diff --git a/prism/VERSIONS.txt b/prism/VERSIONS.txt index 1df09f32..14954a37 100644 --- a/prism/VERSIONS.txt +++ b/prism/VERSIONS.txt @@ -1,205 +1,414 @@ This file summarises the principal changes between each main public release of PRISM. + For more detailed information about the various changes, see the file CHANGELOG.txt. + + ----------------------------------------------------------------------------- + Version 3.3.1 (released 22/11/2009) + ----------------------------------------------------------------------------- + + * Minor bug fixes + + ----------------------------------------------------------------------------- + Version 3.3 (beta1 released 20/5/2009) + ----------------------------------------------------------------------------- + + * New language parser: + - improved efficiency, especially on large/complex models + - more accurate error reporting + * GUI model editor improvements: + - error highlighting + - line numbers + - undo/redo feature + * Expanded property specification language + - LTL (and PCTL*) now supported + - arbitrary expressions allowed, e.g. 1-P=?[...] + - support for weak until (W) and release (R) added + - steady-state operators (S=?[...], R=?[S]) allowed for DTMCs + - optional semicolons to terminate properties in properties files + * Modelling language changes: + - cleaner notation for functions, e.g. mod(i,n), not func(mod,i,n) + - function names can be renamed in module renaming + - language strictness: updates (x'=...) must be parenthesised + - ranges (x=1..3,5) no longer supported + - added conversion tool for old models (etc/scripts/prism3to4) + * New tool features: + - added symmetry reduction functionality + - steady-state/transient probability computation for DTMCs + - expanded cost/reward-property model checking support + - PRISM-to-html and PRISM-to-Latex conversion scripts + - efficiency improvements to precomputation algorithms + - BSCC export functionality (-exportbsccs switch) + - improvements to memory handling, especially in sparse/hybrid engines + + ----------------------------------------------------------------------------- + Version 3.2 (beta released 25/2/2008) + ----------------------------------------------------------------------------- + + * Support for 64-bit architectures and Mac OS X v10.5 (Leopard) + + * Improvements to property specification language + - addition of F and G operators (eventually/globally) + - can now use labels/formulas from model file in properties files + + * Redesign of the simulator GUI, plus new features: + - ability to display accumulated time/rewards + - new "Configure view" dialog + - easier selection of next step (double click) + + * New graph plotting engine using JFreeChart + + * Other GUI improvements: + - new icon set and graphics + - font increase/decrease feature + - loading of partially correct property files + + * Further additional functionality: + - extra reward model checking algorithms for some engines + - prototype SBML-to-PRISM translator + - new -exportrows switch for matrix exports + - new options for -simpath switch + - new -extraddinfo switch for displaying extra (MT)BDD info + + ----------------------------------------------------------------------------- + Version 3.1.1 (released 5/4/2007) + ----------------------------------------------------------------------------- -* Minor bug fixes + + +* Minor bug fixes + + + ----------------------------------------------------------------------------- + Version 3.1 (released 15/11/2006) + ----------------------------------------------------------------------------- + + * New installer for Windows binary + * Models can now have multiple (named) reward structures + * New -simpath switch for command-line generation of random paths with simulator + * Minor PRISM language improvements: + - type keyword does not need to be first thing in model file + - doubles in exponential form (1.4e-9) and unary minus (-1) allowed + * PRISM settings file now used by command-line version too + * Small GUI improvements + * New option to disable steady-state detection for CTMC transient analysis + * Bug fixes + + ----------------------------------------------------------------------------- + Version 3.0 (released 6/7/2006) + ----------------------------------------------------------------------------- + + * Discrete-event simulation engine added, providing: + - generation of approximate quantitative results via sampling + - debugging tool: manual model exploration and automatic trace generation + + * Support for costs and rewards: + - state-based and transition-based (impulse) costs/reward specification added to PRISM language + - verification (and simulation) of properties based on expected value of costs/rewards + (e.g. cumulated reward to reach state/time-bound, transient or steady-state reward value) + + * Overhaul of import/export functionality, including: + - export of transition matrix graph (Dot file) + - export of state/transition rewards + - export of property file labels and their satisfying states + - improved support for other export formats: Matlab, MRMC + - possibility to export to stdout/log instead of a file + - import of explicit model descriptions (from transition matrix and, optionally, state list) + + * GUI improvements, e.g.: + - additional graph plotting functionality + - XML-based import/export of graphs + - export of graphs to Matlab + + * Improved options management including saving of user settings + * Support for Mac OS X + * Easier compilation process + * Direct computation of transient probabilities + * Support for multiple initial states + * Improvements/additions to PRISM modelling/property languages + * Additional error checking on PRISM models + * Underlying data structure and efficiency improvements + * Bug fixes + + ----------------------------------------------------------------------------- + Version 2.1 (released 8/9/2004) + ----------------------------------------------------------------------------- + + * Now possible to build/run PRISM on Windows + * Compilation/installation procedures slightly simplified + * Splash screen on load + + ----------------------------------------------------------------------------- + Version 2.0 (released 17/3/2004) + ----------------------------------------------------------------------------- + + * 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) + ----------------------------------------------------------------------------- + + * Bug fixes in model construction code + + ----------------------------------------------------------------------------- + Version 1.3 (released 10/2/2003) + ----------------------------------------------------------------------------- + + * 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 +