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iProver---3.9.4.THM-CRf.s

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%------------------------------------------------------------------------------
% File     : iProver---3.9.4
% Problem  : GRA008+2 : TPTP v9.3.1. Bugfixed v3.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM

% Computer : n004.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8046.5625MB
% OS       : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Fri Sep 25 01:23:35 PM UTC 2026

% Result   : Theorem 4.08s 1.42s
% Output   : CNFRefutation 4.08s
% Verified : 
% SZS Type : Refutation
%            Derivation depth      :   22
%            Number of leaves      :    5
% Syntax   : Number of formulae    :   90 (  21 unt;   0 def)
%            Number of atoms       :  294 (  81 equ)
%            Maximal formula atoms :   10 (   3 avg)
%            Number of connectives :  359 ( 155   ~; 148   |;  46   &)
%                                         (   2 <=>;   8  =>;   0  <=;   0 <~>)
%            Maximal formula depth :   11 (   6 avg)
%            Maximal term depth    :    3 (   1 avg)
%            Number of types       :    1 (   0 usr)
%            Number of type conns  :    0 (   0   >;   0   *;   0   +;   0  <<)
%            Number of predicates  :    8 (   6 usr;   2 prp; 0-3 aty)
%            Number of functors    :    8 (   8 usr;   5 con; 0-2 aty)
%            Number of variables   :  192 (   0 sgn 177   !;  15   ?;  96   :)

% Comments : 
%------------------------------------------------------------------------------
fof(f1,axiom,
    ! [X0] :
      ( edge(X0)
     => head_of(X0) != tail_of(X0) ),
    file('/export/starexec/sandbox/benchmark/Axioms/GRA001+0.ax',no_loops) ).

fof(f8,axiom,
    ! [X0,X1] :
      ( sequential(X0,X1)
    <=> ( head_of(X0) = tail_of(X1)
        & X0 != X1
        & edge(X1)
        & edge(X0) ) ),
    file('/export/starexec/sandbox/benchmark/Axioms/GRA001+0.ax',sequential_defn) ).

fof(f13,axiom,
    ! [X0,X1,X2] :
      ( triangle(X0,X1,X2)
    <=> ( sequential(X2,X0)
        & sequential(X1,X2)
        & sequential(X0,X1)
        & edge(X2)
        & edge(X1)
        & edge(X0) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',triangle_defn) ).

fof(f18,axiom,
    ( complete
   => ! [X0,X1,X2,X3,X4] :
        ( ( precedes(X2,X3,X4)
          & shortest_path(X0,X1,X4) )
       => ? [X5] :
            ( head_of(X5) = tail_of(X2)
            & tail_of(X5) = head_of(X3)
            & edge(X5) ) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',back_edge) ).

fof(f19,conjecture,
    ( complete
   => ! [X0,X1,X2,X3,X4] :
        ( ( sequential(X2,X3)
          & precedes(X2,X3,X4)
          & shortest_path(X0,X1,X4) )
       => ? [X5] : triangle(X2,X3,X5) ) ),
    file('/export/starexec/sandbox/benchmark/theBenchmark.p',sequential_is_triangle) ).

fof(f20,negated_conjecture,
    ~ ( complete
     => ! [X0,X1,X2,X3,X4] :
          ( ( sequential(X2,X3)
            & precedes(X2,X3,X4)
            & shortest_path(X0,X1,X4) )
         => ? [X5] : triangle(X2,X3,X5) ) ),
    inference(negated_conjecture,[status(cth)],[f19]) ).

fof(f21,plain,
    ! [X0,X1,X2] :
      ( ( sequential(X2,X0)
        & sequential(X1,X2)
        & sequential(X0,X1)
        & edge(X2)
        & edge(X1)
        & edge(X0) )
     => triangle(X0,X1,X2) ),
    inference(unused_predicate_definition_removal,[],[f13]) ).

fof(f24,plain,
    ( ~ complete
    | ! [X0,X1,X2,X3,X4] :
        ( ~ precedes(X2,X3,X4)
        | ~ shortest_path(X0,X1,X4)
        | ? [X5] :
            ( head_of(X5) = tail_of(X2)
            & tail_of(X5) = head_of(X3)
            & edge(X5) ) ) ),
    inference(ennf_transformation,[],[f18]) ).

