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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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This commit adds a check to make sure that the result of a `(check-sat)`
call matches the expected result set via `(set-info :status ...)`. In
doing so, it also fixes an issue where CVC4 would crash if asked for the
unsat core after setting the status to `unsat` but before calling
`(check-sat)` (see regression for concrete example). This happened
because CVC4 was storing the expected result and the computed result
both in the same variable (the expected result wasn't really being used
though). This commit keeps track of the expected result and the computed
result in separate variables to fix that issue.
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initialized (#2708)
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This includes several improvements for cegqi with arithmetic:
- Randomly choose either lower or upper bounds instead of always using lower bounds (this is similar to cegqi+BV),
- Equalities are handled by processAssertions,
- Resort to *only* model values at full effort instead of trying to mix model values/bounds (this is also similar to cegqi+BV),
- cegqi+arithmetic does not try multiple instantiations unless the flag cbqiMultiInst is set. This makes it so that ceg_instantiator does not have exponential behavior when the strategy is non-monotonic.
It also includes a core fix to computing what bound is optimal based on an ordering that incorporates virtual terms. Previously, we would consider, e.g.:
`a+b*delta > c+d*delta if a>=c and b>=d`
Whereas the correct check is lexicographic:
`a+b*delta > c+d*delta if a>c or a=c and b>d`
This means e.g. 2+(-1)*delta > 3 was previously wrongly inferred.
This is part of merging https://github.com/ajreynol/CVC4/tree/cegqiSingleInst, which is +3-0 on SMTLIB BV and +12-9 on SMTLIB LIA+LRA+NRA+NIA.
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(#1806)
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Disabling proof checking/unsat core checking for the two benchmarks in
question, reduces the time to run regressions significantly. After the
change, regression level 2 takes 7m30s to run on my machine and
regression level 1 takes just below 3m (16 threads). Individually, the
tests take over 7m each when checking proofs/unsat cores, so they add
significant overhead.
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Preprocessing pass that turns an arbitrary (e.g. smt2) input into a sygus conjecture, which is helpful for Horn clause solving.
This includes improvements to the robustness of the sygus solver.
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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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While reorganizing the regression tests, I found three tests with a
wrong status, one that CVC4 reported unknown for and some regression
tests that had command line options set in the Makefile.am instead of
the tests themselves. This commit fixes the status of the three
regression tests (verified the status with Z3), adds command line
options to make the previously "unknown" test work, and moves the
command line options from the Makefile.am into the individual regression
tests. The latter also required some minor changes to the regression
script because it would not try to determine the expected output from
the (set-info :status ...) command if there was one directive (such as
EXPECT/COMMAND-LINE/etc.). This was an issue with the tests that now
have a COMMAND-LINE directive.
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