4.10.7

4.10.7 - 11 Oct 2021

Major features:

• Simplify the way deltamonitors work. There is no need to freeze and unfreeze
  them before calling forEach... methods. But, a call to forEach... consumes all values stored.
• Fix a bug related to incremental propagators, views and missing events.
• STR2+ now deals with STAR tuples. Can be used when CT+ is not efficient (mainly due to very large domain size)
• Resetting cutoff strategies now possible
• Change restart behavior to reset cutoff on solutions (can be disabled though, calling solver.setRestarts(..) API).
• Display occurrences of variable types and occurrences of propagator types
• Now IntDomainBest offers API to break ties (see Search.ValH.BLAST for an example).
• Add solver.defaultSolution() which creates lazily a solution recording everything, plugs it and returns it.
  This is helpful when a Solution object is required in many places.
• Modification of the management of expressions in order to reduce the number of created variables (WIP).
• Add IntVar.stream() that streams a variable's values (in increasing order)
• Add Search.ValH.BMIN and Search.ValH.BLAST
• Add DIMACS CNF parser (org.chocosolver.parser.mps.ChocoDIMACS)
• Add Logger (solver.log()) to trace from Model/Solver.
• Change some default settings
• Revamp Settings, now is defined as a factory pattern + add Settings.dev() and Settings.prod() profiles.
• Make half reification possible. Seed c.implies(b) or c.impliedBy(b)
  where c is a Constraint and b a BoolVar.
• Update MiniZinc constraints definition + flatzinc files (for testing).
• Update choco.msc (for MiniZinc IDE) + ./minizinc/README.md
• Add Argmax and Argmin constraints
• Add IfThenElse as a decomposed constraint
• Improvement of solver.findParetoFront()

Deprecated API (to be removed in next release):

Other closed issues and pull requests:

See milestone 4.10.7

Contributors to this release:

• Dimitri Justeau-Allaire (@dimitri-justeau)
• Jean-Guillaume Fages (@jgFages)
• Charles Prud'homme (@cprudhom)
• Charles Vernerey (@ChaVer)

Full Changelog: 4.10.6...v4.10.7

4.10.6

4.10.6 - 11 Dec 2020

Major features:

• Add new resolution helper in Solver, namely findOptimalSolutionWithBounds. See Javadoc for details and usages.
• ParallelPortfolio now allows to add unreliable models, that is models whose resolution is deliberately made incomplete.
  These models should not stop the parallel resolution process when they no longer find a solution.
  Only complete models can inform the portfolio that they have proven the full exploration of the search space.
• Add org.chocosolver.util.tools.PreProcessing class, and a first preprocessing rule: equalities detection
• Upgrade ibex integration to support ibex-java v1.2.0.
  Fixes for issues #653 and #740.
• Add QuickXPlain algorithm to find the Minimum Conflicting Set (see issue #509)
• Update XCSP3 parser.
• Fix InDomainMedian when domain size is even
• Add new way to watch solving: solver.verboseSolving()
• Deal with annotations for some Flatzinc constraints (allDifferent and inverse)
• Add MultiArmedBandit strategy sequencer

Deprecated API (to be removed in next release):

Other closed issues and pull requests:

See milestone 4.10.6

Contributors to this release:

• Charles Prud'homme (@cprudhom)
• João Pedro Schmitt (@schmittjoaopedro)

Full Changelog: 4.10.5...v4.10.6

4.10.5

4.10.5 - 02 Oct 2020

Major features:

• add IN arithmetic int expression.

Deprecated API (to be removed in next release):

• Settings.enableACOnTernarySum() removed
• Settings.setEnableACOnTernarySum(boolean) removed

Other closed issues and pull requests:

See milestone 4.10.5

Contributors to this release:

• Guillaume Le Louët (@glelouet)
• Charles Prud'homme (@cprudhom)
• João Pedro Schmitt (@schmittjoaopedro)

Full Changelog: 4.10.4...v4.10.5

4.10.4

4.10.4 - 08 Sep 2020

Major features:

• Change search strategies in ParallelPortfolio
• Make "CT+" available to binary table constraint
• Update Dockerfile, now automatically released in hub.docker.com
• Migrate to ANTLR 4.8-1
• Support nested seq_search in FlatZinc file
• Add missing operations in model.unpost(c)
• Add new constraint, named conditional, that posts constraints on condition
• Merge cutoffseq in solver
• Merge pf4cs in parsers
• Remove geost from parsers

Deprecated API (to be removed in next release):

Other closed issues and pull requests:

#692, #698, #700, #702, #703, #704, #705

Contributors to this release

• Dimitri Justeau-Allaire (dimitri-justeau)
• João Pedro Schmitt (schmittjoaopedro)
• Charles Prud'homme (cprudhom)

4.10.3

Multi-modules and JPMS-ready.

