Check frame conditions before __CPROVER_havoc_object

[feliperodri]

Signed-off-by: Felipe R. Monteiro [email protected]

• Each commit message has a non-empty body, explaining why the change was made.
• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
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[SaswatPadhi]

LGTM! Only minor comments below.

[codecov]

Codecov Report

Merging #6352 (f7ff4bf) into develop (860d60d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head f7ff4bf differs from pull request most recent head 7075866. Consider uploading reports for the commit 7075866 to get more accurate results

@@           Coverage Diff            @@
##           develop    #6352   +/-   ##
========================================
  Coverage    75.90%   75.90%           
========================================
  Files         1515     1515           
  Lines       164005   164021   +16     
========================================
+ Hits        124484   124500   +16     
  Misses       39521    39521           

Impacted Files	Coverage Δ
src/goto-instrument/contracts/contracts.cpp	94.17% <100.00%> (+0.15%)	⬆️

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