## TPTP Problem File: KLE167+1.p

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```%------------------------------------------------------------------------------
% File     : KLE167+1 : TPTP v7.5.0. Released v4.0.0.
% Domain   : Kleene Algebra (Demonic Refinement Algebra)
% Problem  : Blocking law
% Version  : [Hoe08] axioms.
% English  : If y is blocked by x then x before finite iteration of y reduces
%            to x.

% Refs     : [HS07]  Hoefner & Struth (2007), Automated Reasoning in Kleene
%          : [vW02]  von Wright (2002), From Kleene Algebra to Refinement A
%          : [Hoe08] Hoefner (2008), Email to G. Sutcliffe
% Source   : [Hoe08]
% Names    :

% Status   : Theorem
% Rating   : 0.33 v7.5.0, 0.41 v7.4.0, 0.20 v7.3.0, 0.34 v7.2.0, 0.38 v7.1.0, 0.30 v7.0.0, 0.27 v6.4.0, 0.31 v6.3.0, 0.33 v6.2.0, 0.36 v6.1.0, 0.40 v6.0.0, 0.43 v5.5.0, 0.48 v5.4.0, 0.54 v5.3.0, 0.59 v5.2.0, 0.50 v5.1.0, 0.52 v5.0.0, 0.50 v4.1.0, 0.48 v4.0.1, 0.39 v4.0.0
% Syntax   : Number of formulae    :   19 (  14 unit)
%            Number of atoms       :   25 (  16 equality)
%            Maximal formula depth :    5 (   3 average)
%            Number of connectives :    6 (   0   ~;   0   |;   1   &)
%                                         (   1 <=>;   4  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of predicates  :    2 (   0 propositional; 2-2 arity)
%            Number of functors    :    6 (   2 constant; 0-2 arity)
%            Number of variables   :   36 (   0 sgn;  36   !;   0   ?)
%            Maximal term depth    :    4 (   2 average)
% SPC      : FOF_THM_RFO_SEQ