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add intersection using symbolic automata facility

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-28 17:05:12 -08:00
parent 4cf72e23e6
commit df2d7e7628
8 changed files with 561 additions and 28 deletions
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28
src/ast/rewriter/seq_rewriter.h
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@ -25,6 +25,7 @@ Notes:
#include"params.h"
#include"lbool.h"
#include"automaton.h"
#include"symbolic_automata.h"
class sym_expr {
enum ty {
@ -33,21 +34,24 @@ class sym_expr {
t_range
};
ty m_ty;
sort* m_sort;
expr_ref m_t;
expr_ref m_s;
unsigned m_ref;
sym_expr(ty ty, expr_ref& t, expr_ref& s) : m_ty(ty), m_t(t), m_s(s), m_ref(0) {}
sym_expr(ty ty, expr_ref& t, expr_ref& s, sort* srt) : m_ty(ty), m_sort(srt), m_t(t), m_s(s), m_ref(0) {}
public:
expr_ref accept(expr* e);
static sym_expr* mk_char(expr_ref& t) { return alloc(sym_expr, t_char, t, t); }
static sym_expr* mk_char(expr_ref& t) { return alloc(sym_expr, t_char, t, t, t.get_manager().get_sort(t)); }
static sym_expr* mk_char(ast_manager& m, expr* t) { expr_ref tr(t, m); return mk_char(tr); }
static sym_expr* mk_pred(expr_ref& t) { return alloc(sym_expr, t_pred, t, t); }
static sym_expr* mk_range(expr_ref& lo, expr_ref& hi) { return alloc(sym_expr, t_range, lo, hi); }
static sym_expr* mk_pred(expr_ref& t, sort* s) { return alloc(sym_expr, t_pred, t, t, s); }
static sym_expr* mk_range(expr_ref& lo, expr_ref& hi) { return alloc(sym_expr, t_range, lo, hi, lo.get_manager().get_sort(hi)); }
void inc_ref() { ++m_ref; }
void dec_ref() { --m_ref; if (m_ref == 0) dealloc(this); }
std::ostream& display(std::ostream& out) const;
bool is_char() const { return m_ty == t_char; }
bool is_pred() const { return !is_char(); }
bool is_range() const { return m_ty == t_range; }
sort* sort() const { return m_sort; }
expr* get_char() const { SASSERT(is_char()); return m_t; }
};
@ -58,17 +62,31 @@ public:
void dec_ref(sym_expr* s) { if (s) s->dec_ref(); }
};
class expr_solver {
public:
virtual ~expr_solver() {}
virtual lbool check_sat(expr* e) = 0;
};
typedef automaton<sym_expr, sym_expr_manager> eautomaton;
class re2automaton {
typedef boolean_algebra<sym_expr*> boolean_algebra_t;
typedef symbolic_automata<sym_expr, sym_expr_manager> symbolic_automata_t;
ast_manager& m;
sym_expr_manager sm;
seq_util u;
bv_util bv;
scoped_ptr<expr_solver> m_solver;
scoped_ptr<boolean_algebra_t> m_ba;
scoped_ptr<symbolic_automata_t> m_sa;
eautomaton* re2aut(expr* e);
eautomaton* seq2aut(expr* e);
public:
public:
re2automaton(ast_manager& m);
~re2automaton();
eautomaton* operator()(expr* e);
void set_solver(expr_solver* solver);
};
/**