cvc5.git
5 years agoFix rewriter for regular expression consume (#3029)
Andrew Reynolds [Sat, 1 Jun 2019 07:04:17 +0000 (09:04 +0200)]
Fix rewriter for regular expression consume  (#3029)

5 years agoQuote symbol when printing empty symbol name (#3025)
Andres Noetzli [Thu, 30 May 2019 18:05:42 +0000 (11:05 -0700)]
Quote symbol when printing empty symbol name (#3025)

When printing an empty symbol name, which can appear in an SMT2 file as
`||`, we were printing the empty string instead of quoting the symbol.
This commit fixes the issue and adds a regression test.

5 years agoAvoid substituting Boolean term variables (#3022)
Andres Noetzli [Mon, 27 May 2019 23:36:17 +0000 (16:36 -0700)]
Avoid substituting Boolean term variables (#3022)

Fixes #3020. Boolean terms that appear in other terms, e.g. a Boolean
array index, are replaced by `BOOLEAN_TERM_VARIABLE`s to make sure that
they are handled properly in theory combination. When doing this
replacement, an equality of the form `(= <Boolean term> <Boolean term
variable)` is added to the assertions. The problem was that
`Theory::ppAssert()` would derive a substitution when this equality was
registered. The commit fixes the problem by not allowing to add
substitutions for `BOOLEAN_TERM_VARIABLE`s.

5 years agoUpdate to symfpu 0.0.7, fixes RTI 3/5 issue (#3007)
Martin [Tue, 21 May 2019 17:49:37 +0000 (18:49 +0100)]
Update to symfpu 0.0.7, fixes RTI 3/5 issue (#3007)

Fixes #2932. fp.roundToIntegral was rounding some very small subnormals up to
between 1 and 2, which is A. wrong and B. not idempotent.  The
corresponding symfpu update fixes this as it was an overflow caused
by the unpacked significand not being able to represent an extra
significand bits.

5 years ago[SMT-COMP 2019] Update run scripts to match tracks (#3018)
Andres Noetzli [Mon, 20 May 2019 18:24:31 +0000 (11:24 -0700)]
[SMT-COMP 2019] Update run scripts to match tracks (#3018)

The "Application Track" has been renamed to "Incremental Track" this
year, so this commit renames the script accordingly and updates the name
of the CVC4 binary that the script calls to be just `cvc4`. The commit
also adds an initial script for the model validation track.

5 years agoFP: Fix regression test and enable SymFPU on Travis. (#3013)
Aina Niemetz [Sat, 18 May 2019 22:13:00 +0000 (15:13 -0700)]
FP: Fix regression test and enable SymFPU on Travis. (#3013)

5 years agoUpdate QF_NIA strategy (#3012)
Andrew Reynolds [Sat, 18 May 2019 04:07:48 +0000 (23:07 -0500)]
Update QF_NIA strategy (#3012)

5 years ago[SMT-COMP2019] Better strings configuration (#3010)
Andres Noetzli [Sat, 18 May 2019 03:35:27 +0000 (20:35 -0700)]
[SMT-COMP2019] Better strings configuration (#3010)

5 years agoSupport for incremental bit-blasting with CaDiCaL (#3006)
Andres Noetzli [Sat, 18 May 2019 02:16:55 +0000 (19:16 -0700)]
Support for incremental bit-blasting with CaDiCaL (#3006)

This commit adds support for eager bit-blasting with CaDiCaL on
incremental benchmarks. Since not all CaDiCaL versions support
incremental solving, the commit adds a CMake check that checks whether
`CaDiCaL::Solver::assume()` exists.

Note: The check uses `check_cxx_source_compiles`, which is not very
elegant but I could not find a better solution (e.g.
`check_cxx_symbol_exists()` does not seem to support methods in classes
and `check_struct_has_member()` only seems to support data members).

