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Title: A Fixpoint Calculus for Local and Global Program Flows Author: Swarat Chaudhuri Last modified by: Swarat Chaudhuri Created Date: 12/22/2005 5:52:35 PM
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Fixpoint Semantics of Datalog Carlo Zaniolo Department of Computer Science University of California, Los Angeles WINTER 2002 Three Equivalent Semantics Model ...
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... of these s in our discussion about sets, denotes subset, denotes ... Only one assertion will be proved, the other follows by replacing False by True, ...
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Part 1: Efficient fixpoint evaluation ... Prolog is a language implemented in such a fashion. Technique is called resolution Example up(2,1) up(3,1) up ...
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Greatest fixpoint semantics. Typing the largest set of objects. The goal is to find the greatest fixpoint for a given data graph. ...
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... finds all tags where the string 'Serge' appears inside a element labelled 'first' ... Label comparison. Modal recursion (minimal and maximal fixpoint operators) ...
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Semantic model : Scott's 3-valued logic. B = { , 0, 1} View ... X=b in the fixpoint (Scott's view) X stabilizes to b for any delay assignment (circuit view) ...
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... is an algorithm to compute the greatest common divisor using Euclid's algorithm. ... A least fixpoint is computed using underapproximations to transition ...
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Solving equation x = f(x) Least solution is least fixpoint of f ... set with a least element' is a mouthful, we will just abbreviate it to 'domain' ...
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Deductive Databases Chapter 25
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Title: Deductive Databases Author: Raghu Ramakrishnan and Johannes Gehrke Description: Chapter 24 Last modified by: default Created Date: 12/2/1996 1:40:06 AM
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Are we running low on any parts needed to build a ZX600 sports car? What is total component and assembly cost to build ZX600 at today's part prices? ...
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Are we running low on any parts needed to build a ZX600 sports car? What is total component and assembly cost to build ZX600 at today's part prices? ...
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Title: Folie 1 Author: Peter beim Graben Last modified by: Peter Created Date: 10/27/2004 6:39:54 PM Document presentation format: Bildschirmpr sentation
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CS 201 Compiler Construction Data Flow Framework *
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A Tutorial on Automated Verification Tevfik Bultan
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CHA2545: WEEK 4 LECTURE: DENOTIONAL SEMANTICS OF A SIMPLE LANGUAGE TUTORIAL: Do exercises given out DURING THE WEEK: Go through ARJ s supporting WEB notes (from ...
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Computing Equilibria Christos H. Papadimitriou UC Berkeley christos
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Codish & Lagoon, TCS 2000. 3. THE VERIFICATION METHOD: abstract interpretation ... a type analyzer for logic programs (by Codish & Lagoon) available from a web site ...
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Infinite State Model Checking with Presburger Arithmetic Constraints Tevfik Bultan Department of Computer Science University of California, Santa Barbara
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SAT-based Bounded and Unbounded Model Checking Edmund M. Clarke Carnegie Mellon University Joint research with C. Bartzis, A. Biere, P. Chauhan, A. Cimatti,
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Title: Slide 1 Author: Luca Cardelli Last modified by: Luca Cardelli Created Date: 11/27/2002 11:58:05 AM Document presentation format: On-screen Show
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The SLAM Project: Debugging System Software via Static Analysis Thomas Ball Sriram K. Rajamani Microsoft Research http://research.microsoft.com/slam/
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integer a,b,c,r; restrict a =0 and b =0 and c =0; initial r=0; module max(x,y,result) ... b' x: integer, y:boolean (x 0 and x' x 1 and y'=true) or (x =0 and x' ...
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unsigned int t; struct _Info info; for (i = 0; i SPIGOT_COUNT; i ) APIERR err; ...
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finite abstractions plus iterative refinement (FAIR) is more powerful than WAIL ... If WAIL succeeds in N iterations then FAIR will succeed in N iterations ...
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y = 2; x = 1; read(n); Two Correct Dynamic Slices. typical ... How big are unions of relevant slices? How good an approximation can effective slicing give? ...
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15-411 Compiler Design Nov. 3, 2005 Recall: Data Flow Analysis A framework for proving facts about program Reasons about lots of little facts Little or no interaction ...
