%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : LCL097-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n009.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 Oct 7 10:27:58 AM UTC 2026
% Result : Unsatisfiable 9.22s 1.75s
% Output : CNFRefutation 9.22s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 5
% Syntax : Number of formulae : 36 ( 31 unt; 0 typ; 0 def)
% Number of atoms : 126 ( 36 equ; 0 cnn)
% Maximal formula atoms : 3 ( 3 avg)
% Number of connectives : 415 ( 19 ~; 18 |; 0 &; 378 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 19 ( 4 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 10 ( 7 usr; 7 con; 0-2 aty)
% Number of variables : 86 ( 0 ^; 86 !; 0 ?; 86 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_a,type,
a: $i ).
thf(tp_b,type,
b: $i ).
thf(tp_c,type,
c: $i ).
thf(tp_e,type,
e: $i ).
thf(tp_equivalent,type,
equivalent: $i > $i > $i ).
thf(tp_falsehood,type,
falsehood: $i ).
thf(tp_is_a_theorem,type,
is_a_theorem: $i > $o ).
thf(1,axiom,
! [X: $i,Y: $i,Z: $i,U: $i,V: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ U ) @ ( equivalent @ ( equivalent @ Y @ Z ) @ U ) ) @ V ) @ V ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',lg_3) ).
thf(2,axiom,
! [X: $i,Y: $i,Z: $i,U: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ ( equivalent @ Y @ Z ) ) @ U ) @ U ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',lg_2) ).
thf(3,axiom,
! [X: $i,Y: $i] :
( ~ ( is_a_theorem @ ( equivalent @ X @ Y ) )
| ~ ( is_a_theorem @ X )
| ( is_a_theorem @ Y ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',condensed_detachment) ).
thf(4,conjecture,
$false,
file('no conjecture given, we try to refute the axioms',dummy_conjecture) ).
thf(5,negated_conjecture,
$false = $false,
inference(negate_conjecture,[status(cth)],[4]) ).
thf(6,negated_conjecture,
~ ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ a @ b ) @ c ) @ e ) @ ( equivalent @ ( equivalent @ ( equivalent @ a @ falsehood ) @ c ) @ ( equivalent @ ( equivalent @ b @ falsehood ) @ e ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_lg_4) ).
thf(7,plain,
$false = $false,
inference(unfold_def,[status(thm)],[5]) ).
thf(8,plain,
( ( ! [X: $i,Y: $i,Z: $i,U: $i,V: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ U ) @ ( equivalent @ ( equivalent @ Y @ Z ) @ U ) ) @ V ) @ V ) ) )
= $true ),
inference(unfold_def,[status(thm)],[1]) ).
thf(9,plain,
( ( ! [X: $i,Y: $i,Z: $i,U: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ ( equivalent @ Y @ Z ) ) @ U ) @ U ) ) )
= $true ),
inference(unfold_def,[status(thm)],[2]) ).
thf(10,plain,
( ( ! [X: $i,Y: $i] :
( ~ ( is_a_theorem @ ( equivalent @ X @ Y ) )
| ~ ( is_a_theorem @ X )
| ( is_a_theorem @ Y ) ) )
= $true ),
inference(unfold_def,[status(thm)],[3]) ).
thf(11,plain,
( ( ~ ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ a @ b ) @ c ) @ e ) @ ( equivalent @ ( equivalent @ ( equivalent @ a @ falsehood ) @ c ) @ ( equivalent @ ( equivalent @ b @ falsehood ) @ e ) ) ) ) )
= $true ),
inference(unfold_def,[status(thm)],[6]) ).
thf(12,plain,
( ( ~ $false ) = $true ),
inference(polarity_switch,[status(thm)],[7]) ).
thf(13,plain,
( ( ~ ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ a @ b ) @ c ) @ e ) @ ( equivalent @ ( equivalent @ ( equivalent @ a @ falsehood ) @ c ) @ ( equivalent @ ( equivalent @ b @ falsehood ) @ e ) ) ) ) )
= $true ),
inference(copy,[status(thm)],[11]) ).
thf(14,plain,
( ( ! [X: $i,Y: $i] :
( ~ ( is_a_theorem @ ( equivalent @ X @ Y ) )
| ~ ( is_a_theorem @ X )
| ( is_a_theorem @ Y ) ) )
= $true ),
inference(copy,[status(thm)],[10]) ).