5 years agoFix BV ITE rewrite (#3004)
Andres Noetzli [Sat, 18 May 2019 01:47:09 +0000 (18:47 -0700)]
Fix BV ITE rewrite (#3004)

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.

5 years agoAdd the problematic input from issue 2183 as a regression test (#3008)
Martin [Fri, 17 May 2019 23:10:19 +0000 (00:10 +0100)]
Add the problematic input from issue 2183 as a regression test (#3008)

Although CVC4's behaviour is actually correct, this is to make
things a bit clearer and prevent confusion in the future.

5 years agoFix iterators in Java API (#3000)
Andres Noetzli [Thu, 16 May 2019 00:18:48 +0000 (00:18 +0000)]
Fix iterators in Java API (#3000)

Fixes #2989. SWIG 3 seems to have an issue properly resolving
`T::const_iterator::value_type` if that type itself is a `typedef`.
This is for example the case in the `UnsatCore` class, which `typedef`s
`const_iterator` to `std::vector<Expr>::const_iterator`. As a
workaround, this commit changes the `JavaIteratorAdapter` class to take
two template parameters, one of which is the `value_type`. The commit
also adds a compile-time assertion that `T::const_iterator::value_type`
can be converted to `value_type` to avoid nasty surprises. A nice
side-effect of this solution is that explicit `typemap`s are not
necessary anymore, so they are removed. Additionally, the commit adds a
`toString()` method for the Java API of `UnsatCore` and adds examples
that show and test the iteration over the unsat core and the statistics.
Iterating over `Statistics` now returns instances of `Statistic` instead
of `Object[]`, which is a bit cleaner and requires less glue code.

5 years agocmake: Install JAR and JNI files for Java bindings. (#3002)
Mathias Preiner [Wed, 15 May 2019 23:26:06 +0000 (16:26 -0700)]
cmake: Install JAR and JNI files for Java bindings. (#3002)

Default install paths are:
  - libcvc4jni.so in /usr/lib/
  - CVC4.jar in /usr/share/java/cvc4

Fixes #2990.

5 years ago BV: Do not enable abstraction when eager bit-blasting by default. (#3001)
Aina Niemetz [Wed, 15 May 2019 20:29:00 +0000 (13:29 -0700)]
 BV: Do not enable abstraction when eager bit-blasting by default. (#3001)

5 years agoFix model of Boolean vars with eager bit-blaster (#2998)
Andres Noetzli [Wed, 15 May 2019 17:38:04 +0000 (17:38 +0000)]
Fix model of Boolean vars with eager bit-blaster (#2998)

When bit-blasting eagerly, we were not assigning values to the Boolean
variables in the `TheoryModel`. With eager bit-blasting, the BV SAT
solver gets all (converted) terms, including the Boolean ones, so
`EagerBitblaster::collectModelInfo()` is responsible for assigning
values to Boolean variables. However, it has only been assigning values
to bit-vector variables, which lead to wrong models. This commit fixes
the issue by asking the `CnfStream` for the Boolean variables, querying
the SAT solver for their value, and assigning them in the `TheoryModel`.

5 years agoFix printing of bvurem (#2963)
Andrew Reynolds [Wed, 15 May 2019 16:41:03 +0000 (11:41 -0500)]
Fix printing of bvurem (#2963)

5 years agoDisable relational triggers (#2994)
Andrew Reynolds [Fri, 10 May 2019 15:51:24 +0000 (10:51 -0500)]
Disable relational triggers (#2994)

5 years agoFixes for relational triggers (#2967)
Andrew Reynolds [Thu, 9 May 2019 14:33:22 +0000 (09:33 -0500)]
Fixes for relational triggers (#2967)

5 years agoAdd support for re.all (#2980)
Andres Noetzli [Mon, 6 May 2019 13:05:19 +0000 (06:05 -0700)]
Add support for re.all (#2980)

5 years agoSimple optimizations to core strings theory. (#2988)
Andrew Reynolds [Thu, 2 May 2019 13:35:42 +0000 (08:35 -0500)]
Simple optimizations to core strings theory. (#2988)

