TSTP Solution File: CSR019+1 by Vampire-SAT---4.8

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Vampire-SAT---4.8
% Problem  : CSR019+1 : TPTP v8.1.2. Bugfixed v3.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : vampire --mode casc_sat -m 16384 --cores 7 -t %d %s

% Computer : n009.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 : Sun May  5 04:56:50 EDT 2024

% Result   : Theorem 0.22s 0.42s
% Output   : Refutation 0.22s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   11
%            Number of leaves      :   14
% Syntax   : Number of formulae    :   68 (  11 unt;   0 def)
%            Number of atoms       :  346 ( 143 equ)
%            Maximal formula atoms :   19 (   5 avg)
%            Number of connectives :  416 ( 138   ~; 143   |; 118   &)
%                                         (  15 <=>;   2  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   12 (   6 avg)
%            Maximal term depth    :    2 (   1 avg)
%            Number of predicates  :   14 (  12 usr;   1 prp; 0-3 aty)
%            Number of functors    :    9 (   9 usr;   8 con; 0-2 aty)
%            Number of variables   :  139 ( 139   !;   0   ?)

% Comments : 
%------------------------------------------------------------------------------
fof(f1919,plain,
    $false,
    inference(subsumption_resolution,[],[f1918,f422]) ).

fof(f422,plain,
    happens(pull,n1),
    inference(resolution,[],[f376,f307]) ).

fof(f307,plain,
    sP1(n1,pull),
    inference(equality_resolution,[],[f306]) ).

fof(f306,plain,
    ! [X1] :
      ( sP1(n1,X1)
      | pull != X1 ),
    inference(equality_resolution,[],[f241]) ).

fof(f241,plain,
    ! [X0,X1] :
      ( sP1(X0,X1)
      | n1 != X0
      | pull != X1 ),
    inference(cnf_transformation,[],[f144]) ).

fof(f144,plain,
    ! [X0,X1] :
      ( ( sP1(X0,X1)
        | n1 != X0
        | pull != X1 )
      & ( ( n1 = X0
          & pull = X1 )
        | ~ sP1(X0,X1) ) ),
    inference(rectify,[],[f143]) ).

fof(f143,plain,
    ! [X1,X0] :
      ( ( sP1(X1,X0)
        | n1 != X1
        | pull != X0 )
      & ( ( n1 = X1
          & pull = X0 )
        | ~ sP1(X1,X0) ) ),
    inference(flattening,[],[f142]) ).

fof(f142,plain,
    ! [X1,X0] :
      ( ( sP1(X1,X0)
        | n1 != X1
        | pull != X0 )
      & ( ( n1 = X1
          & pull = X0 )
        | ~ sP1(X1,X0) ) ),
    inference(nnf_transformation,[],[f104]) ).

fof(f104,plain,
    ! [X1,X0] :
      ( sP1(X1,X0)
    <=> ( n1 = X1
        & pull = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP1])]) ).

fof(f376,plain,
    ! [X0,X1] :
      ( ~ sP1(X1,X0)
      | happens(X0,X1) ),
    inference(resolution,[],[f246,f236]) ).

fof(f236,plain,
    ! [X0,X1] :
      ( sP2(X0,X1)
      | ~ sP1(X0,X1) ),
    inference(cnf_transformation,[],[f141]) ).

fof(f141,plain,
    ! [X0,X1] :
      ( ( sP2(X0,X1)
        | ( ( n2 != X0
            | push != X1 )
          & ( n2 != X0
            | pull != X1 )
          & ~ sP1(X0,X1)
          & ~ sP0(X0,X1) ) )
      & ( ( n2 = X0
          & push = X1 )
        | ( n2 = X0
          & pull = X1 )
        | sP1(X0,X1)
        | sP0(X0,X1)
        | ~ sP2(X0,X1) ) ),
    inference(rectify,[],[f140]) ).

