Basic verification debugging functionality #863
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…ng configuration, general cleanup
…, avoiding some performance issues
…ee is huge (or infinite?)
marcoeilers
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…d after evaluating SeqContains args
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…d after evaluating SeqContains args (#874)
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This PR enables basic support for verification debugging in Silicon (using the
--enableDebuggingcommand line flag), implemented by @AndreaKe in her practical work project, and adapted to Silicon changes and extended or improved in various small ways by me.It depends on Silver PR viperproject/silver#810.
There are two major changes:
Terms, but also the newDebugExprs, which a) group assumptions by their origin and b) contain either a textual description or a Viper-levelExprfor each assumption etc. As a result, the current state with all assumptions can be displayed to the user in a way that refers to Silicon-internal concepts as little as possible and makes sense on the Viper level.SiliconDebuggeris added, which enables debugging verification errors by locally and interactively assuming or asserting expressions, dropping assumptions, switching SMT solvers or changing solver options. For now, this happens only via a command line interface.