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Show counterexample values in the final expected refinement

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难度
4/5
预计耗时
3-5 天
新手友好度
55/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
活跃
技术栈
java
领域
compilers

调研方向

Start at the refinement-error diagnostic and trace the final expected predicate used for verification through alias and state expansion and simplification. Add tests covering multiple assignments, repeated variables, aliases, and values that cannot be represented safely. Done means the original refinement and assignments remain, while the final predicate shows substituted values without reducing the informative expression.

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描述

A refinement error currently shows the original expected refinement and counterexample assignments separately. Include a readable version of the final expected predicate used for verification, after alias and state expansion and any applicable simplification, with every available counterexample value substituted.

For example:

Original expected: Positive(buffered)
Final expected:    buffered > 0
Counterexample:    buffered == 0
With witness:      0 > 0  ✗

Substitute using expression variable identities, without hardcoded alias names or text replacement. Keep the informative expression (0 > 0) rather than reducing it to false. Preserve the original expected refinement and assignments; leave values unchanged when they cannot be represented safely. Cover multiple assignments, repeated variables, and aliases in tests.

Related to #295, which covers navigating alias expansion in the diagnostic history.

主要语言
Java
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67
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36
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从这里开始

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  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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