fof(f140,plain,
    ! [X1,X0] :
      ( ( sP2(X1,X0)
        | ( ( n2 != X1
            | push != X0 )
          & ( n2 != X1
            | pull != X0 )
          & ~ sP1(X1,X0)
          & ~ sP0(X1,X0) ) )
      & ( ( n2 = X1
          & push = X0 )
        | ( n2 = X1
          & pull = X0 )
        | sP1(X1,X0)
        | sP0(X1,X0)
        | ~ sP2(X1,X0) ) ),
    inference(flattening,[],[f139]) ).

fof(f139,plain,
    ! [X1,X0] :
      ( ( sP2(X1,X0)
        | ( ( n2 != X1
            | push != X0 )
          & ( n2 != X1
            | pull != X0 )
          & ~ sP1(X1,X0)
          & ~ sP0(X1,X0) ) )
      & ( ( n2 = X1
          & push = X0 )
        | ( n2 = X1
          & pull = X0 )
        | sP1(X1,X0)
        | sP0(X1,X0)
        | ~ sP2(X1,X0) ) ),
    inference(nnf_transformation,[],[f105]) ).

fof(f105,plain,
    ! [X1,X0] :
      ( sP2(X1,X0)
    <=> ( ( n2 = X1
          & push = X0 )
        | ( n2 = X1
          & pull = X0 )
        | sP1(X1,X0)
        | sP0(X1,X0) ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP2])]) ).

fof(f246,plain,
    ! [X0,X1] :
      ( ~ sP2(X1,X0)
      | happens(X0,X1) ),
    inference(cnf_transformation,[],[f148]) ).

fof(f148,plain,
    ! [X0,X1] :
      ( ( happens(X0,X1)
        | ~ sP2(X1,X0) )
      & ( sP2(X1,X0)
        | ~ happens(X0,X1) ) ),
    inference(nnf_transformation,[],[f106]) ).

fof(f106,plain,
    ! [X0,X1] :
      ( happens(X0,X1)
    <=> sP2(X1,X0) ),
    inference(definition_folding,[],[f69,f105,f104,f103]) ).

fof(f103,plain,
    ! [X1,X0] :
      ( sP0(X1,X0)
    <=> ( n0 = X1
        & push = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP0])]) ).

fof(f69,plain,
    ! [X0,X1] :
      ( happens(X0,X1)
    <=> ( ( n2 = X1
          & push = X0 )
        | ( n2 = X1
          & pull = X0 )
        | ( n1 = X1
          & pull = X0 )
        | ( n0 = X1
          & push = X0 ) ) ),
    inference(rectify,[],[f16]) ).

fof(f16,axiom,
    ! [X3,X4] :
      ( happens(X3,X4)
    <=> ( ( n2 = X4
          & push = X3 )
        | ( n2 = X4
          & pull = X3 )
        | ( n1 = X4
          & pull = X3 )
        | ( n0 = X4
          & push = X3 ) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',happens_all_defn) ).

fof(f1918,plain,
    ~ happens(pull,n1),
    inference(subsumption_resolution,[],[f1914,f178]) ).

fof(f178,plain,
    holdsAt(forwards,n2),
    inference(cnf_transformation,[],[f50]) ).

fof(f50,plain,
    holdsAt(forwards,n2),
    inference(flattening,[],[f49]) ).

fof(f49,negated_conjecture,
    ~ ~ holdsAt(forwards,n2),
    inference(negated_conjecture,[],[f48]) ).

fof(f48,conjecture,
    ~ holdsAt(forwards,n2),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',not_forwards_2) ).

fof(f1914,plain,
    ( ~ holdsAt(forwards,n2)
    | ~ happens(pull,n1) ),
    inference(resolution,[],[f840,f552]) ).

fof(f552,plain,
    ! [X0] : terminates(pull,forwards,X0),
    inference(subsumption_resolution,[],[f551,f550]) ).

fof(f550,plain,
    ! [X0] :
      ( terminates(pull,forwards,X0)
      | ~ happens(push,X0) ),
    inference(resolution,[],[f528,f317]) ).

fof(f317,plain,
    ! [X0] :
      ( sP5(X0,forwards,pull)
      | ~ happens(push,X0) ),
    inference(equality_resolution,[],[f316]) ).