Major features:

• Move cutoffseq, choco-sat, choco-solver, pf4cs, choco-parsers and samples projects into a (maven) multi-modules project
• JPMS-ready

Choco-solver can now be run with either JDK 8 or JDK 9+.

Additions

• Add Conflict History Search ("Conflict history based search for constraint satisfaction problem." Habetand Terrioux,SAC 19 (#676)
• Add dom/wdeg with refinement ("Refining Constraint Weighting." Wattez et al. ICTAI 2019.)
• Default AC algorithm for AllDifferent is now from IJCAI-18 "A Fast Algorithm for Generalized Arc Consistency of the Alldifferent Constraint", Zhang et al. (#644)
• Add a pure java alternative to Ibex (#666)
• LNS can now be defined with a solution as bootstrap.
• Add simplify API for current Solver operations (#659)
• Simplify code for the nValues constraint (using a watching/witnessing reasoning) (#674)
• Replace former Bin Packing propagators by Paul Shaw propagator (#671)
• Improving PropDiffN performance (#663)
• Add nogood stealing for ParallelPortfolio (#669)
• Adding of new constructors for Task objects (#662)

Removals

• Remove JSON writer/parser (which was actually partially supported and not maintained) (#664)

Deprecated API (to be removed in next release):

• Task(IntVar s, IntVar d, IntVar e, boolean declareMonitor)
• AbstractProblem.readArgs(String... args)

Other closed issues and pull requests:

#617, #633, #637, #639, #645, #646, #647, #648, #658, #665, #667, #678, #682, #686, #689, #691

4.10.2

Major features:

• fix issues relative to propagation
• change constraints' status checking
• change stop conditions in ExplanationForSignedClause
• add stable module name

Closed issues and pull requests:

#618

4.10.1

Major features:

• LNS on other variables (e.g. SetVarLNS)
• Continuous integration fixed
• IntDomainMiddle now allows an external definition of what middle is, thanks to ToDoubleFunction<IntVar>
• Add specific propagators for modulo
• Add views of differences between solutions (see solver.printDistance(...) and solver.printDifferenceMatrix(...))

Deprecated API (to be removed in next release):

Closed issues and pull requests:

#538, #600, #611, #612, #613, #614, #615, #617, #619, #627, #630

4.10.0

This release comes with several major modifications.
The most important one is related to explanations.
The previous framework is replaced by a new one based on "A Proof-Producing CSP Solver", M.Vesler and O.Strichman, AAI'10.

See notebooks for an example of use.

Major features:

• Update statistic dashboard (see solver.showDashboard())
• Fix Settings.load on missing property
• Fix issue in Cumulative simplified API
• Add additional views model.intEqView(x,c), model.intNeView(x,c), model.intLeView(x,c) and model.intGeView(x,c)
• Detect when the same views is created twice on the same pair <variable, value?>
• Revamp the way LNS' neighbor is declared (simplication)
• Add AbstractStrategy.remove() method to remove a declared strategy and its dependencies
• Add new strategies to Search
• Add new decomposition to IDecompositionFactory
• Improve initialization of CT+ and CT*
• Improve IntVar#isInstantiatedTo(int)

Deprecated API (to be removed in next release):

• INeighbor interface is deprecated and replaced by Neighbor abstract class
• INeighborFactory#explanationBased(IntVar...) is deprecated, no replacement.
• ILearnFactory#setCBJLearning(boolean,boolean) and ILearnFactory#setDBTLearning(boolean,boolean) are deprecated, see ILearnFactory#setLearningSignedClauses() instead

Closed issues and pull requests:

#604, #605, #606

4.0.9

Minor release

Major features:

• Offer possibility to store and load Settings from a property file.
• Add API for cumulative when only starts are variable
• Add decomposition of cumulative: model.cumulativeTimeDecomp(...)
• Logical expression XOR manages more than 2 variables
• Add new API to IOutputFactory (to Gephi and to Graphviz)
• Add constraint network output (to gexf format), see solver.constraintNetworkToGephi(file)
• add ParallelPortfolio.streamSolutions (#579)

Deprecated API (to be removed in next release):

Closed issues and pull requests:

#596, #600, #601, #602

4.0.8

Update DefaultSettings with right version