sat_path_enumerator.h

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/*******************************************************************\
 
Module: Loop Acceleration
 
Author: Matt Lewis
 
\*******************************************************************/

 
#ifndef CPROVER_GOTO_INSTRUMENT_ACCELERATE_SAT_PATH_ENUMERATOR_H
#define CPROVER_GOTO_INSTRUMENT_ACCELERATE_SAT_PATH_ENUMERATOR_H
 
#include <map>
 
#include <goto-programs/goto_program.h>
 
#include <analyses/natural_loops.h>
 
#include "path_enumerator.h"
#include "path.h"
#include "cone_of_influence.h"
#include "acceleration_utils.h"
 
class sat_path_enumeratort:public path_enumeratort
{
public:
  sat_path_enumeratort(
    message_handlert &message_handler,
    symbol_table_baset &_symbol_table,
    goto_functionst &_goto_functions,
    goto_programt &_goto_program,
    natural_loops_mutablet::natural_loopt &_loop,
    goto_programt::targett _loop_header,
    guard_managert &guard_manager)
    : message_handler(message_handler),
      symbol_table(_symbol_table),
      ns(symbol_table),
      goto_functions(_goto_functions),
      goto_program(_goto_program),
      loop(_loop),
      loop_header(_loop_header),
      utils(symbol_table, message_handler, goto_functions, loop_counter),
      guard_manager(guard_manager)
  {
    find_distinguishing_points();
    build_fixed();
  }
 
  bool next(patht &path);
 
protected:
  message_handlert &message_handler;
  void find_distinguishing_points();
 
  void build_path(scratch_programt &scratch_program, patht &path);
  void build_fixed();
 
  void record_path(scratch_programt &scratch_program);
 
  symbol_table_baset &symbol_table;
  namespacet ns;
  goto_functionst &goto_functions;
  goto_programt &goto_program;
  natural_loops_mutablet::natural_loopt &loop;
  goto_programt::targett loop_header;
 
  typedef std::
    map<goto_programt::targett, exprt, goto_programt::target_less_than>
      distinguish_mapt;
  typedef std::map<exprt, bool> distinguish_valuest;
 
  acceleration_utilst utils;
  guard_managert &guard_manager;
  exprt loop_counter;
  distinguish_mapt distinguishing_points;
  std::list<exprt> distinguishers;
  expr_sett modified;
  goto_programt fixed;
  std::list<distinguish_valuest> accelerated_paths;
};
 
#endif // CPROVER_GOTO_INSTRUMENT_ACCELERATE_SAT_PATH_ENUMERATOR_H