%------------------------------------------------------------------------------
% File : Prover9---2026-6A
% Problem : NUM021-1 : TPTP v9.3.1. Bugfixed v4.0.0.
% Transfm : none
% Format : tptp:raw
% Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n015.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 : Sun Sep 27 08:16:03 AM UTC 2026
% Result : Unsatisfiable 0.13s 0.38s
% Output : CNFRefutation 0.13s
% Verified :
% SZS Type : Refutation
% Derivation depth : 7
% Number of leaves : 8
% Syntax : Number of formulae : 25 ( 12 unt; 0 def)
% Number of atoms : 44 ( 0 equ)
% Maximal formula atoms : 3 ( 1 avg)
% Number of connectives : 40 ( 21 ~; 19 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 7 ( 3 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 4 ( 3 usr; 1 prp; 0-2 aty)
% Number of functors : 6 ( 6 usr; 3 con; 0-2 aty)
% Number of variables : 30 ( 3 sgn 13 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(divides_only_less_or_equal,axiom,
! [VAR_0,VAR_1] :
( equalish(VAR_0,VAR_1)
| less(VAR_0,VAR_1)
| ~ divides(VAR_0,VAR_1) ),
file('theBenchmark.p',divides_only_less_or_equal) ).
cnf(c_2,plain,
( equalish(A,B)
| less(A,B)
| ~ divides(A,B) ),
inference(clausify,[status(thm)],[divides_only_less_or_equal]) ).
fof(impossible_c_divides_a,axiom,
divides(c,a),
file('theBenchmark.p',impossible_c_divides_a) ).
cnf(c_4,plain,
divides(c,a),
inference(clausify,[status(thm)],[impossible_c_divides_a]) ).
cnf(c_5,plain,
( equalish(c,a)
| less(c,a) ),
inference(resolve,[status(thm)],[c_4,c_2]) ).
fof(b_greater_equal_a,axiom,
~ less(b,a),
file('theBenchmark.p',b_greater_equal_a) ).
cnf(c_7,plain,
~ less(b,a),
inference(clausify,[status(thm)],[b_greater_equal_a]) ).
fof(b_less_than_c,axiom,
less(b,c),
file('theBenchmark.p',b_less_than_c) ).
cnf(c_8,plain,
less(b,c),
inference(clausify,[status(thm)],[b_less_than_c]) ).
fof(transitivity,axiom,
! [VAR_0,VAR_1,VAR_2] :
( equalish(VAR_0,VAR_2)
| ~ equalish(VAR_1,VAR_2)
| ~ equalish(VAR_0,VAR_1) ),
file('theBenchmark.p',transitivity) ).
cnf(c_9,plain,
( equalish(A,C)
| ~ equalish(B,C)
| ~ equalish(A,B) ),
inference(clausify,[status(thm)],[transitivity]) ).
fof(less_lemma,axiom,
! [VAR_0,VAR_1] :
( equalish(add(successor(predecessor_of_1st_minus_2nd(VAR_1,VAR_0)),VAR_0),VAR_1)
| ~ less(VAR_0,VAR_1) ),
file('theBenchmark.p',less_lemma) ).
cnf(c_12,plain,
( equalish(add(successor(predecessor_of_1st_minus_2nd(B,A)),A),B)
| ~ less(A,B) ),
inference(clausify,[status(thm)],[less_lemma]) ).
fof(smaller_number,axiom,
! [VAR_0,VAR_1,VAR_2] :
( less(VAR_1,VAR_2)
| ~ equalish(add(successor(VAR_0),VAR_1),VAR_2) ),
file('theBenchmark.p',smaller_number) ).
cnf(c_13,plain,
( less(B,C)
| ~ equalish(add(successor(A),B),C) ),
inference(clausify,[status(thm)],[smaller_number]) ).
fof(transitivity_of_less,axiom,
! [VAR_0,VAR_1,VAR_2] :
( less(VAR_2,VAR_1)
| ~ less(VAR_2,VAR_0)
| ~ less(VAR_0,VAR_1) ),
file('theBenchmark.p',transitivity_of_less) ).
cnf(c_14,plain,
( less(C,B)
| ~ less(C,A)
| ~ less(A,B) ),
inference(clausify,[status(thm)],[transitivity_of_less]) ).
cnf(c_22,plain,
equalish(add(successor(predecessor_of_1st_minus_2nd(c,b)),b),c),
inference(resolve,[status(thm)],[c_12,c_8]) ).
cnf(c_25,plain,
~ equalish(add(successor(A),b),a),
inference(resolve,[status(thm)],[c_13,c_7]) ).
cnf(c_71,plain,
( less(b,A)
| ~ less(c,A) ),
inference(resolve,[status(thm)],[c_14,c_8]) ).
cnf(c_30,plain,
~ less(c,a),
inference(resolve,[status(thm)],[c_71,c_7]) ).
cnf(c_31,plain,
equalish(c,a),
inference(resolve,[status(thm)],[c_30,c_5]) ).
cnf(c_72,plain,
( equalish(A,a)
| ~ equalish(A,c) ),
inference(resolve,[status(thm)],[c_9,c_31]) ).
cnf(c_69,plain,
~ equalish(add(successor(A),b),c),
inference(resolve,[status(thm)],[c_72,c_25]) ).
cnf(c_70,plain,
$false,
inference(resolve,[status(thm)],[c_69,c_22]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : NUM021-1 : TPTP v9.3.1. Bugfixed v4.0.0.
% 0.00/0.04 % Command : prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.10/0.36 % Computer : n015.cluster.edu
% 0.10/0.36 % Model : x86_64 x86_64
% 0.10/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.36 % Memory : 8046.5625MB
% 0.10/0.36 % OS : Linux 6.8.0-71-generic
% 0.10/0.36 % CPULimit : 300
% 0.10/0.36 % WCLimit : 300
% 0.10/0.36 % DateTime : Sat Sep 26 01:57:14 UTC 2026
% 0.13/0.36 % CPUTime :
% 0.13/0.37 % Prover9 (64) version 2026-6A, July 2026, CASC-J13.
% 0.13/0.37 % Process 2853510 was started by sandbox2 on n015,
% 0.13/0.37 % Sat Sep 26 01:57:14 2026
% 0.13/0.37 % The command was "/export/starexec/sandbox2/solver/bin/prover9 -casc 300 -f /export/starexec/sandbox2/benchmark/theBenchmark.p".
% 0.13/0.37
% 0.13/0.37 % From the command line: assign(max_seconds, 300).
% 0.13/0.38
% 0.13/0.38 % SZS status Unsatisfiable for theBenchmark
% 0.13/0.38
% 0.13/0.38 % Proof 1 at 0.00 (+ 0.00) seconds.
% 0.13/0.38 % Length of proof is 15.
% 0.13/0.38 % Level of proof is 4.
% 0.13/0.38 % Maximum clause weight is 11.000.
% 0.13/0.38 % Given clauses 22.
% 0.13/0.38
% 0.13/0.38 % SZS output start CNFRefutation for theBenchmark
% See solution above
%------------------------------------------------------------------------------