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25 lines
539 B
25 lines
539 B
\item \lect
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Given a 2-bit bitvector $x$, we want to check whether it is possible that $x + 1 < x - 1$.
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The following python script returns \texttt{sat}. Explain the error in the script and expand it such that it correctly prints \texttt{unsat}.
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\vskip7em
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\begin{pythonSourceCode}
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from z3 import *
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solver = Solver()
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bvX = BitVec("bvX", 2)
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solver.add(bvX + 1 < bvX - 1)
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result = solver.check()
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print(result)
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if result == sat:
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print(solver.model())
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\end{pythonSourceCode}
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