fof(f316,plain,
    ! [X2,X0] :
      ( sP5(X0,forwards,X2)
      | ~ happens(push,X0)
      | pull != X2 ),
    inference(equality_resolution,[],[f273]) ).

fof(f273,plain,
    ! [X2,X0,X1] :
      ( sP5(X0,X1,X2)
      | ~ happens(push,X0)
      | forwards != X1
      | pull != X2 ),
    inference(cnf_transformation,[],[f160]) ).

fof(f160,plain,
    ! [X0,X1,X2] :
      ( ( sP5(X0,X1,X2)
        | ~ happens(push,X0)
        | forwards != X1
        | pull != X2 )
      & ( ( happens(push,X0)
          & forwards = X1
          & pull = X2 )
        | ~ sP5(X0,X1,X2) ) ),
    inference(rectify,[],[f159]) ).

fof(f159,plain,
    ! [X2,X1,X0] :
      ( ( sP5(X2,X1,X0)
        | ~ happens(push,X2)
        | forwards != X1
        | pull != X0 )
      & ( ( happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ~ sP5(X2,X1,X0) ) ),
    inference(flattening,[],[f158]) ).

fof(f158,plain,
    ! [X2,X1,X0] :
      ( ( sP5(X2,X1,X0)
        | ~ happens(push,X2)
        | forwards != X1
        | pull != X0 )
      & ( ( happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ~ sP5(X2,X1,X0) ) ),
    inference(nnf_transformation,[],[f109]) ).

fof(f109,plain,
    ! [X2,X1,X0] :
      ( sP5(X2,X1,X0)
    <=> ( happens(push,X2)
        & forwards = X1
        & pull = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP5])]) ).

fof(f528,plain,
    ! [X2,X0,X1] :
      ( ~ sP5(X2,X1,X0)
      | terminates(X0,X1,X2) ),
    inference(resolution,[],[f283,f258]) ).

fof(f258,plain,
    ! [X2,X0,X1] :
      ( sP8(X0,X1,X2)
      | ~ sP5(X0,X1,X2) ),
    inference(cnf_transformation,[],[f151]) ).

fof(f151,plain,
    ! [X0,X1,X2] :
      ( ( sP8(X0,X1,X2)
        | ( ( happens(push,X0)
            | spinning != X1
            | pull != X2 )
          & ~ sP7(X0,X1,X2)
          & ~ sP6(X0,X1,X2)
          & ~ sP5(X0,X1,X2)
          & ~ sP4(X0,X1,X2)
          & ~ sP3(X0,X1,X2) ) )
      & ( ( ~ happens(push,X0)
          & spinning = X1
          & pull = X2 )
        | sP7(X0,X1,X2)
        | sP6(X0,X1,X2)
        | sP5(X0,X1,X2)
        | sP4(X0,X1,X2)
        | sP3(X0,X1,X2)
        | ~ sP8(X0,X1,X2) ) ),
    inference(rectify,[],[f150]) ).

fof(f150,plain,
    ! [X2,X1,X0] :
      ( ( sP8(X2,X1,X0)
        | ( ( happens(push,X2)
            | spinning != X1
            | pull != X0 )
          & ~ sP7(X2,X1,X0)
          & ~ sP6(X2,X1,X0)
          & ~ sP5(X2,X1,X0)
          & ~ sP4(X2,X1,X0)
          & ~ sP3(X2,X1,X0) ) )
      & ( ( ~ happens(push,X2)
          & spinning = X1
          & pull = X0 )
        | sP7(X2,X1,X0)
        | sP6(X2,X1,X0)
        | sP5(X2,X1,X0)
        | sP4(X2,X1,X0)
        | sP3(X2,X1,X0)
        | ~ sP8(X2,X1,X0) ) ),
    inference(flattening,[],[f149]) ).

