Predicate Pairing with Abstraction for Relational Verification

@inproceedings{Angelis2017PredicatePW,
  title={Predicate Pairing with Abstraction for Relational Verification},
  author={Emanuele De Angelis and Fabio Fioravanti and Alberto Pettorossi and Maurizio Proietti},
  booktitle={LOPSTR},
  year={2017}
}
Relational verification is a technique that aims at proving properties that relate two different program fragments, or two different program runs. It has been shown that constrained Horn clauses (CHCs) can effectively be used for relational verification by applying a CHC transformation, called Predicate Pairing, which allows the CHC solver to infer relations among arguments of different predicates. In this paper we study how the effects of the Predicate Pairing transformation can be enhanced by… 
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Analysis and Transformation of Constrained Horn Clauses for Program Verification
TLDR
Analysis and transformation techniques that originate in the field of constraint logic programming (CLP) to the problem of verifying software systems are surveyed and static analysis techniques for CHCs that may be used for inferring relevant program properties, such as loop invariants are described.
Semantic program alignment for equivalence checking
TLDR
A robust semantics-driven technique for program equivalence checking is introduced and it is demonstrated that the algorithm is applicable to challenging equivalence problems beyond the scope of existing techniques.

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