clasp version 3.3.10

Changes

• Added support for (clingo) propagator undo mode
• Dropped incorrect ConstString optimization (cf. potassco/clingo#475)

Fixes

• Bug with --pre option (#88)
• Incorrect assertion (#90)
• Bug solving disjunctive program (#91)
• Confusing documentation of --opt-heuristic (#93)
• 32-bit archs should link to libatomic (#95)
• Infinite loop when optimizing (#96)
• Unexpected behaviour with incremental solving (#98)
• Deprecation warnings (cf. #94)
• Build error with VS 2022 17.8 (cf. #97)

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.10-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.9

Fixes

• #80
• #81
• #84
• #85

Other changes

• refined overflow checks in LogicProgram (#86)

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.9-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.8

Fixes

• #75
• #76
• potassco/clingcon#85
• potassco/clingo#355

Other changes

• updated catch2 (#73)
• moved clasp app to cli part of library

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.8-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.7

Fixes

• potassco/clingo#342
• potassco/clingcon#81
• #71
• #72

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.7-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.6

Changes

• Added support for single shot solving while keeping the logic program (#64)
• Added support for getting final conflict (#59)
• Added lower bounds to clingo statistics
• Added support for accessing trail from Potassco::Assignment (#49)
• CMake cleanup (#61, #62)

Fixes

• #48
• #51
• #52
• #54
• #55
• #57
• #65
• #65
• #69

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.6-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.5

Changes

• Added support for external (e.g. from clingo) heuristics.
  (#40)

Fixes

• #36
• #39
• #41
• #44
• #45
• Warnings from memcpy and switches
• Atoms of incremental programs not always marked as frozen.

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.5-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.4

Changes

• Added internal interface for user-defined statistics
  (#23)
• Extended ClingoPropagatorInit to support both global and per-solver watches.

Fixes

• #22
• #16
• #18
• #33
• #34
• Possible infinite loop in detection of problem type from input.
• Atoms of incremental programs not always marked as frozen.

Note

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.4-source.tar.gz for a complete source archive.

This release does not contain any clasp binaries. Prebuilt binaries of clasp are part of new
clingo releases.

clasp version 3.3.3

Fixes

• possible race condition in Windows alarm handling (libpotassco)
• state not fully reset in incremental acyc check
• facade progress state not reset after solving step
• Issues #11 #12 #13

Note on source code archives

The source code archives provided by github do not contain the libpotassco submodule. Please download
clasp-3.3.3-source.tar.gz for a complete source archive.

Note on binaries

This release does not contain any clasp binaries. Prebuilt binaries of clasp-3.3.3 can be found in
clingo version 5.2.2.

clasp version 3.3.2

Fixes

• missing lower bound output in unsat-core optimization for bounds < 0
• conflict clauses not always tagged with assumptions in unsat-core optimization
• invalid reallocation of vector during theory propagation
• Issue potassco/clingo#45
• Issue #10
• workaround for bug #81365 in gcc 7.1 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81365)
• support for <EOL> as terminator for minweight constraint in dimacs input

clasp version 3.3.0

New

• switched to MIT license
• added support for unsatisfiable core shrinking via option --opt-usc-shrink
• added support for core-guided optimization algorithms K and ONE
• removed dependency to Intel TBB (multithreading now only uses C++11 threads)

CLI changes:

• changed syntax of option --opt-strategy (old syntax is still supported but deprecated)
  • First argument selects the overall strategy, i.e. model- or core-guided optimization
  • Second argument selects the algorithm, e.g. K or OLL for core-guided optimization
  • Further arguments enable additional tactics, e.g. "disjoint" for disjoint core
    preprocessing in core-guided optimization
• option --pre now prints aspif by default (use --pre=smodels for smodels)
• merged option --opt-bound into --opt-mode
• merged option --counter-bump into --counter-restarts
• replaced option --opt-sat with --parse-maxsat
• merged option --dist-mode into --distribute
• merged option --del-protect into --update-lbd
• replaced numbers with named constants in various options
• added support for specifying bitmask arguments as list of named constants, e.g.
  --forget-on-step=varScores,signs,lemmaScores instead of --forget-on-step=7

Integration/clingo:

• switched to CMake for building clasp
• moved libprogram_opts to libpotassco, which is now a submodule of clasp
• added support for step-specific true var to simplify implementation of multishot propagators
• simplified ClaspFacade solving interface