5 years agoFix re-elim-agg regressions (#2987)
Andrew Reynolds [Wed, 1 May 2019 17:28:08 +0000 (12:28 -0500)]
Fix re-elim-agg regressions (#2987)

5 years ago Use total versions of div/mod in re-elim-agg (#2986)
Andrew Reynolds [Wed, 1 May 2019 05:35:14 +0000 (00:35 -0500)]
 Use total versions of div/mod in re-elim-agg (#2986)

5 years agoFix concat-find regexp elimination (#2983)
Andres Noetzli [Tue, 30 Apr 2019 19:32:50 +0000 (12:32 -0700)]
Fix concat-find regexp elimination (#2983)

5 years agoRemove stoi solve rewrite (#2985)
Andrew Reynolds [Tue, 30 Apr 2019 19:11:16 +0000 (14:11 -0500)]
Remove stoi solve rewrite (#2985)

5 years agoFix use of APPLY kind in examples (#2984)
Andres Noetzli [Tue, 30 Apr 2019 11:12:47 +0000 (04:12 -0700)]
Fix use of APPLY kind in examples (#2984)

5 years agoEliminate APPLY kind (#2976)
Andrew Reynolds [Tue, 30 Apr 2019 01:27:20 +0000 (20:27 -0500)]
Eliminate APPLY kind (#2976)

5 years agoOptimization for evaluation with unfolding (#2979)
Andrew Reynolds [Mon, 29 Apr 2019 21:40:31 +0000 (16:40 -0500)]
Optimization for evaluation with unfolding (#2979)

5 years agoNew C++ API: Clean up API: mkVar vs mkConst vs mkBoundVar. (#2977)
Aina Niemetz [Fri, 26 Apr 2019 01:02:57 +0000 (18:02 -0700)]
New C++ API: Clean up API: mkVar vs mkConst vs mkBoundVar. (#2977)

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).

5 years agoFix compiler warning. (#2975)
Aina Niemetz [Thu, 25 Apr 2019 03:10:47 +0000 (20:10 -0700)]
Fix compiler warning. (#2975)

5 years agoDo not use __ prefix for header guards. (#2974)
Mathias Preiner [Wed, 24 Apr 2019 22:39:24 +0000 (15:39 -0700)]
Do not use __ prefix for header guards. (#2974)

Fixes 2887.

5 years agoDco fix (#2973)
Clark Barrett [Wed, 24 Apr 2019 21:39:08 +0000 (14:39 -0700)]
Dco fix (#2973)

5 years agoREADME: Remove project leaders, history.
Aina Niemetz [Wed, 24 Apr 2019 18:46:33 +0000 (11:46 -0700)]
README: Remove project leaders, history.

5 years agoCONTRIBUTING: Fix project leaders link.
Aina Niemetz [Wed, 24 Apr 2019 18:39:12 +0000 (11:39 -0700)]
CONTRIBUTING: Fix project leaders link.

5 years ago[BV] An option for SAT proof optimization (#2915)
Alex Ozdemir [Tue, 23 Apr 2019 22:58:57 +0000 (15:58 -0700)]
[BV] An option for SAT proof optimization (#2915)

* [BV] An option for SAT proof optimization

The option doesn't **do** anything yet, but exists.

* CopyPaste Fix: BvOptimizeSatProof documentation

It was the documentation for a different option. Now it has been
updated.

* Fix Typos per Mathias' review.

