%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : SYO019^1 : TPTP v9.3.1. Released v3.7.0.
% 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 : n006.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 11:07:23 AM UTC 2026
% Result : Theorem 0.10s 0.22s
% Output : CNFRefutation 0.10s
% Verified :
% SZS Type : Refutation
% Derivation depth : 16
% Number of leaves : 1
% Syntax : Number of formulae : 42 ( 35 unt; 0 typ; 0 def)
% Number of atoms : 181 ( 46 equ; 0 cnn)
% Maximal formula atoms : 2 ( 4 avg)
% Number of connectives : 166 ( 105 ~; 39 |; 11 &; 0 @)
% ( 5 <=>; 6 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 1 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 5 ( 2 usr; 4 con; 0-2 aty)
% Number of variables : 7 ( 0 ^; 7 !; 0 ?; 7 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_sK1_X,type,
sK1_X: $o ).
thf(tp_sK2_SY2,type,
sK2_SY2: $o ).
thf(1,conjecture,
! [X: $o,Y: $o] :
( ( X
& Y )
<=> ~ ( ~ X
| ~ Y ) ),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',conj) ).
thf(2,negated_conjecture,
( ( ! [X: $o,Y: $o] :
( ( X
& Y )
<=> ~ ( ~ X
| ~ Y ) ) )
= $false ),
inference(negate_conjecture,[status(cth)],[1]) ).
thf(3,plain,
( ( ! [X: $o,Y: $o] :
( ( X
& Y )
<=> ~ ( ~ X
| ~ Y ) ) )
= $false ),
inference(unfold_def,[status(thm)],[2]) ).
thf(4,plain,
( ( ! [SY2: $o] :
( ( sK1_X
& SY2 )
<=> ~ ( ~ sK1_X
| ~ SY2 ) ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[3]) ).
thf(5,plain,
( ( ( sK1_X
& sK2_SY2 )
<=> ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[4]) ).
thf(6,plain,
( ( ( sK1_X
& sK2_SY2 )
=> ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(split_conjecture,[split_conjecture(split,[])],[5]) ).
thf(7,plain,
( ( ~ ( ~ sK1_X
| ~ sK2_SY2 )
=> ( sK1_X
& sK2_SY2 ) )
= $false ),
inference(split_conjecture,[split_conjecture(split,[])],[5]) ).
thf(8,plain,
( ( ~ ( ( sK1_X
& sK2_SY2 )
=> ~ ( ~ sK1_X
| ~ sK2_SY2 ) ) )
= $true ),
inference(polarity_switch,[status(thm)],[6]) ).
thf(9,plain,
( ( ~ ( ~ ( ~ sK1_X
| ~ sK2_SY2 )
=> ( sK1_X
& sK2_SY2 ) ) )
= $true ),
inference(polarity_switch,[status(thm)],[7]) ).
thf(10,plain,
( ( ~ ( ( sK1_X
& sK2_SY2 )
=> ~ ( ~ sK1_X
| ~ sK2_SY2 ) ) )
= $true ),
inference(copy,[status(thm)],[8]) ).
thf(11,plain,
( ( ~ ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 )
| ~ ( ~ sK1_X
| ~ sK2_SY2 ) ) )
= $true ),
inference(unfold_def,[status(thm)],[10]) ).
thf(12,plain,
( ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 )
| ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[11]) ).
thf(13,plain,
( ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[12]) ).
thf(14,plain,
( ( ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[12]) ).
thf(15,plain,
( ( ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $true ),
inference(extcnf_not_neg,[status(thm)],[13]) ).
thf(16,plain,
( ( ~ sK1_X
| ~ sK2_SY2 )
= $true ),
inference(extcnf_not_neg,[status(thm)],[14]) ).
thf(17,plain,
( ( ~ sK1_X
| ~ sK2_SY2 )
= $false ),
inference(extcnf_not_pos,[status(thm)],[15]) ).
thf(18,plain,
( ( ( ~ sK1_X ) = $true )
| ( ( ~ sK2_SY2 ) = $true ) ),
inference(extcnf_or_pos,[status(thm)],[16]) ).
thf(19,plain,
( ( ~ sK1_X ) = $false ),
inference(extcnf_or_neg,[status(thm)],[17]) ).
thf(20,plain,
( ( ~ sK2_SY2 ) = $false ),
inference(extcnf_or_neg,[status(thm)],[17]) ).
thf(21,plain,
( ( sK1_X = $false )
| ( ( ~ sK2_SY2 ) = $true ) ),
inference(extcnf_not_pos,[status(thm)],[18]) ).
