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TS_UTILS_EXPECT_ABORT can be used if an expression in a unit test is
expected to abort() instead of throwing an exception. This can happen if
CVC4_CHECK or CVC4_DCHECK fail.
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Co-Authored-By: Andres Noetzli <andres.noetzli@gmail.com>
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+ use explicit types in NodeValue
+ add unit test for Term::isParameterized()
Co-Authored-By: makaimann <makaim@stanford.edu>
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* Add support for constant arrays to new C++ API
* Fix macro usage in unit test
* Add not null check
* Add test for null term
* Formatting
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This commit removes the SMT1 parser infrastructure and adds the SMT2 translations of the SMT1 regression tests. For now this commit removes regression test regress3/pp-regfile.smt since the SMT2 translation has a file size of 887M (vs. 172K for the SMT1 version).
Fixes #2948 and fixes #1313.
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We have a conflict if we have `str.in.re(x, R1)` and `~str.in.re(x, R2)`
and `R2` includes `R1` because there is no possible value for `x` that
satisfies both memberships. This commit adds code to detect regular
expression inclusion for a small fragment of regular expressions: string
literals with single char (`re.allchar`) and multichar wildcards
(`re.*(re.allchar)`).
Signed-off-by: Andres Noetzli <anoetzli@amazon.com>
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Solver::checkValidAssuming. (#3197)
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* Implement templated getIndices method for OpTerm
* Add getIndices unit tests
* Update src/api/cvc4cpp.cpp
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Update src/api/cvc4cpp.cpp
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Add comment about DIVISIBLE_OP
* Update test/unit/api/opterm_black.h
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Update test/unit/api/opterm_black.h
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Update test/unit/api/opterm_black.h
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Update test/unit/api/opterm_black.h
Co-Authored-By: Aina Niemetz <aina.niemetz@gmail.com>
* Add exception checks to other unit tests (instead of having its own function)
* Fix unit test names in opterm_black.h
* Add description to docstring for getIndices
* Formatting
* Clang format older commits
* Use '-' in docstring list to match other docstrings
* Support creating DIVISIBLE_OP with a string (for arbitrary precision integers)
* Move mkOpTerm(DIVISIBLE_OP, <str>) test to solver_black.h
* Fix pointer access
* Replace switch statement with if statement
* Guard string input for CVC4::Integer in mkOpTerm for consistency on GMP/CLN back-end
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Adds option --ninja to configure.sh.
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pass_bv_gauss_white.h included bv_gauss.cpp to test the functions in the
anonymous namespace, which resulted in ODR (one definition rule)
violations reported by ASAN.
This commit exposes the functionality required in the unit tests as
private static members of the BVGauss class. Since this is a white unit
test, we can access private members in the tests.
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This commit adds a function to node_algorithm.{h,cpp} that returns the operators that occur in a given node.
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PR #3062 changed `Smt2::setLogic()` to return a heap-allocated command,
which didn't get cleaned up by our `parser_black` unit test. This commit
fixes the memory leak.
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The `--force-logic` command line argument can be used to override a
logic specified in an input file or to set a logic when none is given.
Before this commit, both the `SmtEngine` and the parser were aware of
that argument. However, there were two issues if an input file didn't
specify a logic but `--force-logic` was used:
- Upon parsing `--force-logic`, the `SmtEngine` was informed about it
and set the logic to the forced logic. Then, the parser detected that
there was no `set-logic` command, so it set the logic to `ALL` and
emitted a corresponding warning. Finally, `SmtEngine::setDefaults()`
detected that `forceLogic` was set by the user and changed the logic
back to the forced logic. The warning was confusing and setting the
logic multiple times was not elegant.
- For eager bit-blasting, the logic was checked before resetting the
logic to the forced logic, so it would emit an error that eager
bit-blasting couldn't be used with the logic (which was `ALL` at that
point of the execution). This was a problem in the competition because
our runscript parses the `set-logic` command to decide on the
appropriate arguments to use and passes the logic to CVC4 via
`--force-logic`.
This commit moves the handling of `--force-logic` entirely into the
parser. The rationale for that is that this is not an API-level issue
(if you use the API you simply set the logic you want, forcing a
different logic in addition doesn't make sense) and simplifies the
handling of the option (no listeners need to be installed and the logic
is set only once). This commit also removes the option to set the logic
via `(set-option :cvc4-logic ...)` because it complicates matters (e.g.
which method of setting the logic takes precedence?). For the CVC and
the TPTP languages the commit creates a command to set the logic in
`SmtEngine` when the logic is forced in the parser instead of relying on
`SmtEngine` to figure it out itself.
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Previously, we were just writing temporary files to `/tmp/` but this
commit allows the user to use the `TMPDIR` environment variable to
determine which directory the temporary file should be written to. The
commit adds a helper function for this and also includes some minor
cleanup of existing code.
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This commit enables DRAT-optimization, which consists of two sub-processes:
1. removing unnecessary instructions from DRAT-proofs and
2. not proving clauses which are not needed by DRAT proofs.
These changes have the effect of dramatically shortening some some bit-vector proofs. Specifically, proofs using lemmas in the ER, DRAT, and LRAT formats, since proofs in any of these formats are derived from a (now optimized!) DRAT proof produced by CryptoMiniSat. What follows is a description of the main parts of this PR:
## DRAT Optimization
The DRAT-optimization is done by `drat-trim`, which is bundled with `drat2er`. The (new) function `ClausalBitVectorProof::optimizeDratProof` is our interface to the optimization machinery, and most of the new logic in this PR is in that function.
