source:
CIVL/mods/dev.civl.com/examples/experimental/loopInvariants.c@
cb4d4f4
| Last change on this file since cb4d4f4 was aad342c, checked in by , 3 years ago | |
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| File size: 261 bytes | |
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| 1 | #include <assert.h> |
| 2 | #include <civlc.cvh> |
| 3 | |
| 4 | $input int n; |
| 5 | $input int m; |
| 6 | $assume(n > m && m > 0); |
| 7 | int main() { |
| 8 | int i = 0; |
| 9 | int x = 0; |
| 10 | |
| 11 | /*@ loop invariant x * 2 == i * (i + 1); |
| 12 | */ |
| 13 | while (i < n) |
| 14 | x += (i++); |
| 15 | assert(2 * x == n * (n - 1)); |
| 16 | return 0; |
| 17 | } |
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