Update ayoun.md

_people/ayoun.md

@@ -11,11 +11,13 @@ projects:
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 Sacha Ayoun is a PhD student at the Department of Computing at Imperial, under
-the supervision of Professor Philippa Gardner. During his undergraduate 2017,
-he worked at the [French Alternative and Atomic Energy Commission
+the supervision of Professor Philippa Gardner. He is currently working 
+on [Gillian](https://gillianplatform.github.io), a parametric symbolic execution 
+tool for symbolic testing, verification and automatic compositional testing.
+
+During his undergraduate 2017, Sacha worked at the [French Alternative and Atomic Energy Commission
 (CEA)](http://www.cea.fr/english) as a researcher-engineer intern.
 His goal was to improve the Frame-C abstract interpreter to better handle
 file descriptors. In 2018 he completed his Supelec Engineer Diploma
 at [CentraleSupelec](http://www.centralesupelec.fr/)
-as well as his MSc in Advanced Computing at Imperial.  His PhD will be focused
-on JavaScript Verification using separation logic.
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+as well as his MSc in Advanced Computing at Imperial.
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