Co-Authored-By: alex-ozdemir <aozdemir@hmc.edu>
5 years agoRefactor normal forms in strings (#2897)
Andrew Reynolds [Tue, 23 Apr 2019 18:40:27 +0000 (13:40 -0500)]
Refactor normal forms in strings (#2897)

5 years agoAdd CONTRIBUTING file. (#2968)
Aina Niemetz [Mon, 22 Apr 2019 23:32:25 +0000 (16:32 -0700)]
Add CONTRIBUTING file. (#2968)

5 years agoFail fast strategy for propagating instances (#2939)
Andrew Reynolds [Thu, 18 Apr 2019 19:45:39 +0000 (14:45 -0500)]
Fail fast strategy for propagating instances (#2939)

5 years ago Less aggressive caching in equality engine when proofs are enabled (#2964)
Andrew Reynolds [Thu, 18 Apr 2019 19:07:49 +0000 (14:07 -0500)]
 Less aggressive caching in equality engine when proofs are enabled (#2964)

5 years agoCache explanations in the equality engine (#2937)
Andrew Reynolds [Wed, 17 Apr 2019 21:35:51 +0000 (16:35 -0500)]
Cache explanations in the equality engine (#2937)

5 years agoMore use of isClosure (#2959)
Andrew Reynolds [Wed, 17 Apr 2019 17:42:11 +0000 (12:42 -0500)]
More use of isClosure  (#2959)

5 years agoFix extended function decomposition (#2960)
Andrew Reynolds [Wed, 17 Apr 2019 15:26:46 +0000 (10:26 -0500)]
Fix extended function decomposition (#2960)

Fixes #2958.

The issue was: we had substr(x,0,2) in R, and the "derivable substitution" modifed this to substr(substr(x,0,2),0,2) in R, since substr(x,0,2) was the representative of x (which is a bad choice, but regardless is legal). Then decomposition inference asked "can i reduce substr(substr(x,0,2),0,2) in R"? It determines substr(substr(x,0,2),0,2) in R rewrites to substr(x,0,2) in R, which is already true. However, substr(x,0,2) in R was what we started with.

The fix makes things much more conservative: we never mark extended functions reduced based on decomposition, since there isnt a strong argument based on an ordering.

5 years agoAdd interface for term enumeration (#2956)
Andrew Reynolds [Tue, 16 Apr 2019 20:06:00 +0000 (15:06 -0500)]
Add interface for term enumeration (#2956)

5 years agoMake bv{add,mul,and,or,xor,xnor} left-associative (#2955)
Andres Noetzli [Tue, 16 Apr 2019 19:11:37 +0000 (12:11 -0700)]
Make bv{add,mul,and,or,xor,xnor} left-associative (#2955)

The most recent version of SMT-LIB defines bv{add,mul,and,or,xor,xnor}
[0, 1] as left-associative. CVC4 treats all but bvxnor as having
variable arity anyway but the arity check was too strict when using
`--strict-parsing`.  This commit changes the strict parsing check. For
bvxnor, it adds code to the parser that expands an application of bvxnor
into multiple applications of a binary bvxnor if needed.

References:
[0] http://smtlib.cs.uiowa.edu/theories-FixedSizeBitVectors.shtml (bvand,
bvor, bvadd, bvmul)
[1] http://smtlib.cs.uiowa.edu/logics-all.shtml#QF_BV (bvxor, bvxnor)

5 years agoStratify enumerative instantiation (#2954)
Andrew Reynolds [Tue, 16 Apr 2019 16:53:45 +0000 (11:53 -0500)]
Stratify enumerative instantiation (#2954)

5 years agoMinor simplifications to theory quantifiers (#2953)
Andrew Reynolds [Tue, 16 Apr 2019 15:38:35 +0000 (10:38 -0500)]
Minor simplifications to theory quantifiers (#2953)

5 years agoCheck for rt library in configuration -- support for glibc<2.17 (#2854)
makaimann [Tue, 16 Apr 2019 00:17:29 +0000 (17:17 -0700)]
Check for rt library in configuration -- support for glibc<2.17 (#2854)

This is a minor fix for systems with glibc version < 2.17. In that case, we need to link with `-lrt` according to the clock_gettime man page.

