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June 3, 2021 08:23
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Example TLA+ specification
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| ---------------------------- MODULE TwoCounters ---------------------------- | |
| EXTENDS Integers | |
| CONSTANT C, Limit | |
| VARIABLES counter | |
| Init == | |
| counter = [c \in C |-> 0] | |
| Next == | |
| \E c \in C : | |
| /\ counter[c] < Limit | |
| /\ counter' = [counter EXCEPT ![c] = counter[c] + 1] | |
| AlwaysNonNegative == | |
| \A c \in C : counter[c] > -1 | |
| AllAtLimit == | |
| \A c \in C : counter[c] = Limit | |
| EventuallyAllAtLimit == | |
| <>[]AllAtLimit | |
| ============================================================================= |
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