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Use when intermediate variables are used to store simple arithmetic expressions before using them in conditional statements
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基于 SOC 职业分类
Use when printf statements output strings without trailing newlines
Use when array is accessed with direct user input as index (0-based indexing)
Use when the program accesses a precomputed table using an offset (e.g., arr[n-1]) that introduces an arithmetic operation between the symbolic input and the index
Use when loop variables iterate over character values (e.g., ASCII codes) to represent different operations or choices
Use when code uses a loop to search for an input value in an array and then uses the found index for further computation
Use when code reads a fixed number of characters into an array and only accesses individual elements
| name | avoid-intermediate-variables |
| description | Use when intermediate variables are used to store simple arithmetic expressions before using them in conditional statements |
A KLEE-coverage code transformation. Applying it rewrites C source so symbolic execution explores more of the program's behavior.
When intermediate variables are used to store simple arithmetic expressions before using them in conditional statements
Inline the arithmetic expressions directly into the conditional statements instead of storing them in intermediate variables
KLEE can more efficiently reason about constraints when expressions are used directly in conditionals, as it avoids creating additional symbolic variables and simplifies the constraint solving process
Before:
#include<stdio.h>
int main(void)
{
int a,b,c;
scanf("%d %d",&a,&b);
c=a+b;
if(c%3==0||a%3==0||b%3==0) printf("Possible\n");
else printf("Impossible\n");
return 0;
}
After:
#include <stdio.h>
int main()
{
int A,B;
scanf("%d%d",&A,&B);
if((A%3==0)||(B%3==0)||((A+B)%3==0))
printf("Possible");
else
printf("Impossible");
}
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