NullaryMaps.bpl(30,3): Error BP5001: This assertion might not hold.
Execution trace:
    NullaryMaps.bpl(30,3): anon0
NullaryMaps.bpl(32,3): Error BP5001: This assertion might not hold.
Execution trace:
    NullaryMaps.bpl(30,3): anon0
NullaryMaps.bpl(38,3): Error BP5001: This assertion might not hold.
Execution trace:
    NullaryMaps.bpl(38,3): anon0

Boogie program verifier finished with 2 verified, 3 errors