%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : LAT008-1 : TPTP v9.3.1. Released v2.2.0.
% Transfm : none
% Format : tptp:raw
% Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% 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 07:46:27 AM UTC 2026
% Result : Unsatisfiable 1.77s 1.30s
% Output : Refutation 1.77s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 3
% Syntax : Number of formulae : 7 ( 7 unt; 0 typ; 0 def)
% Number of atoms : 7 ( 6 equ; 0 cnn)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 38 ( 2 ~; 0 |; 0 &; 36 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 3 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 6 ( 4 usr; 3 con; 0-2 aty)
% Number of variables : 10 ( 0 ^; 10 !; 0 ?; 10 :)
% Comments :
%------------------------------------------------------------------------------
thf(join_decl,type,
join: $i > $i > $i ).
thf(a_decl,type,
a: $i ).
thf(meet_decl,type,
meet: $i > $i > $i ).
thf(b_decl,type,
b: $i ).
thf(1,negated_conjecture,
( ( b @ ( a @ meet ) @ ( a @ join ) )
!= a ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_absorbtion_dual) ).
thf(4,plain,
( ( b @ ( a @ meet ) @ ( a @ join ) )
!= a ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(2,axiom,
! [B: $i,A: $i] :
( ( B @ ( A @ join ) @ ( A @ meet ) )
= A ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',absorption) ).
thf(7,plain,
! [B: $i,A: $i] :
( ( B @ ( A @ join ) @ ( A @ meet ) )
= A ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(3,axiom,
! [C: $i,B: $i,A: $i] :
( ( C @ ( B @ join ) @ ( A @ meet ) )
= ( A @ ( B @ meet ) @ ( A @ ( C @ meet ) @ join ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',distribution) ).
thf(9,plain,
! [C: $i,B: $i,A: $i] :
( ( C @ ( B @ join ) @ ( A @ meet ) )
= ( A @ ( B @ meet ) @ ( A @ ( C @ meet ) @ join ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(14,plain,
$false,
inference(e,[status(thm)],[4,7,9]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : LAT008-1 : TPTP v9.3.1. Released v2.2.0.
% 0.00/0.04 % Command : java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% 0.04/0.37 % Computer : n012.cluster.edu
% 0.04/0.37 % Model : x86_64 x86_64
% 0.04/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.04/0.37 % Memory : 8046.5625MB
% 0.04/0.37 % OS : Linux 6.8.0-71-generic
% 0.04/0.37 % CPULimit : 300
% 0.04/0.37 % WCLimit : 300
% 0.04/0.37 % DateTime : Fri Sep 25 19:56:08 UTC 2026
% 0.04/0.37 % CPUTime :
% 0.04/0.37 Running java -Xss128m -Xmx2g -Xms1g -jar /export/starexec/sandbox/solver/bin/leo3.jar /export/starexec/sandbox/benchmark/theBenchmark.p -t 300 -p --atp eprover=/export/starexec/sandbox/solver/bin/externals/eprover --instantiate 39
% 0.42/0.66 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 0.57/0.74 % [INFO] Parsing done (83ms).
% 0.57/0.75 % [INFO] Running in sequential loop mode.
% 0.86/0.95 % [INFO] eprover registered as external prover.
% 0.86/0.95 % [INFO] Scanning for conjecture ...
% 0.86/0.99 % [INFO] Found a conjecture (or negated_conjecture) and 2 axioms. Running axiom selection ...
% 0.86/1.01 % [INFO] Axiom selection finished. Selected 2 axioms (removed 0 axioms).
% 0.86/1.01 % [INFO] Problem is propositional (TPTP CNF).
% 1.07/1.01 % [INFO] Type checking passed.
% 1.07/1.02 % [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 ...
% 1.49/1.29 % External prover 'e' found a proof!
% 1.49/1.29 % [INFO] Killing All external provers ...
% 1.49/1.29 % Time passed: 847ms (effective reasoning time: 543ms)
% 1.49/1.30 % Axioms used in derivation (2): absorption, distribution
% 1.49/1.30 % No. of inferences in proof: 7
% 1.77/1.30 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : 847 ms resp. 543 ms w/o parsing
% 1.77/1.31 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 1.77/1.31 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------