This one was a lot better than others. For every SAT problem with 10 variables and 200 clauses it was able to find a valid satisfying assignment. Therefore, I pushed it to test with 14 variables and 100 clauses, and it got half correct among 4 instances (See files with prefix formula14_ in here). Half correct sounds like a decent performance, but it is equivalent to random guessing.
The writer has a simple interface: write(), writev() for batched writes, end() to signal completion, and abort() for errors. That's essentially it.，更多细节参见爱思助手下载最新版本
for (int i = start + gap; i < n; i += gap) {。业内人士推荐safew官方下载作为进阶阅读
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