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Apr 10, 2012, 4:30:02 PM (13 years ago)
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syed
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/papers/FDL2012/

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  • papers/FDL2012/framework.tex

    r92 r93  
    1515%generated and tested in the model-checker. As the abstract model is an
    1616%over-approximation of the concrete model and the global property $\Phi$ is in the ACTL fragment,
    17 As show in \cite{clarke94model} for over-approximation abstraction, if $\Phi$
    18 holds on the the abstract model then it holds in the concrete model as well.
     17As shown in \cite{clarke94model} for over-approximation abstraction, if $\Phi$
     18holds in the abstract model then it holds in the concrete model as well.
    1919However, if $\Phi$ does not hold in the abstract model then one cannot conclude anything regarding the concrete model until the counterexample has been analyzed.
    2020The test of spurious counter-example is then translated into a
     
    6060%\topsep -0.5em
    6161\itemsep -0.3em
    62 \item $I$ is a finite set of Boolean inputs signals.
    63 \item $O$ is a finite set of Boolean outputs signals.
     62\item $I$ is a finite set of Boolean input signals.
     63\item $O$ is a finite set of Boolean output signals.
    6464\item $R$ is a finite set of Boolean sequential elements (registers).
    6565\item $\delta : 2^I \times 2^R \rightarrow 2^R$ is the transition function.
     
    7676$M = C_1 \parallel C_2 \parallel \ldots \parallel C_n$,where each $C_i$ is a
    7777Moore machine with a specification associated $\varphi_i = \{\varphi_i^1 \ldots
    78 \varphi_i^k\}$ Each $\varphi_i^j$ is a CTL$\setminus$X formula whose
     78\varphi_i^k\}$. Each $\varphi_i^j$ is a CTL$\setminus$X formula whose
    7979propositions $AP$ belong to $\{I_i\cup O_i\cup R_i\}$ .
    8080\end{definition}
     
    126126
    127127\vspace*{-2mm}
    128 We denote by $\widehat{L}(s)$ the configuration of atomic propositions in state $s$ and by $\widehat{L}(s)[p]$ the projection of configuration $\widehat{L}(s)$ according to atomic proposition $p$.
     128We denote by $\widehat{L}(s)$, the configuration of atomic propositions in state $s$, and by $\widehat{L}(s)[p]$, the projection of configuration $\widehat{L}(s)$ according to atomic proposition $p$.
    129129
    130130
     
    155155%\subsection{Characterization of AKS}
    156156
    157 In an AKS a state where a variable $p$ is {\it unknown}
     157In an AKS, a state where a variable $p$ is {\it unknown}
    158158can simulate all states in which $p$ is either true or false. It
    159159is a concise representation of the set of more concrete states in which $p$
    160160is either true or false.  A state $s$ is said to be an \emph{abstract state}
    161 if one its variable $p$ is {\it unknown}.
     161if one of its variable $p$ is {\it unknown}.
    162162
    163163%\begin{definition}
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