File: main.c

package info (click to toggle)
cbmc 6.6.0-4
  • links: PTS
  • area: main
  • in suites: forky, sid, trixie
  • size: 153,852 kB
  • sloc: cpp: 386,459; ansic: 114,466; java: 28,405; python: 6,003; yacc: 4,552; makefile: 4,041; lex: 2,487; xml: 2,388; sh: 2,050; perl: 557; pascal: 184; javascript: 163; ada: 36
file content (38 lines) | stat: -rw-r--r-- 693 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
#include <stdlib.h>

#define MAX_LEN 8

// clang-format off
int f1(int *arr, int len)
  __CPROVER_requires(__CPROVER_forall {
    int i;
    // constant bounds for explicit unrolling with SAT backend
    (0 <= i && i < MAX_LEN) ==> (
      // actual symbolic bound for `i`
      i < len ==> arr[i] == 0
    )
  })
  __CPROVER_ensures(__CPROVER_forall {
    int i;
    // positive context, so symbolic bounds are fine
    (0 <= i && i < len) ==> arr[i] == 0
  })
// clang-format on
{
  return 0;
}

int main()
{
  int len;
  __CPROVER_assume(0 <= len && len <= MAX_LEN);

  int *arr = malloc(len);
  for(int i = 0; i < MAX_LEN; ++i)
  {
    if(i < len)
      arr[i] = 0;
  }

  f1(arr, len);
}