%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : HEN004-1 : 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 : 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 : Sun Sep 27 07:31:44 AM UTC 2026
% Result : Unsatisfiable 9.87s 4.40s
% Output : CNFRefutation 9.87s
% Verified :
% SZS Type : Refutation
% Derivation depth : 23
% Number of leaves : 9
% Syntax : Number of clauses : 50 ( 25 unt; 0 nHn; 27 RR)
% Number of literals : 97 ( 19 equ; 49 neg)
% Maximal clause size : 6 ( 1 avg)
% Maximal term depth : 4 ( 1 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-3 aty)
% Number of functors : 3 ( 3 usr; 2 con; 0-2 aty)
% Number of variables : 115 ( 10 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(prove_x_divde_zero_is_x,negated_conjecture,
~ quotient(x,zero,x) ).
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(divisor_existence,axiom,
( 'less$uequal'(X2,X0)
| ~ quotient(X0,X1,X2) ) ).
cnf(quotient_property,axiom,
( 'less$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$uequal'(X0,X1) ) ).
cnf(closure,axiom,
quotient(X0,X1,divide(X0,X1)) ).
cnf(well_defined,axiom,
( X2 = X3
| ~ quotient(X0,X1,X3)
| ~ quotient(X0,X1,X2) ) ).
cnf(c0,plain,
~ quotient(x,zero,x),
inference(clausification,[status(esa)],[prove_x_divde_zero_is_x]) ).
cnf(c1,plain,
( quotient(X0,X1,zero)
| ~ 'less$uequal'(X0,X1) ),
inference(clausification,[status(esa)],[quotient_less_equal]) ).
cnf(c2,plain,
( 'less$uequal'(X0,X1)
| ~ quotient(X0,X1,zero) ),
inference(clausification,[status(esa)],[less_equal_quotient]) ).
cnf(c3,plain,
( 'less$uequal'(X2,X0)
| ~ quotient(X0,X1,X2) ),
inference(clausification,[status(esa)],[divisor_existence]) ).
cnf(c4,plain,
( ~ quotient(X7,X5,X3)
| ~ quotient(X6,X5,X2)
| ~ quotient(X6,X7,X4)
| ~ quotient(X4,X5,X1)
| ~ quotient(X2,X3,X0)
| 'less$uequal'(X0,X1) ),
inference(clausification,[status(esa)],[quotient_property]) ).
cnf(c5,plain,
'less$uequal'(zero,X0),
inference(clausification,[status(esa)],[zero_is_smallest]) ).
cnf(c6,plain,
( X0 = X1
| ~ 'less$uequal'(X1,X0)
| ~ 'less$uequal'(X0,X1) ),
inference(clausification,[status(esa)],[less_equal_and_equal]) ).
cnf(c8,plain,
quotient(X0,X1,divide(X0,X1)),
inference(clausification,[status(esa)],[closure]) ).
cnf(c9,plain,
( X2 = X3
| ~ quotient(X0,X1,X3)
| ~ quotient(X0,X1,X2) ),
inference(clausification,[status(esa)],[well_defined]) ).
cnf(d0,plain,
'less$uequal'(divide(X0,X1),X0),
inference(resolution,[status(thm)],[c3,c8]) ).
cnf(d1,plain,
( ~ 'less$uequal'(X0,divide(X0,X1))
| X0 = divide(X0,X1) ),
inference(resolution,[status(thm)],[c6,d0]) ).
cnf(d2,plain,
( ~ 'less$uequal'(X0,zero)
| X0 = zero ),
inference(resolution,[status(thm)],[c6,c5]) ).
cnf(d3,plain,
divide(zero,X0) = zero,
inference(resolution,[status(thm)],[d2,d0]) ).
cnf(d4,plain,
quotient(zero,X0,zero),
inference(superposition,[status(thm)],[d3,c8]) ).
cnf(d5,plain,
( ~ 'less$uequal'(X1,X2)
| ~ quotient(X1,X2,X0)
| X0 = zero ),
inference(resolution,[status(thm)],[c9,c1]) ).
cnf(d6,plain,
( ~ 'less$uequal'(X0,X1)
| divide(X0,X1) = zero ),
inference(resolution,[status(thm)],[d5,c8]) ).
cnf(d7,plain,
divide(divide(X0,X1),X0) = zero,
inference(resolution,[status(thm)],[d6,d0]) ).
cnf(d8,plain,
quotient(divide(X0,X1),X0,zero),
inference(superposition,[status(thm)],[d7,c8]) ).
