A Case Study in Automated A Case Study in Automated Verification - - PowerPoint PPT Presentation

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Aug 13, 2022 200 likes •369 views

A Case Study in Automated A Case Study in Automated Verification Verification Jason Kirschenbaum Kirschenbaum, , Jason Heather Harton Harton and and Murali Murali Heather Sitaraman Sitaraman Introduction Introduction Goal is to

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A Case Study in Automated A Case Study in Automated Verification Verification

Jason Jason Kirschenbaum Kirschenbaum, , Heather Heather Harton Harton and and Murali Murali Sitaraman Sitaraman

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Introduction Introduction

Goal is to investigate automatic verification Goal is to investigate automatic verification

f extensions to software components
f extensions to software components

– – Including the development process Including the development process

Selection Sort Example Selection Sort Example

– – Simple Simple – – Theory Development Theory Development – – Specifications Specifications

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Focus of this Work Focus of this Work

Full Behavioral Verification Full Behavioral Verification Language with Clean Semantics Language with Clean Semantics Modular Verification Modular Verification Generic Specification and Implementation Generic Specification and Implementation

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Resolve Language Resolve Language

Design by Contract Design by Contract Model Based Model Based Specifications Specifications Modular Reasoning Modular Reasoning Layered Layered Implementations Implementations Parameterized Code Parameterized Code Value Semantics Value Semantics Alias Avoidance Alias Avoidance Total Correctness Total Correctness Code Annotation Code Annotation Constructs Constructs

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Vision of Development Process Vision of Development Process

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Isabelle Isabelle

Higher Order Higher Order Large Library of Verified Theories Large Library of Verified Theories Both Automated and User Both Automated and User-

guided proof

guided proof methods methods

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Selection Sort Specification Selection Sort Specification

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Challenges Challenges

Human Errors Human Errors

– – Specification bugs Specification bugs

Tool Weaknesses Tool Weaknesses

– – Lemmas involving permutation Lemmas involving permutation – – Proof is too long for Isabelle to find Proof is too long for Isabelle to find

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Challenge 1: Human Errors Challenge 1: Human Errors

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Corrected Implementation Corrected Implementation

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Challenge 2: Automation Challenge 2: Automation

Verification Condition Proofs Issues Verification Condition Proofs Issues

– – Permutation Development Permutation Development – – Length of Proof Length of Proof

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First Type of Problem VC First Type of Problem VC

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Second Type of Problem VC Second Type of Problem VC

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Proposed Theory Development Proposed Theory Development

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Updated Implementation Updated Implementation

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