%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : HEN009-4 : TPTP v9.3.1. Bugfixed v1.2.1.
% 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 : n003.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 : Sun Sep 27 07:31:40 AM UTC 2026
% Result : Unsatisfiable 4.61s 2.60s
% Output : Refutation 4.61s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 16
% Syntax : Number of formulae : 33 ( 19 unt; 0 typ; 0 def)
% Number of atoms : 51 ( 16 equ; 0 cnn)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 194 ( 20 ~; 18 |; 0 &; 156 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 10 ( 6 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 7 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 56 ( 0 ^; 56 !; 0 ?; 56 :)
% Comments :
%------------------------------------------------------------------------------
thf(divide_decl,type,
divide: $i > $i > $i ).
thf(identity_decl,type,
identity: $i ).
thf(a_decl,type,
a: $i ).
thf(less_equal_decl,type,
less_equal: $i > $i > $o ).
thf(zero_decl,type,
zero: $i ).
thf(14,axiom,
! [B: $i,A: $i] :
( ( ( B @ ( A @ divide ) )
= zero )
| ~ ( B @ ( A @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',quotient_less_equal1) ).
thf(42,plain,
! [B: $i,A: $i] :
( ( ( B @ ( A @ divide ) )
= zero )
| ~ ( B @ ( A @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[14]) ).
thf(2,axiom,
! [A: $i] : ( A @ ( zero @ less_equal ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',zero_is_smallest) ).
thf(20,plain,
! [A: $i] : ( A @ ( zero @ less_equal ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(12,axiom,
! [A: $i] : ( identity @ ( A @ less_equal ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',identity_is_largest) ).
thf(39,plain,
! [A: $i] : ( identity @ ( A @ less_equal ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[12]) ).
thf(7,axiom,
( ( zero @ ( a @ divide ) )
= a ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',x_divide_zero_is_x) ).
thf(31,plain,
( ( zero @ ( a @ divide ) )
= a ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[7]) ).
thf(10,axiom,
! [A: $i] :
( ( A @ ( A @ divide ) )
= zero ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',x_divide_x_is_zero) ).
thf(36,plain,
! [A: $i] :
( ( A @ ( A @ divide ) )
= zero ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[10]) ).
thf(16,axiom,
! [C: $i,B: $i,A: $i] :
( ( C @ ( B @ divide ) @ ( C @ ( A @ divide ) @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',property_of_divide3) ).
thf(47,plain,
! [C: $i,B: $i,A: $i] :
( ( C @ ( B @ divide ) @ ( C @ ( A @ divide ) @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[16]) ).
thf(3,axiom,
! [C: $i,B: $i,A: $i] :
( ( C @ ( A @ less_equal ) )
| ~ ( C @ ( B @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',transitivity_of_less_equal) ).
thf(21,plain,
! [C: $i,B: $i,A: $i] :
( ( C @ ( A @ less_equal ) )
| ~ ( C @ ( B @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(8,axiom,
! [B: $i,A: $i] : ( A @ ( B @ ( A @ divide ) @ less_equal ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',quotient_smaller_than_numerator) ).
thf(33,plain,
! [B: $i,A: $i] : ( A @ ( B @ ( A @ divide ) @ less_equal ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[8]) ).
thf(6,axiom,
! [B: $i,A: $i] :
( ( B @ ( A @ less_equal ) )
| ( ( B @ ( A @ divide ) )
!= zero ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',quotient_less_equal2) ).
thf(28,plain,
! [B: $i,A: $i] :
( ( B @ ( A @ less_equal ) )
| ( ( B @ ( A @ divide ) )
!= zero ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[6]) ).
thf(11,axiom,
! [C: $i,B: $i,A: $i] : ( B @ ( C @ ( A @ divide ) @ divide ) @ ( B @ ( C @ divide ) @ ( B @ ( A @ divide ) @ divide ) @ less_equal ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',quotient_property) ).
thf(38,plain,
! [C: $i,B: $i,A: $i] : ( B @ ( C @ ( A @ divide ) @ divide ) @ ( B @ ( C @ divide ) @ ( B @ ( A @ divide ) @ divide ) @ less_equal ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[11]) ).
thf(9,axiom,
! [C: $i,B: $i,A: $i] :
( ( A @ ( C @ divide ) @ ( B @ ( C @ divide ) @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',property_of_divide2) ).
