%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : ALG286^5 : 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 : n015.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 07:45:08 AM UTC 2026
% Result : Theorem 4.26s 2.37s
% Output : Refutation 4.26s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 1
% Syntax : Number of formulae : 4 ( 1 unt; 0 typ; 0 def)
% Number of atoms : 28 ( 27 equ; 0 cnn)
% Maximal formula atoms : 7 ( 7 avg)
% Number of connectives : 68 ( 8 ~; 0 |; 12 &; 42 @)
% ( 0 <=>; 6 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 6 avg)
% Number of types : 1 ( 1 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 9 ( 7 usr; 5 con; 0-2 aty)
% Number of variables : 15 ( 0 ^; 15 !; 0 ?; 15 :)
% Comments :
%------------------------------------------------------------------------------
thf(a_type,type,
a: $tType ).
thf(cZ_decl,type,
cZ: a ).
thf(u_decl,type,
u: a ).
thf(y_decl,type,
y: a ).
thf(x_decl,type,
x: a ).
thf(cP_decl,type,
cP: a > a > a ).
thf(cR_decl,type,
cR: a > a ).
thf(cL_decl,type,
cL: a > a ).
thf(1,conjecture,
( ( ( ( cL @ cZ )
= cZ )
& ( ( cR @ cZ )
= cZ )
& ! [A: a,B: a] :
( ( cL @ ( cP @ A @ B ) )
= A )
& ! [A: a,B: a] :
( ( cR @ ( cP @ A @ B ) )
= B )
& ! [A: a] :
( ( A != cZ )
= ( A
= ( cP @ ( cL @ A ) @ ( cR @ A ) ) ) ) )
=> ( ( u
= ( cP @ x @ y ) )
=> ( u != cZ ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cPU_PAIR_NOT_ZERO_pme) ).
thf(2,negated_conjecture,
~ ( ( ( ( cL @ cZ )
= cZ )
& ( ( cR @ cZ )
= cZ )
& ! [A: a,B: a] :
( ( cL @ ( cP @ A @ B ) )
= A )
& ! [A: a,B: a] :
( ( cR @ ( cP @ A @ B ) )
= B )
& ! [A: a] :
( ( A != cZ )
= ( A
= ( cP @ ( cL @ A ) @ ( cR @ A ) ) ) ) )
=> ( ( u
= ( cP @ x @ y ) )
=> ( u != cZ ) ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(3,plain,
~ ( ( ( ( cL @ cZ )
= cZ )
& ( ( cR @ cZ )
= cZ )
& ! [A: a,B: a] :
( ( cL @ ( cP @ A @ B ) )
= A )
& ! [A: a,B: a] :
( ( cR @ ( cP @ A @ B ) )
= B )
& ! [A: a] :
( ( A != cZ )
= ( A
= ( cP @ ( cL @ A ) @ ( cR @ A ) ) ) ) )
=> ( ( u
= ( cP @ x @ y ) )
=> ( u != cZ ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(28,plain,
$false,
inference(e,[status(thm)],[3]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : ALG286^5 : TPTP v9.3.1. Released v4.0.0.
% 0.00/0.09 % 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
% 0.12/0.27 % Computer : n015.cluster.edu
% 0.12/0.27 % Model : x86_64 x86_64
% 0.12/0.27 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.27 % Memory : 8046.5625MB
% 0.12/0.27 % OS : Linux 6.8.0-71-generic
% 0.13/0.27 % CPULimit : 300
% 0.13/0.27 % WCLimit : 300
% 0.13/0.27 % DateTime : Tue Sep 29 17:41:03 UTC 2026
% 0.13/0.28 % CPUTime :
% 0.13/0.28 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
% 1.07/0.88 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.53/1.13 % [INFO] Parsing done (251ms).
% 1.72/1.15 % [INFO] Running in sequential loop mode.
% 2.41/1.63 % [INFO] eprover registered as external prover.
% 2.41/1.64 % [INFO] Scanning for conjecture ...
% 2.65/1.75 % [INFO] Found a conjecture (or negated_conjecture) and 0 axioms. Running axiom selection ...
% 2.65/1.80 % [INFO] Axiom selection finished. Selected 0 axioms (removed 0 axioms).
% 2.65/1.80 % [INFO] Problem is higher-order (TPTP THF).
% 2.83/1.80 % [INFO] Type checking passed.
% 2.83/1.81 % [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 ...
% 4.26/2.37 % External prover 'e' found a proof!
% 4.26/2.37 % [INFO] Killing All external provers ...
% 4.26/2.37 % Time passed: 1962ms (effective reasoning time: 1209ms)
% 4.26/2.37 % 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)>
% 4.26/2.37 % Axioms used in derivation (0):
% 4.26/2.37 % No. of inferences in proof: 4
% 4.26/2.37 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 1962 ms resp. 1209 ms w/o parsing
% 4.26/2.40 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 4.26/2.40 % [INFO] Killing All external provers ...
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