[tlaplus] Re: How can I modelcheck an angle-bracket action formula?

[Andrew Helwer <andrew.helwer@xxxxxxxxx>]

Also it seems like monospace fonts are now broken on google groups, anybody else have this problem? Or perhaps it is only mixing monospace and ordinary fonts; I will experiment by making this entire message monospace.

On Wednesday, January 18, 2023 at 10:50:48 AM UTC-5 Andrew Helwer wrote:

Given this spec:

---- MODULE Test ----
EXTENDS Naturals
VARIABLE x
Init == x = 10
Next == IF x > 0 THEN x' = x - 1 ELSE UNCHANGED x
Monotonic == []<<x > 0 => x' < x>>_x
====

And this model:

INIT Init
NEXT Next
PROPERTY Monotonic

TLC gives this error:

*** Errors: 1

line 6, col 14 to line 6, col 27 of module Test

[] followed by action not of form [A]_v.

Does TLC only support [][A]_v, not []<<A>>_v?

-- 
You received this message because you are subscribed to the Google Groups "tlaplus" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tlaplus+unsubscribe@xxxxxxxxxxxxxxxx.
To view this discussion on the web visit https://groups.google.com/d/msgid/tlaplus/478e06a2-75f9-47bb-b4a8-4eb1ee614e16n%40googlegroups.com.