%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : SEU550^2 : TPTP v9.3.1. Bugfixed v5.2.0.
% 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 : 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 : Wed Sep 30 08:28:30 AM UTC 2026
% Result : Theorem 3.14s 2.07s
% Output : Refutation 3.41s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 4
% Syntax : Number of formulae : 14 ( 8 unt; 0 typ; 3 def)
% Number of atoms : 79 ( 44 equ; 0 cnn)
% Maximal formula atoms : 3 ( 5 avg)
% Number of connectives : 107 ( 11 ~; 3 |; 16 &; 52 @)
% ( 0 <=>; 25 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 4 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 10 ( 10 >; 0 *; 0 +; 0 <<)
% Number of symbols : 5 ( 3 usr; 1 con; 0-2 aty)
% Number of variables : 57 ( 1 ^; 39 !; 15 ?; 57 :)
% ( 0 !>; 0 ?*; 0 @-; 2 @+)
% Comments :
%------------------------------------------------------------------------------
thf(exu_decl,type,
exu: ( $i > $o ) > $o ).
thf(sk1_decl,type,
sk1: $i > $o ).
thf(sk2_decl,type,
sk2: $i > $o ).
thf(exu_def,definition,
( exu
= ( ^ [A: $i > $o] :
? [B: $i] :
( ( A @ B )
& ! [C: $i] :
( ( A @ C )
=> ( B = C ) ) ) ) ) ).
thf(sk1_def,definition,
( sk1
= ( @+[A: $i > $o] :
~ ! [B: $i > $o] :
( ! [C: $i,D: $i] :
( ( C = D )
=> ( ( A @ C )
= ( B @ D ) ) )
=> ( ( ? [C: $i] :
( ( A @ C )
& ! [D: $i] :
( ( A @ D )
=> ( C = D ) ) ) )
= ( ? [C: $i] :
( ( B @ C )
& ! [D: $i] :
( ( B @ D )
=> ( C = D ) ) ) ) ) ) ) ) ).
thf(sk2_def,definition,
( sk2
= ( @+[A: $i > $o] :
~ ( ! [B: $i,C: $i] :
( ( B = C )
=> ( ( sk1 @ B )
= ( A @ C ) ) )
=> ( ( ? [B: $i] :
( ( sk1 @ B )
& ! [C: $i] :
( ( sk1 @ C )
=> ( B = C ) ) ) )
= ( ? [B: $i] :
( ( A @ B )
& ! [C: $i] :
( ( A @ C )
=> ( B = C ) ) ) ) ) ) ) ) ).
thf(1,conjecture,
! [A: $i > $o,B: $i > $o] :
( ! [C: $i,D: $i] :
( ( C = D )
=> ( ( A @ C )
= ( B @ D ) ) )
=> ( ( exu @ A )
= ( exu @ B ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',exu__Cong) ).
thf(2,negated_conjecture,
~ ! [A: $i > $o,B: $i > $o] :
( ! [C: $i,D: $i] :
( ( C = D )
=> ( ( A @ C )
= ( B @ D ) ) )
=> ( ( exu @ A )
= ( exu @ B ) ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(3,plain,
~ ! [A: $i > $o,B: $i > $o] :
( ! [C: $i,D: $i] :
( ( C = D )
=> ( ( A @ C )
= ( B @ D ) ) )
=> ( ( ? [C: $i] :
( ( A @ C )
& ! [D: $i] :
( ( A @ D )
=> ( C = D ) ) ) )
= ( ? [C: $i] :
( ( B @ C )
& ! [D: $i] :
( ( B @ D )
=> ( C = D ) ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,plain,
! [B: $i,A: $i] :
( ( ( A != B )
| ( ( sk1 @ A )
= ( sk2 @ B ) ) )
& ( ( ? [C: $i] :
( ( sk1 @ C )
& ! [D: $i] :
( ( sk1 @ D )
=> ( C = D ) ) ) )
!= ( ? [C: $i] :
( ( sk2 @ C )
& ! [D: $i] :
( ( sk2 @ D )
=> ( C = D ) ) ) ) ) ),
inference(cnf,[status(esa)],[3]) ).
