%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : GRP533-1 : TPTP v9.3.1. Released v2.6.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n012.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 07:30:18 AM UTC 2026
% Result : Unsatisfiable 0.02s 0.31s
% Output : CNFRefutation 0.02s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 4
% Syntax : Number of formulae : 20 ( 20 unt; 0 def)
% Number of atoms : 20 ( 19 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 9 ( 9 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 4 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 6 ( 6 usr; 3 con; 0-2 aty)
% Number of variables : 18 ( 0 sgn 6 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(multiply,axiom,
! [VAR_0,VAR_1,VAR_2] : multiply(VAR_0,VAR_1) = divide(VAR_0,divide(divide(VAR_2,VAR_2),VAR_1)),
file('theBenchmark.p',multiply) ).
cnf(c_2,plain,
multiply(A,B) = divide(A,divide(divide(C,C),B)),
inference(clausify,[status(thm)],[multiply]) ).
fof(inverse,axiom,
! [VAR_0,VAR_1] : inverse(VAR_0) = divide(divide(VAR_1,VAR_1),VAR_0),
file('theBenchmark.p',inverse) ).
cnf(c_3,plain,
inverse(A) = divide(divide(B,B),A),
inference(clausify,[status(thm)],[inverse]) ).
cnf(c_4,plain,
divide(divide(A,A),B) = inverse(B),
inference(copy,[status(thm)],[c_3]) ).
fof(identity,axiom,
! [VAR_0] : identity = divide(VAR_0,VAR_0),
file('theBenchmark.p',identity) ).
cnf(c_5,plain,
identity = divide(A,A),
inference(clausify,[status(thm)],[identity]) ).
cnf(c_6,plain,
divide(A,A) = identity,
inference(copy,[status(thm)],[c_5]) ).
fof(prove_these_axioms_1,axiom,
multiply(inverse(a1),a1) != multiply(inverse(b1),b1),
file('theBenchmark.p',prove_these_axioms_1) ).
cnf(c_7,plain,
multiply(inverse(a1),a1) != multiply(inverse(b1),b1),
inference(clausify,[status(thm)],[prove_these_axioms_1]) ).
cnf(c_8,plain,
multiply(inverse(b1),b1) != multiply(inverse(a1),a1),
inference(copy,[status(thm)],[c_7]) ).
cnf(c_9,plain,
multiply(A,B) = divide(A,divide(identity,B)),
inference(paramod,[status(thm)],[c_6,c_2]) ).
cnf(c_10,plain,
divide(identity,A) = inverse(A),
inference(paramod,[status(thm)],[c_6,c_4]) ).
cnf(c_12,plain,
divide(inverse(b1),divide(identity,b1)) != multiply(inverse(a1),a1),
inference(paramod,[status(thm)],[c_9,c_8]) ).
cnf(c_13,plain,
divide(inverse(b1),inverse(b1)) != multiply(inverse(a1),a1),
inference(paramod,[status(thm)],[c_10,c_12]) ).
cnf(c_14,plain,
identity != multiply(inverse(a1),a1),
inference(paramod,[status(thm)],[c_6,c_13]) ).
cnf(c_15,plain,
identity != divide(inverse(a1),divide(identity,a1)),
inference(paramod,[status(thm)],[c_9,c_14]) ).
cnf(c_16,plain,
identity != divide(inverse(a1),inverse(a1)),
inference(paramod,[status(thm)],[c_10,c_15]) ).
cnf(c_17,plain,
identity != identity,
inference(paramod,[status(thm)],[c_6,c_16]) ).
cnf(c_11,plain,
$false,
inference(copy,[status(thm)],[c_17]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : GRP533-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.02 % Command : prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.02/0.29 % Computer : n012.cluster.edu
% 0.02/0.29 % Model : x86_64 x86_64
% 0.02/0.29 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.02/0.29 % Memory : 8046.5625MB
% 0.02/0.29 % OS : Linux 6.8.0-71-generic
% 0.02/0.29 % CPULimit : 300
% 0.02/0.29 % WCLimit : 300
% 0.02/0.29 % DateTime : Fri Sep 25 14:58:35 UTC 2026
% 0.02/0.29 % CPUTime :
% 0.02/0.29 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.02/0.29 % Process 2377756 was started by sandbox on n012,
% 0.02/0.29 % Fri Sep 25 14:58:35 2026
% 0.02/0.29 % The command was "/export/starexec/sandbox/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox/benchmark/theBenchmark.p".
% 0.02/0.30
% 0.02/0.30 % From the command line: assign(max_seconds, 300).
% 0.02/0.31
% 0.02/0.31 % SZS status Unsatisfiable for theBenchmark
% 0.02/0.31
% 0.02/0.31 % Proof 1 at 0.00 (+ 0.00) seconds.
% 0.02/0.31 % Length of proof is 10.
% 0.02/0.31 % Level of proof is 3.
% 0.02/0.31 % Maximum clause weight is 11.000.
% 0.02/0.31 % Given clauses 0.
% 0.02/0.31
% 0.02/0.31 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------