If you can smell pine, then the log is probably some sort of pine.
That being said, I can also see how the 1/2 log of pine would not be dangerous where the shavings would be. (Speaking in hypothetical terms, but it makes sense in my head.)
The issue with the shavings is that the resin and the fumes effect the snake. There's a lot of surface area on those shavings, and they're getting moved around in the viv by burrowing, cleaning, etc. So every time, there's some abrasion and more opportunity to release resin or fumes.
A hide is a fairly inert thing. It may offgas, but on the other hand, that may taper off over time. (I don't happen to have a log hide in the viv right now.)
I sort of thinking about asbestos in this discussion. Just having it in your house isn't the end of the world. It's accessing it and the process of removing it that is hazardous. Sometimes it's better to seal it up and leave it where it is.
How about shellacing the "pine" hide with an inert resin? Or at least the interior if you're worried?
SaulsMom