thf(15,plain,
( ( ! [X: $i,Y: $i,Z: $i,U: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ ( equivalent @ Y @ Z ) ) @ U ) @ U ) ) )
= $true ),
inference(copy,[status(thm)],[9]) ).
thf(16,plain,
( ( ! [X: $i,Y: $i,Z: $i,U: $i,V: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ X @ Y ) @ ( equivalent @ X @ Z ) ) @ U ) @ ( equivalent @ ( equivalent @ Y @ Z ) @ U ) ) @ V ) @ V ) ) )
= $true ),
inference(copy,[status(thm)],[8]) ).
thf(17,plain,
( ( ~ $false ) = $true ),
inference(copy,[status(thm)],[12]) ).
thf(18,plain,
( ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ a @ b ) @ c ) @ e ) @ ( equivalent @ ( equivalent @ ( equivalent @ a @ falsehood ) @ c ) @ ( equivalent @ ( equivalent @ b @ falsehood ) @ e ) ) ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[13]) ).
thf(19,plain,
! [SV1: $i] :
( ( ! [SY11: $i] :
( ~ ( is_a_theorem @ ( equivalent @ SV1 @ SY11 ) )
| ~ ( is_a_theorem @ SV1 )
| ( is_a_theorem @ SY11 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[14]) ).
thf(20,plain,
! [SV2: $i] :
( ( ! [SY12: $i,SY13: $i,SY14: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV2 @ SY12 ) @ ( equivalent @ SV2 @ SY13 ) ) @ ( equivalent @ SY12 @ SY13 ) ) @ SY14 ) @ SY14 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[15]) ).
thf(21,plain,
! [SV3: $i] :
( ( ! [SY15: $i,SY16: $i,SY17: $i,SY18: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV3 @ SY15 ) @ ( equivalent @ SV3 @ SY16 ) ) @ SY17 ) @ ( equivalent @ ( equivalent @ SY15 @ SY16 ) @ SY17 ) ) @ SY18 ) @ SY18 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[16]) ).
thf(22,plain,
$false = $false,
inference(extcnf_not_pos,[status(thm)],[17]) ).
thf(23,plain,
! [SV4: $i,SV1: $i] :
( ( ~ ( is_a_theorem @ ( equivalent @ SV1 @ SV4 ) )
| ~ ( is_a_theorem @ SV1 )
| ( is_a_theorem @ SV4 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[19]) ).
thf(24,plain,
! [SV5: $i,SV2: $i] :
( ( ! [SY19: $i,SY20: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV2 @ SV5 ) @ ( equivalent @ SV2 @ SY19 ) ) @ ( equivalent @ SV5 @ SY19 ) ) @ SY20 ) @ SY20 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[20]) ).
thf(25,plain,
! [SV6: $i,SV3: $i] :
( ( ! [SY21: $i,SY22: $i,SY23: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV3 @ SV6 ) @ ( equivalent @ SV3 @ SY21 ) ) @ SY22 ) @ ( equivalent @ ( equivalent @ SV6 @ SY21 ) @ SY22 ) ) @ SY23 ) @ SY23 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[21]) ).
thf(26,plain,
! [SV4: $i,SV1: $i] :
( ( ( ~ ( is_a_theorem @ ( equivalent @ SV1 @ SV4 ) ) )
= $true )
| ( ( ~ ( is_a_theorem @ SV1 )
| ( is_a_theorem @ SV4 ) )
= $true ) ),
inference(extcnf_or_pos,[status(thm)],[23]) ).
thf(27,plain,
! [SV7: $i,SV5: $i,SV2: $i] :
( ( ! [SY24: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV2 @ SV5 ) @ ( equivalent @ SV2 @ SV7 ) ) @ ( equivalent @ SV5 @ SV7 ) ) @ SY24 ) @ SY24 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[24]) ).
thf(28,plain,
! [SV8: $i,SV6: $i,SV3: $i] :
( ( ! [SY25: $i,SY26: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV3 @ SV6 ) @ ( equivalent @ SV3 @ SV8 ) ) @ SY25 ) @ ( equivalent @ ( equivalent @ SV6 @ SV8 ) @ SY25 ) ) @ SY26 ) @ SY26 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[25]) ).
