The plugin state itself

formulas

Create a new backtrack level

Pop n levels of the theory

Assume the formulas in the slice, possibly using the slice to push new formulas to be propagated or to raising a conflict or to add new lemmas.

Called at the end of the search in case a model has been found. If no new clause is pushed, then proof search ends and "sat" is returned; if lemmas are added, search is resumed; if a conflict clause is added, search backtracks and then resumes.