Gurobi 5.0.1 (linux64) logging started Mon Nov 19 11:46:46 2012 Optimize a model with 7953 rows, 177 columns and 15906 nonzeros Presolve removed 5831 rows and 0 columns Presolve time: 0.39s Presolved: 2122 rows, 177 columns, 16205 nonzeros Variable types: 0 continuous, 177 integer (177 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 2.059021e+01, 957 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.59021 0 175 7.00000 20.59021 194% - 0s H 0 0 8.0000000 20.59021 157% - 0s 0 0 20.20804 0 177 8.00000 20.20804 153% - 0s 0 0 20.08207 0 177 8.00000 20.08207 151% - 1s H 0 0 9.0000000 20.08207 123% - 1s 0 0 19.99797 0 176 9.00000 19.99797 122% - 1s 0 0 19.95908 0 177 9.00000 19.95908 122% - 1s 0 0 19.93204 0 176 9.00000 19.93204 121% - 1s H 0 0 10.0000000 19.93204 99.3% - 1s 0 0 19.90984 0 177 10.00000 19.90984 99.1% - 2s 0 0 19.89120 0 177 10.00000 19.89120 98.9% - 2s 0 0 19.87656 0 177 10.00000 19.87656 98.8% - 2s 0 0 19.86121 0 177 10.00000 19.86121 98.6% - 2s 0 0 19.85625 0 177 10.00000 19.85625 98.6% - 3s 0 0 19.85042 0 177 10.00000 19.85042 98.5% - 3s 0 0 19.84790 0 177 10.00000 19.84790 98.5% - 3s 0 0 19.84668 0 177 10.00000 19.84668 98.5% - 3s 0 0 19.84662 0 177 10.00000 19.84662 98.5% - 4s 0 0 19.84650 0 177 10.00000 19.84650 98.5% - 4s 0 2 19.84644 0 177 10.00000 19.84644 98.5% - 5s 322 259 15.00020 9 81 10.00000 19.04017 90.4% 103 10s 574 405 15.60005 16 88 10.00000 18.21667 82.2% 96.9 15s 601 431 14.65821 15 177 10.00000 18.21667 82.2% 95.2 20s 613 441 18.21667 14 173 10.00000 18.21667 82.2% 97.9 25s 673 481 16.97442 44 144 10.00000 17.04269 70.4% 137 30s 845 525 14.41257 28 89 10.00000 16.12089 61.2% 154 35s 1299 581 13.33217 15 47 10.00000 15.57148 55.7% 119 40s 1629 624 13.93897 31 77 10.00000 15.21694 52.2% 104 45s 1853 628 14.39261 36 79 10.00000 15.03307 50.3% 96.9 50s 2391 785 11.59341 28 44 10.00000 14.47083 44.7% 85.8 55s 2967 880 cutoff 34 10.00000 13.93601 39.4% 78.9 60s 3385 893 cutoff 35 10.00000 13.34875 33.5% 76.6 65s 3966 889 11.21063 49 36 10.00000 12.73475 27.3% 72.8 70s 4562 598 11.98787 65 51 10.00000 12.07973 20.8% 68.7 75s Cutting planes: Clique: 76 Explored 5388 nodes (332491 simplex iterations) in 77.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%