%------------------------------------------------------------------------------
% File : LisaST---0.9
% Problem : LCL208-3 : TPTP v9.3.1. Released v2.3.0.
% Transfm : none
% Format : tptp:raw
% Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n002.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 07:54:04 AM UTC 2026
% Result : Unsatisfiable 184.48s 46.64s
% Output : CNFRefutation 184.48s
% Verified :
% SZS Type : Refutation
% Derivation depth : 27
% Number of leaves : 9
% Syntax : Number of clauses : 93 ( 49 unt; 0 nHn; 33 RR)
% Number of literals : 143 ( 2 equ; 52 neg)
% Maximal clause size : 3 ( 1 avg)
% Maximal term depth : 6 ( 2 avg)
% Number of predicates : 4 ( 2 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 2 con; 0-2 aty)
% Number of variables : 201 ( 26 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(prove_this,negated_conjecture,
~ theorem(implies(or(p,q),implies(not(p),q))) ).
cnf(axiom_1_2,axiom,
axiom(implies(or(X0,X0),X0)) ).
cnf(axiom_1_3,axiom,
axiom(implies(X0,or(X1,X0))) ).
cnf(axiom_1_4,axiom,
axiom(implies(or(X0,X1),or(X1,X0))) ).
cnf(axiom_1_5,axiom,
axiom(implies(or(X0,or(X1,X2)),or(X1,or(X0,X2)))) ).
cnf(axiom_1_6,axiom,
axiom(implies(implies(X0,X1),implies(or(X2,X0),or(X2,X1)))) ).
cnf(implies_definition,axiom,
implies(X0,X1) = or(not(X0),X1) ).
cnf(rule_1,axiom,
( ~ axiom(X0)
| theorem(X0) ) ).
cnf(rule_2,axiom,
( ~ theorem(X1)
| ~ theorem(implies(X1,X0))
| theorem(X0) ) ).
cnf(c0,plain,
~ theorem(implies(or(p,q),implies(not(p),q))),
inference(clausification,[status(esa)],[prove_this]) ).
cnf(c1,plain,
axiom(implies(or(X0,X0),X0)),
inference(clausification,[status(esa)],[axiom_1_2]) ).
cnf(c2,plain,
axiom(implies(X0,or(X1,X0))),
inference(clausification,[status(esa)],[axiom_1_3]) ).
cnf(c3,plain,
axiom(implies(or(X0,X1),or(X1,X0))),
inference(clausification,[status(esa)],[axiom_1_4]) ).
cnf(c4,plain,
axiom(implies(or(X0,or(X1,X2)),or(X1,or(X0,X2)))),
inference(clausification,[status(esa)],[axiom_1_5]) ).
cnf(c5,plain,
axiom(implies(implies(X0,X1),implies(or(X2,X0),or(X2,X1)))),
inference(clausification,[status(esa)],[axiom_1_6]) ).
cnf(c6,plain,
implies(X0,X1) = or(not(X0),X1),
inference(clausification,[status(esa)],[implies_definition]) ).
cnf(c7,plain,
( ~ axiom(X0)
| theorem(X0) ),
inference(clausification,[status(esa)],[rule_1]) ).
cnf(c8,plain,
( ~ theorem(X1)
| ~ theorem(implies(X1,X0))
| theorem(X0) ),
inference(clausification,[status(esa)],[rule_2]) ).
cnf(d0,plain,
theorem(implies(or(X0,or(X1,X2)),or(X1,or(X0,X2)))),
inference(resolution,[status(thm)],[c4,c7]) ).
cnf(d1,plain,
( ~ theorem(or(X1,or(X0,X2)))
| theorem(or(X0,or(X1,X2))) ),
inference(resolution,[status(thm)],[d0,c8]) ).
cnf(d2,plain,
( theorem(or(X1,or(not(X0),X2)))
| ~ theorem(implies(X0,or(X1,X2))) ),
inference(superposition,[status(thm)],[c6,d1]) ).
cnf(d3,plain,
( theorem(or(X2,implies(X0,X1)))
| ~ theorem(implies(X0,or(X2,X1))) ),
inference(demodulation,[status(thm)],[d2,c6]) ).
cnf(d4,plain,
( theorem(or(not(X0),implies(X2,X1)))
| ~ theorem(implies(X2,implies(X0,X1))) ),
inference(superposition,[status(thm)],[c6,d3]) ).