fof(f25,plain,
    ( ~ complete
    | ! [X0,X1,X2,X3,X4] :
        ( ~ precedes(X2,X3,X4)
        | ~ shortest_path(X0,X1,X4)
        | ? [X5] :
            ( head_of(X5) = tail_of(X2)
            & tail_of(X5) = head_of(X3)
            & edge(X5) ) ) ),
    inference(flattening,[],[f24]) ).

fof(f26,plain,
    ( complete
    & ? [X0,X1,X2,X3,X4] :
        ( sequential(X2,X3)
        & precedes(X2,X3,X4)
        & shortest_path(X0,X1,X4)
        & ! [X5] : ~ triangle(X2,X3,X5) ) ),
    inference(ennf_transformation,[],[f20]) ).

fof(f27,plain,
    ( complete
    & ? [X0,X1,X2,X3,X4] :
        ( sequential(X2,X3)
        & precedes(X2,X3,X4)
        & shortest_path(X0,X1,X4)
        & ! [X5] : ~ triangle(X2,X3,X5) ) ),
    inference(flattening,[],[f26]) ).

fof(f28,plain,
    ! [X0] :
      ( ~ edge(X0)
      | head_of(X0) != tail_of(X0) ),
    inference(ennf_transformation,[],[f1]) ).

fof(f33,plain,
    ! [X0,X1,X2] :
      ( ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1)
      | ~ edge(X2)
      | ~ edge(X1)
      | ~ edge(X0)
      | triangle(X0,X1,X2) ),
    inference(ennf_transformation,[],[f21]) ).

fof(f34,plain,
    ! [X0,X1,X2] :
      ( ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1)
      | ~ edge(X2)
      | ~ edge(X1)
      | ~ edge(X0)
      | triangle(X0,X1,X2) ),
    inference(flattening,[],[f33]) ).

fof(f36,plain,
    ( ~ complete
    | ! [X0,X1,X2,X3,X4] :
        ( ~ precedes(X2,X3,X4)
        | ~ shortest_path(X0,X1,X4)
        | ( tail_of(X2) = head_of(sK0(X2,X3))
          & head_of(X3) = tail_of(sK0(X2,X3))
          & edge(sK0(X2,X3)) ) ) ),
    inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(X5,sK0(X2,X3))],[f25]) ).

fof(f37,plain,
    ( complete
    & sequential(sK3,sK4)
    & precedes(sK3,sK4,sK5)
    & shortest_path(sK1,sK2,sK5)
    & ! [X5] : ~ triangle(sK3,sK4,X5) ),
    inference(skolemize,[status(esa),new_symbols(skolem,[sK1,sK2,sK3,sK4,sK5]),skolemize(X0,sK1),skolemize(X1,sK2),skolemize(X2,sK3),skolemize(X3,sK4),skolemize(X4,sK5)],[f27]) ).

fof(f38,plain,
    ! [X0,X1] :
      ( ( ~ sequential(X0,X1)
        | ( head_of(X0) = tail_of(X1)
          & X0 != X1
          & edge(X1)
          & edge(X0) ) )
      & ( head_of(X0) != tail_of(X1)
        | X0 = X1
        | ~ edge(X1)
        | ~ edge(X0)
        | sequential(X0,X1) ) ),
    inference(nnf_transformation,[],[f8]) ).

fof(f39,plain,
    ! [X0,X1] :
      ( ( ~ sequential(X0,X1)
        | ( head_of(X0) = tail_of(X1)
          & X0 != X1
          & edge(X1)
          & edge(X0) ) )
      & ( head_of(X0) != tail_of(X1)
        | X0 = X1
        | ~ edge(X1)
        | ~ edge(X0)
        | sequential(X0,X1) ) ),
    inference(flattening,[],[f38]) ).

fof(f43,plain,
    ! [X2,X3,X0,X1,X4] :
      ( ~ complete
      | ~ precedes(X2,X3,X4)
      | ~ shortest_path(X0,X1,X4)
      | tail_of(X2) = head_of(sK0(X2,X3)) ),
    inference(cnf_transformation,[],[f36]) ).

