![]() A visit to any site or page from our web site via these links is done entirely at your own risk. provides links to third party sites only as a convenience and the inclusion of such links on our site does not imply 's endorsement of either the site, the organization operating such site, or any products or services of that organization. Note: We try to keep all external and related links up-to-date, however we are not responsible for the content of any site linked, further links on sites linked, or any changes or updates to the the information found on these sites. In this talk, we overview some of these techniques including bounded model checking, interpolation-based model checking, k-induction, predicate abstraction, and combination thereof.File types | Find file converter | Software | Articles | FAQs | Privacy policy | About us | RSS This "Verification-Modulo-Theory" (VMT) has been applied to different applications such as software, timed and hybrid systems, and microcode. In fact, by reducing a verification problem to a possibly infinite series of SMT problems, infinite-state systems with reals, integers, or other data types can be verified. Meanwhile, many techniques have been conceived to verify properties of transition systems exploiting the efficiency and features of SMT solvers. Many solvers have been optimized for different theories and enhanced with advanced features such as incrementality, unsat cores, interpolation. Title: VMT techniques (slides available here )Ībstract: Satisfiability-modulo-theory is the problem of checking the satisfiability of a logical formula with a background theory. The VMT initiative, while leveraging the advances of SMT, will allow to deal natively with issues resulting from the verification of transition systems, hopefully resulting in a new generation of model checkers modulo theory. The aim is to define a language, a library of benchmarks, and to set up a competition, for verification problems resulting from transition systems described in SMT. In this talk I will argue in favour of a Verification Modulo Theory (VMT) initiative. In fact, many problems in the SMT-LIB are (bounded horizon) verification problems for such transition systems. To draw an analogy with the pure boolean case, SMT is the counterpart of SAT, but there is no "modulo theory" counterpart for Model Checking. However, the SMT initiative does not deal directly with the sequential nature of the transition system, where reachability is defined by unrolling of the transition relation. software, timed and hybrid systems, word-level circuits, microcode). Many practical problems in verification arise from the analysis of the transition systems that can be naturally represented in symbolic form within the SMT framework (e.g. Speaker: Alessandro Cimatti (FBK, Trento)Ībstract : The field of Satisfiability Modulo Theories (SMT) has greatly benefited from the SMT-LIB and SMT-COMP initiatives: the definition of a standard language supported the creation of a large collection of benchmarks, and the competition fostered tremendous progress in the performance of SMT solvers. Title: From Satisfiability to Verification Modulo Theories (slides available here ) ![]() The following example shows a simple NUXMV model and its corresponding VMT translation. Moreover, only the following commands are allowed to occur in VMT files: set-logic, set-option, declare-sort, define-sort, declare-fun, define-fun (For convenience, an additional (assert true) command is allowed to appear at the end of the file). In a VMT file, only annotated terms and their sub-terms are meaningful. The non-negative integer idx is a unique identifier for the property. :live-property idx is used to specify an LTL property of the form F Gp, where p is the formula annotated with :live-property. formulas of the form Gp, where p is the formula annotated with :invar-property. :invar-property idx is used to specify invariant properties, i.e. ![]() :trans is used to specify the formula for the transition relation. This formula should contain neither next-state variables nor input variables. :init is used to specify the formula for the initial states of the model. All the variables that are not in relation with another by means of a :next attribute are considered inputs. ![]() The two variables are linked by annotating x c with the attribute :next x n. For each variable x in the model, the VMT file contains a pair of variables, x c and x n, representing respectively the current and next version of x. :next name is used to represent state variables. ![]() In the core VMT-LIB language, the following annotations are used: ![]()
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