%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : SYO024^1 : 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/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n008.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 0.08s 0.19s
% Output : CNFRefutation 0.08s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 2
% Syntax : Number of formulae : 15 ( 14 unt; 0 typ; 1 def)
% Number of atoms : 48 ( 14 equ; 6 cnn)
% Maximal formula atoms : 2 ( 3 avg)
% Number of connectives : 74 ( 35 ~; 11 |; 6 &; 19 @)
% ( 0 <=>; 3 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 1 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 10 ( 10 >; 0 *; 0 +; 0 <<)
% Number of symbols : 8 ( 4 usr; 5 con; 0-2 aty)
% Number of variables : 26 ( 24 ^; 2 !; 0 ?; 26 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_leibeq,type,
leibeq: ( $o > $o > $o ) > ( $o > $o > $o ) > $o ).
thf(tp_sK1_SY4,type,
sK1_SY4: ( $o > $o > $o ) > $o ).
thf(tp_sK2_E,type,
sK2_E: $o ).
thf(tp_sK3_E,type,
sK3_E: $o ).
thf(leibeq,definition,
( leibeq
= ( ^ [X: $o > $o > $o,Y: $o > $o > $o] :
! [P: ( $o > $o > $o ) > $o] :
( ( P @ X )
=> ( P @ Y ) ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',leibeq) ).
thf(1,conjecture,
( leibeq @ (&)
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',conj) ).
thf(2,negated_conjecture,
( ( leibeq @ (&)
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) )
= $false ),
inference(negate_conjecture,[status(cth)],[1]) ).
thf(3,plain,
( ( ! [SY4: ( $o > $o > $o ) > $o] :
( ( SY4 @ (&) )
=> ( SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) ) ) )
= $false ),
inference(unfold_def,[status(thm)],[2,leibeq]) ).
thf(4,plain,
( ( ( sK1_SY4 @ (&) )
=> ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[3]) ).
thf(5,plain,
( ( sK1_SY4 @ (&) )
= $true ),
inference(standard_cnf,[status(thm)],[4]) ).
thf(6,plain,
( ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) )
= $false ),
inference(standard_cnf,[status(thm)],[4]) ).
thf(7,plain,
( ( ~ ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) ) )
= $true ),
inference(polarity_switch,[status(thm)],[6]) ).
thf(8,plain,
( ( sK1_SY4 @ (&) )
= $true ),
inference(copy,[status(thm)],[5]) ).
thf(9,plain,
( ( ~ ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) ) )
= $true ),
inference(copy,[status(thm)],[7]) ).
thf(10,plain,
( ( sK1_SY4
@ ^ [SX0: $o,SX1: $o] :
~ ( ~ SX0
| ~ SX1 ) )
= $true ),
inference(unfold_def,[status(thm)],[8,leibeq]) ).
thf(11,plain,
( ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) )
= $false ),
inference(extcnf_not_pos,[status(thm)],[9]) ).
thf(12,plain,
( ( ( sK1_SY4
@ ^ [X: $o,Y: $o] :
~ ( ~ X
| ~ Y ) )
= ( sK1_SY4
@ ^ [SX0: $o,SX1: $o] :
~ ( ~ SX0
| ~ SX1 ) ) )
= $false ),
inference(res,[status(thm)],[11,10]) ).
thf(13,plain,
$false = $true,
inference(extuni,[status(esa)],[12]) ).
thf(14,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[13]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYO024^1 : 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/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.08/0.16 % Computer : n008.cluster.edu
% 0.08/0.16 % Model : x86_64 x86_64
% 0.08/0.16 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.16 % Memory : 8046.5625MB
% 0.08/0.16 % OS : Linux 6.8.0-71-generic
% 0.08/0.16 % CPULimit : 300
% 0.08/0.16 % WCLimit : 300
% 0.08/0.16 % DateTime : Tue Oct 6 17:31:39 UTC 2026
% 0.08/0.17 % CPUTime :
% 0.08/0.17 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.08/0.19
% 0.08/0.19 No.of.Axioms: 0
% 0.08/0.19
% 0.08/0.19 Length.of.Defs: 180
% 0.08/0.19
% 0.08/0.19 Contains.Choice.Funs: false
% 0.08/0.19
% 0.08/0.19 ********************************
% 0.08/0.19 * All subproblems solved! *
% 0.08/0.19 ********************************
% 0.08/0.19 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:1,axioms:1,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:13,loop_count:2,foatp_calls:1,translation:fof_full)
% 0.08/0.19
% 0.08/0.19 %**** Beginning of derivation protocol ****
% 0.08/0.19 % SZS output start CNFRefutation
% See solution above
% 0.08/0.19
% 0.08/0.19 %**** End of derivation protocol ****
% 0.08/0.19 %**** no. of clauses in derivation: 14 ****
% 0.08/0.19 %**** clause counter: 13 ****
% 0.08/0.19
% 0.08/0.19 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:1,axioms:1,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:13,loop_count:2,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------