void add_safety_learning_variable_refs(invariant_programt &prog, const invariant_variable_idst &var_ids, const size_t max_sz) { link_user_program_variables(prog, var_ids); const symbol_tablet &st=prog.st; goto_functionst &gf=prog.gf; const size_t num_vars=var_ids.size(); const invariant_programt::const_invariant_loopst loops( static_cast<const invariant_programt &>(prog).get_loops()); for (const invariant_programt::invariant_loopt * const loop : loops) { link_result_var(st, gf, num_vars, max_sz, loop->meta_variables.Ix); link_result_var(st, gf, num_vars, max_sz, loop->meta_variables.Ix_prime); } }
void safety_learn_configt::process(const counterexamplest &ces, const size_t max_sz) { program=original_program; var_ids.clear(); const symbol_tablet &st=program.st; num_consts=get_invariant_variable_ids(st, var_ids); const size_t num_vars=var_ids.size(); null_message_handlert msg; const std::string name(DANGER_EXECUTE); add_invariant_library(program, msg, num_vars, num_consts, max_sz, name); add_safety_learning_variable_refs(program, var_ids, max_sz); goto_functionst &gf=program.gf; link_result_var(st, gf, var_ids.size(), max_sz, program.Ix0); add_invariant_progs_to_learn(program, max_sz); const invariant_programt &prog=program; const invariant_programt::const_invariant_loopst loops(prog.get_loops()); const invariant_programt::invariant_loopt &first_loop=*loops.front(); const std::string I0=get_prog_var_name(st, first_loop.meta_variables.Ix); execute_inv_prog(st, gf, max_sz, program.Ix0, I0); safety_add_learned_counterexamples(program, ces, create_safety_constraint); gf.update(); }