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Parallel solving (#7821)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

* Add support for Algebraic Datatypes in JavaScript/TypeScript bindings (#7734)

* Initial plan

* Add datatype type definitions to types.ts (work in progress)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype type definitions with working TypeScript compilation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Implement core datatype functionality with TypeScript compilation success

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype implementation with full Context integration and tests

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* chipping away at the new code structure

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

* merge

* fix #7603: race condition in Ctrl-C handling (#7755)

* fix #7603: race condition in Ctrl-C handling

* fix race in cancel_eh

* fix build

* add arithemtic saturation

* add an option to register callback on quantifier instantiation

Suppose a user propagator encodes axioms using quantifiers and uses E-matching for instantiation. If it wants to implement a custom priority scheme or drop some instances based on internal checks it can register a callback with quantifier instantiation

* missing new closure

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add Z3_solver_propagate_on_binding to ml callback declarations

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add python file

Signed-off-by: Lev Nachmanson <levnach@Levs-MacBook-Pro.local>

* debug under defined calls

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* more untangle params

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* precalc parameters to define the eval order

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* remove a printout

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* rename a Python file

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* add on_binding callbacks across APIs

update release notes,
add to Java, .Net, C++

* use jboolean in Native interface

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* register on_binding attribute

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix java build for java bindings

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* avoid interferring side-effects in function calls

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove theory_str and classes that are only used by it

* remove automata from python build

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove ref to theory_str

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* get the finest factorizations before project

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* rename add_lcs to add_lc

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* resolve bad bug about l2g and g2l translators using wrong global context. add some debug prints

* initial attempt at dynamically switching from greedy to frugal splitting strategy in return_cubes. need to test. also there is some bug where the threads take forever to cancel?

* Update RELEASE_NOTES.md

* resolve bug about not translating managers correctly for the second phase of the greedy cubing, and the frugal fallback

* remove unused square-free check

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* add some debug prints and impelement internal polynomial fix

* restore the square-free check

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* add some comments and debug m_assumptions_used

* redo greedy->frugal strategy so we don't split on existing cubes in frugal at all (eliminate the incorrect/wasteful step by processing current batch first)

* set up initial scaffolding for sharing clauses between threads and batch manager. needs some reworking/debug still

* Add .github/copilot-instructions.md with comprehensive Z3 development guide (#7766)

* Initial plan

* Add comprehensive .github/copilot-instructions.md with validated build commands and timing

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Remove test_example binary file from repository

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Bump actions/checkout from 4 to 5 (#7773)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* turn off logging at level 0 for testing

* add max thread conflicts backoff

* Parallel solving (#7775)

* very basic setup

* very basic setup (#7741)

* add score access and reset

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* added notes

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* add bash files for test runs

* fix compilation

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* more notes

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* Update PARALLEL_PROJECT_NOTES.md

* add top-k fixed-sized min-heap priority queue for top scoring literals

* fixed-size min-heap for tracking top-k literals (#7752)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: humnrdble <83878671+humnrdble@users.noreply.github.com>

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* debugging

* process cubes as lists of individual lits

* Parallel solving (#7756)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* process cubes as lists of individual lits

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: humnrdble <83878671+humnrdble@users.noreply.github.com>

* snapshot

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* pair programming

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* pair programming

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* merge

* chipping away at the new code structure

* Parallel solving (#7758)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

* Add support for Algebraic Datatypes in JavaScript/TypeScript bindings (#7734)

* Initial plan

* Add datatype type definitions to types.ts (work in progress)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype type definitions with working TypeScript compilation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Implement core datatype functionality with TypeScript compilation success

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype implementation with full Context integration and tests

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* chipping away at the new code structure

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: humnrdble <83878671+humnrdble@users.noreply.github.com>
Co-authored-by: Nuno Lopes <nuno.lopes@tecnico.ulisboa.pt>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* updates

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

* Parallel solving (#7759)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

* Add support for Algebraic Datatypes in JavaScript/TypeScript bindings (#7734)

* Initial plan

* Add datatype type definitions to types.ts (work in progress)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype type definitions with working TypeScript compilation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Implement core datatype functionality with TypeScript compilation success

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype implementation with full Context integration and tests

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* chipping away at the new code structure

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: humnrdble <83878671+humnrdble@users.noreply.github.com>
Co-authored-by: Nuno Lopes <nuno.lopes@tecnico.ulisboa.pt>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* updates

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* simplify output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* merge

* resolve bad bug about l2g and g2l translators using wrong global context. add some debug prints

* initial attempt at dynamically switching from greedy to frugal splitting strategy in return_cubes. need to test. also there is some bug where the threads take forever to cancel?

