The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2011
Filed:
Oct. 20, 2006
Hana Chockler, Haifa, IL;
Ziv Glazberg, Haifa, IL;
Benyamin Godlin, Jerusalem, IL;
Sharon Keidar-barner, Yokneam Ilit, IL;
Hana Chockler, Haifa, IL;
Ziv Glazberg, Haifa, IL;
Benyamin Godlin, Jerusalem, IL;
Sharon Keidar-Barner, Yokneam Ilit, IL;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for verifying software program code includes specifying a property that the software program code is expected to satisfy. The software program code and the property are transformed into an initial logical formula in a static single assignment (SSA) form, the formula including variables. A loop in the software program code is identified. Successive over-approximations are applied to a portion of the initial logical formula corresponding to the loop in order to produce a modified logical formula in the SSA form that represents a finite over-approximation of a set of states that are reachable by the loop. It is verified that the software program code satisfies the specified property by determining whether there is an assignment of the variables that satisfies the modified logical formula.