Datatypes.dfy(82,19): Error: assertion might not hold
Datatypes.dfy(170,15): Error: assertion might not hold
Datatypes.dfy(172,15): Error: assertion might not hold
Datatypes.dfy(201,12): Error: destructor 'Car' can only be applied to datatype values constructed by 'XCons'
Datatypes.dfy(204,16): Error: destructor 'Car' can only be applied to datatype values constructed by 'XCons'
Datatypes.dfy(225,16): Error: destructor 'c' can only be applied to datatype values constructed by 'T''
Datatypes.dfy(297,9): Error: a postcondition could not be proved on this return path
Datatypes.dfy(295,14): Related location: this is the postcondition that could not be proved
Datatypes.dfy(298,11): Error: missing case in match expression: Appendix(_)
Datatypes.dfy(349,4): Error: missing case in match expression: Cons(_, _)
Datatypes.dfy(349,4): Error: missing case in match expression: Nil
Datatypes.dfy(356,7): Error: missing case in match expression: Cons(_, _)
Datatypes.dfy(356,7): Error: missing case in match expression: Nil
Datatypes.dfy(377,21): Error: RHS is not certain to look like the pattern 'AAA'

Dafny program verifier finished with 28 verified, 13 errors
