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+title = "Semantics of predicates in the abstract"
+date = "2023-02-04"
+author = "Yann Herklotz"
+tags = []
+categories = []
+backlinks = ["3c3f"]
+forwardlinks = ["3c3f2"]
+zettelid = "3c3f1"
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+
+In the abstract language, which is used to verify the schedules produced
+by the scheduler, it also has to verify the equivalence of the
+predicates. However, these predicates have rich semantics, because they
+include expressions that are taken from the code during the symbolic
+evaluation. This, however, means that these predicates do not always
+evaluate to a value, as the context might not contain enough information
+to evaluate an expression. In addition to that, it's not certain that
+the expressions are free of undefined behaviour when they are evaluated
+with an arbitrary context, which would mean that a division that was
+safe in the input could suddenly become a division by 0.