : 26
% 0.15/0.47  # Backward-rewritten                   : 0
% 0.15/0.47  # Generated clauses                    : 1031
% 0.15/0.47  # ...of the previous two non-redundant : 936
% 0.15/0.47  # ...aggressively subsumed             : 0
% 0.15/0.47  # Contextual simplify-reflections      : 16
% 0.15/0.47  # Paramodulations                      : 1017
% 0.15/0.47  # Factorizations                       : 2
% 0.15/0.47  # NegExts                              : 0
% 0.15/0.47  # Equation resolutions                 : 10
% 0.15/0.47  # Total rewrite steps                  : 384
% 0.15/0.47  # Propositional unsat checks           : 0
% 0.15/0.47  #    Propositional check models        : 0
% 0.15/0.47  #    Propositional check unsatisfiable : 0
% 0.15/0.47  #    Propositional clauses             : 0
% 0.15/0.47  #    Propositional clauses after purity: 0
% 0.15/0.47  #    Propositional unsat core size     : 0
% 0.15/0.47  #    Propositional preprocessing time  : 0.000
% 0.15/0.47  #    Propositional encoding time       : 0.000
% 0.15/0.47  #    Propositional solver time         : 0.000
% 0.15/0.47  #    Success case prop preproc time    : 0.000
% 0.15/0.47  #    Success case prop encoding time   : 0.000
% 0.15/0.47  #    Success case prop solver time     : 0.000
% 0.15/0.47  # Current number of processed clauses  : 160
% 0.15/0.47  #    Positive orientable unit clauses  : 21
% 0.15/0.47  #    Positive unorientable unit clauses: 0
% 0.15/0.47  #    Negative unit clauses             : 9
% 0.15/0.47  #    Non-unit-clauses                  : 130
% 0.15/0.47  # Current number of unprocessed clauses: 744
% 0.15/0.47  # ...number of literals in the above   : 3420
% 0.15/0.47  # Current number of archived formulas  : 0
% 0.15/0.47  # Current number of archived clauses   : 28
% 0.15/0.47  # Clause-clause subsumption calls (NU) : 2249
% 0.15/0.47  # Rec. Clause-clause subsumption calls : 553
% 0.15/0.47  # Non-unit clause-clause subsumptions  : 63
% 0.15/0.47  # Unit Clause-clause subsumption calls : 290
% 0.15/0.47  # Rewrite failures with RHS unbound    : 0
% 0.15/0.47  # BW rewrite match attempts            : 0
% 0.15/0.47  # BW rewrite match successes           : 0
% 0.15/0.47  # Condensation attempts                : 0
% 0.15/0.47  # Condensation successes               : 0
% 0.15/0.47  # Termbank termtop insertions          : 22629
% 0.15/0.47  
% 0.15/0.47  # -------------------------------------------------
% 0.15/0.47  # User time                : 0.030 s
% 0.15/0.47  # System time              : 0.005 s
% 0.15/0.47  # Total time               : 0.035 s
% 0.15/0.47  # Maximum resident set size: 2040 pages
% 0.15/0.47  
% 0.15/0.47  # -------------------------------------------------
% 0.15/0.47  # User time                : 0.033 s
% 0.15/0.47  # System time              : 0.007 s
% 0.15/0.47  # Total time               : 0.040 s
% 0.15/0.47  # Maximum resident set size: 1820 pages
% 0.15/0.47  % E---3.1 exiting
% 0.15/0.47  % E---3.1 exiting
%------------------------------------------------------------------------------