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Previously, we were using UFs to encode substrings in the
`str.to.int`/`int.to.str` reductions. Our experiments have shown,
however, that using `str.substr` is more efficient instead.
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This commit adds a lemma to our encoding of `str.to.int` and
`int.to.str` that relates the integer value in the encodings to the
value of partial results.
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This makes it so that we don't construct intermediate unfoldings of applications of DT_SYGUS_EVAL, which wastes time in node construction. It makes the sygusToBuiltin utility in TermDbSygus use this implementation.
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solver (#3525)
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This commit fixes a corner case in the model construction of strings:
For a given length, we were assuming that for each equivalence class, we
could always find an initial guess for a constant to assign to it. This
was not always true, however, because a preceding equivalence class
could use up all constants and get assigned the last remaining one, so
we wouldn't have a constant remaining for the current class. This
resulted in an assertion failure (in debug) or a crash (in production).
This commit fixes the issue by checking whether we've run out of
constants before assigning an initial constant for an equivalence class.
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API (#3355)
* Treat uninterpreted functions as a child in Term iteration
* Remove unnecessary const_iterator constructor
* Add parameter comments to const_iterator constructor
* Use operator[] instead of storing a vector of Expr children
* Switch pos member variable from int to uint32_t
* Add comment about how UFs are treated in iteration
* Allow OpTerm to contain a single Kind, update OpTerm construction
* Update mkTerm to use only an OpTerm (and not also a Kind)
* Remove unnecessary function checkMkOpTerm
* Update mkOpTerm comments to not use _OP Kinds
* Update examples to use new mkTerm
* First pass on fixing unit test
* Override kind for Constructor and Selector Terms
* More fixes to unit tests
* Updates to parser
* Remove old assert (for Kind, OpTerm pattern which was removed)
* Remove *_OP kinds from public API
* Add hasOpTerm and getOpTerm methods to Term
* Add test for UF iteration
* Add unit test for getOpTerm
* Move OpTerm implementation above Term implemenation to match header file
Moved in header because Term::getOpTerm() returns an OpTerm and the compiler complains
if OpTerm is not defined earlier. Simply moving the declaration is easier/cleaner than
forward declaring within the same file that it's declared.
* Fix mkTerm in datatypes-new.cpp example
* Use helper function for creating term from Kind to avoid nested API calls
* Rename: OpTerm->Op in API
* Update OpTerm->Op in examples/tests/parser
* Add case for APPLY_TESTER
* operator term -> operator
* Update src/api/cvc4cpp.h
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Comment comment suggestion
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Add not-null checks and implement Op from a single Kind constructor
* Undo sed mistake for OpTerm replacement
* Add 'd_' prefix to member vars
* Fix comment and remove old commented-out code
* Formatting
* Revert "Formatting"
This reverts commit d1d5fc1fb71496daeba668e97cad84c213200ba9.
* More fixes for sed mistakes
* Minor formatting
* Undo changes in CVC parser
* Add isIndexed and prefix with d_
* Create helper function for isIndexed to avoid calling API functions in other API functions
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* Refactor compute model value for nl
* Format
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This commit enables compiler warnings for implicit fallthroughs in
switch statements that are not explicitly marked as such. The commit
introduces a new macro `CVC4_FALLTHROUGH` that can be used to indicate
that a fallthrough is intentional. The commit fixes existing warnings
and a bug in the arithmetic rewriter for `abs` (the bug likely couldn't
be triggered easily because we rewrite `abs` to an `ite` while expanding
definitions).
To have the new macro also available in the parser, the commit changes
`src/base/check.h` to be visible to the parser (it includes
`cvc4_private_library.h` now instead of `cvc4_private.h`).
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* Refactor non-linear extension for model-based refinement
* Format
* Minor
* Address
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The current code is creating/destroying datatypes unnecessarily.
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This is work towards splitting a "core solver" object from TheoryStrings.
This moves global functions from TheoryStrings to InferenceManager/SolverState, making them accessible in the future by modules that have references to these objects.
It also corrects an issue where we were maintaining two `d_conflict` fields.
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This adds node-level interfaces for a few missing functions that will be necessary to have a Node-level API for datatypes.
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This commit fixes some minor (performance) issues in
`TheoryStrings::checkFlatForms()`: The `inelig` vector was initialized
with copies of the `start` element instead of all the elements before
`start` and the `else` branch of `count == asize` was looping over all
elements from `1` instead of `start + 1`. Additionally, this commit
refactors the code to be a bit more readable.
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