%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : LCL730^5 : TPTP v9.3.1. Released v4.0.0.
% 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 : n026.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 08:14:13 AM UTC 2026
% Result : Theorem 4.41s 2.46s
% Output : Refutation 4.66s
% Verified :
% SZS Type : Refutation
% Derivation depth : 6
% Number of leaves : 9
% Syntax : Number of formulae : 19 ( 11 unt; 0 typ; 8 def)
% Number of atoms : 27 ( 8 equ; 0 cnn)
% Maximal formula atoms : 4 ( 1 avg)
% Number of connectives : 121 ( 16 ~; 2 |; 4 &; 82 @)
% ( 0 <=>; 17 =>; 0 <=; 0 <~>)
% Maximal formula depth : 11 ( 4 avg)
% Number of types : 2 ( 1 usr)
% Number of type conns : 76 ( 76 >; 0 *; 0 +; 0 <<)
% Number of symbols : 10 ( 8 usr; 3 con; 0-2 aty)
% Number of variables : 69 ( 4 ^; 28 !; 22 ?; 69 :)
% ( 0 !>; 0 ?*; 0 @-; 15 @+)
% Comments :
%------------------------------------------------------------------------------
thf(b_type,type,
b: $tType ).
thf(sk1_decl,type,
sk1: ( ( b > $o ) > b > $o ) > b > $o ).
thf(sk2_decl,type,
sk2: ( ( b > $o ) > b > $o ) > ( b > $o ) > b ).
thf(sk3_decl,type,
sk3: b > $o ).
thf(sk4_decl,type,
sk4: b ).
thf(sk5_decl,type,
sk5: ( ( b > $o ) > b > $o ) > b > $o ).
thf(sk6_decl,type,
sk6: ( ( b > $o ) > b > $o ) > ( b > $o ) > b ).
thf(sk7_decl,type,
sk7: b > $o ).
thf(sk8_decl,type,
sk8: b ).
thf(sk1_def,definition,
( sk1
= ( ^ [A: ( b > $o ) > b > $o] :
@+[B: b > $o] :
~ ? [C: b] : ( A @ B @ C ) ) ) ).
thf(sk2_def,definition,
( sk2
= ( ^ [A: ( b > $o ) > b > $o] :
@+[B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) ) ) ).
thf(sk3_def,definition,
( sk3
= ( @+[A: b > $o] :
~ ( ? [B: b] : ( A @ B )
=> ( A
@ @+[B: b] : ( A @ B ) ) ) ) ) ).
thf(sk4_def,definition,
( sk4
= ( @+[A: b] : ( sk3 @ A ) ) ) ).
thf(sk5_def,definition,
( sk5
= ( ^ [A: ( b > $o ) > b > $o] :
@+[B: b > $o] :
~ ? [C: b] : ( A @ B @ C ) ) ) ).
thf(sk6_def,definition,
( sk6
= ( ^ [A: ( b > $o ) > b > $o] :
@+[B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) ) ) ).
thf(sk7_def,definition,
( sk7
= ( @+[A: b > $o] :
~ ( ? [B: b] : ( A @ B )
=> ( A
@ @+[B: b] :
~ ( A @ B ) ) ) ) ) ).
thf(sk8_def,definition,
( sk8
= ( @+[A: b] : ( sk7 @ A ) ) ) ).
thf(1,conjecture,
( ! [A: ( b > $o ) > b > $o] :
( ! [B: b > $o] :
? [C: b] : ( A @ B @ C )
=> ? [B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) )
=> ? [A: ( b > $o ) > b] :
! [B: b > $o] :
( ? [C: b] : ( B @ C )
=> ( B @ ( A @ B ) ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',cX5310) ).
thf(2,negated_conjecture,
~ ( ! [A: ( b > $o ) > b > $o] :
( ! [B: b > $o] :
? [C: b] : ( A @ B @ C )
=> ? [B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) )
=> ? [A: ( b > $o ) > b] :
! [B: b > $o] :
( ? [C: b] : ( B @ C )
=> ( B @ ( A @ B ) ) ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(3,plain,
~ ( ! [A: ( b > $o ) > b > $o] :
( ! [B: b > $o] :
? [C: b] : ( A @ B @ C )
=> ? [B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) )
=> ? [A: ( b > $o ) > b] :
! [B: b > $o] :
( ? [C: b] : ( B @ C )
=> ( B @ ( A @ B ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,plain,
~ ( ! [A: ( b > $o ) > b > $o] :
( ! [B: b > $o] :
? [C: b] : ( A @ B @ C )
=> ? [B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) )
=> ! [A: b > $o] :
( ? [B: b] : ( A @ B )
=> ( A
@ @+[B: b] : ( A @ B ) ) ) ),
inference(instance,[status(thm)],[3]) ).
