* Fix an issue in a proof of the hashmap

* Improve scalar_decr_tac

* Improve the error message of scalar_tac and add the missing Termination.lean

* Make progress on the proofs of the hashmap

* Make a minor modification to the hashmap

* Make progress on the hashmap

* Make progress on the proofs

* Make progress on the proofs

* Make progress on the proof of the hashmap

* Progress on the proofs of the hashmap

* Update a proof

* Update the Charon pin

* Make minor modifications to the hashmap

* Regenerate the tests

* Regenerate the hashmap

* Add lemmas to the Lean backend

* Make progress on the proofs of the hashmap

* Make a minor fix

* Finish the proof about the hashmap

* Update scalar_tac

* Make a minor modification in the hashmap

* Update the proofs of the hashmap

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Co-authored-by: Son Ho <sonho@Sons-MacBook-Pro.local>
Co-authored-by: Son Ho <sonho@Sons-MBP.lan>