fof(f149,plain,
    ! [X2,X1,X0] :
      ( ( sP8(X2,X1,X0)
        | ( ( happens(push,X2)
            | spinning != X1
            | pull != X0 )
          & ~ sP7(X2,X1,X0)
          & ~ sP6(X2,X1,X0)
          & ~ sP5(X2,X1,X0)
          & ~ sP4(X2,X1,X0)
          & ~ sP3(X2,X1,X0) ) )
      & ( ( ~ happens(push,X2)
          & spinning = X1
          & pull = X0 )
        | sP7(X2,X1,X0)
        | sP6(X2,X1,X0)
        | sP5(X2,X1,X0)
        | sP4(X2,X1,X0)
        | sP3(X2,X1,X0)
        | ~ sP8(X2,X1,X0) ) ),
    inference(nnf_transformation,[],[f112]) ).

fof(f112,plain,
    ! [X2,X1,X0] :
      ( sP8(X2,X1,X0)
    <=> ( ( ~ happens(push,X2)
          & spinning = X1
          & pull = X0 )
        | sP7(X2,X1,X0)
        | sP6(X2,X1,X0)
        | sP5(X2,X1,X0)
        | sP4(X2,X1,X0)
        | sP3(X2,X1,X0) ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP8])]) ).

fof(f283,plain,
    ! [X2,X0,X1] :
      ( ~ sP8(X2,X1,X0)
      | terminates(X0,X1,X2) ),
    inference(cnf_transformation,[],[f167]) ).

fof(f167,plain,
    ! [X0,X1,X2] :
      ( ( terminates(X0,X1,X2)
        | ~ sP8(X2,X1,X0) )
      & ( sP8(X2,X1,X0)
        | ~ terminates(X0,X1,X2) ) ),
    inference(nnf_transformation,[],[f113]) ).

fof(f113,plain,
    ! [X0,X1,X2] :
      ( terminates(X0,X1,X2)
    <=> sP8(X2,X1,X0) ),
    inference(definition_folding,[],[f76,f112,f111,f110,f109,f108,f107]) ).

fof(f107,plain,
    ! [X2,X1,X0] :
      ( sP3(X2,X1,X0)
    <=> ( ~ happens(pull,X2)
        & backwards = X1
        & push = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP3])]) ).

fof(f108,plain,
    ! [X2,X1,X0] :
      ( sP4(X2,X1,X0)
    <=> ( ~ happens(push,X2)
        & forwards = X1
        & pull = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP4])]) ).

fof(f110,plain,
    ! [X2,X1,X0] :
      ( sP6(X2,X1,X0)
    <=> ( happens(push,X2)
        & backwards = X1
        & pull = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP6])]) ).

fof(f111,plain,
    ! [X2,X1,X0] :
      ( sP7(X2,X1,X0)
    <=> ( ~ happens(pull,X2)
        & spinning = X1
        & push = X0 ) ),
    introduced(predicate_definition_introduction,[new_symbols(naming,[sP7])]) ).

fof(f76,plain,
    ! [X0,X1,X2] :
      ( terminates(X0,X1,X2)
    <=> ( ( ~ happens(push,X2)
          & spinning = X1
          & pull = X0 )
        | ( ~ happens(pull,X2)
          & spinning = X1
          & push = X0 )
        | ( happens(push,X2)
          & backwards = X1
          & pull = X0 )
        | ( happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ( ~ happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ( ~ happens(pull,X2)
          & backwards = X1
          & push = X0 ) ) ),
    inference(rectify,[],[f14]) ).

fof(f14,axiom,
    ! [X3,X1,X4] :
      ( terminates(X3,X1,X4)
    <=> ( ( ~ happens(push,X4)
          & spinning = X1
          & pull = X3 )
        | ( ~ happens(pull,X4)
          & spinning = X1
          & push = X3 )
        | ( happens(push,X4)
          & backwards = X1
          & pull = X3 )
        | ( happens(push,X4)
          & forwards = X1
          & pull = X3 )
        | ( ~ happens(push,X4)
          & forwards = X1
          & pull = X3 )
        | ( ~ happens(pull,X4)
          & backwards = X1
          & push = X3 ) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',terminates_all_defn) ).

