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This is in preparation of having two different kinds (`CONST_RATIONAL`
and `CONST_INT`) share the same payload. To do so, we cannot rely on
`ConstantMap<Rational>` anymore to map the payload type to a kind. This
commit extends support in the `mkmetakind` script to deal with such
payloads by adding a `+` suffix to the type. The commit also does some
minor refactoring of `NodeManager::mkConst()` and
`NodeManager::mkConstInternal()` to support setting the kind explicitly.
Finally, the commit addresses all instances where `mkConst<Rational>()`
is used, including the API.
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This further renames kind SET_INTERSECTION to SET_INTER.
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This PR expands bag.choose operator as a preprocessing step.
It also refactors the implementation of choose operator for sets
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This prefixes sets kinds with SET_ and relation kinds with
RELATION_. It also prefixes the corresponding SMT-LIB operators with
'set.' and relation operators with 'rel.'.
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This is the result of a global replace Rewriter::rewrite( -> rewrite( + patching the results.
It makes several classes into EnvObj. Many calls to Rewriter::rewrite remain (that are embedded in classes that should not be EnvObj).
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This makes all methods for constructing skolems local to SkolemManager.
It removes infrastructure for node manager listeners being notified when skolems are constructed. This was used for 2 things:
(1) The old dumping infrastructure, where skolems could contribute in part to traces to print benchmarks. This code will be deleted soon.
(2) The miplib preprocessing pass, which used this functionality to listen to what skolems were constructed, and subsequently assumed these skolems coincided with what Boolean variables appeared in assertions. This is highly error prone, and has been replaced by a simple traversal to collect Boolean variables in assertions.
This is in preparation for a lazy lambda lifting technique, which will require more infrastructure in SkolemManager.
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There is 1 remaining call to Rewriter::rewrite in the bags type enumerator which is not straightforward to eliminate; it should perhaps call an intermediate call to a normal form utility instead of the full rewriter.
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This PR fixes an issue where we did compute upwards closure (for join, product, etc.) on equivalence classes whose membership cache had already been initialized (perhaps recursively from the computation of upwards/downwards closures on other terms).
It also generalizes the fix from #7511. Instead of doing explicit splitting, we mark shared terms and let theory combination (when necessary) do splitting. This is required to fix a more general version of the benchmark from the previous PR, where instead now a term c+1 is used in a position that is relevant to a join.
It disables a regression that times out after these fixes, and does further cleanup.
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This fixes a model unsoundness issue in the theory solver for relations.
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Eliminates a style where proof node manager was passed as an argument to indicate proofs enabled if non-null. All theory inference managers now check Env::isTheoryProofProducing instead.
Since BV did not pass a proof node manager to its inference manager, this PR also incidentally enables equality engine proofs for BV.
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Fixes #7430.
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In preparation for breaking more dependencies on TheoryEngine.
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This removes TheoryState::getSatContext() and
TheoryState::getUserContext().
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This removes the methods `getEnv()`, `options()`, `getSatContext()`, and
`getUserContext()` from the `Theory` class because they are now part of
`EnvObj`. Additionally, this commit converts the inference managers to
`EnvObj` because of there were some calls to retrieve the contexts from
`Theory` in those classes.
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This further renames EnvObj::getLogicInfo to EnvObj::logicInfo.
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This PR is a follow-up to #7011, making the Env object available in the TheoryState base class.
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This PR changes the Theory base class and the constructors of all theories to use the Env class to access contexts, logic information and the proof node manager.
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The only remaining unknown inferences covered by our regressions are from the sygus solver, will address in later PR.
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This enables default support for equality proofs in the theory of sets.
This is in preparation for proofs in the central equality engine, which requires that all active theories that use the central equality engine at least support the default interaction with the equality engine.
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This fixes an unsoundness issue in the sets + cardinality solver.
One rule of this solver applies in sets when two parents of a child of a cardinality graph are equal, in which case we know that child or one of its siblings must be equal to the opposite parent. For example, this rule tells us that:
if T = (union T S), then (intersect T S) = S.
The explanation of this rule could consider the representative term of one the parents instead of the term itself say (union T S) is representative T, giving the unsound inference: if (union T S) = (union T S), then (intersect T S) = S. This ensures we use the original terms.
This PR also does some minor cleanup.
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This adds fields to equality engine setup information which will be used to hook up theories to the central equality engine.
This PR does not impact any behavior.
This is in preparation for the central equality engine.
