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This corrects a bug that was introduced in #2266 (the hack removed there was necessary).
This ensures that we handle operators like bvudiv, bvsdiv, bvurem, div, rem, / properly in sygus.
This also enables total semantics for BV div-by-zero for sygus.
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The rewriter for lambda is currently too aggressive, there are cases like:
lambda xy. x = y
that are converted into an array representation that when indexing based on x gives (store y true false), which is subsequently converted to:
lambda fv_1 fv_2. fv_1 = y
where fv_1 and fv_2 are canonical free variables. Here, y is used as index but was not substituted hence is incorrectly made free.
To make things simpler, this PR disables any rewriting for lambda unless the array representation of the lambda is a constant, which hardcodes/simplifies a previous argument (reqConst=true). This fixes a sygus issue I ran into yesterday (regression added in this PR).
Some parts of the code were formatted as a result.
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Until now, regression tests were split across tens of different
Makefile.am, which required a lot of code duplication and does not
really seem to be in the spirit of automake. If we want to change the
LOG_COMPILER/LOG_DRIVER for example, we have to change every single
Makefile.am, which is cumbersome (I was able to get something
semi-working by exporting those variables but it didn't seem very
clean). Additionally, it made the output of the regression tests fairly
verbose and split the output across multiple log files. Finally
it also limited parallelism when running the regression tests (this fix lowers
the time it takes to run regression level 1 from 3m to 1m45s on my
machine with 16 threads).
This commit moves all the regression tests into
test/regress/Makefile.tests and changes test/regress/Makefile.am to deal
with this new structure. Finally, it changes how the test summary in
test/Makefile.am is produced: instead of relying on the log files for
the subdirectories, it greps for the test results in the log files of
the individual tests. Not the most elegant solution but we should
probably anyway delegate that task to a Python script at some point.
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* Initial work on conjecture-specific symmetry breaking.
* More infrastructure, working on process term.
* Flattening.
* Process defs
* More setup
* Fixes.
* Sketching
* Generalize to inference of argument definitions.
* More, separate conjunct processing per synth function.
* Single occurrence variables.
* Assign relevance.
* Document, connecting.
* Connecting to grammar construction.
* Enabled, add regressions.
* Fix regressions.
* Clang format.
* Add regress1, minor.
* Fix
* Two passes.
* Fix
* Note
* Improve check match, make single var occurrence more conservative.
* Add regression.
* Clang format
* Minor comments
* Update regression to new option.
* Undo grammar cons changes.
* Enable irrelevant args.
* Improvements.
* Format
* Minor
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* Remove front end hack for sygus.
* Remove other hack, add sygus solution output mode.
* Clang format
* Minor
* Fix
* Minor
* Remove unused field.
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* Represent sygus synthesis conjectures using higher-order quantification, remove associated hacks.
* Minor fix
* Fix bug in Node::hasBoundVar for non-ground operators.
* Add regression.
* Address review.
* Apply clang format.
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* Allow any smt2 logic to be a sygus logic. Add non-linear SyGuS regressions.
* Minor
* Add case for reals, comment.
* Fix regress1.
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decision procedure to share selectors of the same type across multiple constructors. Major rewrite of the SyGuS solver. Adds several new strategies for I/O example problems (PBE) and invariant synthesis. Major simplifications to sygus parsing and synthesis conjecture representation. Do not support check-synth in portfolio. Add sygus regressions.
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