5 years agoInitial version of run scripts for SMT-COMP 2019 (#2951)
Andres Noetzli [Mon, 15 Apr 2019 22:03:00 +0000 (15:03 -0700)]
Initial version of run scripts for SMT-COMP 2019 (#2951)

For now, they are just copies of the 2018 version of the scripts.

5 years agoReferring to prerelease 1.8 (#2943)
Haniel Barbosa [Fri, 12 Apr 2019 21:16:33 +0000 (16:16 -0500)]
Referring to prerelease 1.8 (#2943)

5 years ago Eliminate Boolean ITE within terms, fixes 2947 (#2949)
Andrew Reynolds [Thu, 11 Apr 2019 18:06:08 +0000 (13:06 -0500)]
 Eliminate Boolean ITE within terms, fixes 2947 (#2949)

5 years agoRemoving references to cvc4-bugs@... (#2945)
Haniel Barbosa [Tue, 9 Apr 2019 16:14:31 +0000 (11:14 -0500)]
Removing references to cvc4-bugs@... (#2945)

5 years ago"prerelease -> release" in INSTALL (#2944)
Haniel Barbosa [Tue, 9 Apr 2019 00:55:50 +0000 (19:55 -0500)]
"prerelease -> release" in INSTALL (#2944)

5 years agoFix email address of the bugs email list and delete obsolete RELEASE-NOTES.
Aina Niemetz [Tue, 9 Apr 2019 00:11:57 +0000 (17:11 -0700)]
Fix email address of the bugs email list and delete obsolete RELEASE-NOTES.

5 years agofix copyright year in configuration file (#2942)
Haniel Barbosa [Mon, 8 Apr 2019 16:26:58 +0000 (11:26 -0500)]
fix copyright year in configuration file (#2942)

5 years agoprerelease -> release (#2941)
Haniel Barbosa [Fri, 5 Apr 2019 21:02:41 +0000 (16:02 -0500)]
prerelease -> release (#2941)

5 years agoFix another corner case of datatypes+PBE (#2938)
Andrew Reynolds [Fri, 5 Apr 2019 20:31:20 +0000 (15:31 -0500)]
Fix another corner case of datatypes+PBE (#2938)

5 years agofix fp issue (#2940)
Haniel Barbosa [Fri, 5 Apr 2019 19:01:33 +0000 (14:01 -0500)]
fix fp issue (#2940)

5 years agoSatClauseSetHashFunction (#2916)
Alex Ozdemir [Fri, 5 Apr 2019 17:03:05 +0000 (10:03 -0700)]
SatClauseSetHashFunction (#2916)

* SatClauseHashFunction

Added to the same file as SatLiteralHashFunction.

* clang-format

Thanks Andres!

5 years agoadding sygus news (#2934)
Haniel Barbosa [Thu, 4 Apr 2019 18:30:27 +0000 (13:30 -0500)]
adding sygus news (#2934)

5 years agoIgnoring FP benchmarks with "unsafe" sizes unless option (#2931)
Haniel Barbosa [Thu, 4 Apr 2019 17:31:21 +0000 (12:31 -0500)]
Ignoring FP benchmarks with "unsafe" sizes unless option (#2931)

5 years agoUpdate release notes and lib version (#2933)
Haniel Barbosa [Thu, 4 Apr 2019 02:06:25 +0000 (21:06 -0500)]
Update release notes and lib version (#2933)

5 years agoUpdate copyright headers.
Aina Niemetz [Wed, 3 Apr 2019 22:54:55 +0000 (15:54 -0700)]
Update copyright headers.

5 years agoget-authors: Add GitHub user ayveejay -> Andrew V. Jones.
Aina Niemetz [Wed, 3 Apr 2019 22:53:49 +0000 (15:53 -0700)]
get-authors: Add GitHub user ayveejay -> Andrew V. Jones.

