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Avoid splitting a nonexistent B-tree root parent #239

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Avoid splitting a nonexistent B-tree root parent #239

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2 changes: 1 addition & 1 deletion specifications/btree/btree.tla
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Original file line number Diff line number Diff line change
Expand Up @@ -173,7 +173,7 @@ ParentOf(n) == CHOOSE p \in Nodes: \/ \E k \in Keys: n = childOf[p, k]
WhichToSplit ==
LET node == Head(toSplit)
parent == ParentOf(node)
splitParent == AtMaxOccupancy(parent)
splitParent == IF node = root THEN FALSE ELSE AtMaxOccupancy(parent)
noMoreSplits == ~splitParent \* if the parent doesn't need splitting, we don't need to consider more nodes for splitting
IN /\ state = WHICH_TO_SPLIT
/\ toSplit' =
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