fof(f551,plain,
    ! [X0] :
      ( terminates(pull,forwards,X0)
      | happens(push,X0) ),
    inference(resolution,[],[f529,f319]) ).

fof(f319,plain,
    ! [X0] :
      ( sP4(X0,forwards,pull)
      | happens(push,X0) ),
    inference(equality_resolution,[],[f318]) ).

fof(f318,plain,
    ! [X2,X0] :
      ( sP4(X0,forwards,X2)
      | happens(push,X0)
      | pull != X2 ),
    inference(equality_resolution,[],[f277]) ).

fof(f277,plain,
    ! [X2,X0,X1] :
      ( sP4(X0,X1,X2)
      | happens(push,X0)
      | forwards != X1
      | pull != X2 ),
    inference(cnf_transformation,[],[f163]) ).

fof(f163,plain,
    ! [X0,X1,X2] :
      ( ( sP4(X0,X1,X2)
        | happens(push,X0)
        | forwards != X1
        | pull != X2 )
      & ( ( ~ happens(push,X0)
          & forwards = X1
          & pull = X2 )
        | ~ sP4(X0,X1,X2) ) ),
    inference(rectify,[],[f162]) ).

fof(f162,plain,
    ! [X2,X1,X0] :
      ( ( sP4(X2,X1,X0)
        | happens(push,X2)
        | forwards != X1
        | pull != X0 )
      & ( ( ~ happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ~ sP4(X2,X1,X0) ) ),
    inference(flattening,[],[f161]) ).

fof(f161,plain,
    ! [X2,X1,X0] :
      ( ( sP4(X2,X1,X0)
        | happens(push,X2)
        | forwards != X1
        | pull != X0 )
      & ( ( ~ happens(push,X2)
          & forwards = X1
          & pull = X0 )
        | ~ sP4(X2,X1,X0) ) ),
    inference(nnf_transformation,[],[f108]) ).

fof(f529,plain,
    ! [X2,X0,X1] :
      ( ~ sP4(X2,X1,X0)
      | terminates(X0,X1,X2) ),
    inference(resolution,[],[f283,f257]) ).

fof(f257,plain,
    ! [X2,X0,X1] :
      ( sP8(X0,X1,X2)
      | ~ sP4(X0,X1,X2) ),
    inference(cnf_transformation,[],[f151]) ).

fof(f840,plain,
    ! [X0,X1] :
      ( ~ terminates(X1,X0,n1)
      | ~ holdsAt(X0,n2)
      | ~ happens(X1,n1) ),
    inference(superposition,[],[f249,f191]) ).

fof(f191,plain,
    n2 = plus(n1,n1),
    inference(cnf_transformation,[],[f25]) ).

fof(f25,axiom,
    n2 = plus(n1,n1),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',plus1_1) ).

fof(f249,plain,
    ! [X2,X0,X1] :
      ( ~ holdsAt(X2,plus(X1,n1))
      | ~ terminates(X0,X2,X1)
      | ~ happens(X0,X1) ),
    inference(cnf_transformation,[],[f98]) ).

fof(f98,plain,
    ! [X0,X1,X2] :
      ( ~ holdsAt(X2,plus(X1,n1))
      | ~ terminates(X0,X2,X1)
      | ~ happens(X0,X1) ),
    inference(flattening,[],[f97]) ).

fof(f97,plain,
    ! [X0,X1,X2] :
      ( ~ holdsAt(X2,plus(X1,n1))
      | ~ terminates(X0,X2,X1)
      | ~ happens(X0,X1) ),
    inference(ennf_transformation,[],[f72]) ).

fof(f72,plain,
    ! [X0,X1,X2] :
      ( ( terminates(X0,X2,X1)
        & happens(X0,X1) )
     => ~ holdsAt(X2,plus(X1,n1)) ),
    inference(rectify,[],[f10]) ).

fof(f10,axiom,
    ! [X3,X4,X1] :
      ( ( terminates(X3,X1,X4)
        & happens(X3,X4) )
     => ~ holdsAt(X1,plus(X4,n1)) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',happens_terminates_not_holds) ).

