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Fixes #4942. The Python API was missing some methods related to
datatypes. Most importantly, it was missing mkDatatypeSorts, which
meant that datatypes with unresolved placeholders could not be resolved.
This commit adds missing methods and ports the corresponding tests of
datatype_api_black.h to Python. The commit also adds support for
__getitem__ in Term.
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This PR removes any usage of the #line directive.
We no longer consider it particularly useful, and it obstructs reproducible builds (see #4980).
Fixes #4980.
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This includes support for some trusted rules (whose use is to come). It also modifies THEORY_REWRITE so that it is a "trusted" rule, that is, it is not re-checked. The reason for this is that TheoryRewriter is not deterministic. An example of non-determinism in TheoryRewriter are rules that introduce bound variables (e.g. quantifiers rewriter) since these bound variables are fresh each time it is invoked. Non-deterministic theory rewriters cannot be rechecked, which was leading to failures on proof-new at proof check time. The other way to fix this would be to cache TheoryRewriter responses, but then the checker would only be verifying that the caching was being done properly. This is not worthwhile.
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This makes TheoryUF use a standard theory inference manager, which thus makes it proof producing when proof-new is enabled.
This additionally cleans HoExtension so that it does not keep a backwards reference to TheoryUF and instead takes its inference manager. This additionally adds two rules for higher-order that are required to make its equality engine proofs correct.
Co-authored-by: Haniel Barbosa <hanielbbarbosa@gmail.com>
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sensitive (#4972)
This will be used by TermFormulaRemoval.
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This commit fixes builds that include CryptoMiniSat after commit
8ad308b23c705e73507a42d2425289e999d47f86 removed them. It also fixes one
of the regressions that requires unsat cores but was run when the build
was configured without them.
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This PR is a step towards the migration of Commands to the public API. Node versions of some Commands are introduced for internal use (as necessary). The DumpManager is refactored to make use of those commands.
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These updates are inspired by the current inference manager for sets.
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This includes using the standard d_conflict flag in TheoryState and splitting its check into 3 callbacks.
It also deletes some unused code and eliminates an assertion (line 791 of theory_arrays.cpp) which doesn't hold in a central architecture.
Further work on standardization for arrays will add an InferenceManager to guard its uses of asserting facts to equality engine (both for proofs and configurable theory combination).
FYI @barrettcw
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We now use std::unique_ptr instead of std::shared_ptr when storing TheoryInference objects.
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This PR adds a new ArithLemma that is essentiall NlLemma, but derived from the new theory::Lemma and meant to be used all across the arithmetic theory.
Also, based on theory::InferenceManagerBuffered this PR adds arith::InferenceManager that shall become the sole interface between the arithmetic theory and the OutputChannel.
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This updates the theory of sets to the new interface (see #4929).
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When testing the API examples, Python examples were not included. This
commit changes that and fixes multiple minor issues that came up once
the tests were enabled:
- It adds `Solver::supportsFloatingPoint()` as an API method that
returns whether CVC4 is configured to support floating-point numbers
or not (this is useful for failing gracefully when floating-point
support is not available, e.g. in the case of our floating-point
example).
- It updates the `expections.py` example to use the new API.
- It fixes the `sygus-fun.py` example. The example was passing a _set_
of non-terminals to `Solver::mkSygusGrammar()` but the order in which
the non-terminals are passed in matters because the first non-terminal
is considered to be the starting terminal. The commit also updates the
documentation of that function.
- It fixes the Python API for datatypes. The `__getitem__` function had
a typo and the `datatypes.py` example was crashing as a result.
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This deletes much of the old proof code. Basically everything but the minimal necessary infra-structure for producing unsat cores. That includes dependency tracking in preprocessing, the prop engine proof and the unsat core computation code in the old proof manager. These should also go once we fully integrate into master the new proof infrastructure.
It also cleans interfaces that were using old-proof-code-specific constructs (such as LemmaProofRecipe). When possible or when it made sense standalone local proof production code was kept, but deactivated (such is in the equality engine and in the arithmetic solver).
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Updates it to use the new inference manager as well as updating its check to the standard callbacks.
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This introduces a TheoryInference base class, which is a generalization and cleaner version of the former Lemma object. This changes the name of Lemma -> SimpleTheoryLemma, and makes the callback responsible for calling the inference manager.
This PR also updates the datatypes inference manager to use the new style. This required adding some additional interfaces to TheoryInferenceManager.
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We'll use this to gate farkas-coefficient machinery after we remove the
old proof-macros.
I've changed the macros slightly from the proof-new branch: I removed the dependence on options::proof() (no longer wanted) and options::unsatCores() (I had copied this from the original proof macros, but it's not needed either, since we're in a theory).
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When using CMake with Unix Makefiles, one can invoke `make install` as
```
make install DESTDIR=/a/b/c
```
so that the files will be installed into `$DESTDIR$CMAKE_INSTALL_PREFIX` (see the [documentation](https://cmake.org/cmake/help/latest/envvar/DESTDIR.html) for details). This currently doesn't work with the `fix-install-headers.sh` script:
```
[...]
