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20 lines
555 B
20 lines
555 B
\item \lect Let $a$ and $b$ be Boolean variables.
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Complete the python code with the appropriate variable declarations and constraint statements to check whether the following equivalence holds:
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$$\lnot (a \land b) = (\lnot a \lor \lnot b).$$
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\vskip1em
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\begin{pythonSourceCode}
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from z3 import *
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solver = Solver()
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a, b = Bools("a b")
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l, r = Bools("l r")
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solver.add(l == Not(And(a, b)))
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solver.add(r == Or(Not(a), Not(b)))
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solver.add(Distinct(l, r))
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result = solver.check()
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print(result)
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\end{pythonSourceCode}
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