[tlaplus] tlaps example

[Alex Tim <alex.timimin@xxxxxxxxx>]

Hello

I'm reading simple examples on tlaps

https://sriramsami.com/tlaps/

the author said

that the theorem

THEOREM Transitive == 
    ASSUME 
        NEW X \in Nat,
        NEW Y \in Nat,
        NEW Z \in Nat,
        X > Y,
        Y > Z
        PROVE X > Z + 1


can be proved automatically with 
PROOF OBVIOUS

but it fails for me. Should i explicitly use a nonstandard solver i.e. CVC4?

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