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more seq overhaul

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-18 17:32:28 -07:00
parent 76735476d4
commit a9c4984a16
13 changed files with 1888 additions and 1860 deletions
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11
src/smt/seq_skolem.cpp
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@ -136,13 +136,18 @@ bool seq_skolem::is_step(expr* e, expr*& s, expr*& idx, expr*& re, expr*& i, exp
}
}
bool seq_skolem::is_tail(expr* e, expr*& s, unsigned& idx) const {
bool seq_skolem::is_tail_u(expr* e, expr*& s, unsigned& idx) const {
expr* i = nullptr;
rational r;
return is_tail_match(e, s, i) && a.is_numeral(i, r) && r.is_unsigned() && (idx = r.get_unsigned(), true);
return is_tail(e, s, i) && a.is_numeral(i, r) && r.is_unsigned() && (idx = r.get_unsigned(), true);
}
bool seq_skolem::is_tail_match(expr* e, expr*& s, expr*& idx) const {
bool seq_skolem::is_tail(expr* e, expr*& s) const {
expr* i = nullptr;
return is_tail(e, s, i);
}
bool seq_skolem::is_tail(expr* e, expr*& s, expr*& idx) const {
return is_tail(e) && (s = to_app(e)->get_arg(0), idx = to_app(e)->get_arg(1), true);
}