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Drain path selector queues without scheduling or merging - #500
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Stopping analysis must expose every queued state without advancing scheduling, merging states, or losing deferred paths. Add
UPathSelector.drain()and wrapper implementations that preserve state identity, include pending iterative-deepening and exceptional queues, and remove merging-searcher entries without attempting a merge.Extracted from #479 at
421dd926ee39312ec678bfc23be5390066f5a398. This PR contains the selector API and its tests; machine emission and the class experiment remain in subsequent changes.Validation: all 9
PathSelectorDrainTesttests passed, and:usvm-ts:compileKotlinpassed. Full suites are left to CI.