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Program Verification using HOLUNITY
 Higher Order Logic Theorem Proving and Its Applications: HUG ’93, LNCS 780
, 1994
"... . HOLUNITY is an implementation of Chandy and Misra's UNITY theory in the HOL88 and HOL90 theorem provers. This paper shows how to verify safety and progress properties of concurrent programs using HOLUNITY. As an example it is proved that a liftcontrol program satisfies a given progress pro ..."
Abstract

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. HOLUNITY is an implementation of Chandy and Misra's UNITY theory in the HOL88 and HOL90 theorem provers. This paper shows how to verify safety and progress properties of concurrent programs using HOLUNITY. As an example it is proved that a liftcontrol program satisfies a given progress property. The proof is compositional and partly automated. The progress property is decomposed into basic safety and progress properties, which are proved automatically by a developed tactic based on a combination of Gentzenlike proof methods and Pressburger decision procedures. The proof of the decomposition which includes induction is done mechanically using the inference rules of the UNITY logic implemented as theorems in HOL. The paper also contains some empirical results of running the developed tactic in HOL88 and HOL90, respectively. It turns out that HOL90 in average is about 9 times faster than HOL88. Finally, we discuss various ways of improving the tactic. 1 Introduction This paper pres...