%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : HEN005-2 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% Computer : n009.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 07:31:45 AM UTC 2026
% Result : Unsatisfiable 7.83s 3.72s
% Output : CNFRefutation 7.83s
% Verified :
% SZS Type : Refutation
% Derivation depth : 14
% Number of leaves : 11
% Syntax : Number of clauses : 42 ( 21 unt; 0 nHn; 35 RR)
% Number of literals : 84 ( 12 equ; 44 neg)
% Maximal clause size : 6 ( 2 avg)
% Maximal term depth : 3 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-3 aty)
% Number of functors : 5 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 78 ( 2 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(x_divde_zero_is_x,axiom,
quotient(X0,zero,X0) ).
cnf(xLEy,hypothesis,
'less$uequal'(x,y) ).
cnf(yLEz,hypothesis,
'less$uequal'(y,z) ).
cnf(prove_transitivity_of_less_equal,negated_conjecture,
~ 'less$uequal'(x,z) ).
cnf(quotient_less_equal,axiom,
( quotient(X0,X1,zero)
| ~ 'less$uequal'(X0,X1) ) ).
cnf(less_equal_quotient,axiom,
( 'less$uequal'(X0,X1)
| ~ quotient(X0,X1,zero) ) ).
cnf(quotient_property,axiom,
( 'less$uequal'(X6,X7)
| ~ quotient(X2,X3,X7)
| ~ quotient(X5,X4,X6)
| ~ quotient(X0,X3,X5)
| ~ quotient(X1,X3,X4)
| ~ quotient(X0,X1,X2) ) ).
cnf(zero_is_smallest,axiom,
'less$uequal'(zero,X0) ).
cnf(less_equal_and_equal,axiom,
( X0 = X1
| ~ 'less$uequal'(X1,X0)
| ~ 'less$uequal'(X0,X1) ) ).
cnf(closure,axiom,
quotient(X0,X1,divide(X0,X1)) ).
cnf(well_defined,axiom,
( X2 = X3
| ~ quotient(X0,X1,X3)
| ~ quotient(X0,X1,X2) ) ).
cnf(c3,plain,
quotient(X0,zero,X0),
inference(clausification,[status(esa)],[x_divde_zero_is_x]) ).
cnf(c4,plain,
'less$uequal'(x,y),
inference(clausification,[status(esa)],[xLEy]) ).
cnf(c5,plain,
'less$uequal'(y,z),
inference(clausification,[status(esa)],[yLEz]) ).
cnf(c6,plain,
~ 'less$uequal'(x,z),
inference(clausification,[status(esa)],[prove_transitivity_of_less_equal]) ).
cnf(c7,plain,
( quotient(X0,X1,zero)
| ~ 'less$uequal'(X0,X1) ),
inference(clausification,[status(esa)],[quotient_less_equal]) ).
cnf(c8,plain,
( 'less$uequal'(X0,X1)
| ~ quotient(X0,X1,zero) ),
inference(clausification,[status(esa)],[less_equal_quotient]) ).
cnf(c10,plain,
( ~ quotient(X6,X2,X7)
| ~ quotient(X5,X0,X3)
| 'less$uequal'(X7,X4)
| ~ quotient(X5,X1,X6)
| ~ quotient(X3,X1,X4)
| ~ quotient(X0,X1,X2) ),
inference(clausification,[status(esa)],[quotient_property]) ).
cnf(c11,plain,
'less$uequal'(zero,X0),
inference(clausification,[status(esa)],[zero_is_smallest]) ).
cnf(c12,plain,
( X0 = X1
| ~ 'less$uequal'(X1,X0)
| ~ 'less$uequal'(X0,X1) ),
inference(clausification,[status(esa)],[less_equal_and_equal]) ).
cnf(c14,plain,
quotient(X0,X1,divide(X0,X1)),
inference(clausification,[status(esa)],[closure]) ).
cnf(c15,plain,
( X2 = X3
| ~ quotient(X0,X1,X3)
| ~ quotient(X0,X1,X2) ),
inference(clausification,[status(esa)],[well_defined]) ).
