<HTML>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- Created on December, 22 2009 by texi2html 1.64 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>
Send bugs and suggestions to <texi2html@mathematik.uni-kl.de>
-->
<HEAD>
<TITLE>APRON 0.9.10: APRON PPL standard options</TITLE>
<META NAME="description" CONTENT="APRON 0.9.10: APRON PPL standard options">
<META NAME="keywords" CONTENT="APRON 0.9.10: APRON PPL standard options">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<META NAME="Generator" CONTENT="texi2html 1.64">
</HEAD>
<BODY LANG="" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#800080" ALINK="#FF0000">
<A NAME="SEC68"></A>
<TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0>
<TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_31.html#SEC67"> < </A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_33.html#SEC69"> > </A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_25.html#SEC58"> << </A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_29.html#SEC65"> Up </A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_33.html#SEC69"> >> </A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron.html#SEC_Top">Top</A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_toc.html#SEC_Contents">Contents</A>]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[Index]</TD>
<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="apron_abt.html#SEC_About"> ? </A>]</TD>
</TR></TABLE>
<HR SIZE=1>
<H3> APRON PPL standard options </H3>
<!--docid::SEC68::-->
<P>
Currently, the only options available are related to the widening
operators.
</P><P>
<TABLE>
<TR><TD>Function </TD><TD> algo </TD><TD> Comments</TD>
</TR>
<TR><TD></TD>
</TR>
<TR><TD>widening</TD>
</TD><TD> <=0
</TD><TD> CH78 standard widening (Cousot & Halbwachs, POPL'1978).
</TR>
<TR><TD></TD>
</TD><TD> >0
</TD><TD> BHRZ03 widening (Bagnara, Hill, Ricci & Zafanella, SAS'2003)
</TR>
<TR><TD></TD>
</TR>
<TR><TD>widening_threshold</TD>
</TD><TD> <=0
</TD><TD> standard widening with threshold
</TR>
<TR><TD></TD>
</TD><TD> =1
</TD><TD> standard widening with threshold, intersected by the bounding box of the convex hull pof the two arguments
</TR>
<TR><TD></TD>
</TD><TD> <=0
</TD><TD> standard widening with threshold
</TR>
<TR><TD></TD>
</TD><TD> =1
</TD><TD> standard widening with threshold, intersected by the bounding box of the convex hull of the second argument. This is actually an extrapolation rather than a widening (termination is not guaranteed)
</TR>
<TR><TD></TD>
</TD><TD> =2
</TD><TD> BHRZ03 widening with threshold
</TR>
<TR><TD></TD>
</TD><TD> =3
</TD><TD> BHRZ03 widening with threshold, intersected by the bounding box of the convex hull of the second argument. This is actually an extrapolation rather than a widening (termination is not guaranteed)
</TR></TABLE>
<P>
<A NAME="pkgrid"></A>
<HR SIZE=1>
<BR>
<FONT SIZE="-1">
This document was generated
by <I>Bertrand Jeannet</I> on <I>December, 22 2009</I>
using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html
"><I>texi2html</I></A>
</BODY>
</HTML>
