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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
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/*++
Copyright (c) 2011 Microsoft Corporation
Module Name:
aig.h
Abstract:
And-inverted graphs
Author:
Leonardo (leonardo) 2011-05-13
Notes:
--*/
#ifndef _AIG_H_
#define _AIG_H_
#include"ast.h"
#include"tactic_exception.h"
class assertion_set;
class goal;
class aig_lit;
class aig_manager;
class aig_exception : public tactic_exception {
public:
aig_exception(char const * msg):tactic_exception(msg) {}
};
class aig_ref {
friend class aig_lit;
friend class aig_manager;
aig_manager * m_manager;
void * m_ref;
aig_ref(aig_manager & m, aig_lit const & l);
public:
aig_ref();
~aig_ref();
aig_ref & operator=(aig_ref const & r);
bool operator==(aig_ref const & r) const { return m_ref == r.m_ref; }
bool operator!=(aig_ref const & r) const { return m_ref != r.m_ref; }
};
class aig_manager {
struct imp;
imp * m_imp;
friend class aig_ref;
public:
// If default_gate_encoding == true, then
// ite(a, b, c) is encoded as (NOT a OR b) AND (a OR c)
// iff(a, b) is encoded as (NOT a OR b) AND (a OR NOT b)
//
// If default_gate_encoding == false, then
// ite(a, b, c) is encoded as (a AND b) OR (NOT a AND c)
// iff(a, b) is encoded as (a AND b) OR (NOT a AND NOT b)
aig_manager(ast_manager & m, unsigned long long max_memory = UINT64_MAX, bool default_gate_encoding = true);
~aig_manager();
void set_max_memory(unsigned long long max);
aig_ref mk_aig(expr * n);
aig_ref mk_aig(assertion_set const & s); // TODO delete
aig_ref mk_aig(goal const & g);
aig_ref mk_not(aig_ref const & r);
aig_ref mk_and(aig_ref const & r1, aig_ref const & r2);
aig_ref mk_or(aig_ref const & r1, aig_ref const & r2);
aig_ref mk_iff(aig_ref const & r1, aig_ref const & r2);
aig_ref mk_ite(aig_ref const & r1, aig_ref const & r2, aig_ref const & r3);
void max_sharing(aig_ref & r);
void to_formula(aig_ref const & r, assertion_set & s); // TODO delete
void to_formula(aig_ref const & r, expr_ref & result);
void to_formula(aig_ref const & r, goal & result);
void to_cnf(aig_ref const & r, goal & result);
void display(std::ostream & out, aig_ref const & r) const;
void display_smt2(std::ostream & out, aig_ref const & r) const;
unsigned get_num_aigs() const;
void cancel() { set_cancel(true); }
void reset_cancel() { set_cancel(false); }
void set_cancel(bool f);
};
#endif