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Viggnesh_kandasamy_001

# Viggnesh_kandasamy_001 - a<=b<=c<=d Sol...

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Q)Prove partial correctness Note: you must find the invariant – prove invariant correctness only for one guard. {true} (a,b,c,d) :=(A,B,C,D); loopselect a > b => swap(a, b) or b > c => swap(b, c) or c >d => swap(c, d) end loopselect; {(a,b,c,d)=permutation(A,B,C,D) and

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Unformatted text preview: a<=b<=c<=d } Sol Let {(a1,b1,c1,d1):=(a,b,c,d)} be the invariant after the loopselect statement and {(a2,b2,c2,d2):=(a,b,c,d) be the invariant exactly before the end loopselect statement....
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