Abstractions PowerPoint PPT Presentations

Programs represent and manipulate abstractions, or chunks of information. a Sudoku board ... The most universal of these is a collection. lots of different ...

Lecture 2 Computation Models and Abstractions: Properties of Abstract Models Time Real, Relative, and Constrained Simplest Embedded Systems Forrest Brewer

1. Symbolic Characterization of Heap Abstractions. Greta Yorsh. Joint ... Extract information in the most precise way. More precise than ... Extracting ...

?? abstraction levels ? ??,?????. Design, Measurement, and ... reveals more information. An abstraction omits unneeded detail, helps us cope with complexity ...

Separating Abstractions from Resources in a Tactical Storage System Douglas Thain, Sander Klous, Justin Wozniak, Paul Brenner, Aaron Striegel, and Jesus Izaguirre

Computing Abstractions by integrating BDDs and SMT Solvers. Alessandro Cimatti ... Predicate Abstraction with BDDs and SMT. FMCAD'07, Austin, TX. Index of the talk ...

... allow any user to create, reconfigure, and tear down abstractions without ... I could reconfigure structures without root? (Or bugging the administrator daily. ...

File Servers, Catalogs, Abstractions, Adapters. Applications: ... 2 Catalogs. 3 Abstractions. 4 Adapters. 1 File Servers. Unix-Like Interface ...

Priority Research Direction (I/O Models, Abstractions and Software) Key challenges Summary of research direction What will you do to address the challenges?

`Simulation is sound for universal properties'' Open systems. Open systems: models ... a state s of satisfies a property, there is a finite state abstraction ...

Finite transition system M. A temporal property p. The model ... Homomorphic Abstractions. Abstract Interpretation Theory. Guarantees from Abstractions Safe ...

[ W]e must all start with reductionism, which I fully accept. ... Reductionist blind spot. Levels of abstractions are constraints. ...

KNAVE = Knowledge-Based Navigation of Abstractions for Visualization and Explanation ... Each user given a 10 minute introduction to the KNAVE-I system ...

Temporal properties. Require path-sensitive analysis. Swamped by false positives ... Doesn't scale to low level implementations. Can only model check 'abstractions' ...

Tool-supported Program Abstraction for Finite-state Verification. Matthew Dwyer1, John Hatcliff1, Corina Pasareanu1, Robby1, Roby Joehanes1, Shawn ...

Compile Time Abstraction Techniques for the D Programming Language ... Try each disjunction. Try each part. Recurs to other productions. Record checkpoints ...

Current predicate abstraction refinement methods not adequate for analyzing heaps ... A Canonical Abstraction. For every variable x (regular and auxiliary) ...

Abstract Interpretation Part II Mooly Sagiv Textbook: Chapter 4 CC79, CC92

Iterative Relaxation Abstraction. Sumit K. Jha, Bruce H. Krogh, ... Replace linear constraints with relaxed constraints involving only variables in V ...

A quick overview of the ideas of abstraction, hierarchy, ... NONLIN & SIPE. Search in the space of disjunctive partial plans. Disjunction handled explicitly ...

Case for Task-Driven Network-Wide Abstraction approach to Enterprise Design. Yu-Wei (Eric) Sung ... driven' 'Network-wide' abstraction approach to network ...

... O. Grumberg, Automatic refinement and vacuity detection for STE, CAV'06. J. Roorda, K. Clarssen, Sat-based assistance to abstraction refinement for STE, CAV'06 ...

Galois Connections. Concrete: S, Abstract: S' Abstract S. F(S) = S as S'. F' ... Galois Connections. S concrete, S' abstract. S' must be a complete lattice ...

Abstracts data by keeping track of certain predicates ... (DiVer) Analysis & Refinement. Discovered bug. in software. Certified code. F-Soft. Motivation ...

Another way to think of abstraction. A black box ... This abstraction is relies on term and next being procedures / functions. ...

An abstraction is a view or representation of an entity that includes only the ... 11.3 Design issues for ADT. Encapsulation. Information hiding. package. class ...

Procedure Abstraction. Must preserve p's state while q executes ... Procedure Abstraction. Each procedure call creates its own activation ...

u2. u3. u4. c,rx. c,rx. c,rx. c,rx. x. u1. u2. c,rx. c,rx. x. v1,v2:nodeu1(v1)nodeu2(v2) ... u2. y. y. Abstract. x. u1. uy. y. x. u1. u2. uy. y. x. April 2004 ...

Assertion Checking over Combined Abstraction of Linear Arithmetic and ... Nelson-Oppen Comb. O(n log n) Congruence Closure. O(n3) Gaussian Elimination ...

Abstraction ... A control abstraction performs a well-defined operation ... A data abstraction represents information. Data structures ...

Local Definitions, Scope, Functional Abstraction, and Polymorphism. Definitions ... continue to get better as we add abstraction mechanisms to our language ...

Optimizing Automatic Abstraction Refinement for GSTE Yan Chen, Fei Xie Portland State University Jin Yang Intel

Galois Connections (Insertions) Collecting semantics. The Soundness Theorem ... Odd/Even Abstract Interpretation {-2, 1, 5} {0,2} {2} {0} E. O. All concrete states ...

Combining Abstract Interpreters. Sumit Gulwani. Microsoft Research. Redmond, Group. Ashish Tiwari ... be verified only over the combined abstraction. Outline ...

Determine the level of abstraction for non-annotated variables using type-inference ... Want to use as much abstraction as possible, model precisely only when ...

Introduction to Abstract Interpretation Andy King a.m.king@kent.ac.uk http://www.cs.kent.ac.uk/~amk

Group concrete states with identical visible part to a single abstract state. ... Make visible one of the variables in the clauses that lead to the conflict ...

No procedural abstraction/recursion. No pointers ... Embedding of infinite system into a finite system via 'on-line' boolean abstraction ...

Predicate Abstraction for Software and Hardware Verification ... Extract a finite state model from an infinite ... HardwareC, SpecC, Handel-C, and SystemC ...

Building a Layered Framework for the Table Abstraction H. Conrad Cunningham Dept. of Computer & Information Science University of Mississippi Jingyi Wang

Reusable PVS Proof Strategies for Proving Abstraction Properties of I/O Automata Sayan Mitra MIT Computer Sc. and AI Lab mitras@csail.mit.edu Myla Archer

FN's signature provides information for storage for parameter and storage for ... Fig. 5.7, p. 225. Abstraction I : Encapsulation. 42. Heap Storage Management: ...

Reusable PVS Proof Strategies for Proving Abstraction Properties of I/O Automata. Myla Archer ... TAME [Archer '02] provides a set of strategies that exploit ...

Going from Concrete to Symbolic Model Checking. via Predicate Abstraction. Willem Visser ... Execute the concrete program on valid inputs. Collect all ...

Example. Legal. e=0. Error. e!=0. Library States. Interface. API. n0. n1. acq. rel. n2. acq. read ... Abstraction of library's internal state. Typestate Interpretation ...

approximate sets of concrete states by an abstract state ... existential quantification by disjunction, universal quantification by conjunction, so ...

each ei a pure boolean expression. each ei represents set of states for which ei is true ... Abstracting Expressions via F. F = { e1,...,en } ImpliesF(e) ...

Combining Discrete Abstraction and Model Checking. for the ... Center for Information and Systems Engineering. and Center for BioDynamics. Boston University ...

Idea: a whole biology lab on a single chip. Input/output. Sensors: luminescence, pH, glucose, etc. ... { mix(yellow, 1-i/4, blue, i/4); Fluidic Abstraction Layers ...

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