%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : GEO232+3 : TPTP v9.3.1. Released v4.0.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n010.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 : Sun Sep 27 07:17:37 AM UTC 2026
% Result : Theorem 0.15s 0.40s
% Output : CNFRefutation 0.15s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 6
% Syntax : Number of formulae : 22 ( 12 unt; 0 def)
% Number of atoms : 32 ( 0 equ)
% Maximal formula atoms : 2 ( 1 avg)
% Number of connectives : 25 ( 15 ~; 7 |; 0 &)
% ( 3 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 5 ( 4 usr; 1 prp; 0-2 aty)
% Number of functors : 2 ( 2 usr; 1 con; 0-1 aty)
% Number of variables : 26 ( 0 sgn 11 !; 1 ?)
% Comments :
%------------------------------------------------------------------------------
fof(a1_defns,axiom,
! [X,Y] :
( unequally_directed_opposite_lines(X,Y)
<=> unequally_directed_lines(X,reverse_line(Y)) ),
file('theBenchmark.p',a1_defns) ).
fof(a4_defns,axiom,
! [X,Y] :
( equally_directed_lines(X,Y)
<=> ~ unequally_directed_lines(X,Y) ),
file('theBenchmark.p',a4_defns) ).
fof(a5_defns,axiom,
! [X,Y] :
( equally_directed_opposite_lines(X,Y)
<=> ~ unequally_directed_opposite_lines(X,Y) ),
file('theBenchmark.p',a5_defns) ).
fof(ax5_basics,axiom,
! [L] : equally_directed_lines(L,L),
file('theBenchmark.p',ax5_basics) ).
fof(ax8_basics,axiom,
! [L,M] :
( unequally_directed_lines(L,reverse_line(M))
| unequally_directed_lines(L,M) ),
file('theBenchmark.p',ax8_basics) ).
fof(con,conjecture,
! [L] : unequally_directed_opposite_lines(L,L),
file('theBenchmark.p',con) ).
fof(con_neg,negated_conjecture,
~ ! [L] : unequally_directed_opposite_lines(L,L),
inference(assume_negation,[status(cth)],[con]) ).
cnf(c_38,plain,
( ~ unequally_directed_lines(A,reverse_line(B))
| unequally_directed_opposite_lines(A,B) ),
inference(clausify,[status(thm)],[a1_defns]) ).
cnf(c_40,plain,
( ~ unequally_directed_opposite_lines(A,B)
| ~ equally_directed_opposite_lines(A,B) ),
inference(clausify,[status(thm)],[a5_defns]) ).
cnf(c_41,plain,
( unequally_directed_opposite_lines(A,B)
| equally_directed_opposite_lines(A,B) ),
inference(clausify,[status(thm)],[a5_defns]) ).
fof(nnf_37,plain,
? [L] : ~ unequally_directed_opposite_lines(L,L),
inference(fof_nnf,[status(thm)],[con_neg]) ).
fof(sk_con_neg,plain,
~ unequally_directed_opposite_lines(sK0,sK0),
inference(skolemize,[status(esa),new_symbols(skolem,[sK0]),skolemize(L,sK0)],[nnf_37]) ).
cnf(c_44,negated_conjecture,
~ unequally_directed_opposite_lines(sK0,sK0),
inference(split_conjunct,[status(thm)],[sk_con_neg]) ).
cnf(c_48,plain,
( ~ unequally_directed_lines(A,B)
| ~ equally_directed_lines(A,B) ),
inference(clausify,[status(thm)],[a4_defns]) ).
cnf(c_51,plain,
equally_directed_lines(A,A),
inference(clausify,[status(thm)],[ax5_basics]) ).
cnf(c_56,negated_conjecture,
equally_directed_opposite_lines(sK0,sK0),
inference(resolve,[status(thm)],[c_44,c_41]) ).
cnf(c_58,plain,
( ~ unequally_directed_lines(A,reverse_line(B))
| ~ equally_directed_opposite_lines(A,B) ),
inference(resolve,[status(thm)],[c_40,c_38]) ).
cnf(c_107,negated_conjecture,
~ unequally_directed_lines(sK0,reverse_line(sK0)),
inference(resolve,[status(thm)],[c_58,c_56]) ).
cnf(c_115,plain,
( unequally_directed_lines(A,reverse_line(B))
| unequally_directed_lines(A,B) ),
inference(clausify,[status(thm)],[ax8_basics]) ).
cnf(c_130,plain,
~ unequally_directed_lines(A,A),
inference(resolve,[status(thm)],[c_51,c_48]) ).
cnf(c_136,negated_conjecture,
unequally_directed_lines(sK0,sK0),
inference(resolve,[status(thm)],[c_115,c_107]) ).
cnf(c_135,negated_conjecture,
$false,
inference(resolve,[status(thm)],[c_130,c_136]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GEO232+3 : TPTP v9.3.1. Released v4.0.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.10/0.37 % Computer : n010.cluster.edu
% 0.10/0.37 % Model : x86_64 x86_64
% 0.10/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.37 % Memory : 8046.5625MB
% 0.10/0.37 % OS : Linux 6.8.0-71-generic
% 0.10/0.37 % CPULimit : 300
% 0.10/0.37 % WCLimit : 300
% 0.10/0.37 % DateTime : Fri Sep 25 13:09:14 UTC 2026
% 0.10/0.37 % CPUTime :
% 0.10/0.37 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.10/0.37 % Process 828595 was started by sandbox on n010,
% 0.10/0.37 % Fri Sep 25 13:09:14 2026
% 0.10/0.37 % The command was "/export/starexec/sandbox/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p".
% 0.10/0.38
% 0.10/0.38 % From the command line: assign(max_seconds, 300).
% 0.15/0.40
% 0.15/0.40 % SZS status Theorem for theBenchmark
% 0.15/0.40
% 0.15/0.40 % Proof 1 at 0.01 (+ 0.00) seconds.
% 0.15/0.40 % Length of proof is 18.
% 0.15/0.40 % Level of proof is 4.
% 0.15/0.40 % Maximum clause weight is 7.000.
% 0.15/0.40 % Given clauses 7.
% 0.15/0.40
% 0.15/0.40 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------