%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : FLD015-3 : 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 : n014.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 07:11:28 AM UTC 2026
% Result : Unsatisfiable 1.00s 0.53s
% Output : CNFRefutation 1.00s
% Verified :
% SZS Type : Refutation
% Derivation depth : 9
% Number of leaves : 8
% Syntax : Number of formulae : 28 ( 16 unt; 0 def)
% Number of atoms : 46 ( 0 equ)
% Maximal formula atoms : 4 ( 1 avg)
% Number of connectives : 45 ( 27 ~; 18 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 3 ( 2 usr; 1 prp; 0-3 aty)
% Number of functors : 4 ( 4 usr; 3 con; 0-1 aty)
% Number of variables : 30 ( 0 sgn 11 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(associativity_addition_2,axiom,
! [VAR_0,VAR_1,VAR_2,VAR_3,VAR_4,VAR_5] :
( ~ sum(VAR_3,VAR_5,VAR_2)
| ~ sum(VAR_4,VAR_1,VAR_5)
| ~ sum(VAR_3,VAR_4,VAR_0)
| sum(VAR_0,VAR_1,VAR_2) ),
file('theBenchmark.p',associativity_addition_2) ).
cnf(c_2,plain,
( ~ sum(D,F,C)
| ~ sum(E,B,F)
| ~ sum(D,E,A)
| sum(A,B,C) ),
inference(clausify,[status(thm)],[associativity_addition_2]) ).
fof(existence_of_identity_addition,axiom,
! [VAR_0] :
( ~ defined(VAR_0)
| sum(additive_identity,VAR_0,VAR_0) ),
file('theBenchmark.p',existence_of_identity_addition) ).
cnf(c_3,plain,
( ~ defined(A)
| sum(additive_identity,A,A) ),
inference(clausify,[status(thm)],[existence_of_identity_addition]) ).
fof(existence_of_inverse_addition,axiom,
! [VAR_0] :
( ~ defined(VAR_0)
| sum(additive_inverse(VAR_0),VAR_0,additive_identity) ),
file('theBenchmark.p',existence_of_inverse_addition) ).
cnf(c_4,plain,
( ~ defined(A)
| sum(additive_inverse(A),A,additive_identity) ),
inference(clausify,[status(thm)],[existence_of_inverse_addition]) ).
fof(commutativity_addition,axiom,
! [VAR_0,VAR_1,VAR_2] :
( ~ sum(VAR_1,VAR_0,VAR_2)
| sum(VAR_0,VAR_1,VAR_2) ),
file('theBenchmark.p',commutativity_addition) ).
cnf(c_5,plain,
( ~ sum(B,A,C)
| sum(A,B,C) ),
inference(clausify,[status(thm)],[commutativity_addition]) ).
fof(a_is_defined,axiom,
defined(a),
file('theBenchmark.p',a_is_defined) ).
cnf(c_27,plain,
defined(a),
inference(clausify,[status(thm)],[a_is_defined]) ).
fof(b_is_defined,axiom,
defined(b),
file('theBenchmark.p',b_is_defined) ).
cnf(c_28,plain,
defined(b),
inference(clausify,[status(thm)],[b_is_defined]) ).
fof(sum_3,axiom,
sum(additive_identity,additive_inverse(a),additive_inverse(b)),
file('theBenchmark.p',sum_3) ).
cnf(c_29,plain,
sum(additive_identity,additive_inverse(a),additive_inverse(b)),
inference(clausify,[status(thm)],[sum_3]) ).
fof(not_sum_4,axiom,
~ sum(additive_identity,a,b),
file('theBenchmark.p',not_sum_4) ).
cnf(c_30,plain,
~ sum(additive_identity,a,b),
inference(clausify,[status(thm)],[not_sum_4]) ).
cnf(c_98,plain,
sum(additive_inverse(a),a,additive_identity),
inference(resolve,[status(thm)],[c_27,c_4]) ).
cnf(c_114,plain,
sum(additive_inverse(b),b,additive_identity),
inference(resolve,[status(thm)],[c_28,c_4]) ).
cnf(c_115,plain,
sum(additive_identity,b,b),
inference(resolve,[status(thm)],[c_28,c_3]) ).
cnf(c_325,plain,
sum(b,additive_identity,b),
inference(resolve,[status(thm)],[c_115,c_5]) ).
cnf(c_1577,plain,
( ~ sum(A,C,b)
| ~ sum(B,a,C)
| ~ sum(A,B,additive_identity) ),
inference(resolve,[status(thm)],[c_2,c_30]) ).
cnf(c_1578,plain,
( ~ sum(A,additive_identity,b)
| ~ sum(A,additive_inverse(a),additive_identity) ),
inference(resolve,[status(thm)],[c_1577,c_98]) ).
cnf(c_962,plain,
~ sum(b,additive_inverse(a),additive_identity),
inference(resolve,[status(thm)],[c_1578,c_325]) ).
cnf(c_1579,plain,
( ~ sum(A,C,additive_identity)
| ~ sum(B,additive_inverse(a),C)
| ~ sum(A,B,b) ),
inference(resolve,[status(thm)],[c_2,c_962]) ).
cnf(c_1580,plain,
( ~ sum(b,A,additive_identity)
| ~ sum(additive_identity,additive_inverse(a),A) ),
inference(resolve,[status(thm)],[c_1579,c_325]) ).
cnf(c_1234,plain,
~ sum(b,additive_inverse(b),additive_identity),
inference(resolve,[status(thm)],[c_1580,c_29]) ).
cnf(c_1581,plain,
~ sum(additive_inverse(b),b,additive_identity),
inference(resolve,[status(thm)],[c_5,c_1234]) ).
cnf(c_1576,plain,
$false,
inference(resolve,[status(thm)],[c_114,c_1581]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : FLD015-3 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.10/0.35 % Computer : n014.cluster.edu
% 0.10/0.35 % Model : x86_64 x86_64
% 0.10/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.35 % Memory : 8046.5625MB
% 0.10/0.35 % OS : Linux 6.8.0-71-generic
% 0.10/0.35 % CPULimit : 300
% 0.10/0.35 % WCLimit : 300
% 0.10/0.35 % DateTime : Sun Sep 27 02:22:16 UTC 2026
% 0.10/0.35 % CPUTime :
% 0.10/0.36 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.10/0.36 % Process 387328 was started by sandbox2 on n014,
% 0.10/0.36 % Sun Sep 27 02:22:16 2026
% 0.10/0.36 % The command was "/export/starexec/sandbox2/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p".
% 0.10/0.36
% 0.10/0.36 % From the command line: assign(max_seconds, 300).
% 1.00/0.53
% 1.00/0.53 % SZS status Unsatisfiable for theBenchmark
% 1.00/0.53
% 1.00/0.53 % Proof 1 at 0.12 (+ 0.03) seconds.
% 1.00/0.53 % Length of proof is 15.
% 1.00/0.53 % Level of proof is 5.
% 1.00/0.53 % Maximum clause weight is 21.000.
% 1.00/0.53 % Given clauses 245.
% 1.00/0.53
% 1.00/0.53 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------