3-species kinetics problem

At t = 2.6391e-01      y =  9.899653e-01    3.470564e-05    1.000000e-02
    rootsfound[] =   0   1
At t = 4.0000e-01      y =  9.851641e-01    3.386242e-05    1.480205e-02
At t = 4.0000e+00      y =  9.055097e-01    2.240338e-05    9.446793e-02
At t = 4.0000e+01      y =  7.157952e-01    9.183486e-06    2.841956e-01
At t = 4.0000e+02      y =  4.505420e-01    3.222963e-06    5.494548e-01
At t = 4.0000e+03      y =  1.831878e-01    8.941319e-07    8.168113e-01
At t = 4.0000e+04      y =  3.897868e-02    1.621567e-07    9.610212e-01
At t = 4.0000e+05      y =  4.940023e-03    1.985716e-08    9.950600e-01
At t = 4.0000e+06      y =  5.165107e-04    2.067097e-09    9.994835e-01
At t = 2.0807e+07      y =  1.000000e-04    4.000395e-10    9.999000e-01
    rootsfound[] =   1   0
At t = 4.0000e+07      y =  5.201457e-05    2.080690e-10    9.999480e-01
At t = 4.0000e+08      y =  5.207182e-06    2.082883e-11    9.999948e-01
At t = 4.0000e+09      y =  5.105811e-07    2.042325e-12    9.999995e-01
At t = 4.0000e+10      y =  4.511312e-08    1.804525e-13    1.000000e-00

Final Statistics:
nst = 515    nfe  = 755    nsetups = 110    nfeLS = 0      nje = 12
nni = 751    ncfn = 0      netf = 26     nge = 543