Ciao Preprocessor (integrated Alpha version)
 | This is an alpha distribution, meant only for testing. Please do let us 
 | know at ciaopp-bugclip.dia.fi.upm.es any problems you may have.

{Reading /tmp/tmpIDq32I/len.pl
}
{loaded in 3432.214 msec.}
{preprocessed for plai in 0.0 msec.}
{analyzed by plai using det with local-control off in 4.0 msec.}
{written file /tmp/tmpIDq32I/len_det_co.pl}
:- module(_1,[len/2],[assertions]).

:- entry len(A,B)
         : ground(A).

:- true pred len(A,B)
         : ( native_props:mshare([[B]]), ground([A]), gnd(A), term(B) )
        => ( ground([A,B]), rt8(A), rt10(B) )
         + ( is_det, mut_exclusive ).

len([],X) :-
        !,
        eq(X,0).
len(Xs,s(N)) :-
        tail(Xs,Ys),
        len(Ys,N).

:- true pred tail(_1,Xs)
         : ( native_props:mshare([[Xs]]), var(Xs), ground([_1]), gnd(_1), term(Xs) )
        => ( ground([_1,Xs]), rt5(_1), gnd(Xs) )
         + ( is_det, mut_exclusive ).

tail([],[]).
tail([X|Xs],Xs).

:- true pred eq(X,0)
         : ( native_props:mshare([[X]]), term(X) )
        => ( ground([X]), rt0(X) )
         + ( is_det, mut_exclusive ).

eq(X,X).


:- regtype rt9/1.

rt9([]).
rt9(A) :-
        gnd(A).
rt9([A|B]) :-
        gnd(A),
        rt9(B).


:- regtype rt8/1.

rt8([]).
rt8([A|B]) :-
        gnd(A),
        rt9(B).


:- regtype rt11/1.

rt11(0).
rt11(s(A)) :-
        rt11(A).


:- regtype rt10/1.

rt10(0).
rt10(s(A)) :-
        rt11(A).


:- regtype rt5/1.

rt5([]).
rt5([A|B]) :-
        gnd(A),
        gnd(B).


:- regtype rt0/1.

rt0(0).