%------------------------------------------------------------------------------
% File : Leo-III---1.8.0
% Problem : PLA002-2 : TPTP v9.3.1. Released v1.0.0.
% 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 : n017.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 08:19:52 AM UTC 2026
% Result : Unsatisfiable 4.76s 2.63s
% Output : Refutation 4.76s
% Verified :
% SZS Type : Refutation
% Derivation depth : 2
% Number of leaves : 23
% Syntax : Number of formulae : 47 ( 5 unt; 0 typ; 0 def)
% Number of atoms : 129 ( 0 equ; 0 cnn)
% Maximal formula atoms : 4 ( 2 avg)
% Number of connectives : 428 ( 82 ~; 82 |; 0 &; 264 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 7 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 17 ( 16 usr; 8 con; 0-2 aty)
% Number of variables : 54 ( 0 ^; 54 !; 0 ?; 54 :)
% Comments :
%------------------------------------------------------------------------------
thf(at_decl,type,
at: $i > $i > $o ).
thf(a_decl,type,
a: $i ).
thf(situation_decl,type,
situation: $i > $o ).
thf(warm_decl,type,
warm: $i > $o ).
thf(b_decl,type,
b: $i ).
thf(d_decl,type,
d: $i ).
thf(climb_decl,type,
climb: $i > $i > $i ).
thf(go_decl,type,
go: $i > $i > $i ).
thf(e_decl,type,
e: $i ).
thf(c_decl,type,
c: $i ).
thf(s0_decl,type,
s0: $i ).
thf(cold_decl,type,
cold: $i > $o ).
thf(skate_decl,type,
skate: $i > $i > $i ).
thf(f_decl,type,
f: $i ).
thf(drive_decl,type,
drive: $i > $i > $i ).
thf(walk_decl,type,
walk: $i > $i > $i ).
thf(18,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( e @ go ) @ ( e @ at ) )
| ~ ( A @ ( c @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_c_to_e) ).
thf(56,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( e @ go ) @ ( e @ at ) )
| ~ ( A @ ( c @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[18]) ).
thf(16,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( a @ walk ) @ ( a @ at ) )
| ~ ( A @ ( b @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',walk_b_to_a) ).
thf(52,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( a @ walk ) @ ( a @ at ) )
| ~ ( A @ ( b @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[16]) ).
thf(13,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ climb ) @ ( b @ at ) )
| ~ ( A @ ( d @ at ) )
| ~ ( A @ warm ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',climb_mountain_d_to_b) ).
thf(46,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ climb ) @ ( b @ at ) )
| ~ ( A @ ( d @ at ) )
| ~ ( A @ warm ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[13]) ).
thf(20,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ go ) @ ( d @ at ) )
| ~ ( A @ ( c @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_c_to_d) ).
thf(60,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ go ) @ ( d @ at ) )
| ~ ( A @ ( c @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[20]) ).
thf(12,axiom,
! [B: $i,A: $i] :
( ~ ( B @ situation )
| ~ ( A @ situation )
| ( B @ cold )
| ( A @ warm ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',warm_or_cold) ).
thf(44,plain,
! [B: $i,A: $i] :
( ~ ( B @ situation )
| ~ ( A @ situation )
| ( B @ cold )
| ( A @ warm ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[12]) ).
thf(17,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ go ) @ ( d @ at ) )
| ~ ( A @ ( f @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_f_to_d) ).
thf(54,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ go ) @ ( d @ at ) )
| ~ ( A @ ( f @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[17]) ).
thf(23,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ go ) @ ( c @ at ) )
| ~ ( A @ ( d @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_d_to_c) ).
thf(66,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ go ) @ ( c @ at ) )
| ~ ( A @ ( d @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[23]) ).
thf(7,axiom,
! [B: $i,A: $i] :
( ( A @ ( B @ climb ) @ situation )
| ~ ( A @ situation ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',climb_situation) ).
thf(35,plain,
! [B: $i,A: $i] :
( ( A @ ( B @ climb ) @ situation )
| ~ ( A @ situation ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[7]) ).
thf(14,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ walk ) @ ( b @ at ) )
| ~ ( A @ ( a @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',walk_a_to_b) ).
thf(48,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ walk ) @ ( b @ at ) )
| ~ ( A @ ( a @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[14]) ).
thf(15,axiom,
! [B: $i,A: $i] :
( ( A @ ( B @ walk ) @ situation )
| ~ ( A @ situation ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',walk_situation) ).
thf(50,plain,
! [B: $i,A: $i] :
( ( A @ ( B @ walk ) @ situation )
| ~ ( A @ situation ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[15]) ).
thf(19,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ skate ) @ ( c @ at ) )
| ~ ( A @ ( b @ at ) )
| ~ ( A @ cold ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cross_river_b_to_c) ).
thf(58,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ skate ) @ ( c @ at ) )
| ~ ( A @ ( b @ at ) )
| ~ ( A @ cold ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[19]) ).
thf(4,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ go ) @ ( c @ at ) )
| ~ ( A @ ( e @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_e_to_c) ).
thf(30,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( c @ go ) @ ( c @ at ) )
| ~ ( A @ ( e @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[4]) ).
thf(21,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( a @ drive ) @ ( a @ at ) )
| ~ ( A @ ( b @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',drive_b_to_a) ).
thf(62,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( a @ drive ) @ ( a @ at ) )
| ~ ( A @ ( b @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[21]) ).
