(2021) A Temporal Logic for Asynchronous Hyperproperties.
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10.1007/Baumeister2021_Chapter_ATemporalLogicForAsynchronousH.pdf - Published Version Available under License Creative Commons Attribution. Download (535kB) | Preview |
Abstract
Hyperproperties are properties of computational systems that require more than one trace to evaluate, e.g., many information-flow security and concurrency requirements. Where a trace property defines a set of traces, a hyperproperty defines a set of sets of traces. The temporal logics HyperLTL and HyperCTL* have been proposed to express hyperproperties. However, their semantics are synchronous in the sense that all traces proceed at the same speed and are evaluated at the same position. This precludes the use of these logics to analyze systems whose traces can proceed at different speeds and allow that different traces take stuttering steps independently. To solve this problem in this paper, we propose an asynchronous variant of HyperLTL. On the negative side, we show that the model-checking problem for this variant is undecidable. On the positive side, we identify a decidable fragment which covers a rich set of formulas with practical applications. We also propose two model-checking algorithms that reduce our problem to the HyperLTL model-checking problem in the synchronous semantics.
| Item Type: | Conference or Workshop Item (A Paper) (Paper) |
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| Divisions: | Bernd Finkbeiner (Reactive Systems Group, RSG) |
| Conference: | CAV Computer Aided Verification |
| Depositing User: | Norine Coenen |
| Date Deposited: | 22 Sep 2021 10:46 |
| Last Modified: | 22 Sep 2021 10:46 |
| Primary Research Area: | NRA2: Reliable Security Guarantees |
| URI: | https://publications.cispa.saarland/id/eprint/3480 |
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