You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
4.2 KiB
92 lines
4.2 KiB
-----------------------------------------------------------------------------
|
|
Version 2.1 (released 8/9/2004)
|
|
-----------------------------------------------------------------------------
|
|
|
|
Changes:
|
|
|
|
* Now possible to build/run PRISM on Windows
|
|
* Compilation/installation procedures slightly simplified
|
|
* Splash screen on load
|
|
|
|
|
|
-----------------------------------------------------------------------------
|
|
Version 2.0 (released 17/3/2004)
|
|
-----------------------------------------------------------------------------
|
|
|
|
Changes:
|
|
|
|
* Completely new graphical user interface, including:
|
|
- Text editor for PRISM language
|
|
- Automated results collection/graph plotting
|
|
|
|
* Enhancements to PRISM language:
|
|
- Types (ints, doubles and booleans) and type checking added
|
|
- Probabilities/rates can now be expressions
|
|
- Variable ranges/initial values can now be expressions
|
|
- Constant/formula definitions can be expressions (including in terms of each other)
|
|
- Process algebra style definitions allowed for MDPs too (via "system" construct)
|
|
|
|
* Enhancements to property specifications:
|
|
- Probability/time bounds in PCTL/CSL properties can now be expressions
|
|
- Use of constants now permitted: both those from the model and newly declared ones
|
|
- Added "init" keyword to PCTL/CSL (atomic proposition true only in initial state)
|
|
- Can define and reuse "labels" (atomic propositions) (like formulas in model files)
|
|
- Can write properties of the form "P=?[...]" which return the actual probability
|
|
|
|
* Additional features:
|
|
- Automatic handling of multiple model checking computations,
|
|
e.g. check "P~p[true U<=k error]" for k=1..100
|
|
- Added -exportstates switch, exports reachable states to text file
|
|
- Added -nobscc switch for optional bypass of BSCC computation
|
|
- Added explicit versions of export options (including first export option for MDPs)
|
|
- Export options can now be used in conjunction with each other and with model checking
|
|
- Added -version switch to display version
|
|
|
|
* Efficiency improvements
|
|
- Improved heuristics for hybrid engine (sb/sbmax/gsl switches -> sbmax/sbl/gsmax/gsl)
|
|
- More efficient construction process for unstructured models
|
|
- General restructuring/improvements to model construction process implementation
|
|
|
|
* Miscellaneous
|
|
- Various bug fixes
|
|
- Fairness (for MDP model checking) now OFF by default (used to be ON)
|
|
|
|
|
|
-----------------------------------------------------------------------------
|
|
Version 1.3.1 (released 20/2/2003)
|
|
-----------------------------------------------------------------------------
|
|
|
|
Changes:
|
|
|
|
* Bug fixes in model construction code
|
|
|
|
|
|
-----------------------------------------------------------------------------
|
|
Version 1.3 (released 10/2/2003)
|
|
-----------------------------------------------------------------------------
|
|
|
|
Changes:
|
|
|
|
* Steady-state probability computation improved to include strongly connected component (SCC) computation
|
|
* Extended support for CSL time-bounded until operator to include arbitrary intervals
|
|
* More flexible parallel composition options in the PRISM language (for DTMCs and CTMCs)
|
|
* Added option to import PEPA process algebra descriptions as models
|
|
* Improved range of numerical methods: (Backwards) Gauss-Seidel and (Backwards) SOR (plus variants for hybrid engine)
|
|
* Added -pctl/-csl switches to allow command line specification of properties
|
|
* Improved handling of deadlock states: can add self-loops to these states automatically (e.g. -fixdl switch)
|
|
* Steady-state probabilities are no longer automatically computed for CTMCs: use the -ss switch
|
|
* Addition of {} operator to PCTL/CSL formulas to support printing of probabilities
|
|
* Resolved problem with PRISM language syntax: updates must now be parenthesised
|
|
* Default value for maximum number of iterations reduced from 500,000 to (more sensible) 10,000
|
|
* Added switches to control CUDD behaviour (-cuddmaxmem, -cuddepsilon)
|
|
* Additional example files
|
|
* Numerous bug fixlatest.htmles
|
|
* Now released under the GPL license
|
|
|
|
|
|
-----------------------------------------------------------------------------
|
|
Version 1.2 (released 17/9/2001)
|
|
-----------------------------------------------------------------------------
|
|
|
|
First public release
|
|
|