%------------------------------------------------------------------------------
% File : LEO-II---2.3.1
% Problem : ROB005-1 : 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 : n020.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 10:37:55 AM UTC 2026
% Result : Unsatisfiable 82.43s 13.99s
% Output : CNFRefutation 82.43s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 6
% Syntax : Number of formulae : 32 ( 32 unt; 0 typ; 0 def)
% Number of atoms : 82 ( 49 equ; 0 cnn)
% Maximal formula atoms : 1 ( 2 avg)
% Number of connectives : 185 ( 6 ~; 0 |; 0 &; 179 @)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 4 ( 2 avg)
% Number of types : 1 ( 0 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of symbols : 8 ( 5 usr; 5 con; 0-2 aty)
% Number of variables : 38 ( 0 ^; 38 !; 0 ?; 38 :)
% Comments :
%------------------------------------------------------------------------------
thf(tp_a,type,
a: $i ).
thf(tp_add,type,
add: $i > $i > $i ).
thf(tp_b,type,
b: $i ).
thf(tp_c,type,
c: $i ).
thf(tp_negate,type,
negate: $i > $i ).
thf(1,axiom,
! [X: $i,Y: $i] :
( ( negate @ ( add @ ( negate @ ( add @ X @ Y ) ) @ ( negate @ ( add @ X @ ( negate @ Y ) ) ) ) )
= X ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',robbins_axiom) ).
thf(2,axiom,
! [X: $i,Y: $i,Z: $i] :
( ( add @ ( add @ X @ Y ) @ Z )
= ( add @ X @ ( add @ Y @ Z ) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',associativity_of_add) ).
thf(3,axiom,
! [X: $i,Y: $i] :
( ( add @ X @ Y )
= ( add @ Y @ X ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',commutativity_of_add) ).
thf(4,axiom,
( ( add @ c @ c )
= c ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',idempotence) ).
thf(5,conjecture,
$false,
file('no conjecture given, we try to refute the axioms',dummy_conjecture) ).
thf(6,negated_conjecture,
$false = $false,
inference(negate_conjecture,[status(cth)],[5]) ).
thf(7,negated_conjecture,
( ( add @ ( negate @ ( add @ a @ ( negate @ b ) ) ) @ ( negate @ ( add @ ( negate @ a ) @ ( negate @ b ) ) ) )
!= b ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',prove_huntingtons_axiom) ).
thf(8,plain,
$false = $false,
inference(unfold_def,[status(thm)],[6]) ).
thf(9,plain,
( ( ! [X: $i,Y: $i] :
( ( negate @ ( add @ ( negate @ ( add @ X @ Y ) ) @ ( negate @ ( add @ X @ ( negate @ Y ) ) ) ) )
= X ) )
= $true ),
inference(unfold_def,[status(thm)],[1]) ).
thf(10,plain,
( ( ! [X: $i,Y: $i,Z: $i] :
( ( add @ ( add @ X @ Y ) @ Z )
= ( add @ X @ ( add @ Y @ Z ) ) ) )
= $true ),
inference(unfold_def,[status(thm)],[2]) ).
thf(11,plain,
( ( ! [X: $i,Y: $i] :
( ( add @ X @ Y )
= ( add @ Y @ X ) ) )
= $true ),
inference(unfold_def,[status(thm)],[3]) ).
thf(12,plain,
( ( ( add @ c @ c )
= c )
= $true ),
inference(unfold_def,[status(thm)],[4]) ).
thf(13,plain,
( ( ( add @ ( negate @ ( add @ a @ ( negate @ b ) ) ) @ ( negate @ ( add @ ( negate @ a ) @ ( negate @ b ) ) ) )
!= b )
= $true ),
inference(unfold_def,[status(thm)],[7]) ).
thf(14,plain,
( ( ~ $false ) = $true ),
inference(polarity_switch,[status(thm)],[8]) ).
thf(15,plain,
( ( ( add @ ( negate @ ( add @ a @ ( negate @ b ) ) ) @ ( negate @ ( add @ ( negate @ a ) @ ( negate @ b ) ) ) )
!= b )
= $true ),
inference(copy,[status(thm)],[13]) ).
thf(16,plain,
( ( ( add @ c @ c )
= c )
= $true ),
inference(copy,[status(thm)],[12]) ).
thf(17,plain,
( ( ! [X: $i,Y: $i] :
( ( add @ X @ Y )
= ( add @ Y @ X ) ) )
= $true ),
inference(copy,[status(thm)],[11]) ).
thf(18,plain,
( ( ! [X: $i,Y: $i,Z: $i] :
( ( add @ ( add @ X @ Y ) @ Z )
= ( add @ X @ ( add @ Y @ Z ) ) ) )
= $true ),
inference(copy,[status(thm)],[10]) ).
thf(19,plain,
( ( ! [X: $i,Y: $i] :
( ( negate @ ( add @ ( negate @ ( add @ X @ Y ) ) @ ( negate @ ( add @ X @ ( negate @ Y ) ) ) ) )
= X ) )
= $true ),
inference(copy,[status(thm)],[9]) ).
