Re: [tlaplus] CostModel lookup failed

[Markus Kuppe <tlaplus-google-group@xxxxxxxxxxx>]

On 11.02.21 14:09, Isaac DeFrain wrote:
> I've been encountering this message while checking models with temporal 
> properties using the command-line version of TLC:
>
> CostModel lookup failed for expression <line #, col # to line #, col # 
> of module B>. Reporting costs into <line #, col # to line #, col # of 
> module A> instead (Safety and Liveness checking is unaffected. Please 
> report a bug.)
>
> Note: I've substituted #'s for the reported line and col numbers.
>
> Since I'm not sure what is meant by "CostModel lookup", I'm not sure 
> what details are essential to report here. If it makes any difference, 
> module A EXTENDS module B.
>
> My questions:
>    1. What is this CostModel lookup?
>    2. Is this really a bug that I should report?
>    3. Has anyone else encountered this message?


Hi Isaac,

please consider adding your spec and model to the relevant Github issue 
[1].  The warning is "mostly harmless", saying that coverage/profiling 
information will be off for the locations mentioned in the warning.

If you don't care about coverage/profiling [2], run TLC without the 
"-coverage" parameter.

Thanks,
Markus

[1] https://github.com/tlaplus/tlaplus/issues/415
[2] https://tla.msr-inria.inria.fr/tlatoolbox/doc/model/profiling.html

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