Component-based synthesis seeks to build programs using the APIs provided by a set of libraries. Oftentimes, these have effects, which make it challenging reason about correctness potential candidates. This is because changes global state made effectful library procedures affect how they may be composed together, yielding an intractably large search space that can confound typical enumerative t...

Automated specification-based testing has a long history with several notable tools having emerged. For example, QuickCheck for Haskell focuses on against user-provided properties. Others, such as JMLUnit, use specifications in the form of pre- and post-conditions to drive testing. An interesting (and under-explored) question is how effective this approach at finding bugs practice. In general, ...