thf(22,plain,
sK1_X = $true,
inference(extcnf_not_neg,[status(thm)],[19]) ).
thf(23,plain,
sK2_SY2 = $true,
inference(extcnf_not_neg,[status(thm)],[20]) ).
thf(24,plain,
( ( sK2_SY2 = $false )
| ( sK1_X = $false ) ),
inference(extcnf_not_pos,[status(thm)],[21]) ).
thf(25,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[22,24,23]) ).
thf(26,plain,
( ( ~ ( ~ ( ~ sK1_X
| ~ sK2_SY2 )
=> ( sK1_X
& sK2_SY2 ) ) )
= $true ),
inference(copy,[status(thm)],[9]) ).
thf(27,plain,
( ( ~ ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 )
| ~ ( ~ sK1_X
| ~ sK2_SY2 ) ) )
= $true ),
inference(unfold_def,[status(thm)],[26]) ).
thf(28,plain,
( ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 )
| ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[27]) ).
thf(29,plain,
( ( ~ ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[28]) ).
thf(30,plain,
( ( ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $false ),
inference(extcnf_or_neg,[status(thm)],[28]) ).
thf(31,plain,
( ( ~ ( ~ sK1_X
| ~ sK2_SY2 ) )
= $true ),
inference(extcnf_not_neg,[status(thm)],[29]) ).
thf(32,plain,
( ( ~ sK1_X
| ~ sK2_SY2 )
= $true ),
inference(extcnf_not_neg,[status(thm)],[30]) ).
thf(33,plain,
( ( ~ sK1_X
| ~ sK2_SY2 )
= $false ),
inference(extcnf_not_pos,[status(thm)],[31]) ).
thf(34,plain,
( ( ( ~ sK1_X ) = $true )
| ( ( ~ sK2_SY2 ) = $true ) ),
inference(extcnf_or_pos,[status(thm)],[32]) ).
thf(35,plain,
( ( ~ sK1_X ) = $false ),
inference(extcnf_or_neg,[status(thm)],[33]) ).
thf(36,plain,
( ( ~ sK2_SY2 ) = $false ),
inference(extcnf_or_neg,[status(thm)],[33]) ).
thf(37,plain,
( ( sK1_X = $false )
| ( ( ~ sK2_SY2 ) = $true ) ),
inference(extcnf_not_pos,[status(thm)],[34]) ).
thf(38,plain,
sK1_X = $true,
inference(extcnf_not_neg,[status(thm)],[35]) ).
thf(39,plain,
sK2_SY2 = $true,
inference(extcnf_not_neg,[status(thm)],[36]) ).
thf(40,plain,
( ( sK2_SY2 = $false )
| ( sK1_X = $false ) ),
inference(extcnf_not_pos,[status(thm)],[37]) ).
thf(41,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[38,40,39]) ).
thf(42,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[41,25]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYO019^1 : TPTP v9.3.1. Released v3.7.0.
% 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
% 0.10/0.18 % Computer : n006.cluster.edu
% 0.10/0.18 % Model : x86_64 x86_64
% 0.10/0.18 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.18 % Memory : 8046.5625MB
% 0.10/0.18 % OS : Linux 6.8.0-71-generic
% 0.10/0.18 % CPULimit : 300
% 0.10/0.18 % WCLimit : 300
% 0.10/0.18 % DateTime : Tue Oct 6 17:30:22 UTC 2026
% 0.10/0.18 % CPUTime :
% 0.10/0.18 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox2/solver/bin/eprover /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.10/0.22
% 0.10/0.22 No.of.Axioms: 0
% 0.10/0.22
% 0.10/0.22 Length.of.Defs: 0
% 0.10/0.22
% 0.10/0.22 Contains.Choice.Funs: false
% 0.10/0.22
% 0.10/0.22 ********************************
% 0.10/0.22 * All subproblems solved! *
% 0.10/0.22 ********************************
% 0.10/0.22 % 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:25,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:41,loop_count:0,foatp_calls:1,translation:fof_full)
% 0.10/0.22
% 0.10/0.22 %**** Beginning of derivation protocol ****
% 0.10/0.22 % SZS output start CNFRefutation
% See solution above
% 0.10/0.22
% 0.10/0.22 %**** End of derivation protocol ****
% 0.10/0.22 %**** no. of clauses in derivation: 42 ****
% 0.10/0.22 %**** clause counter: 41 ****
% 0.10/0.22
% 0.10/0.22 % 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:25,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:41,loop_count:0,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------