cnf(d0,plain,
( ~ 'less$uequal'(X0,zero)
| zero = X0 ),
inference(resolution,[status(thm)],[c12,c11]) ).
cnf(d1,plain,
( ~ quotient(X0,X1,X2)
| divide(X0,X1) = X2 ),
inference(resolution,[status(thm)],[c15,c14]) ).
cnf(d2,plain,
divide(X0,zero) = X0,
inference(resolution,[status(thm)],[d1,c3]) ).
cnf(d3,plain,
( ~ 'less$uequal'(X1,X2)
| ~ quotient(X1,X2,X0)
| zero = X0 ),
inference(resolution,[status(thm)],[c15,c7]) ).
cnf(d4,plain,
( ~ 'less$uequal'(X0,X1)
| zero = divide(X0,X1) ),
inference(resolution,[status(thm)],[d3,c14]) ).
cnf(d5,plain,
zero = divide(x,y),
inference(resolution,[status(thm)],[d4,c4]) ).
cnf(d6,plain,
quotient(x,y,zero),
inference(superposition,[status(thm)],[d5,c14]) ).
cnf(d7,plain,
( 'less$uequal'(divide(X5,X2),X6)
| ~ quotient(X4,X1,X6)
| ~ quotient(X3,X1,X5)
| ~ quotient(X3,X0,X4)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[c10,c14]) ).
cnf(d8,plain,
( 'less$uequal'(divide(X4,divide(X5,X1)),X2)
| ~ quotient(X3,X5,X0)
| ~ quotient(X3,X1,X4)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d7,c14]) ).
cnf(d9,plain,
( ~ 'less$uequal'(X2,X3)
| 'less$uequal'(divide(X4,divide(X1,X3)),zero)
| ~ quotient(X0,X3,X4)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d8,c7]) ).
cnf(d10,plain,
( 'less$uequal'(divide(X1,divide(y,X0)),zero)
| ~ 'less$uequal'(zero,X0)
| ~ quotient(x,X0,X1) ),
inference(resolution,[status(thm)],[d9,d6]) ).
cnf(d11,plain,
( 'less$uequal'(divide(X1,divide(y,X0)),zero)
| ~ quotient(x,X0,X1) ),
inference(resolution,[status(thm)],[c11,d10]) ).
cnf(d12,plain,
zero = divide(y,z),
inference(resolution,[status(thm)],[d4,c5]) ).
cnf(d13,plain,
( ~ quotient(x,z,X0)
| 'less$uequal'(divide(X0,zero),zero) ),
inference(superposition,[status(thm)],[d12,d11]) ).
cnf(d14,plain,
( 'less$uequal'(X0,zero)
| ~ quotient(x,z,X0) ),
inference(demodulation,[status(thm)],[d13,d2]) ).
cnf(d15,plain,
'less$uequal'(divide(x,z),zero),
inference(resolution,[status(thm)],[d14,c14]) ).
cnf(d16,plain,
zero = divide(x,z),
inference(resolution,[status(thm)],[d15,d0]) ).
cnf(d17,plain,
quotient(x,z,zero),
inference(superposition,[status(thm)],[d16,c14]) ).
cnf(d18,plain,
'less$uequal'(x,z),
inference(resolution,[status(thm)],[d17,c8]) ).
cnf(d19,plain,
$false,
inference(resolution,[status(thm)],[c6,d18]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : HEN005-2 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.07 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.18/0.44 % Computer : n009.cluster.edu
% 0.18/0.44 % Model : x86_64 x86_64
% 0.18/0.44 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.18/0.44 % Memory : 8046.5625MB
% 0.18/0.44 % OS : Linux 6.8.0-71-generic
% 0.18/0.44 % CPULimit : 300
% 0.18/0.44 % WCLimit : 300
% 0.18/0.44 % DateTime : Fri Sep 25 15:56:29 UTC 2026
% 0.18/0.44 % CPUTime :
% 0.18/0.44 Running casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 7.83/3.72 % SZS status Unsatisfiable for theBenchmark.p
% 7.83/3.72 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------