%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : SET616^5 : TPTP v9.3.1. Released v4.0.0.
% 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 : n016.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 08:23:02 AM UTC 2026
% Result : Theorem 4.00s 2.03s
% Output : Refutation 4.00s
% Verified :
% SZS Type : Refutation
% Derivation depth : 19
% Number of leaves : 3
% Syntax : Number of formulae : 29 ( 13 unt; 0 typ; 2 def)
% Number of atoms : 109 ( 28 equ; 0 cnn)
% Maximal formula atoms : 6 ( 3 avg)
% Number of connectives : 186 ( 52 ~; 19 |; 27 &; 83 @)
% ( 0 <=>; 5 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Number of types : 2 ( 1 usr)
% Number of type conns : 9 ( 9 >; 0 *; 0 +; 0 <<)
% Number of symbols : 6 ( 3 usr; 3 con; 0-2 aty)
% Number of variables : 34 ( 16 ^; 16 !; 0 ?; 34 :)
% ( 0 !>; 0 ?*; 0 @-; 2 @+)
% Comments :
%------------------------------------------------------------------------------
thf(a_type,type,
a: $tType ).
thf(sk1_decl,type,
sk1: a > $o ).
thf(sk2_decl,type,
sk2: a > $o ).
thf(sk3_decl,type,
sk3: a ).
thf(sk1_def,definition,
( sk1
= ( @+[A: a > $o] :
~ ! [B: a > $o] :
( ( ( ^ [C: a] :
( ( A @ C )
& ~ ( B @ C ) ) )
= ( ^ [C: a] :
( ( B @ C )
& ~ ( A @ C ) ) ) )
=> ( A = B ) ) ) ) ).
thf(sk2_def,definition,
( sk2
= ( @+[A: a > $o] :
~ ( ( ( ^ [B: a] :
( ( sk1 @ B )
& ~ ( A @ B ) ) )
= ( ^ [B: a] :
( ( A @ B )
& ~ ( sk1 @ B ) ) ) )
=> ( sk1 = A ) ) ) ) ).
thf(1,conjecture,
! [A: a > $o,B: a > $o] :
( ( ( ^ [C: a] :
( ( A @ C )
& ~ ( B @ C ) ) )
= ( ^ [C: a] :
( ( B @ C )
& ~ ( A @ C ) ) ) )
=> ( A = B ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cBOOL_PROP_90_pme) ).
thf(2,negated_conjecture,
~ ! [A: a > $o,B: a > $o] :
( ( ( ^ [C: a] :
( ( A @ C )
& ~ ( B @ C ) ) )
= ( ^ [C: a] :
( ( B @ C )
& ~ ( A @ C ) ) ) )
=> ( A = B ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(3,plain,
~ ! [A: a > $o,B: a > $o] :
( ( ( ^ [C: a] :
( ( A @ C )
& ~ ( B @ C ) ) )
= ( ^ [C: a] :
( ( B @ C )
& ~ ( A @ C ) ) ) )
=> ( A = B ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,plain,
( ( ( ^ [A: a] :
( ( sk1 @ A )
& ~ ( sk2 @ A ) ) )
= ( ^ [A: a] :
( ( sk2 @ A )
& ~ ( sk1 @ A ) ) ) )
& ( sk1 != sk2 ) ),
inference(cnf,[status(esa)],[3]) ).
thf(6,plain,
sk1 != sk2,
inference(cnfConj,[status(thm)],[4]) ).
thf(8,plain,
sk2 != sk1,
inference(lifteq,[status(thm)],[6]) ).
thf(9,plain,
( ( sk2 @ sk3 )
!= ( sk1 @ sk3 ) ),
inference(func_ext,[status(esa)],[8]) ).
thf(11,plain,
( ( sk2 @ sk3 )
| ( sk1 @ sk3 ) ),
inference(bool_ext,[status(thm)],[9]) ).
thf(5,plain,
( ( ^ [A: a] :
( ( sk1 @ A )
& ~ ( sk2 @ A ) ) )
= ( ^ [A: a] :
( ( sk2 @ A )
& ~ ( sk1 @ A ) ) ) ),
inference(cnfConj,[status(thm)],[4]) ).
thf(7,plain,
( ( ^ [A: a] :
( ( sk1 @ A )
& ~ ( sk2 @ A ) ) )
= ( ^ [A: a] :
( ( sk2 @ A )
& ~ ( sk1 @ A ) ) ) ),
inference(lifteq,[status(thm)],[5]) ).
thf(12,plain,
! [A: a] :
( ( ( sk1 @ A )
& ~ ( sk2 @ A ) )
= ( ( sk2 @ A )
& ~ ( sk1 @ A ) ) ),
inference(func_ext,[status(esa)],[7]) ).
thf(16,plain,
! [A: a] :
( ( ( sk1 @ A )
& ~ ( sk2 @ A ) )
| ~ ( ( sk2 @ A )
& ~ ( sk1 @ A ) ) ),
inference(bool_ext,[status(thm)],[12]) ).
