%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : SET786+1 : TPTP v9.3.1. Released v2.5.0.
% Transfm : none
% Format : tptp:raw
% Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n001.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 10:41:03 AM UTC 2026
% Result : Theorem 0.11s 0.19s
% Output : CNFRefutation 0.11s
% Verified :
% SZS Type : Refutation
% Derivation depth : 24
% Number of leaves : 1
% Syntax : Number of formulae : 38 ( 16 unt; 0 typ; 0 def)
% Number of atoms : 244 ( 60 equ; 0 cnn)
% Maximal formula atoms : 3 ( 6 avg)
% Number of connectives : 550 ( 210 ~; 76 |; 5 &; 254 @)
% ( 5 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 10 ( 3 avg)
% Number of types : 2 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 6 ( 3 usr; 3 con; 0-2 aty)
% Number of variables : 78 ( 0 ^; 68 !; 10 ?; 78 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_element,type,
element: $i > $i > $o ).
thf(tp_sK1_SX0,type,
sK1_SX0: $i ).
thf(tp_sK2_SY7,type,
sK2_SY7: $i > $i ).
thf(1,conjecture,
~ ? [Y: $i] :
! [X: $i] :
( ( element @ X @ Y )
<=> ~ ? [Z: $i] :
( ( element @ X @ Z )
& ( element @ Z @ X ) ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',thm25) ).
thf(2,negated_conjecture,
( ( ~ ? [Y: $i] :
! [X: $i] :
( ( element @ X @ Y )
<=> ~ ? [Z: $i] :
( ( element @ X @ Z )
& ( element @ Z @ X ) ) ) )
= $false ),
inference(negate_conjecture,[status(cth)],[1]) ).
thf(3,plain,
( ( ~ ? [Y: $i] :
! [X: $i] :
( ( element @ X @ Y )
<=> ~ ? [Z: $i] :
( ( element @ X @ Z )
& ( element @ Z @ X ) ) ) )
= $false ),
inference(unfold_def,[status(thm)],[2]) ).
thf(4,plain,
( ( ? [Y: $i] :
! [X: $i] :
( ( element @ X @ Y )
<=> ~ ? [Z: $i] :
( ( element @ X @ Z )
& ( element @ Z @ X ) ) ) )
= $true ),
inference(polarity_switch,[status(thm)],[3]) ).
thf(5,plain,
( ( ? [Y: $i] :
! [X: $i] :
( ( element @ X @ Y )
<=> ~ ? [Z: $i] :
( ( element @ X @ Z )
& ( element @ Z @ X ) ) ) )
= $true ),
inference(copy,[status(thm)],[4]) ).
thf(6,plain,
( ( ~ ! [SX0: $i] :
~ ! [SX1: $i] :
~ ( ~ ( ~ ( element @ SX1 @ SX0 )
| ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SX1 @ SX2 )
| ~ ( element @ SX2 @ SX1 ) ) )
| ~ ( ~ ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SX1 @ SX2 )
| ~ ( element @ SX2 @ SX1 ) )
| ( element @ SX1 @ SX0 ) ) ) )
= $true ),
inference(unfold_def,[status(thm)],[5]) ).
thf(7,plain,
( ( ! [SX0: $i] :
~ ! [SX1: $i] :
~ ( ~ ( ~ ( element @ SX1 @ SX0 )
| ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SX1 @ SX2 )
| ~ ( element @ SX2 @ SX1 ) ) )
| ~ ( ~ ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SX1 @ SX2 )
| ~ ( element @ SX2 @ SX1 ) )
| ( element @ SX1 @ SX0 ) ) ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[6]) ).
thf(8,plain,
( ( ~ ! [SY3: $i] :
~ ( ~ ( ~ ( element @ SY3 @ sK1_SX0 )
| ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SY3 @ SX2 )
| ~ ( element @ SX2 @ SY3 ) ) )
| ~ ( ~ ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SY3 @ SX2 )
| ~ ( element @ SX2 @ SY3 ) )
| ( element @ SY3 @ sK1_SX0 ) ) ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[7]) ).
