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*From*: Andrew Samokish <asam.mail@xxxxxxxxx>*Date*: Tue, 23 Jan 2024 15:53:33 -0800 (PST)*References*: <ae6e7be5-6a5d-408e-8782-f75dfb225a82n@googlegroups.com>

another question with the same example:

i did change the 'next': Next == PrintT("Start") /\ (A \/ B \/ Terminating) /\ PrintT("Finish")

resulting output is:

"Start"

"Finish"

"Start"

"Finish"

"Start"

"Finish"

"Finish"

"Start"

"Finish"

"Finish"

"Start"

"Finish"

"Start"

"Finish"

"Finish"

"Start"

"Finish"

how is it possible, that I have 5 'finish' and only 4 'start' ?

среда, 24 января 2024 г. в 00:32:45 UTC+1, Andrew Samokish:

Hello Everyone.I`m new to TLA+, sorry for trivial questions ...studying session 7 in PlusCal Tutorial https://lamport.azurewebsites.net/tla/tutorial/session7.html i got TLA+ code.In short words:init: x = 0A == /\ pc[3] = "a"/\ x' = x + 1

/\ pc' = [pc EXCEPT ![3] = "Done"]B == /\ pc[-7] = "b"

/\ x' = x + 1

/\ pc' = [pc EXCEPT ![-7] = "Done"]Next = A \/ B \/ Terminatingprocesses executed once, and the resulting value of x is 2From my point of view, it could be 1 if both processes worked and finished in parallel, but it doesn`t happen.Can you please tell me what is the checker logic for this code?it executes both A and B, but the last executed overwrites pc, so first is obliged to be executed second time?or after executing first, it even doesn`t try to run second, because this condition doesn't stay: pc' = [pc EXCEPT ![-7] = "Done"] ?Sincerely yours, Andrew

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**Follow-Ups**:**Re: [tlaplus] A \/ B***From:*Markus Kuppe

**References**:**[tlaplus] A \/ B***From:*Andrew Samokish

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