8000 🐛 Exact SiDB simulator equivalence · Issue #651 · cda-tum/fiction · GitHub
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🐛 Exact SiDB simulator equivalence #651
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@wlambooy

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@wlambooy

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Description

On #390 , the equivalence_checking_exact_simulation.cpp experiment is adjusted so that it also compares ClusterComplete simulation results with ExGS. Running the experiment shows the following:

QuickExact non equivalent layouts = 12
ClusterComplete non equivalent layouts = 0

The reason for this non-equivalence has to do with an edge case that occurs when the local potential of the dependent cell is within POP_STABILITY_ERROR of a charge transition threshold. That is, when V_depcell in [mu- - e, mu- + e] U [mu+ - e, mu+ + e].

There are two test cases that need to be adjusted to reflect the behaviour of ExGS (as a reference exact simulator). I believe these are "Test case 4" and "Test case 7". In #390 , these test cases in clustercomplete.cpp have been commented out.

Expected behavior

Running the equivalence_checking_exact_simulation.cpp experiment returns:

QuickExact non equivalent layouts = 0
ClusterComplete non equivalent layouts = 0

How to Reproduce

Running the equivalence_checking_exact_simulation.cpp experiment on #390 shows the abberant behaviour.

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