fof(f44,plain,
    ! [X2,X3,X0,X1,X4] :
      ( ~ complete
      | ~ precedes(X2,X3,X4)
      | ~ shortest_path(X0,X1,X4)
      | head_of(X3) = tail_of(sK0(X2,X3)) ),
    inference(cnf_transformation,[],[f36]) ).

fof(f45,plain,
    ! [X2,X3,X0,X1,X4] :
      ( ~ complete
      | ~ precedes(X2,X3,X4)
      | ~ shortest_path(X0,X1,X4)
      | edge(sK0(X2,X3)) ),
    inference(cnf_transformation,[],[f36]) ).

fof(f46,plain,
    complete,
    inference(cnf_transformation,[],[f37]) ).

fof(f47,plain,
    sequential(sK3,sK4),
    inference(cnf_transformation,[],[f37]) ).

fof(f48,plain,
    precedes(sK3,sK4,sK5),
    inference(cnf_transformation,[],[f37]) ).

fof(f49,plain,
    shortest_path(sK1,sK2,sK5),
    inference(cnf_transformation,[],[f37]) ).

fof(f50,plain,
    ! [X5] : ~ triangle(sK3,sK4,X5),
    inference(cnf_transformation,[],[f37]) ).

fof(f51,plain,
    ! [X0] :
      ( ~ edge(X0)
      | head_of(X0) != tail_of(X0) ),
    inference(cnf_transformation,[],[f28]) ).

fof(f52,plain,
    ! [X0,X1] :
      ( ~ sequential(X0,X1)
      | head_of(X0) = tail_of(X1) ),
    inference(cnf_transformation,[],[f39]) ).

fof(f54,plain,
    ! [X0,X1] :
      ( ~ sequential(X0,X1)
      | edge(X1) ),
    inference(cnf_transformation,[],[f39]) ).

fof(f55,plain,
    ! [X0,X1] :
      ( ~ sequential(X0,X1)
      | edge(X0) ),
    inference(cnf_transformation,[],[f39]) ).

fof(f56,plain,
    ! [X0,X1] :
      ( head_of(X0) != tail_of(X1)
      | X0 = X1
      | ~ edge(X1)
      | ~ edge(X0)
      | sequential(X0,X1) ),
    inference(cnf_transformation,[],[f39]) ).

fof(f65,plain,
    ! [X2,X0,X1] :
      ( ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1)
      | ~ edge(X2)
      | ~ edge(X1)
      | ~ edge(X0)
      | triangle(X0,X1,X2) ),
    inference(cnf_transformation,[],[f34]) ).

tcf(c_49,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( edge(sK0(X3,X4))
      | ~ complete
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(cnf_transformation,[],[f45]) ).

tcf(c_50,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( tail_of(sK0(X3,X4)) = head_of(X4) )
      | ~ complete
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(cnf_transformation,[],[f44]) ).

tcf(c_51,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( head_of(sK0(X3,X4)) = tail_of(X3) )
      | ~ complete
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(cnf_transformation,[],[f43]) ).

tcf(c_52,negated_conjecture,
    ! [X0: $i] : ~ triangle(sK3,sK4,X0),
    inference(cnf_transformation,[],[f50]) ).

tcf(c_53,negated_conjecture,
    shortest_path(sK1,sK2,sK5),
    inference(cnf_transformation,[],[f49]) ).

tcf(c_54,negated_conjecture,
    precedes(sK3,sK4,sK5),
    inference(cnf_transformation,[],[f48]) ).

tcf(c_55,negated_conjecture,
    sequential(sK3,sK4),
    inference(cnf_transformation,[],[f47]) ).

tcf(c_56,negated_conjecture,
    complete,
    inference(cnf_transformation,[],[f46]) ).

tcf(c_57,plain,
    ! [X0: $i] :
      ( ~ edge(X0)
      | ( head_of(X0) != tail_of(X0) ) ),
    inference(cnf_transformation,[],[f51]) ).

