qu
This command allows to leave the interactive prover.
If the current proof state has changed since its loading or if the command line has been modified, the prover will ask the user if he wants to save the new command line before quitting.
A proof task has been performed on a current proof obligation. The user wishes to quit the current interactive proof session. The prover asks the user if he wishes to save the proof work of the last proof obligation used.
PRI> qu Last PO does not have a saved demo. Your new demo does not Prove. Do you want to save the new demo (will replace the old one)? Answer No to continue without saving (any other word to save):
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