%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : NUM648^1 : 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 : n018.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 10:34:46 AM UTC 2026
% Result : Theorem 0.13s 0.19s
% Output : CNFRefutation 0.13s
% Verified :
% SZS Type : Refutation
% Derivation depth : 10
% Number of leaves : 2
% Syntax : Number of formulae : 24 ( 20 unt; 0 typ; 0 def)
% Number of atoms : 89 ( 64 equ; 0 cnn)
% Maximal formula atoms : 3 ( 3 avg)
% Number of connectives : 90 ( 7 ~; 6 |; 0 &; 64 @)
% ( 0 <=>; 13 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 2 avg)
% Number of types : 1 ( 1 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 8 ( 5 usr; 6 con; 0-2 aty)
% Number of variables : 34 ( 0 ^; 34 !; 0 ?; 34 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_nat,type,
nat: $tType ).
thf(tp_pl,type,
pl: nat > nat > nat ).
thf(tp_sK1_Xx_0,type,
sK1_Xx_0: nat ).
thf(tp_sK2_SY5,type,
sK2_SY5: nat ).
thf(tp_x,type,
x: nat ).
thf(tp_y,type,
y: nat ).
thf(1,axiom,
! [Xx: nat,Xy: nat,Xz: nat] :
( ( ( pl @ Xx @ Xy )
= ( pl @ Xx @ Xz ) )
=> ( Xy = Xz ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',satz8a) ).
thf(2,conjecture,
! [Xx_0: nat,Xy_0: nat] :
( ( x
= ( pl @ y @ Xx_0 ) )
=> ( ( x
= ( pl @ y @ Xy_0 ) )
=> ( Xx_0 = Xy_0 ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',satz8b) ).
thf(3,negated_conjecture,
( ( ! [Xx_0: nat,Xy_0: nat] :
( ( x
= ( pl @ y @ Xx_0 ) )
=> ( ( x
= ( pl @ y @ Xy_0 ) )
=> ( Xx_0 = Xy_0 ) ) ) )
= $false ),
inference(negate_conjecture,[status(cth)],[2]) ).
thf(4,plain,
( ( ! [Xx_0: nat,Xy_0: nat] :
( ( x
= ( pl @ y @ Xx_0 ) )
=> ( ( x
= ( pl @ y @ Xy_0 ) )
=> ( Xx_0 = Xy_0 ) ) ) )
= $false ),
inference(unfold_def,[status(thm)],[3]) ).
thf(5,plain,
( ( ! [Xx: nat,Xy: nat,Xz: nat] :
( ( ( pl @ Xx @ Xy )
= ( pl @ Xx @ Xz ) )
=> ( Xy = Xz ) ) )
= $true ),
inference(unfold_def,[status(thm)],[1]) ).
thf(6,plain,
( ( ! [SY5: nat] :
( ( x
= ( pl @ y @ sK1_Xx_0 ) )
=> ( ( x
= ( pl @ y @ SY5 ) )
=> ( sK1_Xx_0 = SY5 ) ) ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[4]) ).
thf(7,plain,
( ( ( x
= ( pl @ y @ sK1_Xx_0 ) )
=> ( ( x
= ( pl @ y @ sK2_SY5 ) )
=> ( sK1_Xx_0 = sK2_SY5 ) ) )
= $false ),
inference(extcnf_forall_neg,[status(esa)],[6]) ).
thf(8,plain,
( ( x
= ( pl @ y @ sK1_Xx_0 ) )
= $true ),
inference(standard_cnf,[status(thm)],[7]) ).
thf(9,plain,
( ( x
= ( pl @ y @ sK2_SY5 ) )
= $true ),
inference(standard_cnf,[status(thm)],[7]) ).
thf(10,plain,
( ( sK1_Xx_0 = sK2_SY5 )
= $false ),
inference(standard_cnf,[status(thm)],[7]) ).
thf(11,plain,
( ( sK1_Xx_0 != sK2_SY5 )
= $true ),
inference(polarity_switch,[status(thm)],[10]) ).
thf(12,plain,
( ( ! [Xx: nat,Xy: nat,Xz: nat] :
( ( ( pl @ Xx @ Xy )
= ( pl @ Xx @ Xz ) )
=> ( Xy = Xz ) ) )
= $true ),
inference(copy,[status(thm)],[5]) ).