* Parallel solving (#7769)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

* Add support for Algebraic Datatypes in JavaScript/TypeScript bindings (#7734)

* Initial plan

* Add datatype type definitions to types.ts (work in progress)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype type definitions with working TypeScript compilation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Implement core datatype functionality with TypeScript compilation success

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype implementation with full Context integration and tests

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* chipping away at the new code structure

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

* merge

* resolve bad bug about l2g and g2l translators using wrong global context. add some debug prints

* initial attempt at dynamically switching from greedy to frugal splitting strategy in return_cubes. need to test. also there is some bug where the threads take forever to cancel?

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Co-authored-by: humnrdble <83878671+humnrdble@users.noreply.github.com>
Co-authored-by: Nuno Lopes <nuno.lopes@tecnico.ulisboa.pt>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* resolve bug about not translating managers correctly for the second phase of the greedy cubing, and the frugal fallback

* Parallel solving (#7771)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

* Add support for Algebraic Datatypes in JavaScript/TypeScript bindings (#7734)

* Initial plan

* Add datatype type definitions to types.ts (work in progress)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete datatype type definitions with working TypeScript compilation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Implement core datatype functionality with TypeScript compilation success

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

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* chipping away at the new code structure

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

* merge

* fix #7603: race condition in Ctrl-C handling (#7755)

* fix #7603: race condition in Ctrl-C handling

* fix race in cancel_eh

* fix build

* add arithemtic saturation

* add an option to register callback on quantifier instantiation

Suppose a user propagator encodes axioms using quantifiers and uses E-matching for instantiation. If it wants to implement a custom priority scheme or drop some instances based on internal checks it can register a callback with quantifier instantiation

* missing new closure

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add Z3_solver_propagate_on_binding to ml callback declarations

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add python file

Signed-off-by: Lev Nachmanson <levnach@Levs-MacBook-Pro.local>

* debug under defined calls

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* more untangle params

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* precalc parameters to define the eval order

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* remove a printout

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* rename a Python file

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update release notes,
add to Java, .Net, C++

* use jboolean in Native interface

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* register on_binding attribute

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

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* avoid interferring side-effects in function calls

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* remove ref to theory_str

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* rename add_lcs to add_lc

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* resolve bad bug about l2g and g2l translators using wrong global context. add some debug prints

* initial attempt at dynamically switching from greedy to frugal splitting strategy in return_cubes. need to test. also there is some bug where the threads take forever to cancel?

* Update RELEASE_NOTES.md

* resolve bug about not translating managers correctly for the second phase of the greedy cubing, and the frugal fallback

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Signed-off-by: Lev Nachmanson <levnach@Levs-MacBook-Pro.local>
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* code and notes

* add some debug prints and impelement internal polynomial fix

* add some comments and debug m_assumptions_used

* redo greedy->frugal strategy so we don't split on existing cubes in frugal at all (eliminate the incorrect/wasteful step by processing current batch first)

* set up initial scaffolding for sharing clauses between threads and batch manager. needs some reworking/debug still

* Parallel solving (#7774)

* very basic setup

* ensure solve_eqs is fully disabled when smt.solve_eqs=false, #7743

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* respect smt configuration parameter in elim_unconstrained simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* indentation

* add bash files for test runs

* add option to selectively disable variable solving for only ground expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove verbose output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7745

axioms for len(substr(...)) escaped due to nested rewriting

* ensure atomic constraints are processed by arithmetic solver

* #7739 optimization

add simplification rule for at(x, offset) = ""

Introducing j just postpones some rewrites that prevent useful simplifications. Z3 already uses common sub-expressions.
The example highlights some opportunities for simplification, noteworthy at(..) = "".
The example is solved in both versions after adding this simplification.

