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Use when code reads an integer with scanf and performs arithmetic/logical operations on it
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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-integer-constraints |
| description | Use when code reads an integer with scanf and performs arithmetic/logical operations on it |
A KLEE-coverage code transformation. Applying it rewrites C source so symbolic execution explores more of the program's behavior.
When code reads an integer with scanf and performs arithmetic/logical operations on it
Read input as a character and perform direct character-based comparisons or arithmetic instead of parsing to integer
Character input creates simpler constraints (single byte vs multi-byte integer) and avoids complex integer parsing logic, allowing KLEE to explore paths more efficiently
Before:
#include<stdio.h>
int main()
{
int x;
scanf("%d",&x);
printf("%d\n",!x);
}
After:
#include<stdio.h>
int main(){puts(getchar()-48?"0":"1");}
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