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author | Andres Noetzli <andres.noetzli@gmail.com> | 2020-04-03 14:52:45 -0700 |
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committer | GitHub <noreply@github.com> | 2020-04-03 14:52:45 -0700 |
commit | aeede74491d1db9c5bac771e78b79934ca4ab552 (patch) | |
tree | a3c05a53702514520b9625b30995e7d789c39982 /src/theory/strings/theory_strings.h | |
parent | badc9cb00c9086b9303fab1b494e9c5eb88265ec (diff) |
Update theory rewriter ownership, add stats to strings (#4202)
This commit adds statistics for string rewrites. This is work towards proof
support in the string solver. At a high level, this commit adds a pointer to a
`SequenceStatistics` in the rewriters and modifies
`SequencesRewriter::returnRewrite()` to count the rewrites done. In practice,
to make this work requires a couple of changes, some of them temporary:
- We can't have a single `Rewriter` instance shared between different
`SmtEngine` instances anymore. Thus the `Rewriter` is now owned by the
`SmtEngine` and calling the rewriter retrieves the rewriter associated with
the current `SmtEngine`. This is a temporary workaround before we get rid of
singletons.
- Methods in the `SequencesRewriter` and the `StringsRewriter` are made
non-`static` because they need access to the statistics instance.
- `StringsEntail` now has non-`static` methods because it needs a reference to
the sequences rewriter that it can call.
- The interaction between the `StringsRewriter` and the `SequencesRewriter`
changed: the `StringsRewriter` is now a proper `TheoryRewriter` that inherits
from `SequencesRewriter` and calls its `postRewrite()` before applying its
own rewrites (this is essentially a reversal of roles from before: the
`SequencesRewriter` used to call `static` methods in the `StringsRewriter`).
- The theory rewriters are now owned by the individual theories. This design
mirrors the `EqualityEngine`s owned by the individual theories.
Diffstat (limited to 'src/theory/strings/theory_strings.h')
-rw-r--r-- | src/theory/strings/theory_strings.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/theory/strings/theory_strings.h b/src/theory/strings/theory_strings.h index 0e95628bc..5ae0ac7a9 100644 --- a/src/theory/strings/theory_strings.h +++ b/src/theory/strings/theory_strings.h @@ -39,6 +39,7 @@ #include "theory/strings/skolem_cache.h" #include "theory/strings/solver_state.h" #include "theory/strings/strings_fmf.h" +#include "theory/strings/strings_rewriter.h" #include "theory/theory.h" #include "theory/uf/equality_engine.h" @@ -109,7 +110,7 @@ class TheoryStrings : public Theory { const LogicInfo& logicInfo); ~TheoryStrings(); - std::unique_ptr<TheoryRewriter> mkTheoryRewriter() override; + TheoryRewriter* getTheoryRewriter() override { return &d_rewriter; } void setMasterEqualityEngine(eq::EqualityEngine* eq) override; @@ -352,6 +353,9 @@ private: // Symbolic Regular Expression private: + /** The theory rewriter for this theory. */ + StringsRewriter d_rewriter; + /** * The base solver, responsible for reasoning about congruent terms and * inferring constants for equivalence classes. |