%------------------------------------------------------------------------------
% File : Twee---2.7
% Problem : SYN083-1 : TPTP v9.3.1. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : run_twee /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 : Tue Sep 29 01:47:03 PM UTC 2026
% Result : Unsatisfiable 0.08s 0.22s
% Output : CNFRefutation 0.08s
% Verified :
% SZS Type : Refutation
% Derivation depth : 3
% Number of leaves : 2
% Syntax : Number of clauses : 6 ( 6 unt; 0 nHn; 5 RR)
% Number of literals : 6 ( 5 equ; 1 neg)
% Maximal clause size : 1 ( 1 avg)
% Maximal term depth : 4 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 5 ( 5 usr; 4 con; 0-2 aty)
% Number of variables : 3 ( 0 sgn)
% Comments :
%------------------------------------------------------------------------------
cnf(c1,negated_conjecture,
f(a,f(b,f(c,d))) != f(f(f(a,b),c),d),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',prove_this) ).
cnf(c2,axiom,
f(X,f(Y,Z)) = f(f(X,Y),Z),
file('/export/starexec/sandbox2/benchmark/theBenchmark.p',f_is_associative) ).
cnf(c3,plain,
f(a,f(b,f(c,d))) = f(f(a,b),f(c,d)),
inference(substitution,[status(thm)],[c2]) ).
cnf(c4,plain,
f(f(a,b),f(c,d)) = f(f(f(a,b),c),d),
inference(substitution,[status(thm)],[c2]) ).
cnf(c5,plain,
f(a,f(b,f(c,d))) = f(f(f(a,b),c),d),
inference(transitivity,[status(thm)],[c3,c4]) ).
cnf(c6,plain,
$false,
inference(resolution,[status(thm)],[c1,c5]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : SYN083-1 : TPTP v9.3.1. Released v1.0.0.
% 0.00/0.04 % Command : run_twee /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.08/0.16 % Computer : n015.cluster.edu
% 0.08/0.16 % Model : x86_64 x86_64
% 0.08/0.16 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.08/0.16 % Memory : 8046.5625MB
% 0.08/0.16 % OS : Linux 6.8.0-71-generic
% 0.08/0.16 % CPULimit : 300
% 0.08/0.17 % WCLimit : 300
% 0.08/0.17 % DateTime : Mon Sep 28 15:36:01 UTC 2026
% 0.08/0.17 % CPUTime :
% 0.08/0.17 Running run_twee /export/starexec/sandbox2/benchmark/theBenchmark.p
% 0.08/0.22 Command-line arguments: --no-flatten-goal
% 0.08/0.22
% 0.08/0.22 % SZS status Unsatisfiable
% 0.08/0.22
% 0.08/0.22 % SZS output start CNFRefutation
% See solution above
% 0.08/0.23
% 0.08/0.23 RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------