Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:48:29 2013 Optimize a model with 704 rows, 41024 columns and 81984 nonzeros Presolve time: 0.06s Presolved: 704 rows, 41024 columns, 81984 nonzeros Variable types: 40960 continuous, 64 integer (64 binary) Root relaxation: objective 6.756115e+04, 1634 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67561.1489 0 4 - 67561.1489 - - 0s H 0 0 70644.000000 67561.1489 4.36% - 0s 0 0 67612.6734 0 3 70644.0000 67612.6734 4.29% - 0s 0 0 67622.7789 0 2 70644.0000 67622.7789 4.28% - 0s H 0 0 70139.196560 67622.7789 3.59% - 0s H 0 0 69867.000000 67622.7789 3.21% - 0s 0 0 67630.5378 0 2 69867.0000 67630.5378 3.20% - 0s 0 0 67635.8894 0 2 69867.0000 67635.8894 3.19% - 0s 0 0 67636.3235 0 2 69867.0000 67636.3235 3.19% - 0s 0 0 67637.2797 0 2 69867.0000 67637.2797 3.19% - 0s 0 0 67637.2797 0 2 69867.0000 67637.2797 3.19% - 0s 0 0 67637.2797 0 2 69867.0000 67637.2797 3.19% - 0s 0 0 67637.6446 0 2 69867.0000 67637.6446 3.19% - 0s 0 0 67637.7335 0 2 69867.0000 67637.7335 3.19% - 0s H 0 0 68043.000000 67637.7335 0.60% - 1s 0 0 67637.7335 0 4 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 3 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 0 67637.7335 0 2 68043.0000 67637.7335 0.60% - 1s 0 2 67638.6497 0 2 68043.0000 67638.6497 0.59% - 1s H 11 6 68041.000000 67771.2431 0.40% 48.1 2s H 13 6 68017.000000 67771.2431 0.36% 46.5 2s * 14 6 12 67954.000000 67771.2431 0.27% 47.5 2s Cutting planes: Implied bound: 66 Flow cover: 3 Explored 42 nodes (5767 simplex iterations) in 2.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.795400000000e+04, best bound 6.795400000000e+04, gap 0.0%