%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : BOO004-2 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n011.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 : Thu Sep 24 12:06:17 PM UTC 2026
% Result : Unsatisfiable 0.13s 15.68s
% Output : CNFRefutation 0.13s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 8
% Syntax : Number of formulae : 23 ( 23 unt; 1 def)
% Number of atoms : 23 ( 22 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 3 ( 3 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 7 ( 7 usr; 4 con; 0-2 aty)
% Number of variables : 20 ( 20 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [X,Y] : add(X,Y) = add(Y,X),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f3,axiom,
! [X,Y,Z] : add(multiply(X,Y),Z) = multiply(add(X,Z),add(Y,Z)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f8,axiom,
! [X] : add(inverse(X),X) = multiplicative_identity,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f9,axiom,
! [X] : multiply(X,inverse(X)) = additive_identity,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f11,axiom,
! [X] : multiply(X,multiplicative_identity) = X,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f13,axiom,
! [X] : add(X,additive_identity) = X,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f15,negated_conjecture,
add(a,a) != a,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f16,plain,
! [X0,X1] : add(X0,X1) = add(X1,X0),
inference(cnf_transformation,[status(thm)],[f1]) ).
fof(f18,plain,
! [X0,X1,X2] : add(multiply(X0,X1),X2) = multiply(add(X0,X2),add(X1,X2)),
inference(cnf_transformation,[status(thm)],[f3]) ).
fof(f23,plain,
! [X0] : add(inverse(X0),X0) = multiplicative_identity,
inference(cnf_transformation,[status(thm)],[f8]) ).
fof(f24,plain,
! [X0] : multiply(X0,inverse(X0)) = additive_identity,
inference(cnf_transformation,[status(thm)],[f9]) ).
fof(f26,plain,
! [X0] : multiply(X0,multiplicative_identity) = X0,
inference(cnf_transformation,[status(thm)],[f11]) ).
fof(f28,plain,
! [X0] : add(X0,additive_identity) = X0,
inference(cnf_transformation,[status(thm)],[f13]) ).
fof(f30,plain,
add(a,a) != a,
inference(cnf_transformation,[status(thm)],[f15]) ).
fof(f31,definition,
sF0_fnc = add(a,a),
introduced(definition,[new_symbols(definition,[sF0_fnc])],[function_definition]) ).
fof(f32,plain,
sF0_fnc != a,
inference(definition_folding,[],[f30,f31]) ).
fof(f39,plain,
! [X0] : add(additive_identity,X0) = X0,
inference(paramodulation,[status(thm)],[f16,f28]) ).
fof(f81,plain,
! [X0] : add(multiply(a,X0),a) = multiply(sF0_fnc,add(X0,a)),
inference(paramodulation,[status(thm)],[f31,f18]) ).
fof(f107,plain,
add(additive_identity,a) = multiply(sF0_fnc,add(inverse(a),a)),
inference(paramodulation,[status(thm)],[f24,f81]) ).
fof(f115,plain,
a = multiply(sF0_fnc,add(inverse(a),a)),
inference(forward_demodulation,[status(thm)],[f39,f107]) ).
fof(f116,plain,
a = multiply(sF0_fnc,multiplicative_identity),
inference(forward_demodulation,[status(thm)],[f23,f115]) ).
fof(f117,plain,
a = sF0_fnc,
inference(forward_demodulation,[status(thm)],[f26,f116]) ).
fof(f118,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f117,f32]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.04 % Problem : BOO004-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.06 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.08/0.34 % Computer : n011.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
% 0.13/15.65 % CPULimit : 300
% 0.13/15.65 % WCLimit : 300
% 0.13/15.65 % DateTime : Mon Sep 21 13:45:57 UTC 2026
% 0.13/15.66 % CPUTime :
% 0.13/15.67 % Drodi V4.1.1
% 0.13/15.68 % Refutation found
% 0.13/15.68 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.13/15.68 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.13/15.69 % Elapsed time: 0.028962 seconds
% 0.13/15.69 % CPU time: 0.038977 seconds
% 0.13/15.69 % Total memory used: 911.280 KB
% 0.13/15.69 % Net memory used: 885.616 KB
%------------------------------------------------------------------------------