thf(20,plain,
( ( ~ $false ) = $true ),
inference(copy,[status(thm)],[14]) ).
thf(21,plain,
( ( ( add @ ( negate @ ( add @ a @ ( negate @ b ) ) ) @ ( negate @ ( add @ ( negate @ a ) @ ( negate @ b ) ) ) )
!= b )
= $true ),
inference(unfold_def,[status(thm)],[15]) ).
thf(22,plain,
! [SV1: $i] :
( ( ! [SY7: $i] :
( ( add @ SV1 @ SY7 )
= ( add @ SY7 @ SV1 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[17]) ).
thf(23,plain,
! [SV2: $i] :
( ( ! [SY8: $i,SY9: $i] :
( ( add @ ( add @ SV2 @ SY8 ) @ SY9 )
= ( add @ SV2 @ ( add @ SY8 @ SY9 ) ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[18]) ).
thf(24,plain,
! [SV3: $i] :
( ( ! [SY10: $i] :
( ( negate @ ( add @ ( negate @ ( add @ SV3 @ SY10 ) ) @ ( negate @ ( add @ SV3 @ ( negate @ SY10 ) ) ) ) )
= SV3 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[19]) ).
thf(25,plain,
$false = $false,
inference(extcnf_not_pos,[status(thm)],[20]) ).
thf(26,plain,
( ( ( add @ ( negate @ ( add @ a @ ( negate @ b ) ) ) @ ( negate @ ( add @ ( negate @ a ) @ ( negate @ b ) ) ) )
= b )
= $false ),
inference(extcnf_not_pos,[status(thm)],[21]) ).
thf(27,plain,
! [SV4: $i,SV1: $i] :
( ( ( add @ SV1 @ SV4 )
= ( add @ SV4 @ SV1 ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[22]) ).
thf(28,plain,
! [SV5: $i,SV2: $i] :
( ( ! [SY11: $i] :
( ( add @ ( add @ SV2 @ SV5 ) @ SY11 )
= ( add @ SV2 @ ( add @ SV5 @ SY11 ) ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[23]) ).
thf(29,plain,
! [SV6: $i,SV3: $i] :
( ( ( negate @ ( add @ ( negate @ ( add @ SV3 @ SV6 ) ) @ ( negate @ ( add @ SV3 @ ( negate @ SV6 ) ) ) ) )
= SV3 )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[24]) ).
thf(30,plain,
! [SV7: $i,SV5: $i,SV2: $i] :
( ( ( add @ ( add @ SV2 @ SV5 ) @ SV7 )
= ( add @ SV2 @ ( add @ SV5 @ SV7 ) ) )
= $true ),
inference(extcnf_forall_pos,[status(thm)],[28]) ).
thf(31,plain,
$false = $true,
inference(fo_atp_e,[status(thm)],[16,30,29,27,26,25]) ).
thf(32,plain,
$false,
inference(solved_all_splits,[solved_all_splits(join,[])],[31]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.02 % Problem : ROB005-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.03 % Command : leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.09/0.15 % Computer : n020.cluster.edu
% 0.09/0.15 % Model : x86_64 x86_64
% 0.09/0.15 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.15 % Memory : 8046.5625MB
% 0.09/0.15 % OS : Linux 6.8.0-71-generic
% 0.09/0.15 % CPULimit : 300
% 0.09/0.15 % WCLimit : 300
% 0.09/0.15 % DateTime : Tue Oct 6 14:17:21 UTC 2026
% 0.09/0.15 % CPUTime :
% 0.09/0.15 Running leo --cores 7 --timeout 300 --proofoutput 1 --foatp e --atp e=/export/starexec/sandbox/solver/bin/eprover /export/starexec/sandbox/benchmark/theBenchmark.p
% 82.43/13.99
% 82.43/13.99 No.of.Axioms: 5
% 82.43/13.99
% 82.43/13.99 Length.of.Defs: 0
% 82.43/13.99
% 82.43/13.99 Contains.Choice.Funs: false
% 82.43/13.99
% 82.43/13.99 ********************************
% 82.43/13.99 * All subproblems solved! *
% 82.43/13.99 ********************************
% 82.43/13.99 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:5,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:299,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:31,loop_count:0,foatp_calls:1,translation:fof_full)
% 82.43/13.99
% 82.43/13.99 %**** Beginning of derivation protocol ****
% 82.43/13.99 % SZS output start CNFRefutation
% See solution above
% 82.43/13.99
% 82.43/13.99 %**** End of derivation protocol ****
% 82.43/13.99 %**** no. of clauses in derivation: 32 ****
% 82.43/13.99 %**** clause counter: 31 ****
% 82.43/13.99
% 82.43/13.99 % SZS status Unsatisfiable for /export/starexec/sandbox/benchmark/theBenchmark.p : (rf:0,axioms:5,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:299,atp_calls_frequency:5,ordering:none,proof_output:1,protocol_output:false,clause_count:31,loop_count:0,foatp_calls:1,translation:fof_full)
%------------------------------------------------------------------------------