thf(29,plain,
! [SV4: $i,SV1: $i] :
( ( ( is_a_theorem @ ( equivalent @ SV1 @ SV4 ) )
= $false )
| ( ( ~ ( is_a_theorem @ SV1 )
| ( is_a_theorem @ SV4 ) )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[26]) ).
thf(30,plain,
! [SV9: $i,SV7: $i,SV5: $i,SV2: $i] :
( ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV2 @ SV5 ) @ ( equivalent @ SV2 @ SV7 ) ) @ ( equivalent @ SV5 @ SV7 ) ) @ SV9 ) @ SV9 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[27]) ).
thf(31,plain,
! [SV10: $i,SV8: $i,SV6: $i,SV3: $i] :
( ( ! [SY27: $i] : ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV3 @ SV6 ) @ ( equivalent @ SV3 @ SV8 ) ) @ SV10 ) @ ( equivalent @ ( equivalent @ SV6 @ SV8 ) @ SV10 ) ) @ SY27 ) @ SY27 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[28]) ).
thf(32,plain,
! [SV4: $i,SV1: $i] :
( ( ( ~ ( is_a_theorem @ SV1 ) )
= $true )
| ( ( is_a_theorem @ SV4 )
= $true )
| ( ( is_a_theorem @ ( equivalent @ SV1 @ SV4 ) )
= $false ) ),
inference(extcnf_or_pos,[status(thm)],[29]) ).
thf(33,plain,
! [SV11: $i,SV10: $i,SV8: $i,SV6: $i,SV3: $i] :
( ( is_a_theorem @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ ( equivalent @ SV3 @ SV6 ) @ ( equivalent @ SV3 @ SV8 ) ) @ SV10 ) @ ( equivalent @ ( equivalent @ SV6 @ SV8 ) @ SV10 ) ) @ SV11 ) @ SV11 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[31]) ).
thf(34,plain,
! [SV4: $i,SV1: $i] :
( ( ( is_a_theorem @ SV1 )
= $false )
| ( ( is_a_theorem @ SV4 )
= $true )
| ( ( is_a_theorem @ ( equivalent @ SV1 @ SV4 ) )
= $false ) ),
inference(extcnf_not_pos,[status(thm)],[32]) ).
thf(35,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[18,34,33,30,22]) ).
thf(36,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[35]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : LCL097-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.10/0.15 % Computer : n009.cluster.edu
% 0.10/0.15 % Model : x86_64 x86_64
% 0.10/0.15 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.15 % Memory : 8046.5625MB
% 0.10/0.15 % OS : Linux 6.8.0-71-generic
% 0.10/0.15 % CPULimit : 300
% 0.10/0.15 % WCLimit : 300
% 0.10/0.15 % DateTime : Tue Oct 6 12:09:25 UTC 2026
% 0.10/0.15 % CPUTime :
% 0.10/0.15 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 9.22/1.75
% 9.22/1.75 No.of.Axioms: 4
% 9.22/1.75
% 9.22/1.75 Length.of.Defs: 0
% 9.22/1.75
% 9.22/1.75 Contains.Choice.Funs: false
% 9.22/1.75 .
% 9.22/1.75
% 9.22/1.75 ********************************
% 9.22/1.75 * All subproblems solved! *
% 9.22/1.75 ********************************
% 9.22/1.75 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:4,ps:3,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:true,expand_extuni:false,foatp:e,atp_timeout:74,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:35,loop_count:0,foatp_calls:1,translation:fof_experiment)
% 9.22/1.75
% 9.22/1.75 %**** Beginning of derivation protocol ****
% 9.22/1.75 % SZS output start CNFRefutation
% See solution above
% 9.22/1.75
% 9.22/1.75 %**** End of derivation protocol ****
% 9.22/1.75 %**** no. of clauses in derivation: 36 ****
% 9.22/1.75 %**** clause counter: 35 ****
% 9.22/1.75
% 9.22/1.75 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:4,ps:3,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:true,expand_extuni:false,foatp:e,atp_timeout:74,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:35,loop_count:0,foatp_calls:1,translation:fof_experiment)
%------------------------------------------------------------------------------