* fix unsound len(substr) axiom

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* FreshConst is_sort (#7748)

* #7750

add pre-processing simplification

* Add parameter validation for selected API functions

* updates to ac-plugin

fix incrementality bugs by allowing destructive updates during saturation at the cost of redoing saturation after a pop.

* enable passive, add check for bloom up-to-date

* add top-k fixed-sized min-heap priority queue for top scoring literals

* set up worker thread batch manager for multithreaded batch cubes paradigm, need to debug as I am getting segfault still

* fix bug in parallel solving batch setup

* fix bug

* allow for internalize implies

* disable pre-processing during cubing

* debugging

* remove default constructor

* remove a bunch of string copies

* Update euf_ac_plugin.cpp

include reduction rules in forward simplification

* Update euf_completion.cpp

try out restricting scope of equalities added by instantation

* Update smt_parallel.cpp

Drop non-relevant units from shared structures.

* process cubes as lists of individual lits

* merge

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* Initial plan

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* chipping away at the new code structure

* comments

* debug infinite recursion and split cubes on existing split atoms that aren't in the cube

* share lemmas, learn from unsat core, try to debug a couple of things, there was a subtle bug that i have a hard time repro'ing

* merge

* fix #7603: race condition in Ctrl-C handling (#7755)

* fix #7603: race condition in Ctrl-C handling

* fix race in cancel_eh

* fix build

* add arithemtic saturation

* add an option to register callback on quantifier instantiation

Suppose a user propagator encodes axioms using quantifiers and uses E-matching for instantiation. If it wants to implement a custom priority scheme or drop some instances based on internal checks it can register a callback with quantifier instantiation

* missing new closure

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add Z3_solver_propagate_on_binding to ml callback declarations

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add python file

Signed-off-by: Lev Nachmanson <levnach@Levs-MacBook-Pro.local>

* debug under defined calls

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* more untangle params

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* precalc parameters to define the eval order

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* remove a printout

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* rename a Python file

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* add on_binding callbacks across APIs

update release notes,
add to Java, .Net, C++

* use jboolean in Native interface

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* register on_binding attribute

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix java build for java bindings

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* avoid interferring side-effects in function calls

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove theory_str and classes that are only used by it

* remove automata from python build

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove ref to theory_str

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* get the finest factorizations before project

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* rename add_lcs to add_lc

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* resolve bad bug about l2g and g2l translators using wrong global context. add some debug prints

* initial attempt at dynamically switching from greedy to frugal splitting strategy in return_cubes. need to test. also there is some bug where the threads take forever to cancel?

* Update RELEASE_NOTES.md

* resolve bug about not translating managers correctly for the second phase of the greedy cubing, and the frugal fallback

* remove unused square-free check

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* add some debug prints and impelement internal polynomial fix

* add some comments and debug m_assumptions_used

* redo greedy->frugal strategy so we don't split on existing cubes in frugal at all (eliminate the incorrect/wasteful step by processing current batch first)

* set up initial scaffolding for sharing clauses between threads and batch manager. needs some reworking/debug still

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Signed-off-by: Lev Nachmanson <levnach@Levs-MacBook-Pro.local>
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* sign of life

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* add notes on parameter tuning

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* add notes on parameter tuning

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* add notes on parameter tuning

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* add notes on parameter tuning

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* turn off logging at level 0 for testing

* add max thread conflicts backoff

---------

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* fix #7776

* add > operator as shorthand for Array

* updates to euf completion

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* Add virtual translate method to solver_factory class (#7780)

* Initial plan

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Add documentation for the translate method in solver_factory

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

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* put return_cubes under lock

* Revert "resolve bug about not popping local ctx to base level before collecting shared lits"

This reverts commit bba1111e1b.

* Update seq_rewriter.cpp

* fix releaseNotesSource to inline

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Use solver factory translate method in Z3_solver_translate (#7782)

* Initial plan

* Fix Z3_solver_translate to use solver factory translate method

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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* Revert "Parallel solving (#7775)" (#7777)

This reverts commit c8e866f568.

