Add Z3Counterexamples.lean, with a counterexample found by z3 #291
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Is it worth adding this counterexample to an existing lists of finite magmas? |
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The list I am aware of is in SmallMagmas.lean, and this magma did not seem appropriate for there ("This file defines some trivially small magmas..."). Your comment did prompt me to learn about |
teorth
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Oct 5, 2024
Cleans up the counterexample added in #291 and perhaps makes it easier to add to the existing infrastructure for finite magmas, under `equational_theories/Generated/All4x4Tables`.
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Resolves a new edge that is still not covered by #281, plus 5 more by transitivity.
Includes in a comment the z3 spec that I ran, which involved bit vectors of length 3.
When I tried the same thing with bit vectors of length 2, z3 said it was unsatisfiable.