thf(17,plain,
! [A: a] :
( ( ( sk1 @ A )
| ~ ( sk2 @ A )
| ( sk1 @ A ) )
& ( ~ ( sk2 @ A )
| ~ ( sk2 @ A )
| ( sk1 @ A ) ) ),
inference(cnf,[status(esa)],[16]) ).
thf(18,plain,
! [A: a] :
( ( sk1 @ A )
| ~ ( sk2 @ A )
| ( sk1 @ A ) ),
inference(cnfConj,[status(thm)],[17]) ).
thf(20,plain,
! [A: a] :
( ( sk1 @ A )
| ~ ( sk2 @ A ) ),
inference(simp,[status(thm)],[18]) ).
thf(30,plain,
! [A: a] :
( ( sk1 @ sk3 )
| ( sk1 @ A )
| ~ $true
| ( ( sk2 @ sk3 )
!= ( sk2 @ A ) ) ),
inference(paramod_ordered,[status(thm)],[11,20]) ).
thf(31,plain,
! [A: a] :
( ( sk1 @ sk3 )
| ( sk1 @ A )
| ( ( sk2 @ sk3 )
!= ( sk2 @ A ) ) ),
inference(simp,[status(thm)],[30]) ).
thf(32,plain,
( ( sk1 @ sk3 )
| ( sk1 @ sk3 ) ),
inference(pattern_uni,[status(thm)],[31:[bind(A,$thf( sk3 ))]]) ).
thf(38,plain,
sk1 @ sk3,
inference(simp,[status(thm)],[32]) ).
thf(44,plain,
! [A: a] :
( ( ( $true
& ~ ( sk2 @ A ) )
= ( ( sk2 @ A )
& ~ ( sk1 @ A ) ) )
| ( ( sk1 @ sk3 )
!= ( sk1 @ A ) ) ),
inference(paramod_ordered,[status(thm)],[38,12]) ).
thf(45,plain,
! [A: a] :
( ( ( ~ ( sk2 @ A ) )
= ( ( sk2 @ A )
& ~ ( sk1 @ A ) ) )
| ( ( sk1 @ sk3 )
!= ( sk1 @ A ) ) ),
inference(simp,[status(thm)],[44]) ).
thf(46,plain,
( ( ( sk2 @ sk3 )
& ~ ( sk1 @ sk3 ) )
= ( ~ ( sk2 @ sk3 ) ) ),
inference(pattern_uni,[status(thm)],[45:[bind(A,$thf( sk3 ))]]) ).
thf(10,plain,
( ~ ( sk2 @ sk3 )
| ~ ( sk1 @ sk3 ) ),
inference(bool_ext,[status(thm)],[9]) ).
thf(41,plain,
( ~ ( sk2 @ sk3 )
| ~ $true ),
inference(rewrite,[status(thm)],[10,38]) ).
thf(42,plain,
~ ( sk2 @ sk3 ),
inference(simp,[status(thm)],[41]) ).
thf(48,plain,
( ( $false
& ~ $true )
= ( ~ $false ) ),
inference(rewrite,[status(thm)],[46,38,42]) ).
thf(49,plain,
$false,
inference(simp,[status(thm)],[48]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET616^5 : TPTP v9.3.1. Released v4.0.0.
% 0.00/0.08 % 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
% 0.11/0.21 % Computer : n016.cluster.edu
% 0.11/0.21 % Model : x86_64 x86_64
% 0.11/0.21 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.21 % Memory : 8046.5625MB
% 0.11/0.21 % OS : Linux 6.8.0-71-generic
% 0.11/0.21 % CPULimit : 300
% 0.11/0.21 % WCLimit : 300
% 0.11/0.21 % DateTime : Tue Sep 29 13:44:19 UTC 2026
% 0.11/0.21 % CPUTime :
% 0.11/0.21 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
% 0.67/0.53 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.10/0.70 % [INFO] Parsing done (168ms).
% 1.10/0.72 % [INFO] Running in sequential loop mode.
% 1.57/1.12 % [INFO] eprover registered as external prover.
% 1.57/1.12 % [INFO] Scanning for conjecture ...
% 1.89/1.21 % [INFO] Found a conjecture (or negated_conjecture) and 0 axioms. Running axiom selection ...
% 1.89/1.24 % [INFO] Axiom selection finished. Selected 0 axioms (removed 0 axioms).
% 1.89/1.24 % [INFO] Problem is higher-order (TPTP THF).
% 1.89/1.25 % [INFO] Type checking passed.
% 1.89/1.25 % [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 ...
% 3.41/2.03 % [INFO] Killing All external provers ...
% 4.00/2.03 % Time passed: 1722ms (effective reasoning time: 1307ms)
% 4.00/2.03 % 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)>
% 4.00/2.03 % Axioms used in derivation (0):
% 4.00/2.03 % No. of inferences in proof: 27
% 4.00/2.03 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 1722 ms resp. 1307 ms w/o parsing
% 4.00/2.09 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 4.00/2.09 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------