Vacuity detection is a common practice accompanying model checking of hardware designs. Roughly speaking, a system satisfies a specification vacuously if it can satisfy a stronger specification obtained by replacing some of its subformulas with stronger expressions. If this happens then part of the specification is immaterial, which typically indicates that there is a problem in the model or the specification itself. We propose to apply the concept of vacuity to the synthesis problem. In synthesis, there is often a problem that the specifications are incomplete, hence under-specifying the desired behaviour, which may lead to a situation in which the synthesised system is different than the one intended by the designer. To address this problem we suggest an algorithm and a tool for non-vacuous bounded synthesis. It combines synthesis for universal and existential properties; the latter stems from the requirement to have at least one interesting witness for each strengthening of the specification. Even when the system satisfies the specification non-vacuously, our tool is capable of improving it by synthesizing a system that has additional interesting witnesses. The user decides when the system reflects their intent.
Tue 17 Jan
|10:30 - 11:00|
|11:00 - 11:30|
Roderick BloemInstitute of Software Technology, Graz University of Technology , Hana Chockler, Masoud EbrahimiInstitute of Applied Information Processing and Communications, Graz University of Technology, Ofer StrichmanTechnionFile Attached
|11:30 - 12:00|
Dejan JovanovićSRI International