How HP got duped into overpaying billions for Autonomy

HP once was the icon of good management. But for the past 10 years it has gone through several CEOs and the middle of a turnaround has to write off $9 billion dollars because it acquisition of Autonomy turned out to be a fiasco. HP alleges that Autonomy mis-represented its financial worth. The founder of Autonomy claims that HP destroyed Autonomy within one year.
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But here is also a voice that articulates that if you are buying a company to secure your future, many deals will go wrong but some may go right and prevent you from becoming irrelevant.
Acquisitions is like doing R&D with a high failure rate.