Fix profiling: use --verbosity 8 instead of 10

[tautschnig]

Verbosity 10 triggers per-step SSA output via SSA_stept::output, which calls format_rec and accounts for ~16% of the profile. This distorts the results. Verbosity 8 still captures Runtime statistics without the per-step output.

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[Copilot]

Pull request overview

Note

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This PR adjusts the profiling runner to avoid distorting profiling results by preventing CBMC from emitting expensive per-step SSA output.

Changes:

• Lower CBMC verbosity from 10 to 8 in the profiling runner to keep runtime statistics without per-step SSA output.

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[Copilot]

This introduces a new implicit tuning parameter (verbosity level) as a magic number. Consider defining a named constant (e.g., CBMC_PROFILE_VERBOSITY = 8) or making it configurable via a CLI flag/env var for the runner, so future profiling runs can adjust verbosity without editing code.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.50%. Comparing base (b32074b) to head (148f812).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8977   +/-   ##
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  Coverage    80.50%   80.50%           
========================================
  Files         1704     1704           
  Lines       188778   188778           
  Branches        73       73           
========================================
+ Hits        151975   151978    +3     
+ Misses       36803    36800    -3     

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