Frame.dfy(23,15): Error: assertion might not hold
Frame.dfy(37,13): Error: assertion might not hold
Frame.dfy(63,22): Error: assertion might not hold
Frame.dfy(66,18): Error: insufficient reads clause to read array element; Consider extracting a[0] to a local variable before the lambda expression, or adding 'reads a' in the enclosing lambda specification for resolution
Frame.dfy(68,27): Error: insufficient reads clause to read array element; Consider adding 'reads a' in the enclosing lambda specification for resolution
Frame.dfy(120,17): Error: function precondition could not be proved
Frame.dfy(123,18): Error: assertion might not hold

Dafny program verifier finished with 6 verified, 7 errors
