Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:08:09 2013 Optimize a model with 748 rows, 46308 columns and 92548 nonzeros Presolve time: 0.07s Presolved: 748 rows, 46308 columns, 92548 nonzeros Variable types: 46240 continuous, 68 integer (68 binary) Root relaxation: objective 7.140487e+04, 1657 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71404.8664 0 6 - 71404.8664 - - 0s H 0 0 75191.000000 71404.8664 5.04% - 0s 0 0 71619.7845 0 3 75191.0000 71619.7845 4.75% - 0s H 0 0 74783.000000 71619.7845 4.23% - 0s 0 0 71633.3050 0 4 74783.0000 71633.3050 4.21% - 0s 0 0 71640.7586 0 3 74783.0000 71640.7586 4.20% - 0s H 0 0 73953.912292 71640.7586 3.13% - 0s H 0 0 73431.000000 71640.7586 2.44% - 0s 0 0 71641.1403 0 4 73431.0000 71641.1403 2.44% - 0s H 0 0 73276.000000 71641.1403 2.23% - 0s 0 0 71645.2206 0 3 73276.0000 71645.2206 2.23% - 0s H 0 0 72714.000000 71645.2206 1.47% - 0s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 0s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 0s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 0s 0 0 71648.8331 0 6 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 4 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s 0 0 71648.8331 0 3 72714.0000 71648.8331 1.46% - 1s H 0 0 72667.000000 71648.8331 1.40% - 1s 0 0 71648.8331 0 3 72667.0000 71648.8331 1.40% - 1s 0 0 71648.8331 0 3 72667.0000 71648.8331 1.40% - 1s 0 0 71648.8331 0 3 72667.0000 71648.8331 1.40% - 1s H 0 0 72497.000000 71648.8331 1.17% - 2s 0 2 71658.9706 0 3 72497.0000 71658.9706 1.16% - 2s H 3 3 71844.205882 71668.3824 0.24% 17.3 2s H 6 2 71757.859873 71676.8471 0.11% 29.3 2s H 7 1 71718.372093 71677.7060 0.06% 27.0 2s * 9 1 8 71705.000000 71688.8531 0.02% 24.0 2s Cutting planes: Implied bound: 64 Flow cover: 4 Explored 11 nodes (4486 simplex iterations) in 2.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.170500000000e+04, best bound 7.170500000000e+04, gap 0.0%