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state invariants are now converted into AIG state constraints #478

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Merged
merged 1 commit into from
May 2, 2024
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state invariants are now converted into AIG state constraints #478

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22 changes: 18 additions & 4 deletions src/trans-netlist/trans_to_netlist.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ Author: Daniel Kroening, kroening@kroening.com
#include <util/arith_tools.h>
#include <util/bitvector_expr.h>
#include <util/ebmc_util.h>
#include <util/expr_util.h>
#include <util/mathematical_expr.h>
#include <util/namespace.h>
#include <util/std_expr.h>
Expand All @@ -25,6 +26,8 @@ Author: Daniel Kroening, kroening@kroening.com
#include "instantiate_netlist.h"
#include "netlist.h"

#include <algorithm>

/*******************************************************************\

Class: convert_trans_to_netlistt
Expand Down Expand Up @@ -78,8 +81,9 @@ class convert_trans_to_netlistt:public messaget

typedef std::list<exprt> constraint_listt;
constraint_listt constraint_list;
bvt transition_constraints;


bvt invar_constraints, transition_constraints;

class rhst
{
public:
Expand Down Expand Up @@ -299,7 +303,10 @@ void convert_trans_to_netlistt::operator()(const irep_idt &module)

// do the remaining transition constraints
convert_constraints(aig_prop);


dest.constraints.insert(
dest.constraints.end(), invar_constraints.begin(), invar_constraints.end());

dest.transition.insert(
dest.transition.end(),
transition_constraints.begin(),
Expand Down Expand Up @@ -402,6 +409,9 @@ Function: convert_trans_to_netlistt::convert_constraints

void convert_trans_to_netlistt::convert_constraints(propt &prop)
{
invar_constraints.reserve(
transition_constraints.size() + constraint_list.size());

transition_constraints.reserve(
transition_constraints.size()+constraint_list.size());

Expand All @@ -412,7 +422,11 @@ void convert_trans_to_netlistt::convert_constraints(propt &prop)
{
literalt l=
instantiate_convert(prop, dest.var_map, *it, ns, get_message_handler());
transition_constraints.push_back(l);

if(has_subexpr(*it, ID_next_symbol))
transition_constraints.push_back(l);
else
invar_constraints.push_back(l);
}
}

Expand Down