## CNF Representation
The ability to not prove unused clauses requires a slight architectural change as well. In particular, we need to be able to describe **which** subset of the original clause set actually needs to be proved. To facilitate this, when the clause set for CryptoMiniSat is first formed it is represented as a (a) map from clause indices to clauses and (b) a list of indices. Then, when the CNF is optimized, we temporarily store a new list of the clauses in the optimized formula. This change in representation requires a number of small tweaks throughout the code.
## Small Fixes to Signatures
When we decided to check and accept two different kinds of DRAT, some of our DRAT-checking broke. In particular, when supporting one kind of DRAT, it is okay to `fail` (crash) when a proof fails to check. If you're supporting two kinds of DRAT, crashing in response to the first checker rejecting the proof denies the second checker an opportunity to check the proof. This PR tweaks the signatures slightly (and soundly!) to do something else instead of `fail`ing.
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Due to issues in the current proof code, this commit also disables proof
checking for five QF_LRA benchmarks (see issue #2855).
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The rewrite `BvIteConstChildren` assumes that `BvIteEqualChildren` has
been applied before it runs. However, with nested ITEs, it was possible
to violate that assertion. Given `bvite(c1, bvite(c2, 0, 0), bvite(c3,
0, 0))`, `BvIteEqualChildren` would rewrite that term to `bvite(c2, 0,
0)`. The `LinearRewriteStrategy` then ran `BvIteConstChildren` on
`bvite(c2, 0, 0)` which complained about the equal children. This commit
implements a simple fix that splits the `LinearRewriteStrategy` into two
strategies to make sure that if `BvIteEqualChildren` rewrites a node, we
drop back to the `Rewriter`. This ensures that the rewrites on the
rewritten node are invoked in the correct order.
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This cleans up naming of API functions to create first-order constants and variables.
mkVar -> mkConst
mkBoundVar -> mkVar
declareConst is redundant (= mkConst) and thus, in an effort to avoid redundancy, removed.
Note that we want to avoid redundancy in order to reduce code duplication and maintenance
overhead (we do not allow nested API calls, since this is problematic when tracing API calls).
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`TheoryBVRewriter::RewriteITEBv()` is currently always returning the
status `REWRITE_DONE`. This can result in a situation where a rewritten
node can be rewritten again (which breaks the contract of our rewriter).
The unit test in this commit illustrates the issue. The commit fixes the
issue by returning `REWRITE_AGAIN` or `REWRITE_AGAIN_FULL` if a node
changed. `REWRITE_AGAIN_FULL` is needed if the resulting node may have a
child that is not a subterm of the original expression.
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This commit adds a rewrite that strips endpoints from `str.indexof`
operators if they don't overlap with the string that is being searched
for using `stripConstantEndpoints()`. In addition to that, it makes
`stripConstantEndpoints()` slightly more aggressive by allowing it to
drop substring components that have zero overlap with the string that we
are looking at. Finally, the commit fixes the default argument for
`fullRewriter` of `checkEntailContains()` to be true instead of false,
which should allow for more rewriting opportunities.
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`TheoryStringsRewriter::stripConstantEndpoints()` returns the stripped
endpoints in the vectors `nb` and `ne`. These endpoints were not
computed correctly if string literal had to be split. For example:
```
stripConstantEndpoints({ "ABC" }, { "C" }, {}, {}, 1)
```
returned `true` and only "A" for `nb` (instead of "AB") because we
mistakenly used the amount of overlap between "ABC" and "C" (which is
one) for the length of the stripped prefix.
This commit fixes the issue and adds several unit tests.
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s
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* Connect the plumbing so that BV proofs are enabled when using
CryptoMiniSat
* Also fixed a bug in CNF-proof generation
* Specifically, CNF proofs broke when proving tautological clauses.
Now they don't.
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* ErProof class with LFSC output
* Created a TraceCheckProof class
* parsable from text
* Created an ErProof class
* constructible from a TraceCheckProof
* writable as LFSC
* A bunch of unit tests
* Reponded to Mathias's first set of comments.
Credits to Mathias for many of the fixes!
* Responed to Andres's first set, fixed tests
I accidentally deleted a "!" last time, causing stuff to fail.
* Use Configuration::isAssertionBuild
* Clarified comment
* Responded to Andres's 2nd review
* Gaurding against a memory error.
* Renaming a file.
* Aggressively unlinking temporary files.
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`stripConstantEndpoints()` was returning `true` when the first argument
was a list only containing an empty string, which could lead to rewrite
loops. This commit checks for that case and adds a unit test for it.
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This required fixing the OpTerm handling for mkTerm functions in the API.
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Pulling the first constant string from a replace if there is no overlap
with the search term is subsumed by the rewrite using
`stripConstantEndpoints()`.
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This commit introduces three helper methods for performing multiset
reasoning: an entailment check whether a term is always a strict subset
of another term in the multiset domain (`checkEntailMultisetSubset()`),
a check whether a string term is always homogeneous
(`checkEntailHomogeneousString()`), and an overapproximation for the
multiset domain (`getMultisetApproximation()`). It also adds unit tests
related to multiset reasoning.
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* LFSC ouput & unit test
* Renamed lrat unit test file
* s/DRAT/LRAT/
Thanks Andres!
Co-Authored-By: alex-ozdemir <aozdemir@hmc.edu>
* Addressed Andres' comments
1. Extracted a filter whitespace function.
2. Added @param annotations.
* Addressing Yoni's comments
Tweaked the test method name for LRAT output as LFSC
Added assertions for verifying that clause index lists are sorted during
LFSC LRAT output.
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