-- Installing: /<<PKGBUILDDIR>>/debian/tmp/usr/include/cvc4/util/integer.h
-- Installing: /<<PKGBUILDDIR>>/debian/tmp/usr/include/cvc4/util/rational.h
find: ‘/usr/include/cvc4/’: No such file or directory
```
Here, `CMAKE_INSTALL_PREFIX` is `/usr` but `DESTDIR` is `/<<PKGBUILDDIR>>/debian/tmp/`.
This commit makes the script consider `DESTDIR` (if it is not set, then `$DESTDIR` will be empty and nothing changes) to fix this issue.
Signed-off-by: Fabian Wolff <fabi.wolff@arcor.de>
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This is in preparation for converting datatypes to the new standard. It adds a specialized version of inference manager buffered that datatypes uses. This required adding several utility methods to its base classes.
A follow up PR will connect this to TheoryDatatypes.
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Signed-off-by: Fabian Wolff <fabi.wolff@arcor.de>
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This updates theory of strings to the new standard.
This makes strings use the standard template for check and collectModelInfo. It also updates its inference manager to the standard and makes use of assertFactInternal for processing internal facts. This now enables preNotifyFact and notifyFact to be defined in TheoryStrings instead of inside inference manager, which is clearer and eliminates some dependencies within inference manager.
Note that the inference manager of strings for now inherits from TheoryInferenceManager. Further standardization will make it inherit from the new InferenceManagerBuffered class.
This design will be merged into proof-new, which also has significant changes to strings inference manager.
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equal selects (#4981)
The implementation of --ackermann mishandled selects in a subtle way:
If select is applied to two syntactically different arrays (that may be semantically equal), the ackermann preprocessing failed to generate the "all arguments equal implies terms equal" lemmas.
The problem is that we used the first argument (that is: the array) as lookup to identify terms that need to be considered for these lemmas. Instead we now use their operator (select) just like for uninterpreted function applications.
Fixes #4957 . Also adds a regression.
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This is a followup to #4945 which simplifies the contract for computeRelevantTerms.
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This adds basic support for asserting internal facts with proofs in the inference manager class.
The purpose of this PR is twofold:
(1) From the point of view of proofs, this PR standardizes the management of proof equality engine within inference manager. Theories no longer have to manually construct proof equality engines, and instead are recommended to create inference managers.
(2) From the point of view of the new approach to theory combination, this PR ensures standard theory callbacks (preNotifyFact / notifyFact) are used for internal facts, regardless of whether proofs are enabled.
This will simplify several of the current (unmerged) changes for proof production in theory solvers on proof-new.
Notice this PR adds the utility method NodeManager::mkAnd, which is arguably long overdue.
Also notice this code is not yet active, but will be used on proof-new after this PR is merged.
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These utilities will be used for making some of the core proof utilities term-context-sensitve.
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This makes it so that equality_engine.h does not include theory.h. This is a bad dependency since Theory contains EqualityEngine.
This dependency between equality engine and theory was due to the use of a helper (Theory::Set) for representing sets of theories that is inlined into Theory. This PR moves this definition and utilities to theory_id.h.
It fixes the resulting include dependencies which are broken by changing the include theory.h -> theory_id.h in equality_engine.h.
This avoids a circular dependency in the includes between Theory -> InferenceManager -> ProofEqualityEngine -> EqualityEngine -> Theory.
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This PR adds support for incremental solving in bv_to_int.
This amounts to:
using context dependent data structures
adding a test
In addition, we check for parametrized operations in a more robust way (using kind::metakind::PARAMETERIZED) and rename some tests for convenience.
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Makes combination engine proof producing (for Boolean splits). Followup PRs will start to add proof production in TheoryEngine.
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TheoryQuantifiers is a theory that passes quantified formulas to QuantifiersEngine. This updates it to the new check template (see #4929).
Also does some minor cleanup in the cpp file.
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This PR adds the proof post-processor, which is the final authority on putting together the overall proof. It additionally implements lazy pedantic failures and statistics.
This PR also corrects a subtle bug in the elimination of SUBS which requires a TRUE_INTRO/FALSE_INTRO in certain cases.
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This updates the theory of floating points to the new interface (see #4929).
Notice that TheoryFP was not adding trigger terms to its equality engine (which should be done during notifySharedTerm), and thus was not propagating equalities between shared terms in combined theories. This PR updates its notifySharedTerm method to the default one.
FYI @martin-cs
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The lemma generation for partial cad checks had a number of issues that have been fixed in this PR.
The previous version had both soundness issues and a very naive approach to handling algebraic numbers.
This new version is sound (fingers crossed) and allows to construct more precise, but also more complex lemmas.
To avoid constructing very large lemmas, a (somewhat arbitrary) limit based on the size of coefficients was added.
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Currently, the theory of datatypes buffers its processing of when equivalence class merges are processed. This was an earlier design to avoid using the equality engine while it was doing internal operations. Now, equivalence class merge callbacks are called at a time when it is safe to use the equality engine and thus this level of indirection is unnecessary.
This will simplify further work on datatypes towards having a standard inference manager.
