Kiln dried pine bedding and processed pine furniture in your home pose no threats to your snake. The perceived toxicity of pine is about as overblown as the unfoounded concerns over feeding snakes on loose substrate.
There are phenols in all types of wood that can be irritating to any living creature - aspen and processed paper products included. With the exception of cedar, the majority of wood bedding products are safe for your snake.
The pine bedding you see in most pet stores is almost always kiln dried. It is safe for your snakes.