5 years agoFix combination of datatypes + strings in PBE (#2930)
Andrew Reynolds [Wed, 3 Apr 2019 20:53:52 +0000 (15:53 -0500)]
Fix combination of datatypes + strings in PBE (#2930)

5 years agoFP: Fix wrong model due to partial assignment (#2910)
Andres Noetzli [Mon, 1 Apr 2019 22:07:05 +0000 (15:07 -0700)]
FP: Fix wrong model due to partial assignment (#2910)

For a simple query `(not (= (fp.isSubnormal x) false))`, we were getting
a wrong model. The issue was that `(sign x)` was not assigned a value
and did not appear in the shared terms. In
`TheoryFp::collectModelInfo()`, however, we generate an expression that
connects the components of `x` to `x`, which contains `(sign x)`. As a
result, the normalization while building a model did not result in a
constant. This commit fixes the issue by marking `(sign x)` (and
`(significand x)`) as assignable. Assignable terms can take any value
while building a model if there is no existing value.

5 years agoFix RewriteITEBv to ensure rewrite to fixpoint (#2878)
Andres Noetzli [Mon, 1 Apr 2019 21:26:23 +0000 (14:26 -0700)]
Fix RewriteITEBv to ensure rewrite to fixpoint (#2878)

`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.

5 years agoUpdate includes to use cvc4 top-level directory in examples (#2877)
makaimann [Mon, 1 Apr 2019 20:22:04 +0000 (13:22 -0700)]
Update includes to use cvc4 top-level directory in examples (#2877)

Because the headers are now installed in a `cvc4` directory, the examples need to include from there as well.

5 years agoMove slow string regression to regress3 (#2913)
Andres Noetzli [Mon, 1 Apr 2019 17:45:40 +0000 (10:45 -0700)]
Move slow string regression to regress3 (#2913)

5 years agoModify strategy in sets+cardinality (#2909)
Andrew Reynolds [Mon, 1 Apr 2019 15:36:38 +0000 (10:36 -0500)]
Modify strategy in sets+cardinality (#2909)

5 years agoApply empty splits more aggressively in sets+cardinality (#2907)
Andrew Reynolds [Fri, 29 Mar 2019 13:38:30 +0000 (08:38 -0500)]
Apply empty splits more aggressively in sets+cardinality (#2907)

5 years agoremoving deprecated rewriting signature / example (#2906)
Haniel Barbosa [Fri, 29 Mar 2019 05:02:03 +0000 (00:02 -0500)]
removing deprecated rewriting signature / example (#2906)

5 years agoFix freeing nodes with maxed refcounts (#2903)
Andres Noetzli [Fri, 29 Mar 2019 04:02:37 +0000 (21:02 -0700)]
Fix freeing nodes with maxed refcounts (#2903)

5 years agoFix issues in cvc parser (#2901)
Andrew Reynolds [Fri, 29 Mar 2019 03:21:34 +0000 (22:21 -0500)]
Fix issues in cvc parser (#2901)

5 years agofix ex_bv.plf (#2905)
Haniel Barbosa [Thu, 28 Mar 2019 23:30:50 +0000 (18:30 -0500)]
fix ex_bv.plf (#2905)

5 years agoUpdate copyright headers.
Aina Niemetz [Tue, 26 Mar 2019 18:33:55 +0000 (11:33 -0700)]
Update copyright headers.

5 years agoupdate-copyright: Update to 2019.
Aina Niemetz [Tue, 26 Mar 2019 18:11:56 +0000 (11:11 -0700)]
update-copyright: Update to 2019.

5 years agoget-authors: Exclude empty lines.
Mathias Preiner [Tue, 26 Mar 2019 18:22:21 +0000 (11:22 -0700)]
get-authors: Exclude empty lines.