%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.13  % Problem    : CSR019+1 : TPTP v8.1.2. Bugfixed v3.1.0.
% 0.03/0.15  % Command    : vampire --mode casc_sat -m 16384 --cores 7 -t %d %s
% 0.14/0.36  % Computer : n009.cluster.edu
% 0.14/0.36  % Model    : x86_64 x86_64
% 0.14/0.36  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.36  % Memory   : 8042.1875MB
% 0.14/0.36  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.14/0.36  % CPULimit   : 300
% 0.14/0.36  % WCLimit    : 300
% 0.14/0.36  % DateTime   : Fri May  3 20:14:23 EDT 2024
% 0.14/0.36  % CPUTime    : 
% 0.14/0.37  % (4137)Running in auto input_syntax mode. Trying TPTP
% 0.22/0.38  % (4140)WARNING: value z3 for option sas not known
% 0.22/0.38  % (4140)dis+2_11_add=large:afr=on:amm=off:bd=off:bce=on:fsd=off:fde=none:gs=on:gsaa=full_model:gsem=off:irw=on:msp=off:nm=4:nwc=1.3:sas=z3:sims=off:sac=on:sp=reverse_arity_569 on theBenchmark for (569ds/0Mi)
% 0.22/0.38  % (4142)ott+10_10:1_add=off:afr=on:amm=off:anc=all:bd=off:bs=on:fsr=off:irw=on:lma=on:msp=off:nm=4:nwc=4.0:sac=on:sp=reverse_frequency_531 on theBenchmark for (531ds/0Mi)
% 0.22/0.38  % (4144)ott+1_64_av=off:bd=off:bce=on:fsd=off:fde=unused:gsp=on:irw=on:lcm=predicate:lma=on:nm=2:nwc=1.1:sims=off:urr=on_497 on theBenchmark for (497ds/0Mi)
% 0.22/0.38  % (4143)ott-10_8_av=off:bd=preordered:bs=on:fsd=off:fsr=off:fde=unused:irw=on:lcm=predicate:lma=on:nm=4:nwc=1.7:sp=frequency_522 on theBenchmark for (522ds/0Mi)
% 0.22/0.39  % (4141)fmb+10_1_bce=on:fmbsr=1.5:nm=32_533 on theBenchmark for (533ds/0Mi)
% 0.22/0.39  % (4139)fmb+10_1_bce=on:fmbdsb=on:fmbes=contour:fmbswr=3:fde=none:nm=0_793 on theBenchmark for (793ds/0Mi)
% 0.22/0.39  % (4138)fmb+10_1_bce=on:fmbas=function:fmbsr=1.2:fde=unused:nm=0_846 on theBenchmark for (846ds/0Mi)
% 0.22/0.39  Detected minimum model sizes of [3]
% 0.22/0.40  Detected maximum model sizes of [max]
% 0.22/0.40  TRYING [3]
% 0.22/0.40  TRYING [4]
% 0.22/0.41  % (4140)First to succeed.
% 0.22/0.42  % (4140)Solution written to "/export/starexec/sandbox/tmp/vampire-proof-4137"
% 0.22/0.42  % (4140)Refutation found. Thanks to Tanya!
% 0.22/0.42  % SZS status Theorem for theBenchmark
% 0.22/0.42  % SZS output start Proof for theBenchmark
% See solution above
% 0.22/0.42  % (4140)------------------------------
% 0.22/0.42  % (4140)Version: Vampire 4.8 (commit 3a798227e on 2024-05-03 07:42:47 +0200)
% 0.22/0.42  % (4140)Termination reason: Refutation
% 0.22/0.42  
% 0.22/0.42  % (4140)Memory used [KB]: 1381
% 0.22/0.42  % (4140)Time elapsed: 0.034 s
% 0.22/0.42  % (4140)Instructions burned: 59 (million)
% 0.22/0.42  % (4137)Success in time 0.049 s
%------------------------------------------------------------------------------