* remove upload artifact for azure-pipeline

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Fix compilation warning: add missing is_passive_eq case to switch statement (#7785)

* Initial plan

* Fix compilation warning: add missing is_passive_eq case to switch statement

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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* Remove NugetPublishNightly stage from nightly.yaml (#7787)

* Initial plan

* Remove NugetPublishNightly stage from nightly.yaml

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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* add more params

* enable pypi public

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Fix nullptr dereference in pp_symbol when handling null symbol names (#7790)

* Initial plan

* Fix nullptr dereference in pp_symbol with null symbol names

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* add option to control epsilon #7791

#7791 reports on using model values during lex optimization that break soft constraints.
This is an artifact of using optimization where optimal values can be arbitrarily close to a rational.
In a way it is by design, but we give the user now an option to control the starting point for epsilon when converting infinitesimals into rationals.

* update on euf

* check for internalized in solve_for

* fix #7792

add missing revert operations

* update version number to 4.15.4

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7753

* fix #7796

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Create centralized version management with VERSION.txt (#7802)

* Initial plan

* Create VERSION.txt and update CMakeLists.txt to read version from file

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete centralized version management system

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* Fix version update script and finalize implementation

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* Create centralized version management with VERSION.txt

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

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* read version from VERSION.txt

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* fix version parse

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* fix parsing of version

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* add param tuning experiment in python

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---------

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* Update nightly.yaml to match release.yml NuGet tool installer changes (#7810)

* Initial plan

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

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* Attempt at adding the README to the NuGet package (#7807)

* Attempt at adding README to NuGet package

* Forgot to enable publishing

* add resources

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove resources directive again

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Document how to use system-installed Z3 with CMake projects (#7809)

* Initial plan

* Add documentation for using system-installed Z3 with CMake

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Fix Julia bindings linker errors on Windows MSVC (#7794)

* Initial plan

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Complete Julia bindings fix validation and testing

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* Fix Julia bindings linker errors on Windows MSVC

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

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* add print for version file

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add more logging to setup.py

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* try diferennt dirs

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* try src_dir_repo

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* try other dir

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove extra characters

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* more output

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* print dirs

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* copy VERSION from SRC_DIR

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Move VERSION.txt to scripts directory and update all references (#7811)

* Initial plan

* Move VERSION.txt to scripts/ and update all references

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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* clean up a little of the handling of VERSION.txt

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add implementation and toggleable param for splitting frugal + choosing deepest cubes only

* remove priority queue for top-k lits and replace with simple linear scan. the PQ implementation backend still remains in case we want to switch back

* Add new configurations for SMT parallel settings

* Bugfix: post-build sanity check when an old version of ocaml-z3 is installed (#7815)

* fix: add generating META for ocamlfind.

* Patch macos. We need to keep the `@rpath` and use environment var to enable the test because we need to leave it to be fixed by package managers.

* Trigger CI.

* Debug.

* Debug.

* Debug.

* Debug.

* Debug.

* Debug.

* Hacky fix for ocaml building warning.

* Fix typo and rename variables.

* Fix cmake for ocaml test, using local libz3 explicit.

* Rename configuration from 'shareconflicts' to 'depthsplitting'

* Fix configuration for depth splitting in notes

* rename variables

* remove double tweak versioning

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* attempting to add backbone code, it does not work. still debugging the error: ASSERTION VIOLATION
File: /home/t-ilshapiro/z3/src/ast/ast.cpp
Line: 388
UNEXPECTED CODE WAS REACHED. I left a comment on the line where it's crashing

* depth splitting now applies to greedy+frugal unless specified otherwise

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This commit is contained in:
Ilana Shapiro 2025-08-26 22:22:16 -07:00 committed by GitHub
parent 5db6571acf
commit 7f559b5831
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
5 changed files with 124 additions and 68 deletions

View file

@ -4,8 +4,7 @@ variables:
Minor: '15'
Patch: '4'
ReleaseVersion: $(Major).$(Minor).$(Patch)
AssemblyVersion: $(Major).$(Minor).$(Patch).$(Build.BuildId)
NightlyVersion: $(AssemblyVersion)-$(Build.buildId)
NightlyVersion: $(Major).$(Minor).$(Patch).$(Build.BuildId)
# TODO: Auto-read from VERSION.txt when Azure DevOps supports it better
stages:

