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This PR updates the update-copyright.pl script to also update/add copyright headers to CMake specific files. It further fixes a small typo in the header.
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This was uncovered by a (spurious) proof checking failure on proof-new.
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This module is responsible for constructing the proof checker, proof node manager, and implementing dumping and checking of the final proof.
This PR includes setting up some connections into the various modules for proof production.
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This deletes much of the old proof code. Basically everything but the minimal necessary infra-structure for producing unsat cores. That includes dependency tracking in preprocessing, the prop engine proof and the unsat core computation code in the old proof manager. These should also go once we fully integrate into master the new proof infrastructure.
It also cleans interfaces that were using old-proof-code-specific constructs (such as LemmaProofRecipe). When possible or when it made sense standalone local proof production code was kept, but deactivated (such is in the equality engine and in the arithmetic solver).
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This splits all things related to storing assertions in the SmtEngine into a separate class "Assertions". It also converts the interface for its methods from Expr to Node.
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