DieHardest: compare jug configurations via self-composition#199
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DieHardest: compare jug configurations via self-composition#199
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Add DieHardest.tla, which composes two instances of DieHarder in parallel (synchronous composition) so that TLC can check a 2-hyperproperty as an ordinary invariant. The invariant NotSolved holds as long as both configurations have not yet reached the Goal; a counterexample is a behavior in which both solve the problem, revealing which configuration is slower. The module also defines HasSolution, a GCD-based predicate (via Bézout's identity) used in ASSUME to reject unsolvable configurations before model checking begins. MCDieHardest instantiates the spec with Goal = 4, comparing a 2-jug (5, 3) setup against a 3-jug (5, 3, 4) setup. Co-authored-by: Dmitry Kulagin <craft095@users.noreply.github.com> Signed-off-by: Markus Alexander Kuppe <github.com@lemmster.de>
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Add DieHardest.tla, which composes two instances of DieHarder in parallel (synchronous composition) so that TLC can check a 2-hyperproperty as an ordinary invariant. The invariant NotSolved holds as long as both configurations have not yet reached the Goal; a counterexample is a behavior in which both solve the problem, revealing which configuration is slower.
The module also defines HasSolution, a GCD-based predicate (via Bézout's identity) used in ASSUME to reject unsolvable configurations before model checking begins.
MCDieHardest instantiates the spec with Goal = 4, comparing a 2-jug (5, 3) setup against a 3-jug (5, 3, 4) setup.