cnf(d5,plain,
( theorem(implies(X0,implies(X1,X2)))
| ~ theorem(implies(X1,implies(X0,X2))) ),
inference(demodulation,[status(thm)],[d4,c6]) ).
cnf(d6,plain,
theorem(implies(or(X0,X1),or(X1,X0))),
inference(resolution,[status(thm)],[c3,c7]) ).
cnf(d7,plain,
theorem(implies(or(X1,not(X0)),implies(X0,X1))),
inference(superposition,[status(thm)],[c6,d6]) ).
cnf(d8,plain,
( ~ theorem(or(X1,not(X0)))
| theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d7,c8]) ).
cnf(d9,plain,
( ~ theorem(or(X1,X0))
| theorem(or(X0,X1)) ),
inference(resolution,[status(thm)],[d6,c8]) ).
cnf(d10,plain,
( theorem(or(X1,not(X0)))
| ~ theorem(implies(X0,X1)) ),
inference(superposition,[status(thm)],[c6,d9]) ).
cnf(d11,plain,
( ~ theorem(implies(X1,not(X0)))
| theorem(implies(X0,not(X1))) ),
inference(superposition,[status(thm)],[c6,d10]) ).
cnf(d12,plain,
theorem(implies(or(X0,X0),X0)),
inference(resolution,[status(thm)],[c1,c7]) ).
cnf(d13,plain,
( ~ theorem(or(X0,X0))
| theorem(X0) ),
inference(resolution,[status(thm)],[c8,d12]) ).
cnf(d14,plain,
theorem(implies(X0,or(X1,X0))),
inference(resolution,[status(thm)],[c2,c7]) ).
cnf(d15,plain,
( ~ theorem(X1)
| theorem(or(X0,X1)) ),
inference(resolution,[status(thm)],[c8,d14]) ).
cnf(d16,plain,
( ~ theorem(or(X0,X2))
| theorem(or(X0,or(X1,X2))) ),
inference(resolution,[status(thm)],[d1,d15]) ).
cnf(d17,plain,
( ~ theorem(or(not(X0),X2))
| theorem(implies(X0,or(X1,X2))) ),
inference(superposition,[status(thm)],[c6,d16]) ).
cnf(d18,plain,
( ~ theorem(implies(X0,X1))
| theorem(implies(X0,or(X2,X1))) ),
inference(demodulation,[status(thm)],[d17,c6]) ).
cnf(d19,plain,
( ~ theorem(X0)
| theorem(or(X2,X1))
| ~ theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d18,c8]) ).
cnf(d20,plain,
( theorem(or(X2,or(X1,X0)))
| ~ theorem(or(X0,X1)) ),
inference(resolution,[status(thm)],[d19,d6]) ).
cnf(d21,plain,
( theorem(or(X1,or(X2,X0)))
| ~ theorem(or(X0,X1)) ),
inference(resolution,[status(thm)],[d20,d1]) ).
cnf(d22,plain,
( ~ theorem(or(X1,X2))
| theorem(or(X2,implies(X0,X1))) ),
inference(superposition,[status(thm)],[c6,d21]) ).
cnf(d23,plain,
( theorem(implies(X1,X0))
| ~ theorem(or(X0,implies(X1,X0))) ),
inference(resolution,[status(thm)],[d22,d13]) ).
cnf(d24,plain,
theorem(or(X0,implies(X1,X1))),
inference(resolution,[status(thm)],[d3,d14]) ).
cnf(d25,plain,
theorem(implies(X0,X0)),
inference(resolution,[status(thm)],[d24,d23]) ).
cnf(d26,plain,
theorem(implies(X0,not(not(X0)))),
inference(resolution,[status(thm)],[d25,d11]) ).
cnf(d27,plain,
theorem(or(X0,implies(or(X0,X1),X1))),
inference(resolution,[status(thm)],[d25,d3]) ).
cnf(d28,plain,
theorem(implies(implies(X0,X1),implies(or(X2,X0),or(X2,X1)))),
inference(resolution,[status(thm)],[c5,c7]) ).
cnf(d29,plain,
( ~ theorem(implies(X1,X2))
| theorem(implies(or(X0,X1),or(X0,X2))) ),
inference(resolution,[status(thm)],[d28,c8]) ).
