%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : GEO252+1 : TPTP v9.3.1. Bugfixed v6.4.0.
% 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 07:17:42 AM UTC 2026
% Result : Theorem 0.17s 0.43s
% Output : CNFRefutation 0.17s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 2
% Syntax : Number of formulae : 8 ( 3 unt; 0 def)
% Number of atoms : 21 ( 0 equ)
% Maximal formula atoms : 4 ( 2 avg)
% Number of connectives : 20 ( 7 ~; 3 |; 8 &)
% ( 0 <=>; 2 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 4 ( 3 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 3 con; 0-2 aty)
% Number of variables : 13 ( 2 sgn 8 !; 3 ?)
% Comments :
%------------------------------------------------------------------------------
fof(oag10,axiom,
! [A,L] :
~ ( left_apart_point(A,reverse_line(L))
| left_apart_point(A,L) ),
file('theBenchmark.p',oag10) ).
fof(con,conjecture,
! [A,B,L] :
( ( left_apart_point(B,reverse_line(L))
& left_apart_point(A,L) )
=> ( left_convergent_lines(line_connecting(A,B),L)
& distinct_points(A,B) ) ),
file('theBenchmark.p',con) ).
fof(con_neg,negated_conjecture,
~ ! [A,B,L] :
( ( left_apart_point(B,reverse_line(L))
& left_apart_point(A,L) )
=> ( left_convergent_lines(line_connecting(A,B),L)
& distinct_points(A,B) ) ),
inference(assume_negation,[status(cth)],[con]) ).
fof(nnf_32,plain,
? [A,B,L] :
( ( ~ left_convergent_lines(line_connecting(A,B),L)
| ~ distinct_points(A,B) )
& left_apart_point(B,reverse_line(L))
& left_apart_point(A,L) ),
inference(fof_nnf,[status(thm)],[con_neg]) ).
fof(sk_con_neg,plain,
( ( ~ left_convergent_lines(line_connecting(sK2,sK0),sK1)
| ~ distinct_points(sK2,sK0) )
& left_apart_point(sK0,reverse_line(sK1))
& left_apart_point(sK2,sK1) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK2,sK1,sK0]),skolemize(A,sK2),skolemize(B,sK0),skolemize(L,sK1)],[nnf_32]) ).
cnf(c_74,negated_conjecture,
left_apart_point(sK0,reverse_line(sK1)),
inference(split_conjunct,[status(thm)],[sk_con_neg]) ).
cnf(c_90,plain,
~ left_apart_point(A,reverse_line(B)),
inference(clausify,[status(thm)],[oag10]) ).
cnf(c_91,plain,
$false,
inference(resolve,[status(thm)],[c_90,c_74]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GEO252+1 : TPTP v9.3.1. Bugfixed v6.4.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.12/0.39 % Computer : n010.cluster.edu
% 0.12/0.39 % Model : x86_64 x86_64
% 0.12/0.39 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.39 % Memory : 8046.5625MB
% 0.12/0.39 % OS : Linux 6.8.0-71-generic
% 0.12/0.39 % CPULimit : 300
% 0.12/0.39 % WCLimit : 300
% 0.12/0.39 % DateTime : Fri Sep 25 13:10:59 UTC 2026
% 0.12/0.40 % CPUTime :
% 0.12/0.40 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.12/0.40 % Process 832068 was started by sandbox on n010,
% 0.12/0.40 % Fri Sep 25 13:10:59 2026
% 0.12/0.40 % The command was "/export/starexec/sandbox/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p".
% 0.17/0.42
% 0.17/0.42 % From the command line: assign(max_seconds, 300).
% 0.17/0.43
% 0.17/0.43 % SZS status Theorem for theBenchmark
% 0.17/0.43
% 0.17/0.43 % Proof 1 at 0.00 (+ 0.00) seconds.
% 0.17/0.43 % Length of proof is 5.
% 0.17/0.43 % Level of proof is 2.
% 0.17/0.43 % Maximum clause weight is 4.000.
% 0.17/0.43 % Given clauses 0.
% 0.17/0.43
% 0.17/0.43 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------