thf(34,plain,
! [C: $i,B: $i,A: $i] :
( ( A @ ( C @ divide ) @ ( B @ ( C @ divide ) @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[9]) ).
thf(15,axiom,
! [A: $i] :
( ( A @ ( zero @ divide ) )
= zero ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',zero_divide_anything_is_zero) ).
thf(45,plain,
! [A: $i] :
( ( A @ ( zero @ divide ) )
= zero ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[15]) ).
thf(1,negated_conjecture,
( ( a @ ( identity @ divide ) )
!= ( a @ ( identity @ divide ) @ ( identity @ divide ) @ ( identity @ divide ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_this) ).
thf(17,plain,
( ( a @ ( identity @ divide ) )
!= ( a @ ( identity @ divide ) @ ( identity @ divide ) @ ( identity @ divide ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(13,axiom,
! [A: $i] :
( ( identity @ ( A @ divide ) )
= zero ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',everything_divide_id_is_zero) ).
thf(40,plain,
! [A: $i] :
( ( identity @ ( A @ divide ) )
= zero ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[13]) ).
thf(5,axiom,
! [C: $i,B: $i,A: $i] :
( ( B @ ( C @ ( A @ divide ) @ less_equal ) )
| ~ ( C @ ( B @ ( A @ divide ) @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',property_of_divide1) ).
thf(26,plain,
! [C: $i,B: $i,A: $i] :
( ( B @ ( C @ ( A @ divide ) @ less_equal ) )
| ~ ( C @ ( B @ ( A @ divide ) @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).
thf(4,axiom,
! [B: $i,A: $i] :
( ( A = B )
| ~ ( A @ ( B @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',less_equal_and_equal) ).
thf(23,plain,
! [B: $i,A: $i] :
( ( A = B )
| ~ ( A @ ( B @ less_equal ) )
| ~ ( B @ ( A @ less_equal ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(125,plain,
$false,
inference(e,[status(thm)],[42,20,39,31,36,47,21,33,28,38,34,45,17,40,26,23]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : HEN009-4 : TPTP v9.3.1. Bugfixed v1.2.1.
% 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
% 0.13/0.40 % Computer : n003.cluster.edu
% 0.13/0.40 % Model : x86_64 x86_64
% 0.13/0.40 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.40 % Memory : 8046.5625MB
% 0.13/0.40 % OS : Linux 6.8.0-71-generic
% 0.13/0.40 % CPULimit : 300
% 0.13/0.40 % WCLimit : 300
% 0.13/0.40 % DateTime : Fri Sep 25 15:59:08 UTC 2026
% 0.07/0.40 % CPUTime :
% 0.07/0.40 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
% 0.89/0.98 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.32/1.18 % [INFO] Parsing done (196ms).
% 1.32/1.19 % [INFO] Running in sequential loop mode.
% 2.08/1.60 % [INFO] eprover registered as external prover.
% 2.08/1.61 % [INFO] Scanning for conjecture ...
% 2.27/1.70 % [INFO] Found a conjecture (or negated_conjecture) and 15 axioms. Running axiom selection ...
% 2.27/1.76 % [INFO] Axiom selection finished. Selected 15 axioms (removed 0 axioms).
% 2.27/1.78 % [INFO] Problem is propositional (TPTP CNF).
% 2.27/1.79 % [INFO] Type checking passed.
% 2.27/1.79 % [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 ...
% 4.10/2.59 % External prover 'e' found a proof!
% 4.10/2.59 % [INFO] Killing All external provers ...
% 4.10/2.59 % Time passed: 2059ms (effective reasoning time: 1393ms)
% 4.10/2.60 % Axioms used in derivation (15): identity_is_largest, x_divide_x_is_zero, property_of_divide3, property_of_divide2, zero_divide_anything_is_zero, property_of_divide1, everything_divide_id_is_zero, quotient_less_equal2, less_equal_and_equal, zero_is_smallest, x_divide_zero_is_x, quotient_less_equal1, transitivity_of_less_equal, quotient_smaller_than_numerator, quotient_property
% 4.10/2.60 % No. of inferences in proof: 33
% 4.61/2.60 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : 2059 ms resp. 1393 ms w/o parsing
% 4.61/2.64 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 4.61/2.64 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------