thf(9,plain,
( ( ! [SY3: $i] :
~ ( ~ ( ~ ( element @ SY3 @ sK1_SX0 )
| ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SY3 @ SX2 )
| ~ ( element @ SX2 @ SY3 ) ) )
| ~ ( ~ ~ ~ ! [SX2: $i] :
~ ~ ( ~ ( element @ SY3 @ SX2 )
| ~ ( element @ SX2 @ SY3 ) )
| ( element @ SY3 @ sK1_SX0 ) ) ) )
= $true ),
inference(extcnf_not_neg,[status(thm)],[8]) ).
thf(10,plain,
! [SV1: $i] :
( ( ~ ( ~ ( ~ ( element @ SV1 @ sK1_SX0 )
| ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
| ~ ( ~ ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) )
| ( element @ SV1 @ sK1_SX0 ) ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[9]) ).
thf(11,plain,
! [SV1: $i] :
( ( ~ ( ~ ( element @ SV1 @ sK1_SX0 )
| ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
| ~ ( ~ ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) )
| ( element @ SV1 @ sK1_SX0 ) ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[10]) ).
thf(12,plain,
! [SV1: $i] :
( ( ~ ( ~ ( element @ SV1 @ sK1_SX0 )
| ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[11]) ).
thf(13,plain,
! [SV1: $i] :
( ( ~ ( ~ ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) )
| ( element @ SV1 @ sK1_SX0 ) ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[11]) ).
thf(14,plain,
! [SV1: $i] :
( ( ~ ( element @ SV1 @ sK1_SX0 )
| ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
= $true ),
inference(extcnf_not_neg,[status(thm)],[12]) ).
thf(15,plain,
! [SV1: $i] :
( ( ~ ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) )
| ( element @ SV1 @ sK1_SX0 ) )
= $true ),
inference(extcnf_not_neg,[status(thm)],[13]) ).
thf(16,plain,
! [SV1: $i] :
( ( ( ~ ( element @ SV1 @ sK1_SX0 ) )
= $true )
| ( ( ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
= $true ) ),
inference(extcnf_or_pos,[status(thm)],[14]) ).
thf(17,plain,
! [SV1: $i] :
( ( ( ~ ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_or_pos,[status(thm)],[15]) ).
thf(18,plain,
! [SV1: $i] :
( ( ( element @ SV1 @ sK1_SX0 )
= $false )
| ( ( ~ ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[16]) ).
thf(19,plain,
! [SV1: $i] :
( ( ( ~ ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[17]) ).
thf(20,plain,
! [SV1: $i] :
( ( ( ~ ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_pos,[status(thm)],[18]) ).
thf(21,plain,
! [SV1: $i] :
( ( ( ~ ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_neg,[status(thm)],[19]) ).
thf(22,plain,
! [SV1: $i] :
( ( ( ! [SY6: $i] :
~ ~ ( ~ ( element @ SV1 @ SY6 )
| ~ ( element @ SY6 @ SV1 ) ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_neg,[status(thm)],[20]) ).
thf(23,plain,
! [SV1: $i] :
( ( ( ! [SY7: $i] :
~ ~ ( ~ ( element @ SV1 @ SY7 )
| ~ ( element @ SY7 @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[21]) ).
thf(24,plain,
! [SV2: $i,SV1: $i] :
( ( ( ~ ~ ( ~ ( element @ SV1 @ SV2 )
| ~ ( element @ SV2 @ SV1 ) ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_forall_pos,[status(thm)],[22]) ).
thf(25,plain,
! [SV1: $i] :
( ( ( ~ ~ ( ~ ( element @ SV1 @ ( sK2_SY7 @ SV1 ) )
| ~ ( element @ ( sK2_SY7 @ SV1 ) @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_forall_neg,[status(esa)],[23]) ).
thf(26,plain,
! [SV2: $i,SV1: $i] :
( ( ( ~ ( ~ ( element @ SV1 @ SV2 )
| ~ ( element @ SV2 @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_pos,[status(thm)],[24]) ).
thf(27,plain,
! [SV1: $i] :
( ( ( ~ ( ~ ( element @ SV1 @ ( sK2_SY7 @ SV1 ) )
| ~ ( element @ ( sK2_SY7 @ SV1 ) @ SV1 ) ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_neg,[status(thm)],[25]) ).
