在绘制代码线时，坚固的代码线分支向上，而柔软的代码线分支向下。

When drawing codelines, firm codelines branch upwards and soft codelines branch downwards. So looking at the picture above, we can conclude that

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确保代码分支在正确的方向上。

Take care to branch the right way on equality.

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该算法的基本思想是在粗并发分支模式的基础上生成并发分支模式，在并发分支模式生成过程中采用自底向上的方法。

The basic idea of the mining algorithm is to generate concurrent branch pattern from rough concurrent branch pattern. Bottom-up method is adopted in the process of pattern generating.

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