Is it true that one who dies having abandoned prayer is not prayed over and not buried in Muslim cemeteries?

This question has been answered previously. The questioner should invite his father to prayer by every legitimate means, by encouraging him through mentioning its virtues, and by deterring him through explaining the ruling on abandoning it and its punishment. He should also let him listen to sermons and lessons that clarify this, try to win his heart with gifts, and supplicate for his guidance and a good end.