%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : NUM721^1 : TPTP v9.3.1. Released v3.7.0.
% 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 : n019.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 08:18:03 AM UTC 2026
% Result : Theorem 4.73s 2.88s
% Output : Refutation 5.10s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 4
% Syntax : Number of formulae : 10 ( 1 unt; 0 typ; 0 def)
% Number of atoms : 27 ( 0 equ; 0 cnn)
% Maximal formula atoms : 6 ( 2 avg)
% Number of connectives : 65 ( 2 ~; 0 |; 0 &; 59 @)
% ( 0 <=>; 4 =>; 0 <=; 0 <~>)
% Maximal formula depth : 12 ( 6 avg)
% Number of types : 2 ( 1 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 8 ( 7 usr; 5 con; 0-3 aty)
% Number of variables : 8 ( 0 ^; 8 !; 0 ?; 8 :)
% Comments :
%------------------------------------------------------------------------------
thf(nat_type,type,
nat: $tType ).
thf(x_decl,type,
x: nat ).
thf(y_decl,type,
y: nat ).
thf(z_decl,type,
z: nat ).
thf(u_decl,type,
u: nat ).
thf(some_decl,type,
some: ( nat > $o ) > $o ).
thf(diffprop_decl,type,
diffprop: nat > nat > nat > $o ).
thf(ts_decl,type,
ts: nat > nat > nat ).
thf(1,conjecture,
some @ ( diffprop @ ( ts @ y @ u ) @ ( ts @ x @ z ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',satz34a) ).
thf(2,negated_conjecture,
~ ( some @ ( diffprop @ ( ts @ y @ u ) @ ( ts @ x @ z ) ) ),
inference(neg_conjecture,[status(cth)],[1]) ).
thf(6,plain,
~ ( some @ ( diffprop @ ( ts @ y @ u ) @ ( ts @ x @ z ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(3,axiom,
some @ ( diffprop @ y @ x ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',l) ).
thf(7,plain,
some @ ( diffprop @ y @ x ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(4,axiom,
some @ ( diffprop @ u @ z ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',k) ).
thf(8,plain,
some @ ( diffprop @ u @ z ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(5,axiom,
! [A: nat,B: nat,C: nat,D: nat] :
( ( some @ ( diffprop @ A @ B ) )
=> ( ( some @ ( diffprop @ C @ D ) )
=> ( some @ ( diffprop @ ( ts @ A @ C ) @ ( ts @ B @ D ) ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',satz34) ).
thf(9,plain,
! [A: nat,B: nat,C: nat,D: nat] :
( ( some @ ( diffprop @ A @ B ) )
=> ( ( some @ ( diffprop @ C @ D ) )
=> ( some @ ( diffprop @ ( ts @ A @ C ) @ ( ts @ B @ D ) ) ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).
thf(12,plain,
$false,
inference(e,[status(thm)],[6,7,8,9]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : NUM721^1 : TPTP v9.3.1. Released v3.7.0.
% 0.00/0.12 % 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
% 0.27/0.32 % Computer : n019.cluster.edu
% 0.27/0.32 % Model : x86_64 x86_64
% 0.27/0.32 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.27/0.32 % Memory : 8046.5625MB
% 0.27/0.32 % OS : Linux 6.8.0-71-generic
% 0.27/0.32 % CPULimit : 300
% 0.27/0.32 % WCLimit : 300
% 0.27/0.32 % DateTime : Tue Sep 29 12:45:02 UTC 2026
% 0.27/0.32 % CPUTime :
% 0.27/0.32 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
% 1.52/1.16 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.94/1.44 % [INFO] Parsing done (270ms).
% 1.94/1.46 % [INFO] Running in sequential loop mode.
% 2.77/1.93 % [INFO] eprover registered as external prover.
% 2.77/1.95 % [INFO] Scanning for conjecture ...
% 3.09/2.08 % [INFO] Found a conjecture (or negated_conjecture) and 3 axioms. Running axiom selection ...
% 3.09/2.13 % [INFO] Axiom selection finished. Selected 3 axioms (removed 0 axioms).
% 3.26/2.16 % [INFO] Problem is higher-order (TPTP THF).
% 3.26/2.17 % [INFO] Type checking passed.
% 3.26/2.17 % [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 ...
% 4.73/2.88 % External prover 'e' found a proof!
% 4.73/2.88 % [INFO] Killing All external provers ...
% 4.73/2.88 % Time passed: 2345ms (effective reasoning time: 1415ms)
% 4.73/2.88 % 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)>
% 4.73/2.88 % Axioms used in derivation (3): l, k, satz34
% 4.73/2.88 % No. of inferences in proof: 10
% 4.73/2.88 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : 2345 ms resp. 1415 ms w/o parsing
% 5.10/2.94 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 5.10/2.94 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------