thf(11,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ drive ) @ ( b @ at ) )
| ~ ( A @ ( a @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',drive_a_to_b) ).
thf(42,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ drive ) @ ( b @ at ) )
| ~ ( A @ ( a @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[11]) ).
thf(1,negated_conjecture,
! [A: $i] :
( ~ ( A @ situation )
| ~ ( A @ ( a @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_you_can_get_to_a_in_a_situation) ).
thf(24,plain,
! [A: $i] :
( ~ ( A @ situation )
| ~ ( A @ ( a @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[1]) ).
thf(8,axiom,
s0 @ ( f @ at ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',initial) ).
thf(37,plain,
s0 @ ( f @ at ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[8]) ).
thf(6,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ skate ) @ ( b @ at ) )
| ~ ( A @ ( c @ at ) )
| ~ ( A @ cold ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',cross_river_c_to_b) ).
thf(33,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( b @ skate ) @ ( b @ at ) )
| ~ ( A @ ( c @ at ) )
| ~ ( A @ cold ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[6]) ).
thf(3,axiom,
! [B: $i,A: $i] :
( ( A @ ( B @ go ) @ situation )
| ~ ( A @ situation ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_situation) ).
thf(28,plain,
! [B: $i,A: $i] :
( ( A @ ( B @ go ) @ situation )
| ~ ( A @ situation ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[3]) ).
thf(9,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( f @ go ) @ ( f @ at ) )
| ~ ( A @ ( d @ at ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',go_d_to_f) ).
thf(38,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( f @ go ) @ ( f @ at ) )
| ~ ( A @ ( d @ at ) ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[9]) ).
thf(5,axiom,
s0 @ situation,
file('/export/starexec/sandbox/benchmark/theBenchmark.p',initial_situation) ).
thf(32,plain,
s0 @ situation,
inference(defexp_and_simp_and_etaexpand,[status(thm)],[5]) ).
thf(22,axiom,
! [B: $i,A: $i] :
( ( A @ ( B @ drive ) @ situation )
| ~ ( A @ situation ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',drive_situation) ).
thf(64,plain,
! [B: $i,A: $i] :
( ( A @ ( B @ drive ) @ situation )
| ~ ( A @ situation ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[22]) ).
thf(10,axiom,
! [B: $i,A: $i] :
( ( A @ ( B @ skate ) @ situation )
| ~ ( A @ situation ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',skate_situation) ).
thf(40,plain,
! [B: $i,A: $i] :
( ( A @ ( B @ skate ) @ situation )
| ~ ( A @ situation ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[10]) ).
thf(2,axiom,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ climb ) @ ( d @ at ) )
| ~ ( A @ ( b @ at ) )
| ~ ( A @ warm ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',climb_mountain_b_to_d) ).
thf(26,plain,
! [A: $i] :
( ~ ( A @ situation )
| ( A @ ( d @ climb ) @ ( d @ at ) )
| ~ ( A @ ( b @ at ) )
| ~ ( A @ warm ) ),
inference(defexp_and_simp_and_etaexpand,[status(thm)],[2]) ).
thf(106,plain,
$false,
inference(e,[status(thm)],[56,52,46,60,44,54,66,35,48,50,58,30,62,42,24,37,33,28,38,32,64,40,26]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : PLA002-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.07 % 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 : n017.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 : Sat Sep 26 04:37:34 UTC 2026
% 0.13/0.40 % CPUTime :
% 0.13/0.40 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
% 0.87/0.96 % [INFO] Parsing problem /export/starexec/sandbox/benchmark/theBenchmark.p ...
% 1.28/1.16 % [INFO] Parsing done (193ms).
% 1.28/1.17 % [INFO] Running in sequential loop mode.
% 1.93/1.58 % [INFO] eprover registered as external prover.
% 1.93/1.59 % [INFO] Scanning for conjecture ...
% 2.12/1.69 % [INFO] Found a conjecture (or negated_conjecture) and 22 axioms. Running axiom selection ...
% 2.31/1.77 % [INFO] Axiom selection finished. Selected 22 axioms (removed 0 axioms).
% 2.50/1.81 % [INFO] Problem is propositional (TPTP CNF).
% 2.50/1.81 % [INFO] Type checking passed.
% 2.50/1.82 % [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 ...
% 4.76/2.62 % External prover 'e' found a proof!
% 4.76/2.62 % [INFO] Killing All external provers ...
% 4.76/2.62 % Time passed: 2105ms (effective reasoning time: 1444ms)
% 4.76/2.63 % Axioms used in derivation (22): initial, go_d_to_c, skate_situation, go_f_to_d, climb_situation, go_c_to_e, walk_a_to_b, cross_river_b_to_c, go_e_to_c, go_c_to_d, cross_river_c_to_b, drive_situation, walk_situation, drive_b_to_a, walk_b_to_a, drive_a_to_b, climb_mountain_d_to_b, go_situation, climb_mountain_b_to_d, go_d_to_f, initial_situation, warm_or_cold
% 4.76/2.63 % No. of inferences in proof: 47
% 4.76/2.63 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : 2105 ms resp. 1444 ms w/o parsing
% 4.76/2.68 % SZS output start Refutation for /export/starexec/sandbox/benchmark/theBenchmark.p
% See solution above
% 4.76/2.68 % [INFO] Killing All external provers ...
%------------------------------------------------------------------------------