InterpretedFunctionTests.bpl(6,3): Error BP5001: This assertion might not hold.
Execution trace:
    InterpretedFunctionTests.bpl(4,3): anon0
InterpretedFunctionTests.bpl(12,3): Error BP5001: This assertion might not hold.
Execution trace:
    InterpretedFunctionTests.bpl(10,3): anon0
InterpretedFunctionTests.bpl(18,3): Error BP5001: This assertion might not hold.
Execution trace:
    InterpretedFunctionTests.bpl(16,3): anon0

Boogie program verifier finished with 0 verified, 3 errors