5 years agoFix warnings about wrong line numbers (#2899)
Andres Noetzli [Tue, 26 Mar 2019 15:28:09 +0000 (08:28 -0700)]
Fix warnings about wrong line numbers (#2899)

5 years agoFix a few warnings (#2898)
Andrew Reynolds [Tue, 26 Mar 2019 15:03:29 +0000 (10:03 -0500)]
Fix a few warnings (#2898)

5 years agoget-authors: Exclude common source code patterns. (#2900)
Mathias Preiner [Tue, 26 Mar 2019 01:19:45 +0000 (18:19 -0700)]
get-authors: Exclude common source code patterns. (#2900)

Exclude lines that #include header files and define namespaces.
Since we use git blame -C -M to determine the current top contributors,
git tries to match all #include and namespace definitions to an original
author, which is not accurate since these lines are usually not
copied over from other files.

5 years agoupdate-copyright: Fix matching of excluded paths.
Aina Niemetz [Mon, 25 Mar 2019 19:31:59 +0000 (12:31 -0700)]
update-copyright: Fix matching of excluded paths.

5 years agoget-authors: Readd option -C to git blame command.
Aina Niemetz [Mon, 25 Mar 2019 18:39:17 +0000 (11:39 -0700)]
get-authors: Readd option -C to git blame command.

5 years ago Split regular expression solver (#2891)
Andrew Reynolds [Sun, 24 Mar 2019 19:26:25 +0000 (14:26 -0500)]
 Split regular expression solver (#2891)

5 years agoNew C++ API: Fix include. (#2896)
Aina Niemetz [Sun, 24 Mar 2019 18:46:36 +0000 (11:46 -0700)]
New C++ API: Fix include. (#2896)

5 years agoBV: Fix typerules for rotate operators. (#2895)
Aina Niemetz [Sun, 24 Mar 2019 05:58:31 +0000 (22:58 -0700)]
BV: Fix typerules for rotate operators. (#2895)

5 years agoFix memory leak when using subsolvers (#2893)
Andres Noetzli [Sat, 23 Mar 2019 20:30:35 +0000 (13:30 -0700)]
Fix memory leak when using subsolvers (#2893)

ASAN was reporting memory leaks in regression tests that were using
subsolvers. First, I am going to describe the origin of the leaks and
then the solution implemented in this commit.

Recall an `Expr` stores the `NodeManager` that the internal node is
associated with. `Node::toExpr()` converts a `Node` to an `Expr` and
assumes that the active `NodeManager` (returned by
`NodeManager::currentNM()` is the one associated with the node. In
`ExportPrivate::exportInternal()`, when we were exporting a skolem, we
created a skolem in the target `NodeManager` by calling
`NodeManager::mkSkolem()` (`ExprManager`s do not support the creation of
skolems) but then we called `Node::toExpr()` on the resulting skolem
while the origin `NodeManager` was the active `NodeManager`. One of the
issues of having the wrong `NodeManager` in the `Expr` is that when the
`Expr` is destroyed and the internal node's refcount reaches zero in
destructor of `Expr`, then the node value associated with the node is
added to the set of zombie nodes (nodes waiting to be garbage collected
or resurrected) of the wrong `NodeManager`. The problem here is that the
set of zombie nodes uses the node id to hash and compare nodes. Node
ids, however, are only unique within a given `NodeManager`. Thus, if we
have two nodes with the same id from different `NodeManager`s and both
reach refcount zero in the context of the same `NodeManager`, only one
of them will end up in the set of zombies and thus only that one will be
freed.
Using a subsolver realiably triggered this issue.
`ExportPrivate::exportInternal()` stored the `Expr` with the wrong
`NodeManager` in an `ExprManagerMapCollection` which associates
variables in the original `ExprManager` with the variables in the target
`ExprManager`. When we created a subsolver, we created the
`ExprManagerMapCollection` before creating our subsolver, so it was
deleted after the subsolver and so deleting the
`ExprManagerMapCollection` deleted the last reference to `Expr`s holding
skolem nodes associated with the wrong `NodeManager`.

