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Make abstract phoare proc use a >= 1#887

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oskgo wants to merge 1 commit intomainfrom
weaken-phoare-abs-proc
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Make abstract phoare proc use a >= 1#887
oskgo wants to merge 1 commit intomainfrom
weaken-phoare-abs-proc

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@oskgo oskgo commented Feb 5, 2026

I change the ground truth to be a (IMO easier to work with) variant with a >= 1 bound and instead recover the = 1 variant using conseq on the original goal and the generated side conditions.

This also means that the conseq used to link the invariant with the postcondition now generates a goal to show implication rather than equivalence, making it more consistent with abstract proc for the other program logics, improving the documentation.

This is a breaking change since it slightly changes one of the goals generated by the tactic.

@oskgo oskgo force-pushed the weaken-phoare-abs-proc branch from da4d7da to 11cfc9f Compare February 5, 2026 13:32
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