cnf(d30,plain,
( ~ theorem(or(X2,X0))
| theorem(or(X2,X1))
| ~ theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d29,c8]) ).
cnf(d31,plain,
( theorem(or(X0,X2))
| ~ theorem(implies(implies(or(X0,X1),X1),X2)) ),
inference(resolution,[status(thm)],[d30,d27]) ).
cnf(d32,plain,
theorem(or(X0,not(not(implies(or(X0,X1),X1))))),
inference(resolution,[status(thm)],[d31,d26]) ).
cnf(d33,plain,
theorem(implies(not(implies(or(X0,X1),X1)),X0)),
inference(resolution,[status(thm)],[d32,d8]) ).
cnf(d34,plain,
theorem(implies(implies(X1,X2),implies(implies(X0,X1),or(not(X0),X2)))),
inference(superposition,[status(thm)],[c6,d28]) ).
cnf(d35,plain,
theorem(implies(implies(X2,X1),implies(implies(X0,X2),implies(X0,X1)))),
inference(demodulation,[status(thm)],[d34,c6]) ).
cnf(d36,plain,
( theorem(or(or(X2,X1),X0))
| ~ theorem(or(X0,X1)) ),
inference(resolution,[status(thm)],[d16,d9]) ).
cnf(d37,plain,
( theorem(or(X0,or(or(X3,X2),X1)))
| ~ theorem(or(or(X0,X1),X2)) ),
inference(resolution,[status(thm)],[d36,d1]) ).
cnf(d38,plain,
( theorem(or(or(X0,X1),X2))
| ~ theorem(or(or(or(or(X0,X1),X2),X2),X1)) ),
inference(resolution,[status(thm)],[d37,d13]) ).
cnf(d39,plain,
theorem(implies(implies(X0,X1),or(X1,not(X0)))),
inference(superposition,[status(thm)],[c6,d6]) ).
cnf(d40,plain,
( theorem(or(X2,X1))
| ~ theorem(implies(implies(X0,X0),X1)) ),
inference(resolution,[status(thm)],[d30,d24]) ).
cnf(d41,plain,
theorem(or(X0,or(X1,not(X1)))),
inference(resolution,[status(thm)],[d40,d39]) ).
cnf(d42,plain,
theorem(or(X0,or(X1,not(X0)))),
inference(resolution,[status(thm)],[d41,d1]) ).
cnf(d43,plain,
theorem(implies(X0,or(X1,not(not(X0))))),
inference(superposition,[status(thm)],[c6,d42]) ).
cnf(d44,plain,
( theorem(or(X1,X0))
| ~ theorem(or(X0,or(X1,X0))) ),
inference(resolution,[status(thm)],[d21,d13]) ).
cnf(d45,plain,
theorem(or(X0,not(X0))),
inference(resolution,[status(thm)],[d41,d44]) ).
cnf(d46,plain,
( theorem(or(X0,X1))
| ~ theorem(implies(not(X0),X1)) ),
inference(resolution,[status(thm)],[d45,d30]) ).
cnf(d47,plain,
theorem(or(X0,or(X1,not(not(not(X0)))))),
inference(resolution,[status(thm)],[d46,d43]) ).
cnf(d48,plain,
theorem(or(or(X0,not(not(not(X1)))),X1)),
inference(resolution,[status(thm)],[d47,d9]) ).
cnf(d49,plain,
theorem(or(or(X0,X1),not(not(not(X1))))),
inference(resolution,[status(thm)],[d48,d38]) ).
cnf(d50,plain,
theorem(implies(not(not(X0)),or(X1,X0))),
inference(resolution,[status(thm)],[d49,d8]) ).
cnf(d51,plain,
theorem(or(X0,implies(not(not(X1)),X1))),
inference(resolution,[status(thm)],[d50,d3]) ).
cnf(d52,plain,
theorem(or(implies(or(X0,X1),X1),X0)),
inference(resolution,[status(thm)],[d27,d9]) ).
cnf(d53,plain,
( ~ theorem(or(X2,X1))
| theorem(or(X2,implies(X0,X1))) ),
inference(superposition,[status(thm)],[c6,d16]) ).
cnf(d54,plain,
( theorem(implies(X0,X1))
| ~ theorem(or(implies(X0,X1),X1)) ),
inference(resolution,[status(thm)],[d53,d13]) ).