thf(13,plain,
( ( x
= ( pl @ y @ sK2_SY5 ) )
= $true ),
inference(copy,[status(thm)],[9]) ).
thf(14,plain,
( ( x
= ( pl @ y @ sK1_Xx_0 ) )
= $true ),
inference(copy,[status(thm)],[8]) ).
thf(15,plain,
( ( sK1_Xx_0 != sK2_SY5 )
= $true ),
inference(copy,[status(thm)],[11]) ).
thf(16,plain,
( ( ! [SX0: nat,SX1: nat,SX2: nat] :
( ( ( pl @ SX0 @ SX1 )
!= ( pl @ SX0 @ SX2 ) )
| ( SX1 = SX2 ) ) )
= $true ),
inference(unfold_def,[status(thm)],[12]) ).
thf(17,plain,
( ( sK1_Xx_0 = sK2_SY5 )
= $false ),
inference(extcnf_not_pos,[status(thm)],[15]) ).
thf(18,plain,
! [SV1: nat] :
( ( ! [SY6: nat,SY7: nat] :
( ( ( pl @ SV1 @ SY6 )
!= ( pl @ SV1 @ SY7 ) )
| ( SY6 = SY7 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[16]) ).
thf(19,plain,
! [SV2: nat,SV1: nat] :
( ( ! [SY8: nat] :
( ( ( pl @ SV1 @ SV2 )
!= ( pl @ SV1 @ SY8 ) )
| ( SV2 = SY8 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[18]) ).
thf(20,plain,
! [SV3: nat,SV2: nat,SV1: nat] :
( ( ( ( pl @ SV1 @ SV2 )
!= ( pl @ SV1 @ SV3 ) )
| ( SV2 = SV3 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[19]) ).
thf(21,plain,
! [SV3: nat,SV2: nat,SV1: nat] :
( ( ( ( pl @ SV1 @ SV2 )
!= ( pl @ SV1 @ SV3 ) )
= $true )
| ( ( SV2 = SV3 )
= $true ) ),
inference(extcnf_or_pos,[status(thm)],[20]) ).
thf(22,plain,
! [SV3: nat,SV2: nat,SV1: nat] :
( ( ( ( pl @ SV1 @ SV2 )
= ( pl @ SV1 @ SV3 ) )
= $false )
| ( ( SV2 = SV3 )
= $true ) ),
inference(extcnf_not_pos,[status(thm)],[21]) ).
thf(23,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[13,22,17,14]) ).
thf(24,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[23]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : NUM648^1 : TPTP v9.3.1. Released v3.7.0.
% 0.00/0.05 % Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.13/0.16 % Computer : n018.cluster.edu
% 0.13/0.16 % Model : x86_64 x86_64
% 0.13/0.16 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.16 % Memory : 8046.5625MB
% 0.13/0.16 % OS : Linux 6.8.0-71-generic
% 0.13/0.16 % CPULimit : 300
% 0.13/0.16 % WCLimit : 300
% 0.13/0.16 % DateTime : Tue Oct 6 13:34:21 UTC 2026
% 0.13/0.17 % CPUTime :
% 0.13/0.17 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.13/0.19
% 0.13/0.19 No.of.Axioms: 1
% 0.13/0.19
% 0.13/0.19 Length.of.Defs: 0
% 0.13/0.19
% 0.13/0.19 Contains.Choice.Funs: false
% 0.13/0.19
% 0.13/0.19 ********************************
% 0.13/0.19 * All subproblems solved! *
% 0.13/0.19 ********************************
% 0.13/0.19 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:3,ps:3,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:23,loop_count:0,foatp_calls:1,translation:fof_full)
% 0.13/0.19
% 0.13/0.19 %**** Beginning of derivation protocol ****
% 0.13/0.19 % SZS output start CNFRefutation
% See solution above
% 0.13/0.19
% 0.13/0.19 %**** End of derivation protocol ****
% 0.13/0.19 %**** no. of clauses in derivation: 24 ****
% 0.13/0.19 %**** clause counter: 23 ****
% 0.13/0.19
% 0.13/0.19 % SZS status Theorem for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:3,ps:3,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:23,loop_count:0,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------