%------------------------------------------------------------------------------
% File     : HWV052-1.002.002 : TPTP v8.2.0. Released v4.1.0.
% Domain   : Hardware Verification
% Problem  : Faulty channel 2 2
% Version  : Especial.
% English  : The problem of sending N bits over a faulty channel that can
%            mutilate any one bit. We can use K extra bits to help us do this.
%            Satisfiable means that it is possible, unsatisfiable means that
%            it is not possible.

% Refs     : [Cla10] Claessen (2010), Email to Geoff Sutcliffe
% Source   : [Cla10]
% Names    : fault_2_2 [Cla10]

% Status   : Unsatisfiable
% Rating   : 0.47 v8.2.0, 0.38 v8.1.0, 0.26 v7.5.0, 0.24 v7.3.0, 0.23 v7.2.0, 0.17 v7.1.0, 0.18 v7.0.0, 0.23 v6.4.0, 0.21 v6.3.0, 0.30 v6.2.0, 0.40 v6.1.0, 0.45 v6.0.0, 0.29 v5.5.0, 0.38 v5.4.0, 0.56 v5.3.0, 0.50 v5.1.0, 0.56 v5.0.0, 0.50 v4.1.0
% Syntax   : Number of clauses     :   12 (  11 unt;   1 nHn;   1 RR)
%            Number of literals    :   13 (  13 equ;   1 neg)
%            Maximal clause size   :    2 (   1 avg)
%            Maximal term depth    :    4 (   1 avg)
%            Number of predicates  :    1 (   0 usr;   0 prp; 2-2 aty)
%            Number of functors    :    7 (   7 usr;   2 con; 0-4 aty)
%            Number of variables   :   22 (   0 sgn)
% SPC      : CNF_UNS_RFO_PEQ_NUE

% Comments :
%------------------------------------------------------------------------------
cnf(bit_domain,axiom,
    ( X = o
    | X = i ) ).

cnf(bit_inverse,axiom,
    inv(X) != X ).

cnf(unpack1,axiom,
    unpack1(X1,X2,pack1(X1,X2),pack2(X1,X2)) = X1 ).

cnf(unpack1_01,axiom,
    unpack1(inv(X1),X2,pack1(X1,X2),pack2(X1,X2)) = X1 ).

cnf(unpack1_02,axiom,
    unpack1(X1,inv(X2),pack1(X1,X2),pack2(X1,X2)) = X1 ).

cnf(unpack1_03,axiom,
    unpack1(X1,X2,inv(pack1(X1,X2)),pack2(X1,X2)) = X1 ).

cnf(unpack1_04,axiom,
    unpack1(X1,X2,pack1(X1,X2),inv(pack2(X1,X2))) = X1 ).

cnf(unpack2,axiom,
    unpack2(X1,X2,pack1(X1,X2),pack2(X1,X2)) = X2 ).

cnf(unpack2_05,axiom,
    unpack2(inv(X1),X2,pack1(X1,X2),pack2(X1,X2)) = X2 ).

cnf(unpack2_06,axiom,
    unpack2(X1,inv(X2),pack1(X1,X2),pack2(X1,X2)) = X2 ).

cnf(unpack2_07,axiom,
    unpack2(X1,X2,inv(pack1(X1,X2)),pack2(X1,X2)) = X2 ).

cnf(unpack2_08,axiom,
    unpack2(X1,X2,pack1(X1,X2),inv(pack2(X1,X2))) = X2 ).

%------------------------------------------------------------------------------