CVC 1.8 timeout tests failing in CI

[langston-barrett]

https://github.com/GaloisInc/what4/actions/runs/13142662183

  Timeout Tests
    valid test timeout:                            OK
    Z3
      Test itself is valid and completes (2.27 s): OK (5.09s)
      Test runs past timeout:                      OK (1.41s)
      Test with goal timeout (0.25 s):             OK (0.43s)
    CVC4
      Test itself is valid and completes (7.5 s):  OK (9.19s)
      Test runs past timeout:                      FAIL (2.87s)
        test/OnlineSolverTest.hs:463:
        Solver check query not interruptible (2.8689650130000004 s > expected 1.4 s)
        Use -p '/CVC4.Test runs past timeout/' to rerun this test only.
      Test with goal timeout (0.25 s):             AsyncCancelled
FAIL (1.66s)
        test/OnlineSolverTest.hs:485:
        solver goal timeout didn't occur
        Use -p '/CVC4.Test with goal timeout (0.25 s)/' to rerun this test only.

[RyanGlScott]

It is strange that this failure only surfaced recently. What's more, I am able to reproduce the errors locally on my machine.

A wild shot in the dark: perhaps the performance characteristics of the CI runners were once such that these CVC4-related tests would take long enough that the timeout could reliably kick in, but the performance characteristics of the CI runners are now such that this no longer occurs. (I don't have any evidence for this claim, but I'm not sure what else might be causing this.) Either way, we should redesign these tests so that they aren't quite so sensitive to the performance characteristics of individual machines.