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HaLoop: Efficient Iterative Data Processing On Large Scale Clusters Horizon Yingyi Bu, UC Irvine Bill Howe, UW Magda Balazinska, UW Michael Ernst, UW
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Define fragments AMC and EMC, where only one branching mode is allowed ... Given an AMC formula f, consider the Linear m calculus formula f' obtained by ...
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No primed variables in state formulas ... In transition formulas primed-variables denote the next-state values, unprimed ... actions: primed variables denote ...
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Sort Quicksort Shortest Paths COMP 201 Formal Specification with ASML. (Examples) Hoare s quicksort Quicksort was discovered by Tony Hoare (published in 1962).
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Automated Verification of Temporal Properties of Finite State Systems ... pre and post-conditions are not enough. Reactive Systems: A Very Simple Model ...
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representation: list. of comAtom intersect() union() BoolSym ... the property S2 in the original version is a path that consists of 887 states ...
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Symbolic Simulation-Checking of Dense-Time Automata Farn Wang Dept. of Electrical Engineering National Taiwan University
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Game Theory and Math Economics: A TCS Introduction Christos H. Papadimitriou UC Berkeley www.cs.berkeley.edu/~christos
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Can be extended to other variable types if a symbolic representation is provided ... Eliminating one variable from a conjunction of constraints may double the number ...
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Computation, Computers, and Programs Godel's incompleteness theorem ... Introduction rules operate on the right of the turnstile ...
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Example of Attack Graph Developed by a Professional Red Team ... LICQ remote- to-user. CVE-2001-0439. Local buffer. overflow. CVE-2002-0004. Done! ...
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Games for. Controller Synthesis. Laurent Doyen. EPFL. MoVeP'08. The ... Thermometer. Gas. burner. Given a plant P and a specification f, ... Thermometer ...
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Characteristic functions and BDDs. Symbolic Model Checking. Image/preimage computation ... often used for characteristic functions. Symbolic Representation. T ...
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Modules can have submodules ... Module based. Source attributes, target attributes. Enabling conditions. Rules, combining policies ...
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Title: Object-Oriented Databases Author: Martin Dickey Last modified by: dickey Created Date: 11/24/1997 4:30:42 AM Document presentation format: On-screen Show
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... deal of ingenuity may be required to organize the proof in a manageable fashion. ... a bit towards the late eighties, with machines getting faster and RAM ...
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Chapter 5: Other Relational Languages Query-by-Example (QBE) Datalog Query-by-Example (QBE) Basic Structure Queries on One Relation Queries on Several Relations The ...
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String Analysis for Dependable Input Validation Tevfik Bultan Verification Lab Department of Computer Science University of California, Santa Barbara
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... set of resulting abstract states is turned into a single abstract state, by ... shows how to improve precision. inference rules mimic the concrete semantics ...
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CS 290C: Formal Models for Web Software Lectures 17: Analyzing Input Validation and Sanitization in Web Applications Instructor: Tevfik Bultan
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Requires domain-specific knowledge and coding. Solution: ... Initial mapping can apply domain knowledge. In this example: StringMatch is used: ...
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Testing/simulation of designs/implementations may not reveal error ... VisualSTATE, Statemate, Verilog, Formalcheck,... 8. CaV 2003. Cb. System Description ...
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Reducibility Among Equilibrium Problems (Goldberg, Papadimitriou): Aug 2005 ... a panchromatic cubelet, i.e., one that has all of d0, d1, d2, d3 among its 8 neighbors ...
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Eliminating Web Software Vulnerabilities with Automated Verification Tevfik Bultan Verification Lab Department of Computer Science University of California, Santa Barbara
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It won't be executed, but removing it reduces size of object code ... a a = a ( idempotent ) a b = b a ( commutative ) a ( b c ) = ( a b ) c ( associative ) ...
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... a game ... Given a game G and winning conditions W1 and W2, Player 1 is winning if ... A game graph Observation structure. delay. delay. off. on. on, off. on, ...
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Datalog Inspired by the impedance mismatch in relational databases. Main expressive advantage: recursive queries. More convenient for analysis: papers look better.
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Reduced models: electrically excitable cells. Basic references: 1) Keener and ... Alan Lloyd Hodgkin and Andrew Huxley described the model in 1952 to explain the ...
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