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A Formally Verified WET Estimation Tool And Maroneze1, Sandrine Blazy1, David Pichardie2, and Isabelle Puaut1 12IRISA University Rennes 1 Campus Universities de Beaulieu, Rennes, France Andre. Maronite

How to fill out a formally verified wcet

How to fill out a formally verified wcet:

1. Understand the purpose: Before filling out a formally verified Worst-Case Execution Time (WCET), it is crucial to understand its purpose. A formally verified WCET is used to determine the maximum amount of time that a program or a specific piece of code will take to execute on a given hardware platform. This information is vital for real-time systems or safety-critical applications.
2. Choose an appropriate tool: Select a suitable tool for formally verifying the WCET. There are several tools available in the market that specialize in determining the WCET of programs. These tools often use techniques like abstract interpretation, model-based analysis, or static analysis to provide accurate estimations of the WCET.
3. Identify the target program: Determine the specific program or code section that needs to be analyzed. It is essential to clearly define the boundaries of the code or the function for which the WCET needs to be verified.
4. Analyze the code: Use the selected tool to analyze the code and generate the necessary information for verifying the WCET. The tool will examine the code's control flow, data dependencies, and resource utilization to estimate the worst-case execution time accurately.
5. Configure the hardware platform: Provide the necessary input to the tool regarding the target hardware platform. This includes information such as processor architecture, cache configurations, and memory organization. The accuracy of the WCET estimation heavily depends on correctly configuring the hardware platform.
6. Perform the verification: Run the verification process using the selected tool. This may involve running extensive simulations, performing runtime analysis, or statically analyzing the code. The tool will provide the formally verified WCET estimation based on its analysis.

Who needs a formally verified wcet:

1. Developers of real-time systems: Developers of real-time systems, such as those used in aviation, automotive, or medical industries, often require a formally verified WCET. Real-time systems have strict timing requirements, and accurate knowledge of the WCET is crucial for meeting these requirements and ensuring system safety.
2. Safety-critical applications: Applications that operate in safety-critical environments, like those used in nuclear power plants or transportation systems, require a formally verified WCET. Safety-critical systems necessitate precise timing analysis to ensure proper functioning and to identify potential hazards or failures.
3. Optimizing code performance: Even in non-safety-critical scenarios, developers may use a formally verified WCET to optimize code performance. By identifying code sections with high execution times, developers can focus on optimizing these sections to improve overall system efficiency.

Overall, anyone involved in real-time systems, safety-critical applications, or code optimization can benefit from a formally verified WCET. The accurate estimation of WCET helps ensure timing correctness, safety, and the optimal performance of programs.

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What is a formally verified wcet?

A formally verified WCET (Worst Case Execution Time) is a guarantee that the software program will not exceed a certain execution time under given conditions.

Who is required to file a formally verified wcet?

Anyone developing safety-critical systems or real-time systems may be required to file a formally verified WCET to ensure the system meets timing constraints.

How to fill out a formally verified wcet?

To fill out a formally verified WCET, one must perform timing analysis on the software program to determine the worst-case execution time and ensure it meets the required constraints.

What is the purpose of a formally verified wcet?

The purpose of a formally verified WCET is to provide a guarantee that the software program will meet timing requirements and operate safely under all conditions.

What information must be reported on a formally verified wcet?

A formally verified WCET must report the worst-case execution time of the software program, the analysis method used, and any assumptions made during the verification process.