%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : GRP417-1 : 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 07:20:57 AM UTC 2026
% Result : Unsatisfiable 18.60s 8.25s
% Output : Refutation 18.60s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 2
% Syntax : Number of formulae : 5 ( 5 unt; 0 typ; 0 def)
% Number of atoms : 5 ( 4 equ; 0 cnn)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 56 ( 2 ~; 0 |; 0 &; 54 @)
% ( 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 : 7 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 6 ( 0 ^; 6 !; 0 ?; 6 :)
% Comments :
%------------------------------------------------------------------------------
thf(multiply_decl,type,
multiply: $i > $i > $i ).
thf(a3_decl,type,
a3: $i ).
thf(b3_decl,type,
b3: $i ).
thf(c3_decl,type,
c3: $i ).
thf(inverse_decl,type,
inverse: $i > $i ).
thf(1,negated_conjecture,
( ( c3 @ ( b3 @ ( a3 @ multiply ) @ multiply ) )
!= ( c3 @ ( b3 @ multiply ) @ ( a3 @ multiply ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_these_axioms_3) ).
thf(3,plain,
( ( c3 @ ( b3 @ ( a3 @ multiply ) @ multiply ) )
!= ( c3 @ ( b3 @ multiply ) @ ( a3 @ multiply ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(2,axiom,
! [C: $i,B: $i,A: $i] :
( ( A @ ( A @ inverse @ multiply ) @ inverse @ ( C @ inverse @ ( B @ multiply ) @ ( A @ ( B @ multiply ) @ inverse @ multiply ) @ inverse @ multiply ) @ inverse @ ( A @ multiply ) @ inverse )
= C ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',single_axiom) ).
thf(6,plain,
! [C: $i,B: $i,A: $i] :
( ( A @ ( A @ inverse @ multiply ) @ inverse @ ( C @ inverse @ ( B @ multiply ) @ ( A @ ( B @ multiply ) @ inverse @ multiply ) @ inverse @ multiply ) @ inverse @ ( A @ multiply ) @ inverse )
= C ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(159,plain,
$false,
inference(e,[status(thm)],[3,6]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : GRP417-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.12 % 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
% 0.23/0.49 % Computer : n006.cluster.edu
% 0.23/0.49 % Model : x86_64 x86_64
% 0.23/0.49 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.23/0.49 % Memory : 8046.5625MB
% 0.23/0.49 % OS : Linux 6.8.0-71-generic
% 0.23/0.49 % CPULimit : 300
% 0.23/0.49 % WCLimit : 300
% 0.23/0.49 % DateTime : Fri Sep 25 14:52:26 UTC 2026
% 0.23/0.50 % CPUTime :
% 0.23/0.50 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
% 1.43/1.32 % [INFO] Parsing problem /export/starexec/sandbox2/benchmark/theBenchmark.p ...
% 1.80/1.57 % [INFO] Parsing done (247ms).
% 1.80/1.59 % [INFO] Running in sequential loop mode.
% 2.88/2.22 % [INFO] eprover registered as external prover.
% 2.88/2.24 % [INFO] Scanning for conjecture ...
% 3.07/2.35 % [INFO] Found a conjecture (or negated_conjecture) and 1 axioms. Running axiom selection ...
% 3.07/2.40 % [INFO] Axiom selection finished. Selected 1 axioms (removed 0 axioms).
% 3.23/2.41 % [INFO] Problem is propositional (TPTP CNF).
% 3.23/2.42 % [INFO] Type checking passed.
% 3.23/2.43 % [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 ...
% 18.60/8.24 % External prover 'e' found a proof!
% 18.60/8.24 % [INFO] Killing All external provers ...
% 18.60/8.24 % Time passed: 7544ms (effective reasoning time: 6639ms)
% 18.60/8.25 % Axioms used in derivation (1): single_axiom
% 18.60/8.25 % No. of inferences in proof: 5
% 18.60/8.25 % SZS status Unsatisfiable for /export/starexec/sandbox2/benchmark/theBenchmark.p : 7544 ms resp. 6639 ms w/o parsing
% 18.60/8.28 % SZS output start Refutation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% See solution above
% 18.60/8.28 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------