Hackeython smt mod

[BookWood7th]

Intended Change

SMT-Translation translates mod as an uninterpreted symbol.
As div is translated as is, and SMT has an axiom stating a = a div b * b + a mod b. mod in SMT will be the same as in KeY.

Type of pull request

• Bug fix (non-breaking change which fixes an issue)
• Refactoring (behaviour should not change or only minimally change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• There are changes to the (Java) code
• There are changes to the taclet rule base
• There are changes to the deployment/CI infrastructure (gradle, github, ...)
• Other:

Ensuring quality

• I made sure that introduced/changed code is well documented (javadoc and inline comments).
• I made sure that new/changed end-user features are well documented (https://github.com/KeYProject/key-docs).
• I added new test case(s) for new functionality.
• I have tested the feature as follows: 5/2 -5/2 5/-2 -5/-2 and checking that mod is nonnegative and x mod y < |y|
• I have checked that runtime performance has not deteriorated.

Additional information and contact(s)

The contributions within this pull request are licensed under GPLv2 (only) for inclusion in KeY.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.77%. Comparing base (1fb0c10) to head (d15f5d3).
Report is 13 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3418      +/-   ##
============================================
- Coverage     37.77%   37.77%   -0.01%     
  Complexity    17031    17031              
============================================
  Files          2076     2076              
  Lines        126950   126951       +1     
  Branches      21381    21381              
============================================
  Hits          47952    47952              
  Misses        73092    73092              
- Partials       5906     5907       +1     

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[WolframPfeifer]

Thanks for adding modulo support to the SMT translation, and in particular also for adding the test!