Gurobi 5.0.1 (linux64) logging started Wed Apr 24 11:55:26 2013 Optimize a model with 226650 rows, 225150 columns and 900150 nonzeros Presolve removed 8972 rows and 0 columns Presolve time: 2.30s Presolved: 217678 rows, 225150 columns, 882206 nonzeros Variable types: 225000 continuous, 150 integer (150 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 21668 1.4240436e+05 3.910661e+04 0.000000e+00 5s 29466 1.7333224e+05 6.456227e+04 0.000000e+00 10s 36803 2.2793512e+05 3.745696e+04 0.000000e+00 15s 41863 2.4834664e+05 1.066635e+04 0.000000e+00 20s 46670 2.5499065e+05 8.080278e+03 0.000000e+00 25s 50465 2.5684624e+05 1.346143e+03 0.000000e+00 30s 51865 2.5708152e+05 0.000000e+00 0.000000e+00 33s Root relaxation: objective 2.570815e+05, 51865 iterations, 33.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 257081.521 0 4 - 257081.521 - - 36s H 0 0 261055.00000 257081.521 1.52% - 38s 0 0 257083.506 0 5 261055.000 257083.506 1.52% - 40s 0 0 257083.803 0 5 261055.000 257083.803 1.52% - 42s 0 0 257083.820 0 6 261055.000 257083.820 1.52% - 44s 0 0 257083.820 0 6 261055.000 257083.820 1.52% - 47s 0 2 257102.660 0 6 261055.000 257102.660 1.51% - 65s 1 3 257343.547 1 3 261055.000 257243.819 1.46% 1488 70s 4 6 257580.640 3 4 261055.000 257349.474 1.42% 1508 76s H 7 7 257780.69841 257349.474 0.17% 1088 79s H 8 8 257767.00000 257349.474 0.16% 1020 79s 9 10 257588.538 7 1 257767.000 257349.474 0.16% 919 80s * 11 10 9 257670.00000 257349.474 0.12% 768 80s 19 6 257642.294 2 2 257670.000 257589.596 0.03% 702 87s Cutting planes: Gomory: 1 Flow cover: 7 Explored 29 nodes (66848 simplex iterations) in 89.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.576700000000e+05, best bound 2.576700000000e+05, gap 0.0%