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Treat arguments to recursive functions as beta redexes

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An argument to a recursive function would escape the scope of the function application when the recursive function definitions are unfolded. Therefore, such argument occurrences need not be considered for extensional equality / equality sharing.

This filter is mostly relevant for recursive functions that take a lambda expression as argument. Lambda expressions / arrays that occur in shared occurrences are checked for extensionality.
This commit is contained in:
Nikolaj Bjorner 2022-06-12 10:48:55 -07:00
parent 25ad5cb073
commit 637120ced5
4 changed files with 16 additions and 0 deletions
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src/smt/theory_recfun.h
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@ -99,6 +99,7 @@ namespace smt {
bool can_propagate() override;
void propagate() override;
bool should_research(expr_ref_vector &) override;
bool is_beta_redex(enode* p, enode* n) const override;
void new_eq_eh(theory_var v1, theory_var v2) override {}
void new_diseq_eh(theory_var v1, theory_var v2) override {}