tcf(c_58,plain,
    ! [X0: $i,X1: $i] :
      ( sequential(X0,X1)
      | ( X0 = X1 )
      | ~ edge(X1)
      | ~ edge(X0)
      | ( head_of(X0) != tail_of(X1) ) ),
    inference(cnf_transformation,[],[f56]) ).

tcf(c_59,plain,
    ! [X0: $i,X1: $i] :
      ( edge(X0)
      | ~ sequential(X0,X1) ),
    inference(cnf_transformation,[],[f55]) ).

tcf(c_60,plain,
    ! [X0: $i,X1: $i] :
      ( edge(X1)
      | ~ sequential(X0,X1) ),
    inference(cnf_transformation,[],[f54]) ).

tcf(c_62,plain,
    ! [X0: $i,X1: $i] :
      ( ( head_of(X0) = tail_of(X1) )
      | ~ sequential(X0,X1) ),
    inference(cnf_transformation,[],[f52]) ).

tcf(c_71,plain,
    ! [X0: $i,X1: $i,X2: $i] :
      ( triangle(X1,X2,X0)
      | ~ edge(X2)
      | ~ edge(X1)
      | ~ edge(X0)
      | ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1) ),
    inference(cnf_transformation,[],[f65]) ).

tcf(c_87,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( edge(sK0(X3,X4))
      | ~ shortest_path(X0,X1,X2)
      | ~ precedes(X3,X4,X2) ),
    inference(global_subsumption_just,[status(thm)],[c_49,c_56,c_49]) ).

tcf(c_88,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( edge(sK0(X3,X4))
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(renaming,[status(thm)],[c_87]) ).

tcf(c_89,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( head_of(sK0(X3,X4)) = tail_of(X3) )
      | ~ shortest_path(X0,X1,X2)
      | ~ precedes(X3,X4,X2) ),
    inference(global_subsumption_just,[status(thm)],[c_51,c_56,c_51]) ).

tcf(c_90,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( head_of(sK0(X3,X4)) = tail_of(X3) )
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(renaming,[status(thm)],[c_89]) ).

tcf(c_91,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( tail_of(sK0(X3,X4)) = head_of(X4) )
      | ~ shortest_path(X0,X1,X2)
      | ~ precedes(X3,X4,X2) ),
    inference(global_subsumption_just,[status(thm)],[c_50,c_56,c_50]) ).

tcf(c_92,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( tail_of(sK0(X3,X4)) = head_of(X4) )
      | ~ precedes(X3,X4,X2)
      | ~ shortest_path(X0,X1,X2) ),
    inference(renaming,[status(thm)],[c_91]) ).

tcf(c_93,plain,
    ! [X0: $i,X1: $i,X2: $i] :
      ( triangle(X1,X2,X0)
      | ~ edge(X2)
      | ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1) ),
    inference(global_subsumption_just,[status(thm)],[c_71,c_60,c_59,c_71]) ).

tcf(c_124,plain,
    ! [X0: $i,X1: $i,X2: $i] :
      ( triangle(X1,X2,X0)
      | ~ sequential(X2,X0)
      | ~ sequential(X1,X2)
      | ~ sequential(X0,X1) ),
    inference(backward_subsumption_resolution,[status(thm)],[c_93,c_59]) ).

tcf(c_402,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i] :
      ( ~ sequential(X3,X1)
      | ~ sequential(X2,X3)
      | ~ sequential(X1,X2)
      | ( X3 != sK4 )
      | ( X2 != sK3 )
      | ( X0 != X1 ) ),
    inference(resolution_lifted,[status(thm)],[c_52,c_124]) ).

tcf(c_403,plain,
    ! [X0: $i] :
      ( ~ sequential(sK3,sK4)
      | ~ sequential(sK4,X0)
      | ~ sequential(X0,sK3) ),
    inference(unflattening,[status(thm)],[c_402]) ).

tcf(c_404,plain,
    ! [X0: $i] :
      ( ~ sequential(X0,sK3)
      | ~ sequential(sK4,X0) ),
    inference(global_subsumption_just,[status(thm)],[c_403,c_55,c_403]) ).

