5,194 research outputs found
Boost the Impact of Continuous Formal Verification in Industry
Software model checking has experienced significant progress in the last two
decades, however, one of its major bottlenecks for practical applications
remains its scalability and adaptability. Here, we describe an approach to
integrate software model checking techniques into the DevOps culture by
exploiting practices such as continuous integration and regression tests. In
particular, our proposed approach looks at the modifications to the software
system since its last verification, and submits them to a continuous formal
verification process, guided by a set of regression test cases. Our vision is
to focus on the developer in order to integrate formal verification techniques
into the developer workflow by using their main software development
methodologies and tools.Comment: 7 page
Improved maximum likelihood estimators in a heteroskedastic errors-in-variables model
This paper develops a bias correction scheme for a multivariate
heteroskedastic errors-in-variables model. The applicability of this model is
justified in areas such as astrophysics, epidemiology and analytical chemistry,
where the variables are subject to measurement errors and the variances vary
with the observations. We conduct Monte Carlo simulations to investigate the
performance of the corrected estimators. The numerical results show that the
bias correction scheme yields nearly unbiased estimates. We also give an
application to a real data set.Comment: 12 pages. Statistical Paper
Reduction and construction of Poisson quasi-Nijenhuis manifolds with background
We extend the Falceto-Zambon version of Marsden-Ratiu Poisson reduction to
Poisson quasi-Nijenhuis structures with background on manifolds. We define
gauge transformations of Poisson quasi-Nijenhuis structures with background,
study some of their properties and show that they are compatible with reduction
procedure. We use gauge transformations to construct Poisson quasi-Nijenhuis
structures with background.Comment: to appear in IJGMM
Review of recent research on the development of infant social behavior
The purpose of this paper was (1) to review the literature which relates to the identification of the earliest signs of social awareness in an infant; (2) to establish the importance of stimulation to develop early social-awareness and social behavior in an infant
SMT-Based Refutation of Spurious Bug Reports in the Clang Static Analyzer
We describe and evaluate a bug refutation extension for the Clang Static
Analyzer (CSA) that addresses the limitations of the existing built-in
constraint solver. In particular, we complement CSA's existing heuristics that
remove spurious bug reports. We encode the path constraints produced by CSA as
Satisfiability Modulo Theories (SMT) problems, use SMT solvers to precisely
check them for satisfiability, and remove bug reports whose associated path
constraints are unsatisfiable. Our refutation extension refutes spurious bug
reports in 8 out of 12 widely used open-source applications; on average, it
refutes ca. 7% of all bug reports, and never refutes any true bug report. It
incurs only negligible performance overheads, and on average adds 1.2% to the
runtime of the full Clang/LLVM toolchain. A demonstration is available at {\tt
https://www.youtube.com/watch?v=ylW5iRYNsGA}.Comment: 4 page
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