From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,ec6f74e58e86b38b
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!nx01.iad01.newshosting.com!newshosting.com!novia!news-out.readnews.com!postnews3.readnews.com!not-for-mail
Message-Id: <4bffbd56$0$2376$4d3efbfe@news.sover.net>
From: "Peter C. Chapin" <pcc482719@gmail.com>
Subject: Re: SPARK and testing.
Newsgroups: comp.lang.ada
Date: Fri, 28 May 2010 08:59:38 -0400
References: <op.vda45rsfule2fv@garhos>
 <0466e131-cc80-4db4-b080-eec9aefcb1c7@z17g2000vbd.googlegroups.com>
 <op.vda7dlc2ule2fv@garhos> <4bfd2d05$0$27598$ba4acef3@reader.news.orange.fr>
 <siotu5lyiw08.u5c5kcrly3i2$.dlg@40tude.net> <op.vdbu2ksqxmjfy8@garhos>
 <1jo6gjejsy828$.e9dx6txqbazd$.dlg@40tude.net>
 <4bfd998c$0$2359$4d3efbfe@news.sover.net>
 <4bfebb3f$0$27571$ba4acef3@reader.news.orange.fr>
 <4bffaed5$0$2378$4d3efbfe@news.sover.net>
User-Agent: KNode/0.10.9
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7Bit
Organization: SoVerNet (sover.net)
NNTP-Posting-Host: 319f05c2.news.sover.net
X-Trace: 
 DXC=oPi8IPGL0Cc6:<VP2;n:ieK6_LM2JZB_cW?2c0[Uf7Do:WUUlR<856o;lfCPS2>Zib<I;02Ao3Wbl
X-Complaints-To: abuse@sover.net
Xref: g2news2.google.com comp.lang.ada:12122
Date: 2010-05-28T08:59:38-04:00
List-Id: <comp.lang.ada>

Peter C. Chapin wrote:

> 4. I might get lazy or run out of time and not complete all the proofs. 

I can elaborate on this a little more. In my case the program I'm working on
now needs to compute the minimum model of a collection of Datalog rules
(Datalog is a simple logic language that has been discussed as a possible
database query language). I don't know how to express such a complex, high
level characteristic as a SPARK '--#post' annotation.

What I need to say is that the information in an array Model_Area (an array of
tuples) is the minimum model implied by the Datalog rules in a different
array Storage_Area. It is well beyond my skills with SPARK to say such a
thing. I'm not saying that it is beyond SPARK's ability to express that
relationship, but for me it is just easier to explore the matter with a test
program.

Peter