z3py - Incremental solving in Z3 using push command -

i using z3's python api kind of incremental solving. push constraints solver iteratively while checking unsatisfiability @ each step using solver.push() command. want understand whether z3 use learned lemmas previous constraints or satisfying solution obtained when solving newly added constraint. never use solver.pop() command. can more details how work done in previous iterations used?

z3 has multiple solvers, 1 of them supports incremental solving , reuse work previous calls. default, z3 automatically switch incremental solver whenever execute solver.push(). solver alsos reuse learned clauses. learned clauses deleted when solver.pop() executed. z3 support mechanism incremental solving not based on push , pop. here related posts:

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