• C++ api changes: Building model takes BuilderOptions instead of extended list of Booleans, does not depend on settings anymore.
• storm-cli-utilities now contains cli related stuff, instead of storm-lib
• Symbolic (MT/BDD) bisimulation
• Fixed issue related to variable names that can not be used in Exprtk.
• DRN parser improved
• LP-based MDP model checking
• Sound (interval) value iteration
• Support for Multi-objective multi-dimensional reward bounded reachability properties for MDPs.
• RationalSearch method to solve equation systems exactly
• WalkerChae method for solving linear equation systems with guaranteed convergence
• Performance improvements for sparse model building
• Performance improvements for conditional properties on MDPs
• Automatically convert MA without probabilistic states into CTMC
• Fixed implemention of Fox and Glynn' algorithm
• storm-pars: support for welldefinedness constraints in mdps.
• storm-dft: split DFT settings into IO settings and fault tree settings
• storm-dft: removed obsolete explicit model builder for DFTs
• Features for developers:
  • Solvers can now expose requirements
  • unbounded reachability and reachability rewards now correctly respect solver requirements
  • Environment variables (such as the solver precisions) can now be handled more flexible
  • changes to Matrix-Vector operation interfaces, in particular fixed some issues with the use Intel TBB

• Support for long-run average rewards on MDPs and Markov automata using a value-iteration based approach.
• Storm can now check MDPs and Markov Automata (i.e. MinMax equation systems) via Linear Programming.
• Parametric model checking is now handled in a separated library/executable called storm-pars.
• Wellformedness constraints on PMCs:
  • include constraints from rewards
  • are in smtlib2
  • fixed
  • computation of only constraints without doing model checking is now supported
• Fix for nested formulae.
• JANI: Explicit engine supports custom model compositions.
• Support for parsing/building models given in the explicit input format of IMCA.
• Storm now overwrites files if asked to write files to a specific location.
• Changes in build process to accommodate for changes in carl. Also, more robust against issues with carl.
• USE_POPCNT removed in favor of FORCE_POPCNT. The popcnt instruction is used if available due to march=native, unless portable is set. Then, using FORCE_POPCNT enables the use of the SSE 4.2 instruction.

Several additions that did not make it into the v1.0.0 release:

• Multi-objective model checking support now fully included
• Several improvements in parameter lifting
• Several improvements in JANI parsing
• Properties can contain model variables
• Support for rational numbers/functions in decision diagrams via sylvan
• Elimination-based solvers (exact solution) for models stored as decision diagrams
• Export of version and configuration to cmake
• Improved building process

First stable release of Storm.