Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:17:27 2013 Optimize a model with 1200 rows, 26600 columns and 54050 nonzeros Presolve removed 100 rows and 150 columns Presolve time: 0.15s Presolved: 1100 rows, 26450 columns, 52900 nonzeros Variable types: 26000 continuous, 450 integer (450 binary) Root relaxation: objective 1.824192e+05, 2770 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 182419.206 0 1 - 182419.206 - - 0s H 0 0 191688.51045 182419.206 4.84% - 0s 0 0 182445.503 0 2 191688.510 182445.503 4.82% - 0s 0 0 182460.880 0 2 191688.510 182460.880 4.81% - 0s 0 0 182472.417 0 2 191688.510 182472.417 4.81% - 0s 0 0 182478.644 0 2 191688.510 182478.644 4.80% - 0s 0 0 182483.096 0 2 191688.510 182483.096 4.80% - 0s 0 0 182486.061 0 2 191688.510 182486.061 4.80% - 0s 0 0 182488.496 0 2 191688.510 182488.496 4.80% - 0s 0 0 182493.003 0 2 191688.510 182493.003 4.80% - 0s 0 0 182493.810 0 2 191688.510 182493.810 4.80% - 0s 0 0 182494.835 0 2 191688.510 182494.835 4.80% - 0s 0 0 182495.378 0 2 191688.510 182495.378 4.80% - 0s 0 0 182498.378 0 2 191688.510 182498.378 4.79% - 0s 0 0 182498.658 0 2 191688.510 182498.658 4.79% - 0s 0 0 182499.117 0 3 191688.510 182499.117 4.79% - 1s 0 0 182499.177 0 2 191688.510 182499.177 4.79% - 1s 0 0 182500.046 0 3 191688.510 182500.046 4.79% - 1s 0 0 182501.977 0 2 191688.510 182501.977 4.79% - 1s 0 0 182501.977 0 2 191688.510 182501.977 4.79% - 1s 0 2 182505.914 0 2 191688.510 182505.914 4.79% - 1s H 27 21 184001.20915 182701.496 0.71% 23.5 1s H 54 20 183446.17215 182701.496 0.41% 14.9 2s * 135 5 13 182879.22514 182790.803 0.05% 8.4 2s Cutting planes: Flow cover: 18 Explored 139 nodes (4409 simplex iterations) in 2.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.828792251419e+05, best bound 1.828778660869e+05, gap 0.0007%