float11.bpl(21,2): Error BP5001: This assertion might not hold.
Execution trace:
    float11.bpl(12,7): anon0
    float11.bpl(16,2): anon3_LoopHead
    float11.bpl(16,2): anon3_LoopDone

Boogie program verifier finished with 0 verified, 1 error