%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : GRP550-1 : TPTP v9.3.1. Released v2.6.0.
% Transfm : none
% Format : tptp:raw
% Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox2/solver/bin/leo3.jar /export/starexec/sandbox2/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox2/solver/bin/externals/eprover --instantiate 39
% Computer : n006.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 07:21:15 AM UTC 2026
% Result : Unsatisfiable 4.97s 3.20s
% Output : Refutation 4.97s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 5
% Syntax : Number of formulae : 11 ( 11 unt; 0 typ; 0 def)
% Number of atoms : 11 ( 10 equ; 0 cnn)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 54 ( 2 ~; 0 |; 0 &; 52 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 8 ( 6 usr; 4 con; 0-2 aty)
% Number of variables : 14 ( 0 ^; 14 !; 0 ?; 14 :)
% Comments :
%------------------------------------------------------------------------------
thf(multiply_decl,type,
multiply: $i > $i > $i ).
thf(inverse_decl,type,
inverse: $i > $i ).
thf(b2_decl,type,
b2: $i ).
thf(a2_decl,type,
a2: $i ).
thf(divide_decl,type,
divide: $i > $i > $i ).
thf(identity_decl,type,
identity: $i ).
thf(1,negated_conjecture,
( ( a2 @ ( b2 @ ( b2 @ inverse @ multiply ) @ multiply ) )
!= a2 ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_these_axioms_2) ).
thf(6,plain,
( ( a2 @ ( b2 @ ( b2 @ inverse @ multiply ) @ multiply ) )
!= a2 ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(2,axiom,
! [C: $i,B: $i,A: $i] :
( ( B @ ( C @ ( A @ ( B @ divide ) @ divide ) @ divide ) @ ( A @ ( identity @ divide ) @ divide ) )
= C ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',single_axiom) ).
thf(9,plain,
! [C: $i,B: $i,A: $i] :
( ( B @ ( C @ ( A @ ( B @ divide ) @ divide ) @ divide ) @ ( A @ ( identity @ divide ) @ divide ) )
= C ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,axiom,
! [A: $i] :
( ( A @ inverse )
= ( A @ ( identity @ divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',inverse) ).
thf(13,plain,
! [A: $i] :
( ( A @ inverse )
= ( A @ ( identity @ divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(3,axiom,
! [B: $i,A: $i] :
( ( B @ ( A @ multiply ) )
= ( B @ ( identity @ divide ) @ ( A @ divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',multiply) ).
thf(11,plain,
! [B: $i,A: $i] :
( ( B @ ( A @ multiply ) )
= ( B @ ( identity @ divide ) @ ( A @ divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(5,axiom,
! [A: $i] :
( identity
= ( A @ ( A @ divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',identity) ).
thf(15,plain,
! [A: $i] :
( identity
= ( A @ ( A @ divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).
thf(17,plain,
$false,
inference(e,[status(thm)],[6,9,13,11,15]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : GRP550-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.13 % Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox2/solver/bin/leo3.jar /export/starexec/sandbox2/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox2/solver/bin/externals/eprover --instantiate 39
% 0.24/0.49 % Computer : n006.cluster.edu
% 0.24/0.49 % Model : x86_64 x86_64
% 0.24/0.49 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.24/0.49 % Memory : 8046.5625MB
% 0.24/0.49 % OS : Linux 6.8.0-71-generic
% 0.24/0.50 % CPULimit : 300
% 0.24/0.50 % WCLimit : 300
% 0.24/0.50 % DateTime : Fri Sep 25 14:59:11 UTC 2026
% 0.24/0.50 % CPUTime :
% 0.24/0.50 Running java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox2/solver/bin/leo3.jar /export/starexec/sandbox2/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox2/solver/bin/externals/eprover --instantiate 39
% 1.44/1.37 % [INFO] Parsing problem /export/starexec/sandbox2/benchmark/theBenchmark.p ...
% 1.97/1.63 % [INFO] Parsing done (256ms).
% 1.97/1.65 % [INFO] Running in sequential loop mode.
% 2.86/2.27 % [INFO] eprover registered as external prover.
% 2.86/2.29 % [INFO] Scanning for conjecture ...
% 3.25/2.40 % [INFO] Found a conjecture (or negated_conjecture) and 4 axioms. Running axiom selection ...
% 3.25/2.45 % [INFO] Axiom selection finished. Selected 4 axioms (removed 0 axioms).
% 3.25/2.47 % [INFO] Problem is propositional (TPTP CNF).
% 3.25/2.48 % [INFO] Type checking passed.
% 3.25/2.48 % [CONFIG] Using configuration: timeout(300) with strategy<name(default),share(1.0),primSubst(3),sos(false),unifierCount(4),uniDepth(8),boolExt(true),choice(true),renaming(true),funcspec(false), domConstr(0),specialInstances(39),restrictUniAttempts(true),termOrdering(CPO)>. Searching for refutation ...
% 4.86/3.20 % External prover 'e' found a proof!
% 4.97/3.20 % [INFO] Killing All external provers ...
% 4.97/3.20 % Time passed: 2493ms (effective reasoning time: 1538ms)
% 4.97/3.20 % Axioms used in derivation (4): single_axiom, inverse, multiply, identity
% 4.97/3.20 % No. of inferences in proof: 11
% 4.97/3.20 % SZS status Unsatisfiable for /export/starexec/sandbox2/benchmark/theBenchmark.p : 2493 ms resp. 1538 ms w/o parsing
% 4.97/3.26 % SZS output start Refutation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% See solution above
% 4.97/3.26 % [INFO] Killing All external provers ...
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