There's a few novel techniques such as minimal version selection: https://research.swtch.com/vgo-mvs https://research.swtch.com/vgo-mvs. I know I've seen a few

There's a few novel techniques such as minimal version selection: https://research.swtch.com/vgo-mvs https://research.swtch.com/vgo-mvs. I know I've seen a few others in the past years but I'm struggling to remember which ones are non-SAT solving approaches.