%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : GRP581-1 : 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 : n020.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 07:21:19 AM UTC 2026
% Result : Unsatisfiable 3.40s 12.31s
% Output : Refutation 3.40s
% 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 : 60 ( 2 ~; 0 |; 0 &; 58 @)
% ( 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 : 7 ( 5 usr; 3 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(a1_decl,type,
a1: $i ).
thf(identity_decl,type,
identity: $i ).
thf(double_divide_decl,type,
double_divide: $i > $i > $i ).
thf(1,negated_conjecture,
( ( a1 @ ( a1 @ inverse @ multiply ) )
!= identity ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_these_axioms_1) ).
thf(6,plain,
( ( a1 @ ( a1 @ inverse @ multiply ) )
!= identity ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(2,axiom,
! [C: $i,B: $i,A: $i] :
( ( identity @ ( identity @ double_divide ) @ ( A @ ( B @ double_divide ) @ ( C @ double_divide ) @ ( B @ ( identity @ double_divide ) @ double_divide ) @ ( A @ double_divide ) @ double_divide ) )
= C ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',single_axiom) ).
thf(9,plain,
! [C: $i,B: $i,A: $i] :
( ( identity @ ( identity @ double_divide ) @ ( A @ ( B @ double_divide ) @ ( C @ double_divide ) @ ( B @ ( identity @ double_divide ) @ double_divide ) @ ( A @ double_divide ) @ double_divide ) )
= C ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,axiom,
! [A: $i] :
( ( A @ inverse )
= ( identity @ ( A @ double_divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',inverse) ).
thf(13,plain,
! [A: $i] :
( ( A @ inverse )
= ( identity @ ( A @ double_divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(3,axiom,
! [B: $i,A: $i] :
( ( B @ ( A @ multiply ) )
= ( identity @ ( A @ ( B @ double_divide ) @ double_divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',multiply) ).
thf(11,plain,
! [B: $i,A: $i] :
( ( B @ ( A @ multiply ) )
= ( identity @ ( A @ ( B @ double_divide ) @ double_divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(5,axiom,
! [A: $i] :
( identity
= ( A @ inverse @ ( A @ double_divide ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',identity) ).
thf(15,plain,
! [A: $i] :
( identity
= ( A @ inverse @ ( A @ double_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 : GRP581-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.11 % 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
% 0.22/10.46 % Computer : n020.cluster.edu
% 0.22/10.46 % Model : x86_64 x86_64
% 0.22/10.46 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.22/10.46 % Memory : 8046.5625MB
% 0.22/10.46 % OS : Linux 6.8.0-71-generic
% 0.22/10.46 % CPULimit : 300
% 0.22/10.46 % WCLimit : 300
% 0.22/10.46 % DateTime : Fri Sep 25 15:01:44 UTC 2026
% 0.22/10.47 % CPUTime :
% 0.22/10.47 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
% 1.03/11.05 % [INFO] Parsing problem /export/starexec/sandbox2/benchmark/theBenchmark.p ...
% 1.33/11.23 % [INFO] Parsing done (178ms).
% 1.33/11.25 % [INFO] Running in sequential loop mode.
% 1.92/11.65 % [INFO] eprover registered as external prover.
% 1.92/11.66 % [INFO] Scanning for conjecture ...
% 2.13/11.75 % [INFO] Found a conjecture (or negated_conjecture) and 4 axioms. Running axiom selection ...
% 2.13/11.78 % [INFO] Axiom selection finished. Selected 4 axioms (removed 0 axioms).
% 2.13/11.79 % [INFO] Problem is propositional (TPTP CNF).
% 2.13/11.80 % [INFO] Type checking passed.
% 2.29/11.80 % [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 ...
% 3.40/12.31 % External prover 'e' found a proof!
% 3.40/12.31 % [INFO] Killing All external provers ...
% 3.40/12.31 % Time passed: 1700ms (effective reasoning time: 1057ms)
% 3.40/12.31 % Axioms used in derivation (4): single_axiom, inverse, multiply, identity
% 3.40/12.31 % No. of inferences in proof: 11
% 3.40/12.31 % SZS status Unsatisfiable for /export/starexec/sandbox2/benchmark/theBenchmark.p : 1700 ms resp. 1057 ms w/o parsing
% 3.40/12.35 % SZS output start Refutation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% See solution above
% 3.40/12.35 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------