tcf(c_405,plain,
    ! [X0: $i] :
      ( ~ sequential(sK4,X0)
      | ~ sequential(X0,sK3) ),
    inference(renaming,[status(thm)],[c_404]) ).

tcf(c_414,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( tail_of(sK0(X3,X4)) = head_of(X4) )
      | ~ precedes(X3,X4,X2)
      | ( X2 != sK5 )
      | ( X1 != sK2 )
      | ( X0 != sK1 ) ),
    inference(resolution_lifted,[status(thm)],[c_92,c_53]) ).

tcf(c_415,plain,
    ! [X0: $i,X1: $i] :
      ( ( tail_of(sK0(X0,X1)) = head_of(X1) )
      | ~ precedes(X0,X1,sK5) ),
    inference(unflattening,[status(thm)],[c_414]) ).

tcf(c_423,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( ( head_of(sK0(X3,X4)) = tail_of(X3) )
      | ~ precedes(X3,X4,X2)
      | ( X2 != sK5 )
      | ( X1 != sK2 )
      | ( X0 != sK1 ) ),
    inference(resolution_lifted,[status(thm)],[c_90,c_53]) ).

tcf(c_424,plain,
    ! [X0: $i,X1: $i] :
      ( ( head_of(sK0(X0,X1)) = tail_of(X0) )
      | ~ precedes(X0,X1,sK5) ),
    inference(unflattening,[status(thm)],[c_423]) ).

tcf(c_432,plain,
    ! [X0: $i,X1: $i,X2: $i,X3: $i,X4: $i] :
      ( edge(sK0(X3,X4))
      | ~ precedes(X3,X4,X2)
      | ( X2 != sK5 )
      | ( X1 != sK2 )
      | ( X0 != sK1 ) ),
    inference(resolution_lifted,[status(thm)],[c_88,c_53]) ).

tcf(c_433,plain,
    ! [X0: $i,X1: $i] :
      ( edge(sK0(X0,X1))
      | ~ precedes(X0,X1,sK5) ),
    inference(unflattening,[status(thm)],[c_432]) ).

tcf(c_1098,plain,
    edge(sK0(sK3,sK4)),
    inference(superposition,[status(thm)],[c_54,c_433]) ).

tcf(c_1108,plain,
    tail_of(sK0(sK3,sK4)) = head_of(sK4),
    inference(superposition,[status(thm)],[c_54,c_415]) ).

tcf(c_1113,plain,
    edge(sK3),
    inference(superposition,[status(thm)],[c_55,c_59]) ).

tcf(c_1118,plain,
    edge(sK4),
    inference(superposition,[status(thm)],[c_55,c_60]) ).

tcf(c_1133,plain,
    head_of(sK0(sK3,sK4)) = tail_of(sK3),
    inference(superposition,[status(thm)],[c_54,c_424]) ).

tcf(c_1182,plain,
    ( ~ edge(sK0(sK3,sK4))
    | ( head_of(sK0(sK3,sK4)) != head_of(sK4) ) ),
    inference(superposition,[status(thm)],[c_1108,c_57]) ).

tcf(c_1183,plain,
    ( ~ edge(sK0(sK3,sK4))
    | ( head_of(sK4) != tail_of(sK3) ) ),
    inference(light_normalisation,[status(thm)],[c_1182,c_1133]) ).

tcf(c_1184,plain,
    head_of(sK4) != tail_of(sK3),
    inference(forward_subsumption_resolution,[status(thm)],[c_1183,c_1098]) ).

tcf(c_1189,plain,
    head_of(sK3) = tail_of(sK4),
    inference(superposition,[status(thm)],[c_55,c_62]) ).

tcf(c_1200,plain,
    ! [X0: $i] :
      ( sequential(sK0(sK3,sK4),X0)
      | ( sK0(sK3,sK4) = X0 )
      | ~ edge(X0)
      | ~ edge(sK0(sK3,sK4))
      | ( tail_of(X0) != tail_of(sK3) ) ),
    inference(superposition,[status(thm)],[c_1133,c_58]) ).

