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Add Hillel Wayne's two-thread counter as a first refinement example. - #248
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The refinement examples in this repository are too large to show what a refinement mapping is in a few minutes. Hillel Wayne's two-thread counter from his blog post fits on a page. TLC finds the lost update when bad.tla splits the increment into a read and a write, and verifies that good.tla, which adds a lock, refines both abstract.tla and bad.tla. good_proof.tla proves both refinements with TLAPS. https://www.hillelwayne.com/post/refinement/ Co-authored-by: Hillel Wayne <[email protected]> Co-authored-by: Claude Opus 5.5 <[email protected]> Signed-off-by: Markus Alexander Kuppe <[email protected]>
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The refinement examples in this repository are too large to show what a refinement mapping is in a few minutes. Hillel Wayne's two-thread counter from his blog post fits on a page. TLC finds the lost update when bad.tla splits the increment into a read and a write, and verifies that good.tla, which adds a lock, refines both abstract.tla and bad.tla. good_proof.tla proves both refinements with TLAPS.
https://www.hillelwayne.com/post/refinement/
/cc @hwayne