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viable

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-07-02 11:26:05 -07:00
parent 0520180846
commit 0fc9d7ad0d
4 changed files with 256 additions and 183 deletions
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13
src/math/interval/mod_interval.h
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@ -48,12 +48,23 @@ public:
mod_interval(Numeral const& l, Numeral const& h): lo(l), hi(h) {}
static mod_interval free() { return mod_interval(0, 0); }
static mod_interval empty() { mod_interval i(0, 0); i.emp = true; return i; }
bool is_free() const { return !emp && lo == hi; }
bool is_empty() const { return emp; }
bool is_singleton() const { return !is_empty() && (lo + 1 == hi || (hi == 0 && is_max(lo))); }
bool contains(Numeral const& n) const;
virtual bool is_max(Numeral const& n) const { return n + 1 == 0; }
void set_free() { lo = hi = 0; emp = false; }
void set_bounds(Numeral const& l, Numeral const& h) { lo = l; hi = h; }
void set_empty() { emp = true; }
bool contains(Numeral const& n) const;
void intersect_ule(Numeral const& h);
void intersect_uge(Numeral const& l);
void intersect_ult(Numeral const& h);
void intersect_ugt(Numeral const& l);
void intersect_fixed(Numeral const& n);
void intersect_diff(Numeral const& n);
mod_interval operator&(mod_interval const& other) const;
mod_interval operator+(mod_interval const& other) const;
mod_interval operator-(mod_interval const& other) const;