This commit fixes the issue by making sure that the correct
`NodeManager` is in scope when converting the skolem/bound variable
nodes to an `Expr`. It also swaps the creation order of
`ExprManagerMapCollection` and `ExprManager` to make sure that
`ExprManagerMapCollection` is deleted before the `ExprManager` that the
`Expr`s belong to. Additionally, the commit makes it harder to make a
similar mistake by asserting that the `Expr`s in the
`ExprManagerMapCollection` are associated with the expected
`ExprManager`s. Finally, it adds an assertion that tries to identify
such issues by checking whether the list of zombies contains a node with
the same id but located at a different address.

5 years agoStrip non-matching beginning from indexof operator (#2885)
Andres Noetzli [Sat, 23 Mar 2019 00:15:53 +0000 (00:15 +0000)]
Strip non-matching beginning from indexof operator (#2885)

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.

5 years agoRevisit strings extended function decomposition (#2892)
Andrew Reynolds [Fri, 22 Mar 2019 21:24:05 +0000 (16:24 -0500)]
Revisit strings extended function decomposition  (#2892)

5 years agoFix instantiation stat for fmf (#2889)
Andrew Reynolds [Fri, 22 Mar 2019 20:28:50 +0000 (15:28 -0500)]
Fix instantiation stat for fmf (#2889)

5 years agoMore fixes for PBE with datatypes (#2882)
Andrew Reynolds [Fri, 22 Mar 2019 14:01:13 +0000 (09:01 -0500)]
More fixes for PBE with datatypes (#2882)

5 years agofix help information on TPTP parsing (#2884)
Haniel Barbosa [Fri, 22 Mar 2019 06:11:06 +0000 (01:11 -0500)]
fix help information on TPTP parsing (#2884)

5 years agoFix stripConstantEndpoints in strings rewriter (#2883)
Andres Noetzli [Fri, 22 Mar 2019 03:48:56 +0000 (03:48 +0000)]
Fix stripConstantEndpoints in strings rewriter (#2883)

`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.

5 years agoUse empty vector instead of false in query with null Expr assumption (#2876)
makaimann [Fri, 22 Mar 2019 01:10:01 +0000 (18:10 -0700)]
Use empty vector instead of false in query with null Expr assumption (#2876)

This solution is less confusing than using a `false` assumption.

5 years ago Fix bad comparison in RE solver's addMembership (#2880)
Andrew Reynolds [Thu, 21 Mar 2019 19:21:39 +0000 (14:21 -0500)]
 Fix bad comparison in RE solver's addMembership (#2880)

5 years agoRewrite selectors correctly applied to constructors (#2875)
Andrew Reynolds [Thu, 21 Mar 2019 18:41:46 +0000 (13:41 -0500)]
Rewrite selectors correctly applied to constructors (#2875)

5 years agoAdd more NEWS (#2859)
Andres Noetzli [Thu, 21 Mar 2019 17:21:02 +0000 (17:21 +0000)]
Add more NEWS (#2859)

5 years agoSygus abduction feature (#2744)
Andrew Reynolds [Wed, 20 Mar 2019 01:54:40 +0000 (20:54 -0500)]
Sygus abduction feature (#2744)

5 years agoMake declare-datatype(s) a standard, non-extended command in the Smt2 parser. (#2874)
Andrew Reynolds [Tue, 19 Mar 2019 19:15:24 +0000 (14:15 -0500)]
Make declare-datatype(s) a standard, non-extended command in the Smt2 parser. (#2874)

5 years agoFix fairness issue with fast sygus enumerator (#2873)
Andrew Reynolds [Tue, 19 Mar 2019 16:51:11 +0000 (11:51 -0500)]
Fix fairness issue with fast sygus enumerator (#2873)

5 years agoNew C++: Remove redundant mkBoundVar function.
Aina Niemetz [Mon, 18 Mar 2019 22:58:43 +0000 (15:58 -0700)]
New C++: Remove redundant mkBoundVar function.

5 years agoNew C++: Remove redundant mkVar function.
Aina Niemetz [Mon, 18 Mar 2019 22:05:00 +0000 (15:05 -0700)]
New C++: Remove redundant mkVar function.

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