Re: [tlaplus] action never enabled

Hello,

this might be an artefact of TLC evaluating formulas from left to right. Perhaps we could say more if you could share your spec (or a minimum working example if it is too big).

Regards,

Stephan

On 24 Dec 2021, at 17:59, Mark Ettinger <jettinger35@xxxxxxxxx> wrote:

TLA+ newbie here with what is probably a newbie-ish question. I'll describe it abstractly with actions A and B. My spec has the form:

Next == A \/ B
Spec == Init /\ []Next_<<vars>>

When I run TLC I get a warning "B is never enabled". If I change the ordering in Next to:

Next == B \/ A

I get the warning "A is never enabled." Am I missing something obvious about disjunction?

Thanks for any insights in advance!

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