Calculate the weakest precondition of the following program with respect to the postcondition (4 ≤ y ≤ 22). if (x < y) else x := 3y; else y := 3x; if (x <10) y 3x6; y := 2x+3; y := y 5;
Calculate the weakest precondition of the following program with respect to the postcondition (4 ≤ y ≤ 22). if (x < y) else x := 3y; else y := 3x; if (x <10) y 3x6; y := 2x+3; y := y 5;
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:Calculate the weakest precondition of the following program with respect to the
postcondition (4 ≤ y ≤ 22}.
if (x < y)
else
x := 3y;
else
y = 3x;
if (x <10)
y = 3x - 6;
= 2x+3;
y
y = y 5;
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