View file

@ -255,6 +255,7 @@ set(z3ml_example_src ${PROJECT_SOURCE_DIR}/examples/ml/ml_example.ml)
add_custom_command(
TARGET build_z3_ocaml_bindings POST_BUILD
COMMAND "${OCAMLFIND}" ocamlc
-cclib "${libz3_path}/libz3${so_ext}"
-o "${z3ml_bin}/ml_example.byte"
-package zarith
-linkpkg
@ -270,6 +271,7 @@ add_custom_command(
add_custom_command(
TARGET build_z3_ocaml_bindings POST_BUILD
COMMAND "${OCAMLFIND}" ocamlopt
-cclib "${libz3_path}/libz3${so_ext}"
-o "${z3ml_bin}/ml_example"
-package zarith
-linkpkg

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@ -10,8 +10,9 @@ def_module_params('smt_parallel',
('max_conflict_mul', DOUBLE, 1.5, 'increment multiplier for max-conflicts'),
('share_units_initial_only', BOOL, False, 'share only initial Boolean atoms as units'),
('cube_initial_only', BOOL, False, 'cube only on initial Boolean atoms'),
('max_cube_size', UINT, 20, 'maximum size of a cube to share'),
('max_cube_depth', UINT, 20, 'maximum depth (size) of a cube to share'),
('max_greedy_cubes', UINT, 1000, 'maximum number of cube to greedily share before switching to frugal'),
('num_split_lits', UINT, 2, 'how many literals, k, we split on to create 2^k cubes'),
('frugal_deepest_cube_only', BOOL, False, 'only apply frugal cube strategy, and only on a deepest (biggest) cube from the batch manager'),
('depth_splitting_only', BOOL, False, 'only apply frugal cube strategy, and only on deepest (biggest) cubes from the batch manager'),
('backbone_detection', BOOL, False, 'apply backbone literal heuristic'),
))

