Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:24:39 2013 Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.35s Presolved: 3500 rows, 104200 columns, 212400 nonzeros Variable types: 102200 continuous, 2000 integer (2000 binary) Root relaxation: objective 9.481640e+05, 7913 iterations, 0.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 948163.962 0 8 - 948163.962 - - 1s 0 0 948322.766 0 8 - 948322.766 - - 2s 0 0 948364.572 0 8 - 948364.572 - - 2s 0 0 948368.106 0 8 - 948368.106 - - 2s 0 0 948371.755 0 8 - 948371.755 - - 3s 0 0 948381.737 0 8 - 948381.737 - - 3s 0 0 948382.331 0 8 - 948382.331 - - 3s 0 0 948382.331 0 8 - 948382.331 - - 3s 0 0 948382.331 0 8 - 948382.331 - - 4s 0 0 948382.331 0 8 - 948382.331 - - 4s 0 0 948382.331 0 8 - 948382.331 - - 5s H 0 0 983075.33122 948382.331 3.53% - 5s 0 2 948382.331 0 8 983075.331 948382.331 3.53% - 6s 11 13 949694.872 6 4 983075.331 948634.310 3.50% 402 10s H 27 11 950896.34562 948634.310 0.24% 365 14s 29 10 949728.746 15 2 950896.346 948634.310 0.24% 342 15s * 45 8 29 950276.23626 948634.310 0.17% 232 16s 84 4 949826.952 23 2 950276.236 949787.291 0.05% 179 20s 166 4 950240.091 105 2 950276.236 949787.291 0.05% 93.2 25s Cutting planes: Implied bound: 10 Flow cover: 15 Explored 173 nodes (26195 simplex iterations) in 25.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.502762362556e+05, best bound 9.502059930357e+05, gap 0.0074%