v0.7.0

Announcements

This version is compatible with Julia v1.2.

Breaking changes

• Changed option :lazy_A⌜R⋂G⌟ from Bool to String (#621)
• Fixed upper bounds for dependencies (#744)

Features

Bug fixes

• Fix ABS07_decomposed operator with inputs (#737)
• Overapproximate singular maps in LazyDiscretePost (#621)
• Forbid old, non-functional Symbol input for option :block_options (#744)

Enhancements

• Fix typo in error messages (#729)
• Improved discretization of interval-matrix affine systems (#732)
• Restore compatibility with MathematicalSystems (#733)
• Use zonotope decomposition in ASB07_decomposed (#736)
• Restore compatibility with IntervalMatrices (#742)
• Fixed compatibility with LazySets (#744)

Other

• Fixed doctests (#744)

v0.6.1

Bug fixes

• Fix bug for N == 1 in BFFPSV18

Enhancements

• Generalize discretization for GLGM06 (#713)

v0.6.0

Announcements

This version is compatible with Julia v1.2.

Breaking changes

• Added Flowpipe type (#719); this changed the internal interface for algorithms and the result type ReachSolution

Bug fixes

• Fixed property checking with BFFPSV18 algorithm when N == 1 and using multiple blocks (#721)

Enhancements

• Restored compatibility with new version of LazySets (#725)

v0.5.0

To use this branch, do git checkout v0.5.0.

Bug fixes

• Fixed error with undefined projection_matrix variable in projection (#717)

v0.4.0

Announcements

This version is compatible with Julia v1.2.

Breaking changes

• decomposing algorithms now return a SparseReachSet instead of a ReachSet (#676)
• revised projection (#676)
• continuous-post operator TMJets now returns a flowpipe with concrete set types to account for a change in LazySets (#695)

Features

• discretize using matrix interval remainder (#659)
• reachability algorithm for LTI systems with interval matrices using zonotopes (#681) and a decomposed version thereof (#688)
• coordinate transformations are now properly reversed (#689)

Bug fixes

• added a missing import of SparseArrays in Utils module (#674)
• fixed Schur transformation (#689)

Enhancements

• improved ConcreteDiscretePost operator (#650)
• added AbstractReachSet as new supertype of reach-set wrappers (#676)
• properties are now checked after taking the intersection with the invariant (#692)

Other

• use TaylorIntegration v0.6.0 (#682)
• removed broken @relpath macro (#697)

v0.3.0

Breaking changes

• Removed symbol arguments for the overapproximation option with template directions (e.g., :box) (#633)

Features

• Accept AffineContinuousSystem (resp. AffineDiscreteSystem) in the continuous post (#625)
• Added a decomposed hybrid algorithm (#641, #660)

Bug fixes

• Fixed a case where the :overapproximation option was ignored by the LazyDiscretePost operator (#633)
• Fixed operator norm usage in discretization (#644)
• Fixed a namespace conflict with function update! (#667)

Enhancements

• Allow using template directions for overapproximation in the discrete post operator (#627)
• Dropped the Compat dependency (#666)

Other

• Ported validated_integ from TaylorModels to Reachability (#614)
• Return taylor model in validated_integ of TMJets (#634)
• Added Project file (#642)

v0.2.0

Announcements

This release dropped compatibility with pre-v1.0 versions of Julia (#431).

This release is used for ARCH2019_RE.

Features

• added (rudimentary) support to check properties for hybrid systems (#480, #500)
• added a new option to discretize using concrete operations on zonotopes (#528)
• Inf as time horizon is now supported (#549)
• added clustering option :none_oa which does not cluster but still overapproximates (#555)
• accept affine continuous systems without inputs (#560)
• added new continuous-post algorithm: GLGM06 (#531)
• added new continuous-post algorithm: TMJets (#537)

Bug fixes

• fixed behavior of LazyDiscretePost's option :lazy_R⋂G and added option :lazy_A⌜R⋂G⌟ for the old behavior (#459)
• fixed bloating for systems without inputs in the approximation model that uses interpolation (former assume_homogeneous option) (#503)
• BFFPSV18 (continuous-post operator) now returns the input options (instead of an internal representation) (#539)
• fixed crash in error message (#546)
• do not automatically project if :projection_matrix option is given (#547)

Enhancements

• allow to disable the max_jumps option and disable it by default (#456)
• allow using a U::LazySet for the input set of systems; it is equivalent to ConstantInput(U) (#526)
• allow to use x' = Ax + Bu, with or without constraints, which is transformed to the canonical form internally, with the normalize function (#542)
• initial states in hybrid-system analysis are now preserved if are fully inside the invariant (#573)

Other

• refactoring work (#430, #432)
• new page in the documentation about works citing JuliaReach related packages (#428), and another one with publications of repeatability evaluations or algorithms (#426)
• We now use the AbstractMap interface from MathematicalSystems for transitions (guards/assignmens) of hybrid automaton models (#439, #458)
• The options interface has changed. In particular, options specific to the continuous-post algorithm now need to be passed to the respective post operator, and the default values for some options has changed. (#464)
• The Properties module has become a standalone module. We renamed the property types and a method (check_property → check). Conjunction/Disjunction types have been added. LinearConstraintProperty has been removed as it can be imitated by a combination of the other property types. (#493, #494, #497)
• The options for the BFFPSV algorithm have changed. For overapproximation during decomposition and iteration, we now use a unified option :block_options. This synchronizes the code with recent corresponding changes in LazySets. (#505)
• Overhaul discretize.jl (#503)
• inout_map now uses the concrete projection of half-spaces and hpolyhedron from LazySets for property checking (#525)
• decomposition for one-block partitions is now only skipped if the option :block_options_init is set to LinearMap in addition (#534)
• the invariant argument is removed from the continuous post; instead it is read from the stateset of the dynamical system in each mode (#551)
• better error message if unsupported value for option :overapproximation is given (#561)

Breaking changes

• ContinuousSystem and DiscreteSystem constructors are removed; use constructors from MathematicalSystems types instead (#503)
• see the section Other above for more refactoring-related changes

v0.1.0

This release is fully compatible with Julia v0.6 and also with Julia v0.7/v1.0.