tcf(c_1201,plain,
    ! [X0: $i] :
      ( sequential(X0,sK0(sK3,sK4))
      | ( sK0(sK3,sK4) = X0 )
      | ~ edge(X0)
      | ~ edge(sK0(sK3,sK4))
      | ( head_of(X0) != head_of(sK4) ) ),
    inference(superposition,[status(thm)],[c_1108,c_58]) ).

tcf(c_1202,plain,
    ! [X0: $i] :
      ( sequential(X0,sK0(sK3,sK4))
      | ( sK0(sK3,sK4) = X0 )
      | ~ edge(X0)
      | ( head_of(X0) != head_of(sK4) ) ),
    inference(forward_subsumption_resolution,[status(thm)],[c_1201,c_1098]) ).

tcf(c_1207,plain,
    ! [X0: $i] :
      ( sequential(sK0(sK3,sK4),X0)
      | ( sK0(sK3,sK4) = X0 )
      | ~ edge(X0)
      | ( tail_of(X0) != tail_of(sK3) ) ),
    inference(forward_subsumption_resolution,[status(thm)],[c_1200,c_1098]) ).

tcf(c_1214,plain,
    ( ~ edge(sK4)
    | ( head_of(sK3) != head_of(sK4) ) ),
    inference(superposition,[status(thm)],[c_1189,c_57]) ).

tcf(c_1222,plain,
    head_of(sK3) != head_of(sK4),
    inference(forward_subsumption_resolution,[status(thm)],[c_1214,c_1118]) ).

tcf(c_1293,plain,
    ( sequential(sK4,sK0(sK3,sK4))
    | ( sK0(sK3,sK4) = sK4 )
    | ~ edge(sK4) ),
    inference(equality_resolution,[status(thm)],[c_1202]) ).

tcf(c_1294,plain,
    ( sequential(sK4,sK0(sK3,sK4))
    | ( sK0(sK3,sK4) = sK4 ) ),
    inference(forward_subsumption_resolution,[status(thm)],[c_1293,c_1118]) ).

tcf(c_1314,plain,
    ( sequential(sK0(sK3,sK4),sK3)
    | ( sK0(sK3,sK4) = sK3 )
    | ~ edge(sK3) ),
    inference(equality_resolution,[status(thm)],[c_1207]) ).

tcf(c_1315,plain,
    ( sequential(sK0(sK3,sK4),sK3)
    | ( sK0(sK3,sK4) = sK3 ) ),
    inference(forward_subsumption_resolution,[status(thm)],[c_1314,c_1113]) ).

tcf(c_1478,plain,
    ( ( sK0(sK3,sK4) = sK3 )
    | ~ sequential(sK4,sK0(sK3,sK4)) ),
    inference(superposition,[status(thm)],[c_1315,c_405]) ).

tcf(c_1485,plain,
    ( ( sK0(sK3,sK4) = sK4 )
    | ( sK0(sK3,sK4) = sK3 ) ),
    inference(superposition,[status(thm)],[c_1294,c_1478]) ).

tcf(c_1498,plain,
    ( ( head_of(sK4) = tail_of(sK4) )
    | ( sK0(sK3,sK4) = sK3 ) ),
    inference(superposition,[status(thm)],[c_1485,c_1108]) ).

tcf(c_1502,plain,
    ( ( head_of(sK3) = head_of(sK4) )
    | ( sK0(sK3,sK4) = sK3 ) ),
    inference(light_normalisation,[status(thm)],[c_1498,c_1189]) ).

tcf(c_1503,plain,
    sK0(sK3,sK4) = sK3,
    inference(forward_subsumption_resolution,[status(thm)],[c_1502,c_1222]) ).

tcf(c_1512,plain,
    head_of(sK4) = tail_of(sK3),
    inference(demodulation,[status(thm)],[c_1108,c_1503]) ).

tcf(c_1514,plain,
    $false,
    inference(forward_subsumption_resolution,[status(thm)],[c_1512,c_1184]) ).


