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fixing bugs reported in #4518

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-07-21 15:50:19 -07:00
parent b1824fea10
commit aab50ff3f5
5 changed files with 70 additions and 12 deletions
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9
src/smt/seq_skolem.h
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@ -102,12 +102,21 @@ namespace smt {
bool is_skolem(symbol const& s, expr const* e) const;
bool is_skolem(expr const* e) const { return seq.is_skolem(e); }
bool is_first(expr* e, expr*& u) { return is_skolem(m_seq_first, e) && (u = to_app(e)->get_arg(0), true); }
bool is_last(expr* e, expr*& u) { return is_skolem(m_seq_last, e) && (u = to_app(e)->get_arg(0), true); }
bool is_unit_inv(expr* e) const { return is_skolem(symbol("seq.unit-inv"), e); }
bool is_unit_inv(expr* e, expr*& u) const { return is_unit_inv(e) && (u = to_app(e)->get_arg(0), true); }
bool is_tail(expr* e) const { return is_skolem(m_tail, e); }
bool is_seq_first(expr* e) const { return is_skolem(m_seq_first, e); }
bool is_indexof_left(expr* e) const { return is_skolem(m_indexof_left, e); }
bool is_indexof_right(expr* e) const { return is_skolem(m_indexof_right, e); }
bool is_indexof_left(expr* e, expr*& x, expr*& y) const {
return is_indexof_left(e) && (x = to_app(e)->get_arg(0), y = to_app(e)->get_arg(1), true);
}
bool is_indexof_right(expr* e, expr*& x, expr*& y) const {
return is_indexof_right(e) && (x = to_app(e)->get_arg(0), y = to_app(e)->get_arg(1), true);
}
bool is_step(expr* e) const { return is_skolem(m_aut_step, e); }
bool is_step(expr* e, expr*& s, expr*& idx, expr*& re, expr*& i, expr*& j, expr*& t) const;
bool is_accept(expr* acc) const { return is_skolem(m_accept, acc); }