TestIntervals.bpl(25,3): Error BP5001: This assertion might not hold.
Execution trace:
    TestIntervals.bpl(7,5): anon0
    TestIntervals.bpl(8,3): anon9_LoopHead
    TestIntervals.bpl(14,14): anon10_Then
    TestIntervals.bpl(15,14): anon11_Then
    TestIntervals.bpl(16,14): anon12_Then
    TestIntervals.bpl(19,5): anon8
TestIntervals.bpl(70,3): Error BP5001: This assertion might not hold.
Execution trace:
    TestIntervals.bpl(62,3): anon0
    TestIntervals.bpl(67,3): anon3_LoopHead
    TestIntervals.bpl(67,3): anon3_LoopDone
TestIntervals.bpl(71,3): Error BP5001: This assertion might not hold.
Execution trace:
    TestIntervals.bpl(62,3): anon0
    TestIntervals.bpl(67,3): anon3_LoopHead
    TestIntervals.bpl(67,3): anon3_LoopDone

Boogie program verifier finished with 2 verified, 3 errors