Improve SideEffectAnalysis precision using context-sensitive information and more efficient algorithms

[jjppp]

This PR is intended to resolve #195

Progress

• Use CSCallGraph instead of CallGraph in SideEffectAnalysis
• Introduce UnmodifiableGraph CachedCallGraph for better performance
• Optimize SCC for better performance
• Optimize TopologicalSorter for better performance
• Comprehensively test the implementation

[codecov]

Codecov Report

❌ Patch coverage is 84.24658% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.74%. Comparing base (523aec2) to head (65c68a4).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...scal/taie/analysis/sideeffect/CachedCallGraph.java	40.00%	21 Missing ⚠️
...c/main/java/pascal/taie/util/graph/MergedNode.java	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #196      +/-   ##
============================================
+ Coverage     75.67%   75.74%   +0.07%     
- Complexity     4626     4647      +21     
============================================
  Files           480      481       +1     
  Lines         15928    16019      +91     
  Branches       2183     2195      +12     
============================================
+ Hits          12053    12134      +81     
- Misses         3008     3015       +7     
- Partials        867      870       +3     

Files with missing lines	Coverage Δ
...va/pascal/taie/analysis/sideeffect/SideEffect.java	95.23% <100.00%> (+0.50%)	⬆️
...l/taie/analysis/sideeffect/SideEffectAnalysis.java	100.00% <100.00%> (ø)
...al/taie/analysis/sideeffect/TopologicalSolver.java	100.00% <100.00%> (ø)
src/main/java/pascal/taie/util/graph/SCC.java	98.50% <100.00%> (+0.14%)	⬆️
...c/main/java/pascal/taie/util/graph/MergedNode.java	75.00% <50.00%> (-6.82%)	⬇️
...scal/taie/analysis/sideeffect/CachedCallGraph.java	40.00% <40.00%> (ø)

... and 7 files with indirect coverage changes

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[jjppp]

The only-app option for SideEffectAnalysis seems not well-defined for merged objects. Currently an object is said to be app if it is allocated in an application method.

However, when two objects allocated in lib and app are merged, the representative element of the merged object is chosen non-deterministically. This makes MergedObj.getContainerMethod() also non-deterministic, and affects the results when only-app is set to true.