thf(28,plain,
! [SV2: $i,SV1: $i] :
( ( ( ~ ( element @ SV1 @ SV2 )
| ~ ( element @ SV2 @ SV1 ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_neg,[status(thm)],[26]) ).
thf(29,plain,
! [SV1: $i] :
( ( ( ~ ( element @ SV1 @ ( sK2_SY7 @ SV1 ) )
| ~ ( element @ ( sK2_SY7 @ SV1 ) @ SV1 ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[27]) ).
thf(30,plain,
! [SV2: $i,SV1: $i] :
( ( ( ~ ( element @ SV1 @ SV2 ) )
= $true )
| ( ( ~ ( element @ SV2 @ SV1 ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_or_pos,[status(thm)],[28]) ).
thf(31,plain,
! [SV1: $i] :
( ( ( ~ ( element @ SV1 @ ( sK2_SY7 @ SV1 ) ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_or_neg,[status(thm)],[29]) ).
thf(32,plain,
! [SV1: $i] :
( ( ( ~ ( element @ ( sK2_SY7 @ SV1 ) @ SV1 ) )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_or_neg,[status(thm)],[29]) ).
thf(33,plain,
! [SV2: $i,SV1: $i] :
( ( ( element @ SV1 @ SV2 )
= $false )
| ( ( ~ ( element @ SV2 @ SV1 ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_pos,[status(thm)],[30]) ).
thf(34,plain,
! [SV1: $i] :
( ( ( element @ SV1 @ ( sK2_SY7 @ SV1 ) )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_neg,[status(thm)],[31]) ).
thf(35,plain,
! [SV1: $i] :
( ( ( element @ ( sK2_SY7 @ SV1 ) @ SV1 )
= $true )
| ( ( element @ SV1 @ sK1_SX0 )
= $true ) ),
inference(extcnf_not_neg,[status(thm)],[32]) ).
thf(36,plain,
! [SV1: $i,SV2: $i] :
( ( ( element @ SV2 @ SV1 )
= $false )
| ( ( element @ SV1 @ SV2 )
= $false )
| ( ( element @ SV1 @ sK1_SX0 )
= $false ) ),
inference(extcnf_not_pos,[status(thm)],[33]) ).
thf(37,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[34,36,35]) ).
thf(38,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[37]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SET786+1 : TPTP v9.3.1. Released v2.5.0.
% 0.00/0.04 % Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.11/0.16 % Computer : n001.cluster.edu
% 0.11/0.16 % Model : x86_64 x86_64
% 0.11/0.16 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.16 % Memory : 8046.5625MB
% 0.11/0.16 % OS : Linux 6.8.0-71-generic
% 0.11/0.16 % CPULimit : 300
% 0.11/0.16 % WCLimit : 300
% 0.11/0.16 % DateTime : Tue Oct 6 14:58:24 UTC 2026
% 0.11/0.16 % CPUTime :
% 0.11/0.16 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.11/0.19
% 0.11/0.19 No.of.Axioms: 0
% 0.11/0.19
% 0.11/0.19 Length.of.Defs: 0
% 0.11/0.19
% 0.11/0.19 Contains.Choice.Funs: false
% 0.11/0.19
% 0.11/0.19 ********************************
% 0.11/0.19 * All subproblems solved! *
% 0.11/0.19 ********************************
% 0.11/0.19 % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : (rf:1,axioms:0,ps:0,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:false,expand_extuni:false,foatp:e,atp_timeout:299,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:37,loop_count:0,foatp_calls:1,translation:fof_full)
% 0.11/0.19
% 0.11/0.19 %**** Beginning of derivation protocol ****
% 0.11/0.19 % SZS output start CNFRefutation
% See solution above
% 0.11/0.19
% 0.11/0.19 %**** End of derivation protocol ****
% 0.11/0.19 %**** no. of clauses in derivation: 38 ****
% 0.11/0.19 %**** clause counter: 37 ****
% 0.11/0.19
% 0.11/0.19 % SZS status Theorem for /export/starexec/sandbox2/benchmark/theBenchmark.p : (rf:1,axioms:0,ps:0,u:6,ude:true,rLeibEQ:true,rAndEQ:true,use_choice:true,use_extuni:true,use_extcnf_combined:false,expand_extuni:false,foatp:e,atp_timeout:299,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:37,loop_count:0,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------