%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : FLD035-3 : TPTP v9.3.1. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n008.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 07:11:33 AM UTC 2026
% Result : Unsatisfiable 1.92s 0.77s
% Output : CNFRefutation 1.92s
% Verified :
% SZS Type : Refutation
% Derivation depth : 11
% Number of leaves : 13
% Syntax : Number of formulae : 43 ( 26 unt; 0 def)
% Number of atoms : 73 ( 0 equ)
% Maximal formula atoms : 4 ( 1 avg)
% Number of connectives : 70 ( 40 ~; 30 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 3 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of predicates : 4 ( 3 usr; 1 prp; 0-3 aty)
% Number of functors : 7 ( 7 usr; 6 con; 0-1 aty)
% Number of variables : 46 ( 0 sgn 17 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(associativity_multiplication_1,axiom,
! [VAR_0,VAR_1,VAR_2,VAR_3,VAR_4,VAR_5] :
( ~ product(VAR_4,VAR_5,VAR_2)
| ~ product(VAR_3,VAR_5,VAR_1)
| ~ product(VAR_0,VAR_3,VAR_4)
| product(VAR_0,VAR_1,VAR_2) ),
file('theBenchmark.p',associativity_multiplication_1) ).
cnf(c_6,plain,
( ~ product(E,F,C)
| ~ product(D,F,B)
| ~ product(A,D,E)
| product(A,B,C) ),
inference(clausify,[status(thm)],[associativity_multiplication_1]) ).
fof(associativity_multiplication_2,axiom,
! [VAR_0,VAR_1,VAR_2,VAR_3,VAR_4,VAR_5] :
( ~ product(VAR_3,VAR_5,VAR_2)
| ~ product(VAR_4,VAR_1,VAR_5)
| ~ product(VAR_3,VAR_4,VAR_0)
| product(VAR_0,VAR_1,VAR_2) ),
file('theBenchmark.p',associativity_multiplication_2) ).
cnf(c_7,plain,
( ~ product(D,F,C)
| ~ product(E,B,F)
| ~ product(D,E,A)
| product(A,B,C) ),
inference(clausify,[status(thm)],[associativity_multiplication_2]) ).
fof(existence_of_identity_multiplication,axiom,
! [VAR_0] :
( ~ defined(VAR_0)
| product(multiplicative_identity,VAR_0,VAR_0) ),
file('theBenchmark.p',existence_of_identity_multiplication) ).
cnf(c_8,plain,
( ~ defined(A)
| product(multiplicative_identity,A,A) ),
inference(clausify,[status(thm)],[existence_of_identity_multiplication]) ).
fof(existence_of_inverse_multiplication,axiom,
! [VAR_0] :
( ~ defined(VAR_0)
| sum(additive_identity,VAR_0,additive_identity)
| product(multiplicative_inverse(VAR_0),VAR_0,multiplicative_identity) ),
file('theBenchmark.p',existence_of_inverse_multiplication) ).
cnf(c_9,plain,
( ~ defined(A)
| sum(additive_identity,A,additive_identity)
| product(multiplicative_inverse(A),A,multiplicative_identity) ),
inference(clausify,[status(thm)],[existence_of_inverse_multiplication]) ).
fof(commutativity_multiplication,axiom,
! [VAR_0,VAR_1,VAR_2] :
( ~ product(VAR_1,VAR_0,VAR_2)
| product(VAR_0,VAR_1,VAR_2) ),
file('theBenchmark.p',commutativity_multiplication) ).
cnf(c_10,plain,
( ~ product(B,A,C)
| product(A,B,C) ),
inference(clausify,[status(thm)],[commutativity_multiplication]) ).
fof(well_definedness_of_multiplicative_identity,axiom,
defined(multiplicative_identity),
file('theBenchmark.p',well_definedness_of_multiplicative_identity) ).
cnf(c_17,plain,
defined(multiplicative_identity),
inference(clausify,[status(thm)],[well_definedness_of_multiplicative_identity]) ).
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(c_is_defined,axiom,
defined(c),
file('theBenchmark.p',c_is_defined) ).
cnf(c_29,plain,
defined(c),
inference(clausify,[status(thm)],[c_is_defined]) ).
fof(product_5,axiom,
product(a,c,u),
file('theBenchmark.p',product_5) ).
cnf(c_31,plain,
product(a,c,u),
inference(clausify,[status(thm)],[product_5]) ).
fof(product_6,axiom,
product(b,c,u),
file('theBenchmark.p',product_6) ).
cnf(c_32,plain,
product(b,c,u),
inference(clausify,[status(thm)],[product_6]) ).
fof(not_sum_7,axiom,
~ sum(additive_identity,c,additive_identity),
file('theBenchmark.p',not_sum_7) ).