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This class implements a highly common pattern of buffering facts and lemmas to send on the output channel. It is planned that the inference managers of strings, sets, datatypes, (non-linear) arithmetic, sep, quantifiers will inherit from this class.
This PR adds basic calls to add lemmas on the output channel from InferenceManager.
It introduces a Lemma virtual class which arith::nl::NlLemma and strings::InferInfo will inherit from.
This is required to begin refactoring a flexible configurable strategy for non-linear arithmetic, and will make it easier to further develop towards a configurable approach for theory combination.
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This updates the theory of separation logic to the new interface, which involves splitting up its check method based on the 4 check callbacks and using the theory state in the standard way.
No behavior changes, unfortunately a lot of code had to change indentation and was updated to new coding guidelines.
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For some reason, the nl subsolver for IAND did not annotate its lemmas with `Inference` types yet. This commit adds appropriate `Inference` values and makes the IAND solver use them.
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This is a (partial) layer on top of EqualityEngine that is a universal black box proof generator for users of the equality engine.
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Currently, Theory is responsible for implementing a computeRelevantTerms method collects the union of:
(1) The terms appearing in its assertions and its shared terms,
(2) The set of additional terms the theory believes are relevant.
Currently, (1) is computed by an internal Theory method computeRelevantTermsInternal, and the overall computeRelevantTerms is overridden by the theory (for datatypes and arrays only) for also including (2).
The new plan is that Theory will only need to compute (2). Computing (1) will be the job of ModelManager::collectAssertedTerms and the model manager will call Theory::computeRelevantTerms as an additional step prior to its calls to collect model info.
This will make certain optimizations possible in theory combination (e.g. tracking asserted terms incrementally).
This PR adds the ModelManager::collectAssertedTerms method and also adds infrastructure for irrelevant kinds in the model object (which have an analogous interface as when "unevaluated" kinds are marked during initialization). It does not connect the implementation yet.
FYI @barrettcw
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This class is a wrapper around OutputChannel and EqualityEngine. It is preferred that the Theory use this interface when asserting "internal facts" to the equality engine, and for sending lemmas, conflicts and propagations on the output channel.
This class will be useful when trying new methods for theory combination, where all theories behavior can be modified in a standard way based on modifications to the base inference manager class.
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This updates TheoryUF to use the 4 check callbacks instead of implementing check, and uses the official TheoryState object instead of its context::CDO<bool> d_conflict field.
It also makes a minor change to collectModelValues for const and to preNotifyFact to include an isInternal flag.
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This connects the implementation of CombinationEngine into TheoryEngine. By default, the combination engine of theory engine is CombinationCareGraph.
This PR also consolidates and simplifies how models are built, note that:
The TheoryModel object no longer tracks whether it is built, instead that is the job of ModelManager,
The TheoryModelBuilder object is no longer responsible for calling TheoryEngine's collect model info method.
Quantifiers engine uses a simpler interface for ensuring that TheoryEngine's model is built.
This PR also makes some minor simplifications to TheoryEngine from the centralEe branch.
Note that no significant behavior changes are intended in this PR.
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This PR makes two simultaneous changes:
The new API uses Node-level DType instead of Expr-level Datatype. This required converting 2 of the last remaining calls in the parser that used Expr to use the new API.
Internally constructed datatypes (e.g. for sygus) use Node-level DType instead of Expr-level Datatype. Note this required moving a block of code for handling a corner case of sygus from Datatype -> DType.
This PR removes :
ExprManger::mkDatatypeType.
The Expr-level datatype itself. This PR removes all references to its include file.
It also updates one remaining unit test from Expr -> Node.
This PR will enable further removal of other datatype-specific things in the Expr layer.
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checking unsat cores (#4941)
Doing it via commands being added to the coreChecker SMT engine is not necessary since we can directly add assertions after expansion from the original SMT engine.
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This adds the combination engine, which is the module of TheoryEngine which implements the combineTheories method and owns the various components of theory combination, which includes equality engine manager, model manager, and the "shared solver" (to come later). It will have two variants, CombinationCareGraph and CombinationModelBased, the former is added with this PR.
FYI @barrettcw
The next PR will connect this module to TheoryEngine and remove a few existing methods from TheoryEngine, as they are implemented in the modules of this class.
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This includes a standard method for safe explanations and the option to disable all trigger terms.
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The `parseErrorHelper` message can run into memory errors when the it prints the last line and this last line is not terminated by a newline. I suspect other conditions may trigger it as well (like only using `\r` as line terminator).
This comit computes the size of the buffer from the start of the current line to the end of the buffer and makes sure that we never go beyond this buffer. The calculation looks a bit awkward, I've not been able to obtain this information from the ANTLR input stream in a nicer way...
(I found this issue when looking at #4866).
Fixes #4069 .
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This led to a model soundness issue in rare cases where a relevant literal was dropped due to an entailment check by an irrelevant literal.
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This class is responsible for model building when using a distributed approach for equality engines.
This PR defines the class but does not yet activate it in TheoryEngine.
This includes some model-specific things from TheoryEngine which will be migrated to this class on the next PR.
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