public AbacusInstance(AbacusMachine am, AbacusMachineState ams)
{
this.am = am;
this.ams = ams.Copy();
CurNode = 1;
Halted = false;
}
public AbacusInstance(AbacusMachine am)
{
this.am = am;
ams = new AbacusMachineState();
CurNode = 1;
Halted = false;
}