\subsection{\GAST}
\GAST is an open source model based test tool developed by Koopman et
-al.\cite{koopman2003gast} and is a design specific language written in the
+al.\cite{koopman2003gast} and is a domain specific language written in the
functional programming language Clean. Models in \GAST must be expressed as
functions. \GAST supports two different types of testing. Standard model
checking and property based testing. As discussed earlier we are not using