%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : SET056-7 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n007.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 08:35:31 AM UTC 2026
% Result : Unsatisfiable 0.14s 0.46s
% Output : CNFRefutation 0.14s
% Verified :
% SZS Type : Refutation
% Derivation depth : 5
% Number of leaves : 5
% Syntax : Number of formulae : 16 ( 11 unt; 0 def)
% Number of atoms : 23 ( 7 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 19 ( 12 ~; 7 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 6 ( 2 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 3 ( 3 usr; 2 con; 0-2 aty)
% Number of variables : 8 ( 0 sgn 4 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(prove_equality1_3,axiom,
~ member(not_subclass_element(y,x),y),
file('theBenchmark.p',prove_equality1_3) ).
cnf(c_33,plain,
~ member(not_subclass_element(y,x),y),
inference(clausify,[status(thm)],[prove_equality1_3]) ).
fof(prove_equality1_2,axiom,
~ member(not_subclass_element(x,y),x),
file('theBenchmark.p',prove_equality1_2) ).
cnf(c_34,plain,
~ member(not_subclass_element(x,y),x),
inference(clausify,[status(thm)],[prove_equality1_2]) ).
fof(prove_equality1_1,axiom,
x != y,
file('theBenchmark.p',prove_equality1_1) ).
cnf(c_35,plain,
x != y,
inference(clausify,[status(thm)],[prove_equality1_1]) ).
cnf(c_36,plain,
y != x,
inference(copy,[status(thm)],[c_35]) ).
fof(subclass_implies_equal,axiom,
! [VAR_0,VAR_1] :
( VAR_0 = VAR_1
| ~ subclass(VAR_1,VAR_0)
| ~ subclass(VAR_0,VAR_1) ),
file('theBenchmark.p',subclass_implies_equal) ).
cnf(c_122,plain,
( A = B
| ~ subclass(B,A)
| ~ subclass(A,B) ),
inference(clausify,[status(thm)],[subclass_implies_equal]) ).
fof(not_subclass_members1,axiom,
! [VAR_0,VAR_1] :
( subclass(VAR_0,VAR_1)
| member(not_subclass_element(VAR_0,VAR_1),VAR_0) ),
file('theBenchmark.p',not_subclass_members1) ).
cnf(c_127,plain,
( subclass(A,B)
| member(not_subclass_element(A,B),A) ),
inference(clausify,[status(thm)],[not_subclass_members1]) ).
cnf(c_324,plain,
subclass(x,y),
inference(resolve,[status(thm)],[c_127,c_34]) ).
cnf(c_325,plain,
subclass(y,x),
inference(resolve,[status(thm)],[c_127,c_33]) ).
cnf(c_400,plain,
( y = x
| ~ subclass(y,x) ),
inference(resolve,[status(thm)],[c_324,c_122]) ).
cnf(c_401,plain,
y = x,
inference(resolve,[status(thm)],[c_325,c_400]) ).
cnf(c_399,plain,
$false,
inference(resolve,[status(thm)],[c_36,c_401]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : SET056-7 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.09/0.37 % Computer : n007.cluster.edu
% 0.09/0.37 % Model : x86_64 x86_64
% 0.09/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.37 % Memory : 8046.5625MB
% 0.09/0.37 % OS : Linux 6.8.0-71-generic
% 0.09/0.37 % CPULimit : 300
% 0.09/0.37 % WCLimit : 300
% 0.09/0.37 % DateTime : Sat Sep 26 06:58:09 UTC 2026
% 0.09/0.37 % CPUTime :
% 0.09/0.37 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.09/0.37 % Process 3063642 was started by sandbox2 on n007,
% 0.09/0.37 % Sat Sep 26 06:58:09 2026
% 0.09/0.37 % The command was "/export/starexec/sandbox2/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p".
% 0.09/0.38
% 0.09/0.38 % From the command line: assign(max_seconds, 300).
% 0.14/0.46
% 0.14/0.46 % SZS status Unsatisfiable for theBenchmark
% 0.14/0.46
% 0.14/0.46 % Proof 1 at 0.02 (+ 0.01) seconds.
% 0.14/0.46 % Length of proof is 9.
% 0.14/0.46 % Level of proof is 2.
% 0.14/0.46 % Maximum clause weight is 18.000.
% 0.14/0.46 % Given clauses 112.
% 0.14/0.46
% 0.14/0.46 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------