deepcodeappdev[bot]

## DeepCode's analysis on [#1608cf](https://www.deepcoded.com/app/gh/eth-sri/fastsmt/27e39866db0863ff38b718c211e0c9ec29d36ce1/eth-sri/fastsmt/1608cf85d4a0c11e13b0954e422ad806c2b196a8/pr/_/%2F/code/?utm_source=gh_review&c=0&w=2&i=0&) found: - :warning: **2** warnings :point_down: ## Top issues Description Example fixes The result of fopen, which may return null flows to the first argument...