thf(6,plain,
( ( ? [A: $i] :
( ( sk1 @ A )
& ! [B: $i] :
( ( sk1 @ B )
=> ( A = B ) ) ) )
!= ( ? [A: $i] :
( ( sk2 @ A )
& ! [B: $i] :
( ( sk2 @ B )
=> ( A = B ) ) ) ) ),
inference(cnfConj,[status(thm)],[4]) ).
thf(9,plain,
( ( ? [A: $i] :
( ( sk2 @ A )
& ! [B: $i] :
( ( sk2 @ B )
=> ( A = B ) ) ) )
!= ( ? [A: $i] :
( ( sk1 @ A )
& ! [B: $i] :
( ( sk1 @ B )
=> ( A = B ) ) ) ) ),
inference(lifteq,[status(thm)],[6]) ).
thf(5,plain,
! [B: $i,A: $i] :
( ( A != B )
| ( ( sk1 @ A )
= ( sk2 @ B ) ) ),
inference(cnfConj,[status(thm)],[4]) ).
thf(7,plain,
! [B: $i,A: $i] :
( ( A != B )
| ( ( sk1 @ A )
= ( sk2 @ B ) ) ),
inference(lifteq,[status(thm)],[5]) ).
thf(8,plain,
! [A: $i] :
( ( sk2 @ A )
= ( sk1 @ A ) ),
inference(simp,[status(thm)],[7]) ).
thf(12,plain,
( ( ? [A: $i] :
( ( sk1 @ A )
& ! [B: $i] :
( ( sk1 @ B )
=> ( A = B ) ) ) )
!= ( ? [A: $i] :
( ( sk1 @ A )
& ! [B: $i] :
( ( sk1 @ B )
=> ( A = B ) ) ) ) ),
inference(rewrite,[status(thm)],[9,8]) ).
thf(13,plain,
$false,
inference(simp,[status(thm)],[12]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SEU550^2 : TPTP v9.3.1. Bugfixed v5.2.0.
% 0.00/0.08 % 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
% 0.09/0.21 % Computer : n011.cluster.edu
% 0.09/0.21 % Model : x86_64 x86_64
% 0.09/0.21 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.21 % Memory : 8046.5625MB
% 0.09/0.21 % OS : Linux 6.8.0-71-generic
% 0.09/0.21 % CPULimit : 300
% 0.09/0.21 % WCLimit : 300
% 0.09/0.21 % DateTime : Tue Sep 29 13:49:46 UTC 2026
% 0.09/0.22 % CPUTime :
% 0.09/0.22 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
% 0.85/0.79 % [INFO] Parsing problem /export/starexec/sandbox2/benchmark/theBenchmark.p ...
% 1.15/0.97 % [INFO] Parsing done (181ms).
% 1.15/0.98 % [INFO] Running in sequential loop mode.
% 1.70/1.39 % [INFO] eprover registered as external prover.
% 1.70/1.40 % [INFO] Scanning for conjecture ...
% 1.87/1.49 % [INFO] Found a conjecture (or negated_conjecture) and 0 axioms. Running axiom selection ...
% 2.03/1.52 % [INFO] Axiom selection finished. Selected 0 axioms (removed 0 axioms).
% 2.03/1.52 % [INFO] Problem is higher-order (TPTP THF).
% 2.03/1.53 % [INFO] Type checking passed.
% 2.03/1.53 % [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 ...
% 3.14/2.06 % [INFO] Killing All external provers ...
% 3.14/2.07 % Time passed: 1710ms (effective reasoning time: 1074ms)
% 3.14/2.07 % Solved by 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)>
% 3.14/2.07 % Axioms used in derivation (0):
% 3.14/2.07 % No. of inferences in proof: 11
% 3.14/2.07 % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : 1710 ms resp. 1074 ms w/o parsing
% 3.41/2.13 % SZS output start Refutation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% See solution above
% 3.41/2.13 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------