The Mathworks, Inc.

William James Aldrich

Kai Tuschner

Ebrahim Mehran Mestchian

Xiaocang Lin

Aravind Pillarisetti

Zsolt Kalmar

Gregoire Hamon

Olga Voronina

Denizhan N Alparslan

Mirko Conrad

Zhi Han

Prahladavaradan Sampath

Anjali Dattatray Joshi

Dixit Manoj Gangadhar

Pieter Johannes Mosterman

Fu Zhang

William F Potter

David M Boissy

Stacey Gage

Richard Hyde

George Quievryn

Barton D Addis

Aaron Hughes

Janaki Sivaramakrishnan

Amogh Margoor

Grégoire Hamon

A device may analyze, by one or more processors, a model to identify a first set of model elements that are associated with a model element. The device may apply, by the one or more processors, one or more results from an analysis of the model to a first network unit to determine a complexity of the first network unit or a coupling of the first network unit to other model elements of the model. The device may generate, by the one or more processors, a second network unit, representing a second hierarchy of computation, from the first network unit based on the complexity or the coupling. The device may provide, by the one or more processors, the second network unit as a testing unit for testing the model, the second network unit comprising two or more model elements and one or more numeric expressions.

Method and system for improving efficacy of model verification by model partitioning

Systems and methods for coverage analysis using context information are described. The systems and methods can be used to obtain program code and test information for testing the program code, the test information associated with context information for providing context for testing the program code. Coverage information can be generated by testing the program code according to the test information. A first association can be generated between the context information and the test information. A second association can be generated between the context information and the program code. A third association can be generated between the coverage information and the test information. A subset of the coverage information can be determined based on the third association and a fourth association between the test information and the program code determined based on the first and second associations. An indication of the subset of the coverage information can be displayed.

Refining coverage analyses using context information

A computer-based model having executable semantics may be used to simulate the behavior of a system. A substructure of interest is sliced from the model and analyzed to determine a transformation of the slice while preserving some context of the model. The transformed slice may be further manipulated outside of the model, integrated back into the model in place of the original slice, or used in other ways.

Model structure analysis with integration of transformed slice

A system and method generates contextual information for a source model. An identification of one or more first model elements of interest within the source model may be received. One or more constraints on inputs of selected model elements also may be received. A scope of analysis regarding outputs of the first model elements may be specified. The contextual information may be derived automatically for the one or more first model elements. The contextual information may include one or more model elements, signals, or states that are contained with the scope of analysis while execution of the source model is limited by the one or more constraints. The derived contextual information may be provided to an output device.

Deriving contextual information for an execution constrained model

A device may obtain a model. The model, when executed, may simulate a behavior of a physical system. A user, such as, for example, an engineer, may specify a design interest for the model. The design interest may be associated with a particular behavior of a portion of the model. The device may analyze the model based on the design interest and may determine, based on analyzing the model, a group of model elements, included in the model, that are related to the design interest. The device may generate, based on the group of model elements, a model slice. When the model slice is executed, a behavior of the model slice may correspond to the particular behavior of the portion of the model. The device may analyze the particular behavior of the portion of the model based on executing the model slice.

Analyzing model based on design interest

A system and method generates a contextual model for a source model. The system and method receives a designation of a component of interest in the source model. The system and method analyzes the source model and identifies those model elements within the source model that have an interaction behavior with the component of interest. The system and method includes the component of interest and the model elements having the interaction behavior with the component of interest in the contextual model. The system and method connects the model elements to the component of interest in the context model in a similar manner as in the source model. The context model may be run or evaluated.

Partitioning block diagrams into executable contextual models

A system and method extends model verification through the creation of composite test objectives. A composite objective includes two or more logically or temporally combined standard or basic test objectives. The basic test objectives selected to form a composite test may be automatically generated by the system or method, or they may be custom defined. A composite test objective represents a new coverage objective that extends model coverage analysis beyond the coverage that is available with the basic test objectives. The system and method also automatically generates one or more test cases for achieving the composite objective. The test cases include input data values for the model, and may cause the specified logical or temporal combination of basic test objectives to evaluate to true at least once during simulation of the model or according to the temporal combination.

System and method for performing model verification

A computer-implemented method includes obtaining a first representation of a system, obtaining a set of test obligations, and automatically generating one or more test cases from the first representation based on the set of test obligations. The method further includes obtaining a second representation that is related to the first representation, obtaining an analysis criterion for the second representation, and assessing the analysis criterion using the one or more test cases applied to the second representation. Based on the assessing, one or more additional test obligations may be identified and a second set of one or more test cases may be generated based on the one or more additional test obligations.

Automatic test generation for model-based code coverage

An embodiment includes a computer-readable media storing instructions that when executed on processing logic execute a process for reducing complexity. The media stores instructions for identifying data dependencies in a model having executable semantics, the data dependencies affecting verification of the model and for selecting a location in the model, the location having data dependencies with other locations in the model, the location to be verified when the model is verified. The media also stores instructions for detecting complexities in the model, the complexities related to the selected location and presenting information about a source for at least one of the complexities. The media further stores instructions for eliminating the source for the at least one of the complexities and for transforming the model into an updated model based on the eliminating, the updated model not including the source for the at least one of the complexities.

System and method for identifying and reducing model complexities affecting model verification

A method includes generating source code corresponding to a block diagram model and generating hypertext links associating elements of the generated source code with elements of the block diagram model.

Linked code generation report

An embodiment can include one or more computer-readable media storing executable instructions that when executed on processing logic process variable signals. The media can store one or more instructions for receiving executable code that includes constructs with variable signals for processing the variable signals, and for performing a coverage measurement on the executable code based on information about one or more of the variable signals processed by the executable code. The media can store one or more instructions for producing a coverage result based on the coverage measurement, the coverage result identifying a degree of coverage for the executable code when the executable code processes the variable signals.

Coverage analysis for variable size signals

A computer-implemented method may include receiving a specification including one or more instances of a language construct, the language construct having an exceptional behavior; identifying in the specification the one or more instances of the language construct having the exceptional behavior; applying a modification to the one or more instances of the language construct having the exceptional behavior, the modification making the exceptional behavior explicit; analyzing the specification for dynamic occurrences of the explicit exceptional behavior; and generating information identifying the dynamic occurrences of the explicit exceptional behavior.

Verifying models for exceptional behavior

Exemplary embodiments employ a mapping among entities that are related to each other. The entities may include a graphical model, generated code, a generated report, a requirements document and/or an intermediate representation. The mapping may facilitate graphical identifications between parts of one entity that maps to part of another entity. The graphical identification may occur based on a selection of a part in one of the entities.

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Natick, MA, United States of America

William James Aldrich