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We store constants, e.g., BitVector and Rational, in our node infrastructure. As a result, we were indirectly including some headers in almost all files, e.g., the GMP headers. This commit changes that by forward-declaring the classes for the constants. As a result, we have to include headers like util/rational.h explicitly when we use Rational but it saves about 3 minutes in compile time (CPU time).
The commit changes RoundingMode from an enum to an enum class such that it can be forward declared.
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This moves all generic proof utilites from src/expr/ and src/theory/ to src/proof/.
It also changes the include for term conversion proof generator to conv_proof_generator in preparation to rename this utility on a followup PR (to avoid confusion with the use of "Term").
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This also makes the relations solver use the inference manager in the standard way.
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Eliminates NodeHashFunction, TNodeHashFunction and TypeNodeHashFunction.
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This adds proofs for sets purification lemmas, which are of the form (= t (skolem t)) and (member t (skolem (singleton t))). Each can be trivially justified in the internal calculus by MACRO_SR_PRED_INTRO.
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This is work towards eliminating global calls to getCurrentSmtEngine()->expandDefinition.
The next step will be to add Rewriter::expandDefinition.
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This commits changes the build system to cvc5 and removes the remaining
occurrences of CVC4. It further cleans up outdated/unused scripts in contrib/.
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This renames everything but GitHub links and build system related
macros. Switching the build system to cvc5 will be the last step in the
renaming process.
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The join image type rule restricted that an argument was a constant. This is a logic restriction that should not be a part of the type checker.
This is required for not throwing type checking exceptions during proof conversion to LFSC.
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This PR refactors how we collect statistics.
It splits the current statistic values into the values and a proxy object. The actual values now live inside the registry (making the ownership model way easier) while the proxy object are handed to whoever wants to collect a new statistic.
It also extends the C++ API to obtain and inspect the statistics.
To change the ownership, this PR needs to touch every single statistic in the whole codebase and change how it is registered.
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This PR generalizes TypeNode::isFinite / TypeNode::isInterpretedFinite with TypeNode::getCardinalityClass. It then uses this method to fix our computation of when a type should be treated as finite.
Fixes #4260, fixes #6100 (that benchmark now says unknown without an error).
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This PR classifies all internal kinds of incompleteness as identifiers.
It makes it so TheoryEngine records an identifier when its incomplete flag is set.
The next step will be to possibly communicate this value to the user.
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This is in preparation for refactoring skolem creation throughout the code base to improve proofs and migrate Theory::expandDefinitions to Rewriter::expandDefinitions.
This PR also eliminates some unused code in TheoryArithPrivate.
Followup PRs will start formalizing/eliminating calls to mkDummySkolem.
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Currently, NodeBuilder takes a single template argument: An integer
that determines the expected number of arguments. This argument is used
to determine the size of the d_inlineNvChildSpace array. This array is
used to construct nodes inline. The advantage of this is that we don't
have to allocate a NodeValue on the heap for the node under
construction until we are sure that the node is new. While templating
the array size may save some stack space (or avoid a heap allocation if
we statically know that we a fixed number of children and that number is
greater than 10), it complicates the code and leads to longer compile
times. Thus, this commit removes the template argument and moves some of
the NodeBuilder code to a source file for faster compilation.
CPU build time before change (debug build): 2429.68s
CPU build time after change (debug build): 2228.44s
Signed-off-by: Andres Noetzli noetzli@amazon.com
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Fixes #4370.
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Each theory has its own proof checker, responsible for checking the rules pertaining to that theory. The main proof checker uses these specialized checkers. Previously the main proof checker (of the proof node manager used across the SMT solver) was connected to these theory proof checkers during initialization of the theory. This commit adds an interface to the theories for retrieving its proof checker (analogous to how one retrieves the rewriter of a theory) which is used by a new method in the theory engine to register a theory proof checker to a given proof checker according to a theory id.
This is in preparation for the new unsat cores based on proofs.
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We were getting types for set singleton/membership in a way that was unsafe for subtyping, which was leading to incorrectly computing care graphs for sets of reals.
Fixes #5705.
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Towards having complete stats on inference ids for each lemma, fact, and conflict.
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The build system (cmake) will automatically generate an export header
cvc4_export.h, which makes sure that the correct export features are
defined depending on the compiler and target platform. The macro CVC4_EXPORT
replaces CVC4_PUBLIC and its usage is reduced by 2/3.
Co-authored-by: Gereon Kremer <nafur42@gmail.com>
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This ensures we do not return WITNESS terms in response to ppRewrite. This makes standard utility methods in SkolemLemma to help make this easy.
It also removes TheorySetsPrivate::expandDefinitions, which was returning WITNESS in response to expandDefinitions, which is no longer permitted.
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