thf(6,plain,
! [C: b > $o,B: b,A: ( b > $o ) > b > $o] :
( ( ~ ( A @ ( sk1 @ A ) @ B )
| ( A @ C @ ( sk2 @ A @ C ) ) )
& ( sk3 @ sk4 )
& ~ ( sk3
@ @+[D: b] : ( sk3 @ D ) ) ),
inference(cnf,[status(esa)],[4]) ).
thf(8,plain,
sk3 @ sk4,
inference(cnfConj,[status(thm)],[6]) ).
thf(9,plain,
~ ( sk3
@ @+[A: b] : ( sk3 @ A ) ),
inference(cnfConj,[status(thm)],[6]) ).
thf(5,plain,
~ ( ! [A: ( b > $o ) > b > $o] :
( ! [B: b > $o] :
? [C: b] : ( A @ B @ C )
=> ? [B: ( b > $o ) > b] :
! [C: b > $o] : ( A @ C @ ( B @ C ) ) )
=> ! [A: b > $o] :
( ? [B: b] : ( A @ B )
=> ( A
@ @+[B: b] :
~ ( A @ B ) ) ) ),
inference(instance,[status(thm)],[3]) ).
thf(10,plain,
! [C: b > $o,B: b,A: ( b > $o ) > b > $o] :
( ( ~ ( A @ ( sk5 @ A ) @ B )
| ( A @ C @ ( sk6 @ A @ C ) ) )
& ( sk7 @ sk8 )
& ~ ( sk7
@ @+[D: b] :
~ ( sk7 @ D ) ) ),
inference(cnf,[status(esa)],[5]) ).
thf(12,plain,
sk7 @ sk8,
inference(cnfConj,[status(thm)],[10]) ).
thf(35,plain,
$false,
inference(e,[status(thm)],[3,8,9,12]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : LCL730^5 : TPTP v9.3.1. Released v4.0.0.
% 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
% 0.10/0.22 % Computer : n026.cluster.edu
% 0.10/0.22 % Model : x86_64 x86_64
% 0.10/0.22 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.22 % Memory : 8046.5625MB
% 0.10/0.22 % OS : Linux 6.8.0-71-generic
% 0.10/0.22 % CPULimit : 300
% 0.10/0.22 % WCLimit : 300
% 0.10/0.22 % DateTime : Tue Sep 29 10:05:53 UTC 2026
% 0.10/0.22 % CPUTime :
% 0.10/0.22 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
% 1.04/0.80 % [INFO] Parsing problem /export/starexec/sandbox2/benchmark/theBenchmark.p ...
% 1.23/0.99 % [INFO] Parsing done (186ms).
% 1.23/1.01 % [INFO] Running in sequential loop mode.
% 2.01/1.42 % [INFO] eprover registered as external prover.
% 2.01/1.43 % [INFO] Scanning for conjecture ...
% 2.21/1.51 % [INFO] Found a conjecture (or negated_conjecture) and 0 axioms. Running axiom selection ...
% 2.21/1.55 % [INFO] Axiom selection finished. Selected 0 axioms (removed 0 axioms).
% 2.21/1.55 % [INFO] Problem is higher-order (TPTP THF).
% 2.21/1.56 % [INFO] Type checking passed.
% 2.21/1.56 % [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 ...
% 4.41/2.45 % External prover 'e' found a proof!
% 4.41/2.45 % [INFO] Killing All external provers ...
% 4.41/2.45 % Time passed: 2086ms (effective reasoning time: 1441ms)
% 4.41/2.45 % 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)>
% 4.41/2.46 % Axioms used in derivation (0):
% 4.41/2.46 % No. of inferences in proof: 11
% 4.41/2.46 % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : 2086 ms resp. 1441 ms w/o parsing
% 4.66/2.53 % SZS output start Refutation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% See solution above
% 4.66/2.53 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------