Jsoup always crashes android when the select matching expression cannot match any element in the given doc which in your case#__EVENTVALIDATION
in not on your input element.
Check in your Elements input if #__EVENTVALIDATION
exists.
Btw:In your code you can directly access any element by selecting #id
tag. for example
doc = Jsoup.connect("http://instantgram.ic.cz/index.html").get();
Elements eventvd = doc.select("input[id =__EVENTVALIDATION");