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@ -25,6 +25,8 @@ Author:
#include "smt/smt_lookahead.h"
#include "params/smt_parallel_params.hpp"
#include <cmath>
#ifdef SINGLE_THREAD
namespace smt {
@ -103,6 +105,17 @@ namespace smt {
if (asms.contains(e))
b.report_assumption_used(m_l2g, e); // report assumptions used in unsat core, so they can be used in final core
if (m_config.m_backbone_detection) {
expr_ref_vector backbone_candidates = find_backbone_candidates();
expr_ref_vector backbones = get_backbones_from_candidates(backbone_candidates);
if (!backbones.empty()) { // QUESTION: how do we avoid splitting on backbones????
for (expr* bb : backbones) {
ctx->assert_expr(bb); // local pruning
b.collect_clause(m_l2g, id, bb); // share globally // QUESTION: gatekeep this behind share_units param????
}
}
}
LOG_WORKER(1, " found unsat cube\n");
if (m_config.m_share_conflicts)
b.collect_clause(m_l2g, id, mk_not(mk_and(unsat_core)));
@ -139,6 +152,7 @@ namespace smt {
m_config.m_max_conflict_mul = pp.max_conflict_mul();
m_config.m_max_greedy_cubes = pp.max_greedy_cubes();
m_config.m_num_split_lits = pp.num_split_lits();
m_config.m_backbone_detection = pp.backbone_detection();
// don't share initial units
ctx->pop_to_base_lvl();
@ -281,7 +295,7 @@ namespace smt {
}
for (unsigned i = 0; i < std::min(m_max_batch_size / p.num_threads, (unsigned)m_cubes.size()) && !m_cubes.empty(); ++i) {
if (m_config.m_frugal_deepest_cube_only) {
if (m_config.m_depth_splitting_only) {
// get the deepest set of cubes
auto& deepest_cubes = m_cubes_depth_sets.rbegin()->second;
unsigned idx = rand() % deepest_cubes.size();
@ -360,7 +374,7 @@ namespace smt {
return l_undef; // the main context was cancelled, so we return undef.
switch (m_state) {
case state::is_running: // batch manager is still running, but all threads have processed their cubes, which means all cubes were unsat
if (!m_cubes.empty() || (m_config.m_frugal_deepest_cube_only && !m_cubes_depth_sets.empty()))
if (!m_cubes.empty() || (m_config.m_depth_splitting_only && !m_cubes_depth_sets.empty()))
throw default_exception("inconsistent end state");
if (!p.m_assumptions_used.empty()) {
// collect unsat core from assumptions used, if any --> case when all cubes were unsat, but depend on nonempty asms, so we need to add these asms to final unsat core
@ -448,12 +462,12 @@ namespace smt {
for (unsigned i = start; i < stop; ++i) {
// copy the last cube so that expanding m_cubes doesn't invalidate reference.
auto cube = m_cubes[i];
if (cube.size() >= m_config.m_max_cube_size)
if (cube.size() >= m_config.m_max_cube_depth)
continue;
m_cubes.push_back(cube);
m_cubes.back().push_back(m.mk_not(atom));
m_cubes[i].push_back(atom);
m_stats.m_max_cube_size = std::max(m_stats.m_max_cube_size, m_cubes.back().size());
m_stats.m_max_cube_depth = std::max(m_stats.m_max_cube_depth, m_cubes.back().size());
m_stats.m_num_cubes += 2;
}
};
@ -464,7 +478,7 @@ namespace smt {
expr_ref_vector g_cube(l2g.to());
for (auto& atom : c)
g_cube.push_back(l2g(atom));
if (g_cube.size() >= m_config.m_max_cube_size) // we already added this before!! we just need to add the splits now
if (g_cube.size() >= m_config.m_max_cube_depth) // we already added this before!! we just need to add the splits now
continue;
// add depth set d+1 if it doesn't exist yet
@ -481,13 +495,13 @@ namespace smt {
m_cubes_depth_sets[d + 1].push_back(g_cube);
m_stats.m_num_cubes += 2;
m_stats.m_max_cube_size = std::max(m_stats.m_max_cube_size, d + 1);
m_stats.m_max_cube_depth = std::max(m_stats.m_max_cube_depth, d + 1);
}
};
std::scoped_lock lock(mux);
unsigned max_greedy_cubes = 1000;
bool greedy_mode = (m_cubes.size() <= max_greedy_cubes) && !m_config.m_frugal_cube_only && !m_config.m_frugal_deepest_cube_only;
bool greedy_mode = (m_cubes.size() <= max_greedy_cubes) && !m_config.m_frugal_cube_only;
unsigned a_worker_start_idx = 0;
//
@ -500,7 +514,11 @@ namespace smt {
continue;
m_split_atoms.push_back(g_atom);
add_split_atom(g_atom, 0); // split all *existing* cubes
if (m_config.m_depth_splitting_only) {
add_split_atom_deepest_cubes(g_atom); // split all *existing* cubes in the depth sets data structure
} else {
add_split_atom(g_atom, 0); // split all *existing* cubes
}
if (m_cubes.size() > max_greedy_cubes) {
greedy_mode = false;
++a_worker_start_idx; // start frugal from here
@ -518,14 +536,14 @@ namespace smt {
g_cube.push_back(l2g(atom));
unsigned start = m_cubes.size(); // update start after adding each cube so we only process the current cube being added
if (m_config.m_frugal_deepest_cube_only) {
if (m_config.m_depth_splitting_only) {
// need to add the depth set if it doesn't exist yet
if (m_cubes_depth_sets.find(g_cube.size()) == m_cubes_depth_sets.end()) {
m_cubes_depth_sets[g_cube.size()] = vector<expr_ref_vector>();
}
m_cubes_depth_sets[g_cube.size()].push_back(g_cube);
m_stats.m_num_cubes += 1;
m_stats.m_max_cube_size = std::max(m_stats.m_max_cube_size, g_cube.size());
m_stats.m_max_cube_depth = std::max(m_stats.m_max_cube_depth, g_cube.size());
} else {
m_cubes.push_back(g_cube);
}
@ -534,7 +552,11 @@ namespace smt {
// Split new cube on all existing m_split_atoms not in it
for (auto g_atom : m_split_atoms) {
if (!atom_in_cube(g_cube, g_atom)) {
add_split_atom(g_atom, start);
if (m_config.m_depth_splitting_only) {
add_split_atom_deepest_cubes(g_atom); // split all *existing* cubes in the depth sets data structure
} else {
add_split_atom(g_atom, 0); // split all *existing* cubes
}
if (m_cubes.size() > max_greedy_cubes) {
greedy_mode = false;
break;
@ -550,7 +572,7 @@ namespace smt {
expr_ref g_atom(l2g(A_worker[i]), l2g.to());
if (!m_split_atoms.contains(g_atom))
m_split_atoms.push_back(g_atom);
if (m_config.m_frugal_deepest_cube_only) {
