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Scanning functions without CFG information as well as the detection of authentication oracles requires introducing more classes related to register state analysis. To make the future code easier to understand, rename several classes beforehand. To detect authentication oracles, one has to query the properties of *output* operands of authentication instructions *after* the instruction is executed - this requires adding another analysis that iterates over the instructions in reverse order, and a corresponding state class. As the main difference of the existing `State` class is that it stores the properties of source register operands of the instructions before the instruction's execution, rename it to `SrcState` and `PacRetAnalysis` to `SrcSafetyAnalysis`. Apply minor adjustments to the debug output along the way.
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