Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:40:30 2013 Optimize a model with 682 rows, 38502 columns and 76942 nonzeros Presolve time: 0.05s Presolved: 682 rows, 38502 columns, 76942 nonzeros Variable types: 38440 continuous, 62 integer (62 binary) Root relaxation: objective 6.671672e+04, 1474 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66716.7224 0 9 - 66716.7224 - - 0s H 0 0 69798.000000 66716.7224 4.41% - 0s 0 0 67022.4992 0 7 69798.0000 67022.4992 3.98% - 0s 0 0 67077.4623 0 8 69798.0000 67077.4623 3.90% - 0s 0 0 67094.2481 0 8 69798.0000 67094.2481 3.87% - 0s 0 0 67098.7600 0 7 69798.0000 67098.7600 3.87% - 0s 0 0 67099.9162 0 8 69798.0000 67099.9162 3.87% - 0s 0 0 67101.4337 0 8 69798.0000 67101.4337 3.86% - 0s 0 0 67101.4337 0 8 69798.0000 67101.4337 3.86% - 0s 0 0 67101.4337 0 8 69798.0000 67101.4337 3.86% - 0s H 0 0 67857.000000 67101.4337 1.11% - 0s H 0 0 67456.000000 67101.4337 0.53% - 1s 0 0 67101.4337 0 9 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 7 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 8 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 7 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 8 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 8 67456.0000 67101.4337 0.53% - 1s 0 0 67101.4337 0 9 67456.0000 67101.4337 0.53% - 1s 0 0 67101.5579 0 8 67456.0000 67101.5579 0.53% - 1s 0 0 67101.5579 0 8 67456.0000 67101.5579 0.53% - 1s 0 2 67143.8297 0 8 67456.0000 67143.8297 0.46% - 1s * 6 4 6 67290.000000 67242.7175 0.07% 42.2 1s Cutting planes: Implied bound: 103 Flow cover: 10 Explored 11 nodes (3917 simplex iterations) in 1.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.729000000000e+04, best bound 6.729000000000e+04, gap 0.0%