[#1] INFO:Fitting -- RooAbsPdf::fitTo(pol3_over_pol3_Int[x]) fixing normalization set for coefficient determination to observables in data
[#1] INFO:Fitting -- using generic CPU library compiled with no vectorizations
[#1] INFO:Fitting -- Creation of NLL object took 573.162 μs
[#1] INFO:Fitting -- RooAddition::defaultErrorLevel(nll_pol3_over_pol3_Int[x]_pol3Data) Summation contains a RooNLLVar, using its error level
[#1] INFO:Minimization -- [fitFCN] No discrete parameters, performing continuous minimization only
[#0] ERROR:Minimization -- RooMinimizer: all function calls during minimization gave invalid NLL values!
[#0] ERROR:Minimization -- RooMinimizer::calculateHessErrors() Error when calculating Hessian
[#0] ERROR:Minimization -- RooMinimizer: all function calls during minimization gave invalid NLL values!
[#0] ERROR:Eval -- RooAbsReal::logEvalError(pol3) evaluation error, 
 origin       : RooPolynomial::pol3[ x=x coefList=(a1,a2,a3) ]
 message      : p.d.f normalization integral is zero or negative: -2220.000000
 server values: x=x=0, coefList=(a1 = 10 +/- 0,a2 = -1 +/- 0,a3 = 0.01)



-------------- Starting second fit ---------------


[#1] INFO:Fitting -- RooAbsPdf::fitTo(pol3_over_pol3_Int[x]) fixing normalization set for coefficient determination to observables in data
[#1] INFO:Fitting -- Creation of NLL object took 108.56 μs
[#1] INFO:Fitting -- RooAddition::defaultErrorLevel(nll_pol3_over_pol3_Int[x]_pol3Data) Summation contains a RooNLLVar, using its error level
[#1] INFO:Minimization -- [fitFCN] No discrete parameters, performing continuous minimization only
Minuit2Minimizer: Minimize with max-calls 1000 convergence for edm < 1 strategy 1
Minuit2Minimizer : Valid minimum - status = 0
FVAL  = -1002.22625947982669
Edm   = 8.90543439440185486e-08
Nfcn  = 245
a1	  = -0.498159	 +/-  0.0227243	(limited)
a2	  = 0.198318	 +/-  0.00564924	(limited)

  RooFitResult: minimized FCN value: 0, estimated distance to minimum: 0
                covariance matrix quality: Not calculated at all
                Status : MINIMIZE=-1 HESSE=302 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1    1.0000e+01 +/-  0.00e+00
                    a2   -1.0000e+00 +/-  0.00e+00

Without recovery, the fitter encountered 23 invalid function values. The parameters are unchanged.

  RooFitResult: minimized FCN value: 29650.9, estimated distance to minimum: 8.92102e-08
                covariance matrix quality: Full, accurate covariance matrix
                Status : MINIMIZE=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1   -4.9816e-01 +/-  2.27e-02
                    a2    1.9832e-01 +/-  5.65e-03

With recovery, the fitter encountered 77 invalid function values, but the parameters are fitted.