I have very limited experience with NEB calculation. Just would like to know how one usually estimate (based on the runtime output) whether a NEB will achieve convergence or not. For example, if the output is as follows, should we expect a convergence or just give up?
| NEB Optimization using the LBFGS optimizer |
+------------------------------------------------------------------------------+
| Iteration Step Length Max. Force Max. Energy Image Max. Energy |
+------------------------------------------------------------------------------+
| 0 0.000e+00 8.290e+00 3 4.074025 |
| 1 1.677e-01 1.750e+00 3 2.338270 |
| 2 5.741e-02 1.806e+00 3 2.006154 |
| 3 7.919e-02 1.724e+00 3 1.740350 |
| 4 1.725e-01 1.884e+00 4 1.449709 |
| 5 1.772e-01 2.875e+00 3 1.344200 |
| 6 9.295e-02 1.463e+00 4 1.175542 |
| 7 1.124e-01 1.656e+00 4 1.041492 |
| 8 1.060e-01 1.814e+00 3 0.952107 |
| 9 8.552e-02 1.329e+00 3 0.839494 |
| 10 5.592e-02 2.038e+00 4 0.849147 |
| 11 4.137e-02 9.464e-01 4 0.726946 |
| 12 1.717e-01 2.818e+00 5 0.636764 |
| 13 6.338e-02 1.331e+00 5 0.629938 |
| 14 8.958e-02 1.144e+00 5 0.601600 |
| 15 1.613e-01 1.488e+00 5 0.554602 |
| 16 1.832e-01 1.961e+00 5 0.532888 |
| 17 1.883e-01 1.876e+00 5 0.532621 |
| 18 1.609e-01 2.334e+00 4 0.520117 |
| 19 1.114e-01 3.481e+00 5 0.434571 |
| 20 7.493e-02 4.892e+00 5 0.449733 |
| 21 1.290e-01 2.424e+00 5 0.438712 |
| 22 1.147e-01 7.662e+00 5 0.402852 |
| 23 7.109e-02 1.921e+00 5 0.392863 |
| 24 5.848e-02 1.709e+00 5 0.380071 |
| 25 1.549e-01 1.580e+00 4 0.381998 |
| 26 1.625e-01 2.766e+00 4 0.382241 |
| 27 6.413e-02 2.175e+00 4 0.393642 |
| 28 5.137e-02 1.453e+00 4 0.365978 |
| 29 1.266e-01 2.768e+00 4 0.352593 |
| 30 4.086e-02 9.296e-01 4 0.348628 |
| 31 1.287e-01 1.989e+00 4 0.339829 |
| 32 4.591e-02 1.452e+00 4 0.340066 |
| 33 7.947e-02 9.345e-01 4 0.341770 |
| 34 1.462e-01 1.747e+00 4 0.353379 |
| 35 1.292e-01 3.906e+00 4 0.381371 |
| 36 6.650e-02 2.056e+00 4 0.378206 |
| 37 8.992e-02 7.477e-01 4 0.372127 |
| 38 5.721e-02 4.661e-01 4 0.361421 |
| 39 7.983e-02 7.730e-01 4 0.342288 |
| 40 4.963e-02 8.188e-01 4 0.324326 |
| 41 4.704e-02 8.541e-01 4 0.306461 |
| 42 8.092e-02 8.304e-01 4 0.292080 |
| 43 9.223e-02 9.421e-01 4 0.287996 |
| 44 3.542e-02 6.786e-01 4 0.286875 |
| 45 6.534e-02 6.013e-01 4 0.281882 |
| 46 7.977e-02 7.766e-01 4 0.291941 |
| 47 8.681e-02 5.456e-01 4 0.289363 |
| 48 5.494e-02 5.299e-01 3 0.288635 |
| 49 3.637e-02 5.101e-01 3 0.273450 |
| 50 3.460e-02 5.031e-01 4 0.267689 |
| 51 6.985e-02 9.933e-01 4 0.265413 |
| 52 2.029e-02 5.936e-01 4 0.264947 |
| 53 3.018e-02 3.944e-01 4 0.262447 |
| 54 3.141e-02 2.750e-01 4 0.258681 |
| 55 4.305e-02 2.439e-01 4 0.256390 |
| 56 7.651e-02 3.663e-01 4 0.257563 |
| 57 2.460e-02 2.903e-01 4 0.251078 |
| 58 7.070e-02 2.161e-01 4 0.251786 |
| 59 3.378e-02 3.596e-01 4 0.252871 |
| 60 1.819e-02 2.611e-01 4 0.251387 |
| 61 1.766e-02 1.481e-01 4 0.251193 |
| 62 1.322e-02 1.567e-01 4 0.250207 |
| 63 2.475e-02 1.361e-01 4 0.249766 |
| 64 3.006e-02 2.371e-01 4 0.250092 |
| 65 7.935e-03 1.005e-01 4 0.248043 |
| 66 7.304e-03 9.936e-02 4 0.246630 |
| 67 2.141e-02 1.508e-01 4 0.244856 |
| 68 4.312e-02 4.002e-01 4 0.242708 |
| 69 5.923e-02 6.326e-01 4 0.241984 |
| 70 6.366e-02 6.439e-01 4 0.241400 |
| 71 5.622e-02 8.051e-01 4 0.238383 |
| 72 1.006e-01 6.955e-01 5 0.256355 |
| 73 3.685e-02 4.516e-01 4 0.237830 |
| 74 4.681e-02 3.641e-01 4 0.232630 |
| 75 4.393e-02 5.761e-01 4 0.224798 |
| 76 7.176e-02 1.222e+00 5 0.260728 |
| 77 5.037e-02 7.388e-01 5 0.225165 |
| 78 4.955e-02 3.884e-01 4 0.218996 |
| 79 1.978e-02 3.305e-01 4 0.212795 |
| 80 3.705e-02 3.893e-01 4 0.204375 |
| 81 1.532e-02 4.015e-01 4 0.201892 |
| 82 1.262e-02 3.243e-01 4 0.197980 |
| 83 1.170e-02 2.455e-01 4 0.194299 |
| 84 6.470e-02 5.046e-01 5 0.182382 |
| 85 4.025e-02 6.853e-01 5 0.163395 |
| 86 2.841e-02 7.090e-01 4 0.151578 |