CERT 8687 Realistic example #167
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johspaeth
reviewed
May 27, 2025
| ## Key Points | ||
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| - **Old semantics**: Using `requireInvariant` in non-boundary contexts (e.g., hooks, summaries) could lead to false verification results. The invariant might be incorrectly considered satisfied inline, missing real violations. | ||
| - **New semantics**: `requireInvariant` is enforced only at valid rule boundaries (e.g., after function calls, subcalls, or havocs if `strong`). This ensures that violations are properly detected. |
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@nd-certora I'd like to double check what happens in the case of a strong invariant that is havoced, do you have a good example here? I attempted to create one for testing but wasn't yet succeeding. Do you have an idea?
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https://certora.atlassian.net/browse/CERT-8687
Note We need to adjust the example as the invariant is currently violated in both semantic versions.
@nd-certora let me know how to fix it.