if (m_config.m_depth_splitting_only) {
add_split_atom_deepest_cubes(g_atom);
} else {
add_split_atom(g_atom, initial_m_cubes_size);
@ -573,39 +595,53 @@ namespace smt {
if (!e)
continue;
auto score1 = ctx->m_phase_scores[0][v]; // assigned to true
auto score2 = ctx->m_phase_scores[1][v]; // assigned to false
auto score_pos = ctx->m_phase_scores[0][v]; // assigned to true
auto score_neg = ctx->m_phase_scores[1][v]; // assigned to false
ctx->m_phase_scores[0][v] /= 2; // decay the scores
ctx->m_phase_scores[1][v] /= 2;
if (score1 == 0 && score2 == 0)
if (score_pos == score_neg)
continue;
if (score1 == 0) {
backbone_candidates.push_back(expr_ref(e, m));
continue;
double score_ratio = INFINITY; // score_pos / score_neg;
expr_ref candidate = expr_ref(e, m);
// if score_neg is zero (and thus score_pos > 0 since at this point score_pos != score_neg)
// then not(e) is a backbone candidate with score_ratio=infinity
if (score_neg == 0) {
candidate = expr_ref(m.mk_not(e), m);
} else {
score_ratio = score_pos / score_neg;
}
if (score2 == 0) {
backbone_candidates.push_back(expr_ref(m.mk_not(e), m));
continue;
if (score_ratio < 1) { // so score_pos < score_neg
candidate = expr_ref(m.mk_not(e), m);
// score_ratio *= -1; // insert by absolute value
}
if (score1 == score2)
continue;
// insert into top_k. linear scan since k is very small
if (top_k.size() < k) {
top_k.push_back({score_ratio, candidate});
} else {
// find the smallest in top_k and replace if we found a new element bigger than the min
size_t min_idx = 0;
for (size_t i = 1; i < k; ++i)
if (top_k[i].first < top_k[min_idx].first)
min_idx = i;
if (score1 >= score2) {
double ratio = score1 / score2;
// insert by absolute value
}
else {
double ratio = - score2 / score1;
// insert by absolute value
if (score_ratio > top_k[min_idx].first) {
top_k[min_idx] = {score_ratio, candidate};
}
}
}
// post-process top_k to get the top k elements
for (auto& p : top_k)
backbone_candidates.push_back(expr_ref(p.second, m));
for (expr* e : backbone_candidates)
LOG_WORKER(0, " backbone candidate: " << mk_bounded_pp(e, m, 3) << " head size " << ctx->m_lit_scores->size() << " num vars " << ctx->get_num_bool_vars() << "\n");
return backbone_candidates;
}
@ -614,40 +650,57 @@ namespace smt {
// run the solver with a low budget of conflicts
// if the unsat core contains a single candidate we have found a backbone literal
//
void parallel::worker::test_backbone_candidates(expr_ref_vector const& candidates) {
expr_ref_vector parallel::worker::get_backbones_from_candidates(expr_ref_vector const& candidates) {
expr_ref_vector backbones(m);
unsigned sz = asms.size();
for (expr* e : candidates)
asms.push_back(mk_not(m, e));
LOG_WORKER(0, "GETTING BACKBONES\n");
ctx->get_fparams().m_max_conflicts = 100;
lbool r = l_undef;
try {
r = ctx->check(asms.size(), asms.data());
}
catch (z3_error& err) {
b.set_exception(err.error_code());
}
catch (z3_exception& ex) {
b.set_exception(ex.what());
}
catch (...) {
b.set_exception("unknown exception");
}
asms.shrink(sz);
if (r == l_false) {
auto core = ctx->unsat_core();
LOG_WORKER(2, " backbone core:\n"; for (auto c : core) verbose_stream() << mk_bounded_pp(c, m, 3) << "\n");
for (expr* e : candidates) {
// push ¬c
expr* not_e = nullptr;
if (m.is_bool(e)) { // IT CRASHES ON THIS LINE?????
LOG_WORKER(0, "candidate IS Bool: " << mk_bounded_pp(e, m, 3) << "\n");
not_e = m.mk_not(e);
} else {
// e is a theory atom represented in the SAT solver
LOG_WORKER(0, "candidate is NOT Bool: " << mk_bounded_pp(e, m, 3) << "\n");
}
LOG_WORKER(0, "NEGATED BACKBONE\n");
asms.push_back(not_e);
LOG_WORKER(0, "PUSHED BACKBONES TO ASMS\n");
ctx->get_fparams().m_max_conflicts = 100;
lbool r = l_undef;
try {
r = ctx->check(asms.size(), asms.data());
}
catch (z3_error& err) {
b.set_exception(err.error_code());
}
catch (z3_exception& ex) {
b.set_exception(ex.what());
}
catch (...) {
b.set_exception("unknown exception");
}
asms.shrink(sz); // restore assumptions
if (r == l_false) {
// c must be true in all models → backbone
backbones.push_back(e);
LOG_WORKER(0, "backbone found: " << mk_bounded_pp(e, m, 3) << "\n");
}
}
// TODO
return backbones;
}
expr_ref_vector parallel::worker::get_split_atoms() {
unsigned k = 2;
// auto candidates = ctx->m_pq_scores.get_heap();
auto candidates = ctx->m_lit_scores;
std::vector<std::pair<double, expr*>> top_k; // will hold at most k elements
for (bool_var v = 0; v < ctx->get_num_bool_vars(); ++v) {
@ -667,7 +720,7 @@ namespace smt {
if (top_k.size() < k) {
top_k.push_back({score, e});
} else {
// find the smallest in top_k and replace if we found a new min
// find the smallest in top_k and replace if we found a new element bigger than the min
size_t min_idx = 0;
for (size_t i = 1; i < k; ++i)
if (top_k[i].first < top_k[min_idx].first)
@ -693,22 +746,22 @@ namespace smt {
m_cubes.reset();
m_cubes.push_back(expr_ref_vector(m)); // push empty cube
if (m_config.m_frugal_deepest_cube_only) {
if (m_config.m_depth_splitting_only) {
m_cubes_depth_sets.clear();
}
m_split_atoms.reset();
smt_parallel_params sp(p.ctx.m_params);
m_config.m_max_cube_size = sp.max_cube_size();
m_config.m_max_cube_depth = sp.max_cube_depth();
m_config.m_frugal_cube_only = sp.frugal_cube_only();
m_config.m_never_cube = sp.never_cube();
m_config.m_frugal_deepest_cube_only = sp.frugal_deepest_cube_only();
m_config.m_depth_splitting_only = sp.depth_splitting_only();
}
void parallel::batch_manager::collect_statistics(::statistics& st) const {
//ctx->collect_statistics(st);
st.update("parallel-num_cubes", m_stats.m_num_cubes);
st.update("parallel-max-cube-size", m_stats.m_max_cube_size);
st.update("parallel-max-cube-size", m_stats.m_max_cube_depth);
}
lbool parallel::operator()(expr_ref_vector const& asms) {