%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03  % Problem  : GRA008+2 : TPTP v9.3.1. Bugfixed v3.2.0.
% 0.00/0.05  % Command  : run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.16/0.44  % Computer : n004.cluster.edu
% 0.16/0.44  % Model    : x86_64 x86_64
% 0.16/0.44  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.16/0.44  % Memory   : 8046.5625MB
% 0.16/0.44  % OS       : Linux 6.8.0-71-generic
% 0.16/0.44  % CPULimit : 300
% 0.16/0.44  % WCLimit  : 300
% 0.16/0.44  % DateTime : Wed Sep 23 12:43:53 UTC 2026
% 0.16/0.44  % CPUTime  : 
% 0.16/0.44  Running run_iprover 300 /export/starexec/sandbox/benchmark/theBenchmark.p THM
% 0.16/0.50  Running first-order theorem proving
% 0.16/0.50  Running: /export/starexec/sandbox/solver/bin/iproveropt-multi-core.sh -d -n -l tptp -s fof_schedule -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.27/0.52  
% 0.27/0.52  % ======== iProver multi-core TPTP/SMT =========
% 0.27/0.52  
% 0.27/0.52  % Detected problem language: tptp
% 0.27/0.54  % Proving...
% 4.08/1.42  % SZS status Started for theBenchmark.p
% 4.08/1.42  % SZS status Theorem for theBenchmark.p
% 4.08/1.42  
% 4.08/1.42  %---------------- iProver v3.9.4 (pre CASC 2026/SMT-COMP 2026) ----------------%
% 4.08/1.42  
% 4.08/1.42  % ------  iProver source info
% 4.08/1.42  
% 4.08/1.42  % git: date: 2026-07-19 20:42:38 +0200
% 4.08/1.42  % git: sha1: 804e7d636a263075307957e923b7a22a4035de61
% 4.08/1.42  % git: non_committed_changes: false
% 4.08/1.42  
% 4.08/1.42  % ------ Parsing...
% 4.08/1.42  % ------ Clausification by vclausify_rel  & Parsing by iProver...% 
% 4.08/1.42  
% 4.08/1.42  % ------ Preprocessing... sup_sim: 0  sf_s  rm: 2 0s  sf_e  pe_s  pe:1:0s pe:2:0s pe_e  sup_sim: 0  sf_s  rm: 3 0s  sf_e  pe_s  pe_e % 
% 4.08/1.42  
% 4.08/1.42  % ------ Preprocessing... gs_s  sp: 0 0s  gs_e  snvd_s sp: 0 0s snvd_e % 
% 4.08/1.42  
% 4.08/1.42  % ------ Preprocessing... sf_s  rm: 1 0s  sf_e  sf_s  rm: 0 0s  sf_e 
% 4.08/1.42  % ------ Proving...
% 4.08/1.42  % ------ Problem Properties 
% 4.08/1.42  
% 4.08/1.42  % 
% 4.08/1.42  % clauses                               22
% 4.08/1.42  % conjectures                           2
% 4.08/1.42  % EPR                                   7
% 4.08/1.42  % Horn                                  16
% 4.08/1.42  % unary                                 3
% 4.08/1.42  % binary                                11
% 4.08/1.42  % lits                                  64
% 4.08/1.43  % lits eq                               26
% 4.08/1.43  % fd_pure                               0
% 4.08/1.43  % fd_pseudo                             0
% 4.08/1.43  % fd_cond                               0
% 4.08/1.43  % fd_pseudo_cond                        3
% 4.08/1.43  % AC symbols                            0
% 4.08/1.43  
% 4.08/1.43  % ------ Schedule dynamic 5 is on 
% 4.08/1.43  
% 4.08/1.43  % ------ Input Options "--resolution_flag false --inst_lit_sel_side none" Time Limit: 10.
% 4.08/1.43  
% 4.08/1.43  
% 4.08/1.43  % ------ 
% 4.08/1.43  % Current options:
% 4.08/1.43  % ------ 
% 4.08/1.43  
% 4.08/1.43  
% 4.08/1.43  % 
% 4.08/1.43  
% 4.08/1.43  % ------ Proving...
% 4.08/1.43  % 
% 4.08/1.43  
% 4.08/1.43  % SZS status Theorem for theBenchmark.p
% 4.08/1.43  
% 4.08/1.43  % SZS output start CNFRefutation for theBenchmark.p
% See solution above
% 4.08/1.43  
% 4.08/1.43  
%------------------------------------------------------------------------------