cnf(d55,plain,
( ~ theorem(or(implies(X0,or(X1,X2)),X2))
| theorem(implies(X0,or(X1,X2))) ),
inference(resolution,[status(thm)],[d54,d16]) ).
cnf(d56,plain,
theorem(implies(or(X0,or(X1,X0)),or(X1,X0))),
inference(resolution,[status(thm)],[d55,d52]) ).
cnf(d57,plain,
theorem(or(X0,implies(or(X1,or(X0,X1)),X1))),
inference(resolution,[status(thm)],[d56,d3]) ).
cnf(d58,plain,
theorem(implies(or(X0,or(X0,X0)),X0)),
inference(resolution,[status(thm)],[d57,d23]) ).
cnf(d59,plain,
( ~ theorem(or(X0,or(X0,X0)))
| theorem(X0) ),
inference(resolution,[status(thm)],[d58,c8]) ).
cnf(d60,plain,
( theorem(or(X3,or(X2,X1)))
| ~ theorem(or(X2,X0))
| ~ theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d29,d19]) ).
cnf(d61,plain,
( theorem(X1)
| ~ theorem(or(X1,X0))
| ~ theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d60,d59]) ).
cnf(d62,plain,
( ~ theorem(implies(implies(not(not(X1)),X1),X0))
| theorem(X0) ),
inference(resolution,[status(thm)],[d61,d51]) ).
cnf(d63,plain,
theorem(implies(implies(X0,not(not(X1))),implies(X0,X1))),
inference(resolution,[status(thm)],[d62,d35]) ).
cnf(d64,plain,
( ~ theorem(implies(X0,not(not(X1))))
| theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d63,c8]) ).
cnf(d65,plain,
theorem(implies(implies(X1,not(X0)),implies(X0,not(X1)))),
inference(superposition,[status(thm)],[c6,d39]) ).
cnf(d66,plain,
theorem(or(X0,implies(X1,not(not(X1))))),
inference(resolution,[status(thm)],[d40,d65]) ).
cnf(d67,plain,
( ~ theorem(implies(implies(X1,not(not(X1))),X0))
| theorem(X0) ),
inference(resolution,[status(thm)],[d61,d66]) ).
cnf(d68,plain,
theorem(implies(implies(X0,X1),implies(X0,not(not(X1))))),
inference(resolution,[status(thm)],[d67,d35]) ).
cnf(d69,plain,
( ~ theorem(implies(X0,X1))
| theorem(implies(X0,not(not(X1)))) ),
inference(resolution,[status(thm)],[d68,c8]) ).
cnf(d70,plain,
( theorem(implies(not(X1),not(X0)))
| ~ theorem(implies(X0,X1)) ),
inference(resolution,[status(thm)],[d69,d11]) ).
cnf(d71,plain,
( theorem(implies(not(X1),X0))
| ~ theorem(implies(not(X0),X1)) ),
inference(resolution,[status(thm)],[d70,d64]) ).
cnf(d72,plain,
theorem(implies(not(X0),implies(or(X0,X1),X1))),
inference(resolution,[status(thm)],[d71,d33]) ).
cnf(d73,plain,
theorem(implies(or(X0,X1),implies(not(X0),X1))),
inference(resolution,[status(thm)],[d72,d5]) ).
cnf(d74,plain,
$false,
inference(resolution,[status(thm)],[d73,c0]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : LCL208-3 : TPTP v9.3.1. Released v2.3.0.
% 0.00/0.04 % Command : casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.11/0.37 % Computer : n002.cluster.edu
% 0.11/0.37 % Model : x86_64 x86_64
% 0.11/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.37 % Memory : 8046.5625MB
% 0.11/0.37 % OS : Linux 6.8.0-71-generic
% 0.11/0.37 % CPULimit : 300
% 0.11/0.37 % WCLimit : 300
% 0.11/0.37 % DateTime : Fri Sep 25 22:03:50 UTC 2026
% 0.11/0.37 % CPUTime :
% 0.11/0.37 Running casc-portfolio.sh -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 184.48/46.64 % SZS status Unsatisfiable for theBenchmark.p
% 184.48/46.64 % SZS output start CNFRefutation for theBenchmark.p
% See solution above
%------------------------------------------------------------------------------