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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Automated Detection of Non-termination and NullPointerExceptions for Java Bytecode
verfasst von : Marc Brockschmidt, Thomas Ströder, Carsten Otto, Jürgen Giesl
Erschienen in: Formal Verification of Object-Oriented Software
Verlag: Springer Berlin Heidelberg
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Recently, we developed an approach for automated termination proofs of
Java Bytecode
(
JBC
), which is based on constructing and analyzing
termination graphs
. These graphs represent all possible program executions in a finite way. In this paper, we show that this approach can also be used to detect
non-termination
or
NullPointerException
s. Our approach automatically generates
witnesses
, i.e., calling the program with these witness arguments indeed leads to non-termination resp. to a
NullPointerException
. Thus, we never obtain “false positives”. We implemented our results in the termination prover
AProVE
and provide experimental evidence for the power of our approach.