File: README

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This directory is based on the dissertation work completed by Hanbing
Liu at the University of Texas at Austin.  It is based on the src/
subdirectory created by executing the following command:

git clone https://github.com/haliu/M6

Specifically, Matt Kaufmann executed that command on 10/1/2024, which
came with the following log.

~/temp/hbl/M6$ git log
commit bc8eb609089abcee054704530c8f84fde70aae8e (HEAD -> master, origin/master, origin/HEAD)
Author: haliu <hanbing.liu@gmail.com>
Date:   Sat Oct 10 13:28:53 2015 -0500

    Initial import Hanbing's dissertation work under git
~/temp/hbl/M6$ 

Files *.lisp.html were then deleted here.

The README file from that distribution is file README-M6 in the
directory of this README (except for the first line of README-M6,
which was added by Matt).

Hanbing points out the following.

- The "small" subdirectory contains a self-contained proof that a byte
  verified program will never overflow the operand stack in a "small"
  JVM like machine.

- Then "main" directory contains an incomplete proof (i.e. with
  skip-proofs) that bytecode verified program when executed on a JVM
  will match the execution on a "defensive JVM".

Matt made a number of tweaks in order to get the books to certify with
the current ACL2.  Other than deleting stray right parentheses, these
are all labeled with "Matt K.".

See file LICENSE for copyright and license information.