Import of lbtt 1.1.0

lbtt/NEWS

@@ -1,4 +1,4 @@
-lbtt NEWS -- history of user-visible changes.   13 Feb 2004
+lbtt NEWS -- history of user-visible changes.   7 Jul 2004
 Copyright (C) 2004 Heikki Tauriainen
 
    Permission is granted to anyone to make or distribute verbatim copies
@@ -12,6 +12,136 @@ Copyright (C) 2004 Heikki Tauriainen
 
 Please send bug reports to <heikki.tauriainen@hut.fi>.
 
+Version 1.1.0
+
+* File formats
+
+    - The file format for automata description files has changed to
+      accommodate automata with acceptance conditions on both states
+      and transitions.  The old format for automata remains supported
+      with the restriction that each guard formula of a transition
+      should be followed by a newline (with optional preceding white
+      space).
+
+    - In addition to the prefix format for LTL formulas, the input
+      files used with the `--formulafile' command line option may now
+      contain formulas in a variety of other formats, such as in the
+      infix format used by lbtt for log messages, together with formats
+      used by some LTL-to-Büchi translator implementations (Spin,
+      LTL2BA, LTL2AUT, Temporal Massage Parlor, Wring, Spot, LBT).
+      These formats can also be used for guard formulas in automaton
+      description files (however, lbtt still uses the prefix format in
+      the input files for the translators).
+
+  Thanks to Alexandre Duret-Lutz for useful suggestions for
+  enhancements.
+
+* Support for symbolic names of implementations
+
+    - Beside the numeric identifiers of implementations, lbtt now
+      accepts also the symbolic names of implementations (as defined in
+      a configuration file) as parameters for command line options and
+      internal commands.  Consequently, the names of implementations
+      defined in the configuration file have to be unique.
+
+    - The name `lbtt' is now reserved for lbtt's internal model checking
+      algorithm and cannot be used as a name for an implementation in
+      the configuration file.
+
+* User commands
+
+   - For consistency, numeric intervals in state or implementation
+     identifier lists can now be specified using either - or ... as a
+     separator between the bounds of the interval.
+
+   - The user command `formula' now accepts an additional parameter
+     (`normal' or `nnf') for choosing whether to display a formula in
+     the form in which it was generated or in negation normal form.
+
+   - The internal model checking algorithm is now referred to with the
+     keyword "lbtt" instead of "p" as was the case with previous
+     versions of lbtt.  The internal model checking algorithm can now be
+     enabled or disabled similarly to the external translators.
+
+   - The `consistencyanalysis' and `buchianalysis' commands now show
+     more information about the accepting runs of Büchi automata to
+     help examining the runs.  (Because of this change, the runs and
+     witnesses may be longer than in previous versions of lbtt.)
+
+   - The `implementations' and `translators' commands are now recognized
+     as synonyms of the `algorithms' command.
+
+* Configuration files
+
+   - Quotes are no longer required for enclosing string values
+     containing no white space.
+
+   - Numeric intervals in formula or state space sizes can now be
+     specified using either - or ... as a separator between the bounds
+     of the interval.
+
+   - The keywords "Implementation" and "Translator" are now recognized
+     as synonyms of the "Algorithm" block identifier.
+
+* User interrupts
+
+  Keyboard interrupt handling is now enabled only at explicit request
+  (if not enabled, lbtt simply aborts on keyboard interrupts).  The
+  interrupt handler is enabled by combining the keyword `onbreak' with
+  any of the three standard interactivity modes (`always', `never', or
+  `onerror') in the arguments for the `GlobalOptions.Interactive'
+  configuration file option or the `--interactive' command line option.
+  For example, use the command line option
+  `--interactive=onerror,onbreak' to pause testing in case of an error
+  or on a user interrupt.
+
+* Command line options
+
+   - The `--pause' command line option now works identically to the
+     `--interactive' option.
+
+   - The command-line options `--nopause' and `--pauseonerror' are no
+     longer supported.  Use the `--interactive' or the `--pause'
+     option instead with an optional argument of a comma-separated list
+     of interactivity modes (`always', `never', `onerror', `onbreak').
+
+* Timeouts
+
+  lbtt now supports specifying a time (in wall-clock time) after
+  which the execution of a translator is aborted if it has not yet
+  produced a result.  The timeout can be set using either the new
+  configuration file option `GlobalOptions.TranslatorTimeout' or the
+  equivalent command line option `--translatortimeout'.  Both options
+  require a parameter of the form [hours]h[minutes]min[seconds]s; for
+  example, use the command line option `--translatortimeout=1h30min'
+  to set the timeout at one hour and thirty minutes.
+
+* Reporting
+
+   - lbtt now reports test statistics also in verbosity modes 1 and 2.
+     The output of the user command `results' also reflects the active
+     verbosity mode more accurately.
+
+   - lbtt now exits with status 0 only if no test failures were
+     detected; otherwise the exit status is either 1 (at least
+     one failure occurred), 2 (error in program configuration or
+     command line parameters) or 3 (lbtt exited due to an internal
+     error).
+
+* Internal changes
+
+  Due to the changes in the supported file formats, this version
+  includes a rewrite of the product computation and emptiness checking
+  algorithms.  As this is a major internal change, any information about
+  unexpected changes in the stability (*) of the tool is welcomed at the
+  e-mail address given above.
+
+  (*) Unfortunately, the above changes in the source code are known to
+  cause build problems with GCC 2.95.  Therefore, this compiler is no
+  longer officially supported for building the tool.
+
+---------------------------------------------------------------------------
+
 Version 1.0.3
 
 * This release fixes several compilation issues with GNU libc 2.3.2