Introduce value-set supported simplifier for goto-symex #8642
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tautschnig
requested review from
qinheping,
feliperodri,
remi-delmas-3000,
kroening and
peterschrammel
as code owners
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## develop #8642 +/- ##
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+ Coverage 80.37% 80.39% +0.01%
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Files 1686 1688 +2
Lines 206889 206972 +83
Branches 73 73
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+ Hits 166289 166388 +99
+ Misses 40600 40584 -16 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Move `try_evaluate_pointer_comparison` to a simplifier that can eventually support more cases than just equalities in GOTO conditions. The initial change does not alter behaviour (except that previously `try_evaluate_pointer_comparison` was even used when simplification was disabled). A side-effect is that we can also clean up renamedt.
value-set based simplifications may be helpful well outside just GOTO conditions.
When all candidates in the value set have the same offset we can replace a pointer_offset expression by the offset value found in the value set.
The value set can help us infer that, e.g., a particular pointer cannot be among the ones assigned to __CPROVER_dead_object, whereby we can simplify R_OK/W_OK expressions.
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Move
try_evaluate_pointer_comparisonto a simplifier that can eventually support more cases than just equalities in GOTO conditions. The initial change does not alter behaviour (except that previouslytry_evaluate_pointer_comparisonwas even used when simplification was disabled).A side-effect is that we can also clean up renamedt.