cnf(c_33,plain,
~ sum(additive_identity,c,additive_identity),
inference(clausify,[status(thm)],[not_sum_7]) ).
fof(not_product_8,axiom,
~ product(multiplicative_identity,a,b),
file('theBenchmark.p',not_product_8) ).
cnf(c_34,plain,
~ product(multiplicative_identity,a,b),
inference(clausify,[status(thm)],[not_product_8]) ).
cnf(c_73,plain,
product(multiplicative_identity,multiplicative_identity,multiplicative_identity),
inference(resolve,[status(thm)],[c_17,c_8]) ).
cnf(c_101,plain,
product(multiplicative_identity,a,a),
inference(resolve,[status(thm)],[c_27,c_8]) ).
cnf(c_117,plain,
product(multiplicative_identity,b,b),
inference(resolve,[status(thm)],[c_28,c_8]) ).
cnf(c_2007,plain,
( sum(additive_identity,c,additive_identity)
| product(multiplicative_inverse(c),c,multiplicative_identity) ),
inference(resolve,[status(thm)],[c_29,c_9]) ).
cnf(c_132,plain,
product(multiplicative_inverse(c),c,multiplicative_identity),
inference(resolve,[status(thm)],[c_33,c_2007]) ).
cnf(c_154,plain,
product(c,a,u),
inference(resolve,[status(thm)],[c_31,c_10]) ).
cnf(c_162,plain,
product(c,b,u),
inference(resolve,[status(thm)],[c_32,c_10]) ).
cnf(c_2008,plain,
( ~ product(B,C,b)
| ~ product(A,C,a)
| ~ product(multiplicative_identity,A,B) ),
inference(resolve,[status(thm)],[c_6,c_34]) ).
cnf(c_2009,plain,
( ~ product(multiplicative_identity,A,b)
| ~ product(multiplicative_identity,A,a) ),
inference(resolve,[status(thm)],[c_2008,c_73]) ).
cnf(c_350,plain,
~ product(multiplicative_identity,b,a),
inference(resolve,[status(thm)],[c_2009,c_117]) ).
cnf(c_2010,plain,
( ~ product(A,C,a)
| ~ product(B,b,C)
| ~ product(A,B,multiplicative_identity) ),
inference(resolve,[status(thm)],[c_7,c_350]) ).
cnf(c_2011,plain,
( ~ product(multiplicative_inverse(c),A,a)
| ~ product(c,b,A) ),
inference(resolve,[status(thm)],[c_2010,c_132]) ).
cnf(c_1638,plain,
~ product(multiplicative_inverse(c),u,a),
inference(resolve,[status(thm)],[c_2011,c_162]) ).
cnf(c_2012,plain,
( ~ product(B,C,a)
| ~ product(A,C,u)
| ~ product(multiplicative_inverse(c),A,B) ),
inference(resolve,[status(thm)],[c_6,c_1638]) ).
cnf(c_2013,plain,
( ~ product(A,a,a)
| ~ product(multiplicative_inverse(c),c,A) ),
inference(resolve,[status(thm)],[c_2012,c_154]) ).
cnf(c_2014,plain,
~ product(multiplicative_inverse(c),c,multiplicative_identity),
inference(resolve,[status(thm)],[c_2013,c_101]) ).
cnf(c_2006,plain,
$false,
inference(resolve,[status(thm)],[c_132,c_2014]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : FLD035-3 : TPTP v9.3.1. Bugfixed v2.1.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.08/0.34 % Computer : n008.cluster.edu
% 0.08/0.34 % Model : x86_64 x86_64
% 0.08/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.34 % Memory : 8046.5625MB
% 0.08/0.34 % OS : Linux 6.8.0-71-generic
% 0.08/0.34 % CPULimit : 300
% 0.08/0.34 % WCLimit : 300
% 0.08/0.34 % DateTime : Sun Sep 27 02:26:40 UTC 2026
% 0.08/0.35 % CPUTime :
% 0.08/0.35 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.08/0.35 % Process 833657 was started by sandbox on n008,
% 0.08/0.35 % Sun Sep 27 02:26:40 2026
% 0.08/0.35 % The command was "/export/starexec/sandbox/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p".
% 0.08/0.35
% 0.08/0.35 % From the command line: assign(max_seconds, 300).
% 1.92/0.77
% 1.92/0.77 % SZS status Unsatisfiable for theBenchmark
% 1.92/0.77
% 1.92/0.77 % Proof 1 at 0.22 (+ 0.06) seconds.
% 1.92/0.77 % Length of proof is 22.
% 1.92/0.77 % Level of proof is 4.
% 1.92/0.77 % Maximum clause weight is 21.000.
% 1.92/0.77 % Given clauses 372.
% 1.92/0.77
% 1.92/0.77 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------