cnf(d9,plain,
( 'less$uequal'(X6,X4)
| ~ quotient(X5,X0,X3)
| ~ quotient(divide(X5,X1),X2,X6)
| ~ quotient(X3,X1,X4)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[c4,c8]) ).
cnf(d10,plain,
( 'less$uequal'(divide(divide(X0,X3),X5),X4)
| ~ quotient(X1,X3,X5)
| ~ quotient(X2,X3,X4)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d9,c8]) ).
cnf(d11,plain,
( 'less$uequal'(divide(divide(X0,X2),X4),X3)
| ~ quotient(X1,X2,X4)
| ~ quotient(divide(X0,X1),X2,X3) ),
inference(resolution,[status(thm)],[d10,c8]) ).
cnf(d12,plain,
( 'less$uequal'(divide(divide(X1,X1),X2),zero)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d8,d11]) ).
cnf(d13,plain,
'less$uequal'(divide(divide(X0,X0),zero),zero),
inference(resolution,[status(thm)],[d12,d8]) ).
cnf(d14,plain,
divide(divide(X0,X0),zero) = zero,
inference(resolution,[status(thm)],[d13,d2]) ).
cnf(d15,plain,
quotient(divide(X0,X0),zero,zero),
inference(superposition,[status(thm)],[d14,c8]) ).
cnf(d16,plain,
'less$uequal'(divide(X0,X0),zero),
inference(resolution,[status(thm)],[d15,c2]) ).
cnf(d17,plain,
divide(X0,X0) = zero,
inference(resolution,[status(thm)],[d16,d2]) ).
cnf(d18,plain,
( 'less$uequal'(divide(divide(X3,X1),X2),divide(divide(X3,X0),X1))
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d11,c8]) ).
cnf(d19,plain,
( ~ 'less$uequal'(divide(divide(X3,X0),X1),divide(divide(X3,X1),X2))
| divide(divide(X3,X0),X1) = divide(divide(X3,X1),X2)
| ~ quotient(X0,X1,X2) ),
inference(resolution,[status(thm)],[d18,c6]) ).
cnf(d20,plain,
( ~ quotient(X1,divide(X0,X1),X2)
| divide(divide(X0,X1),divide(X0,X1)) = divide(divide(X0,divide(X0,X1)),X2)
| ~ 'less$uequal'(zero,divide(divide(X0,divide(X0,X1)),X2)) ),
inference(superposition,[status(thm)],[d17,d19]) ).
cnf(d21,plain,
( ~ 'less$uequal'(zero,divide(divide(X0,divide(X0,X1)),X2))
| ~ quotient(X1,divide(X0,X1),X2)
| zero = divide(divide(X0,divide(X0,X1)),X2) ),
inference(demodulation,[status(thm)],[d20,d17]) ).
cnf(d22,plain,
( ~ quotient(X1,divide(X0,X1),X2)
| zero = divide(divide(X0,divide(X0,X1)),X2) ),
inference(resolution,[status(thm)],[c5,d21]) ).
cnf(d23,plain,
zero = divide(divide(X0,divide(X0,zero)),zero),
inference(resolution,[status(thm)],[d22,d4]) ).
cnf(d24,plain,
quotient(divide(X0,divide(X0,zero)),zero,zero),
inference(superposition,[status(thm)],[d23,c8]) ).
cnf(d25,plain,
'less$uequal'(divide(X0,divide(X0,zero)),zero),
inference(resolution,[status(thm)],[d24,c2]) ).
cnf(d26,plain,
divide(X0,divide(X0,zero)) = zero,
inference(resolution,[status(thm)],[d25,d2]) ).
cnf(d27,plain,
quotient(X0,divide(X0,zero),zero),
inference(superposition,[status(thm)],[d26,c8]) ).
cnf(d28,plain,
'less$uequal'(X0,divide(X0,zero)),
inference(resolution,[status(thm)],[d27,c2]) ).
cnf(d29,plain,
X0 = divide(X0,zero),
inference(resolution,[status(thm)],[d28,d1]) ).
cnf(d30,plain,
quotient(X0,zero,X0),
inference(superposition,[status(thm)],[d29,c8]) ).
cnf(d31,plain,
$false,
inference(resolution,[status(thm)],[d30,c0]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.05 % Problem : HEN004-1 : 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 : n020.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 15:56:49 UTC 2026
% 0.18/0.44 % CPUTime :
% 0.18/0.44 Running casc-portfolio.sh -t 300 /export/starexec/sandbox2/benchmark/theBenchmark.p
% 9.87/4.40 % SZS status Unsatisfiable for theBenchmark.p
% 9.87/4.40 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------