Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:28:23 2013 Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.39s Presolved: 3500 rows, 104200 columns, 212400 nonzeros Variable types: 102200 continuous, 2000 integer (2000 binary) Root relaxation: objective 9.188392e+05, 6208 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 8 - 918839.221 - - 1s H 0 0 962180.19566 918839.221 4.50% - 1s 0 0 918952.441 0 8 962180.196 918952.441 4.49% - 2s H 0 0 940624.71500 918952.441 2.30% - 2s 0 0 918990.224 0 6 940624.715 918990.224 2.30% - 2s 0 0 918994.847 0 6 940624.715 918994.847 2.30% - 2s 0 0 918997.221 0 6 940624.715 918997.221 2.30% - 3s 0 0 918997.718 0 6 940624.715 918997.718 2.30% - 3s 0 0 918997.873 0 6 940624.715 918997.873 2.30% - 3s 0 0 918998.023 0 6 940624.715 918998.023 2.30% - 4s 0 0 918998.023 0 6 940624.715 918998.023 2.30% - 4s 0 2 918998.023 0 6 940624.715 918998.023 2.30% - 5s 16 18 919252.056 8 2 940624.715 919049.643 2.29% 261 10s * 27 23 14 924008.65682 919049.643 0.54% 267 12s H 28 6 919371.65559 919049.643 0.04% 257 12s Cutting planes: Implied bound: 12 Flow cover: 18 Explored 76 nodes (16960 simplex iterations) in 14.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193716555880e+05, best bound 9.193694974252e+05, gap 0.0002%