View file

@ -47,13 +47,13 @@ namespace smt {
is_exception_code
};
struct config {
unsigned m_max_cube_size = 20;
unsigned m_max_cube_depth = 20;
bool m_frugal_cube_only = false;
bool m_never_cube = false;
bool m_frugal_deepest_cube_only = false;
bool m_depth_splitting_only = false;
};
struct stats {
unsigned m_max_cube_size = 0;
unsigned m_max_cube_depth = 0;
unsigned m_num_cubes = 0;
};
@ -123,8 +123,9 @@ namespace smt {
double m_max_conflict_mul = 1.5;
bool m_share_units_initial_only = false;
bool m_cube_initial_only = false;
bool m_max_greedy_cubes = 1000;
unsigned m_max_greedy_cubes = 1000;
unsigned m_num_split_lits = 2;
bool m_backbone_detection = false;
};
unsigned id; // unique identifier for the worker
@ -146,7 +147,7 @@ namespace smt {
} // allow for backoff scheme of conflicts within the thread for cube timeouts.
expr_ref_vector find_backbone_candidates();
void test_backbone_candidates(expr_ref_vector const& candidates);
expr_ref_vector get_backbones_from_candidates(expr_ref_vector const& candidates);
public:
worker(unsigned id, parallel& p, expr_ref_vector const& _asms);
void run();