Gurobi 5.0.1 (linux64) logging started Wed Apr 24 14:50:19 2013 Optimize a model with 3190 rows, 841290 columns and 1682290 nonzeros Presolve removed 0 rows and 0 columns (presolve time = 5s) ... Presolve time: 6.28s Presolved: 3190 rows, 841290 columns, 1682290 nonzeros Variable types: 841000 continuous, 290 integer (290 binary) Starting sifting (using dual simplex for sub-problems)... Iter Pivots Primal Obj Dual Obj Time 0 0 infinity 4.8870000e+04 0s 1 13819 1.5627000e+10 6.6467936e+04 0s 2 23649 1.2529266e+08 6.7841706e+04 1s 3 30751 1.2402425e+06 8.2502250e+04 1s 4 40200 8.6398602e+05 1.0720648e+05 1s 5 53360 8.1503284e+05 2.5859379e+05 1s 6 66891 7.8949757e+05 5.3757446e+05 2s 7 77969 7.8877786e+05 7.4611608e+05 2s Sifting complete Root relaxation: objective 7.887689e+05, 86103 iterations, 2.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 788768.862 0 5 - 788768.862 - - 9s H 0 0 832253.00000 788768.862 5.22% - 10s H 0 0 795944.00000 788768.862 0.90% - 13s 0 0 789062.064 0 4 795944.000 789062.064 0.86% - 15s 0 0 789062.064 0 5 795944.000 789062.064 0.86% - 23s 0 0 789063.638 0 4 795944.000 789063.638 0.86% - 26s 0 0 789081.759 0 4 795944.000 789081.759 0.86% - 28s 0 0 789084.130 0 3 795944.000 789084.130 0.86% - 29s 0 0 789084.130 0 3 795944.000 789084.130 0.86% - 30s 0 0 789084.130 0 3 795944.000 789084.130 0.86% - 31s 0 0 789084.130 0 3 795944.000 789084.130 0.86% - 32s 0 0 789084.130 0 3 795944.000 789084.130 0.86% - 33s 0 2 789095.077 0 3 795944.000 789095.077 0.86% - 38s 2 5 789236.057 2 1 795944.000 789214.329 0.85% 427 41s 4 6 789343.428 3 1 795944.000 789256.934 0.84% 474 45s H 10 9 790872.70787 789256.934 0.20% 266 50s 16 13 790129.955 13 1 790872.708 789256.934 0.20% 263 55s H 20 14 790694.00000 789256.934 0.18% 227 57s * 25 14 20 790640.00000 789256.934 0.17% 192 58s 28 15 789588.779 4 2 790640.000 789304.760 0.17% 201 60s 38 15 790023.011 8 1 790640.000 789385.698 0.16% 226 65s 45 19 790572.667 5 2 790640.000 789512.679 0.14% 267 71s 54 16 cutoff 3 790640.000 789674.654 0.12% 263 75s H 61 9 790486.00000 789693.305 0.10% 242 76s H 65 11 790409.00000 789693.305 0.09% 229 77s * 70 10 17 790383.00000 789693.305 0.09% 213 77s 76 6 790030.941 9 1 790383.000 790016.264 0.05% 223 81s 83 4 790277.000 4 1 790383.000 790277.000 0.01% 228 85s * 84 2 5 790286.00000 790277.000 0.00% 226 85s Cutting planes: Implied bound: 183 Flow cover: 14 Explored 85 nodes (123642 simplex iterations) in 85.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.902860000000e+05, best bound 7.902770000000e+05, gap 0.0011%