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:
Aug. 14, 2007
Filed:
Aug. 18, 2003
James Herbert Kukula, Hillsboro, OR (US);
James Herbert Kukula, Hillsboro, OR (US);
Synopsys, Inc., Mountain View, CA (US);
Abstract
An approach to solving combinational constraints, comprising compile and generate phases, is presented. The compile phase constructs successive sets of constraints, each with a solution generator, according to blocks of a partition of the constraints' random variables. Interleaving conjunction of the constraints, with existential quantification of the constraints, is attempted. The generate phase uses a reverse-order, block-by-block, process for solving constraints, where variables of each solution generator processed have been predetermined, by the processing of earlier blocks, except for the random variables of the current block. The present invention can be used in conjunction with image computation. Successive sets of reachable states of an FSM at successive time steps can be determined by successive applications of the compile phase, with each set of solution generators being saved. The sets of solution generators permit a backward sequence of states, from an error state back to a start state, to be determined.