%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : SEV282^5 : TPTP v9.3.1. Bugfixed v6.2.0.
% 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 : n007.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 08:37:06 AM UTC 2026
% Result : Theorem 3.41s 1.72s
% Output : Refutation 3.41s
% Verified :
% SZS Type : Refutation
% Derivation depth : 6
% Number of leaves : 5
% Syntax : Number of formulae : 12 ( 9 unt; 0 typ; 4 def)
% Number of atoms : 26 ( 8 equ; 0 cnn)
% Maximal formula atoms : 5 ( 2 avg)
% Number of connectives : 82 ( 20 ~; 1 |; 13 &; 42 @)
% ( 0 <=>; 6 =>; 0 <=; 0 <~>)
% Maximal formula depth : 15 ( 4 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 34 ( 34 >; 0 *; 0 +; 0 <<)
% Number of symbols : 7 ( 4 usr; 2 con; 0-2 aty)
% Number of variables : 39 ( 19 ^; 6 !; 13 ?; 39 :)
% ( 0 !>; 0 ?*; 0 @-; 1 @+)
% Comments :
%------------------------------------------------------------------------------
thf(cNAT_decl,type,
cNAT: ( ( $i > $o ) > $o ) > $o ).
thf(cSUCC_decl,type,
cSUCC: ( ( $i > $o ) > $o ) > ( $i > $o ) > $o ).
thf(cZERO_decl,type,
cZERO: ( $i > $o ) > $o ).
thf(sk1_decl,type,
sk1: ( ( $i > $o ) > $o ) > $o ).
thf(cNAT_def,definition,
( cNAT
= ( ^ [A: ( $i > $o ) > $o] :
! [B: ( ( $i > $o ) > $o ) > $o] :
( ( ( B @ cZERO )
& ! [C: ( $i > $o ) > $o] :
( ( B @ C )
=> ( B @ ( cSUCC @ C ) ) ) )
=> ( B @ A ) ) ) ) ).
thf(cSUCC_def,definition,
( cSUCC
= ( ^ [A: ( $i > $o ) > $o,B: $i > $o] :
? [C: $i] :
( ( B @ C )
& ( A
@ ^ [D: $i] :
( ( D != C )
& ( B @ D ) ) ) ) ) ) ).
thf(cZERO_def,definition,
( cZERO
= ( ^ [A: $i > $o] :
~ ? [B: $i] : ( A @ B ) ) ) ).
thf(sk1_def,definition,
( sk1
= ( @+[A: ( ( $i > $o ) > $o ) > $o] :
~ ( ( ( A
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) )
& ! [B: ( $i > $o ) > $o] :
( ( A @ B )
=> ( A
@ ^ [C: $i > $o] :
? [D: $i] :
( ( C @ D )
& ( B
@ ^ [E: $i] :
( ( E != D )
& ( C @ E ) ) ) ) ) ) )
=> ( A
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) ) ) ) ) ).
thf(1,conjecture,
cNAT @ cZERO,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cTTTP6100) ).
thf(2,negated_conjecture,
~ ( cNAT @ cZERO ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(3,plain,
~ ! [A: ( ( $i > $o ) > $o ) > $o] :
( ( ( A
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) )
& ! [B: ( $i > $o ) > $o] :
( ( A @ B )
=> ( A
@ ^ [C: $i > $o] :
? [D: $i] :
( ( C @ D )
& ( B
@ ^ [E: $i] :
( ( E != D )
& ( C @ E ) ) ) ) ) ) )
=> ( A
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(4,plain,
! [A: ( $i > $o ) > $o] :
( ( sk1
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) )
& ( ~ ( sk1 @ A )
| ( sk1
@ ^ [B: $i > $o] :
? [C: $i] :
( ( B @ C )
& ( A
@ ^ [D: $i] :
( ( D != C )
& ( B @ D ) ) ) ) ) )
& ~ ( sk1
@ ^ [B: $i > $o] :
~ ? [C: $i] : ( B @ C ) ) ),
inference(cnf,[status(esa)],[3]) ).
thf(7,plain,
~ ( sk1
@ ^ [A: $i > $o] :
~ ? [B: $i] : ( A @ B ) ),
inference(cnfConj,[status(thm)],[4]) ).
thf(5,plain,
( sk1
@ ^ [A: $i > $o] :
~ ? [B: $i] : ( A @ B ) ),
inference(cnfConj,[status(thm)],[4]) ).
thf(8,plain,
~ $true,
inference(rewrite,[status(thm)],[7,5]) ).
thf(9,plain,
$false,
inference(simp,[status(thm)],[8]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SEV282^5 : TPTP v9.3.1. Bugfixed v6.2.0.
% 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 : n007.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 15:29:11 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
% 0.65/0.52 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 0.87/0.62 % [INFO] Parsing done (99ms).
% 1.02/0.63 % [INFO] Running in sequential loop mode.
% 1.31/0.86 % [INFO] eprover registered as external prover.
% 1.31/0.87 % [INFO] Scanning for conjecture ...
% 1.51/0.98 % [INFO] Found a conjecture (or negated_conjecture) and 0 axioms. Running axiom selection ...
% 1.51/1.00 % [INFO] Axiom selection finished. Selected 0 axioms (removed 0 axioms).
% 1.51/1.00 % [INFO] Problem is higher-order (TPTP THF).
% 1.51/1.01 % [INFO] Type checking passed.
% 1.51/1.01 % [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 ...
% 3.41/1.71 % [INFO] Killing All external provers ...
% 3.41/1.72 % Time passed: 1408ms (effective reasoning time: 1078ms)
% 3.41/1.72 % 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)>
% 3.41/1.72 % Axioms used in derivation (0):
% 3.41/1.72 % No. of inferences in proof: 8
% 3.41/1.72 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 1408 ms resp. 1078 ms w/o parsing
% 3.41/1.78 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 3.41/1.78 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------