Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:06:00 2013 Optimize a model with 45694 rows, 45024 columns and 179694 nonzeros Presolve removed 67 rows and 0 columns Presolve time: 0.20s Presolved: 45627 rows, 45024 columns, 179627 nonzeros Variable types: 44957 continuous, 67 integer (67 binary) Root relaxation: objective 5.770938e+04, 5424 iterations, 3.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57709.3762 0 52 - 57709.3762 - - 3s H 0 0 79342.000000 57709.3762 27.3% - 4s 0 0 67174.6466 0 18 79342.0000 67174.6466 15.3% - 9s H 0 0 77504.000000 67174.6466 13.3% - 10s 0 0 68343.6282 0 8 77504.0000 68343.6282 11.8% - 11s H 0 0 76291.000000 68343.6282 10.4% - 11s 0 0 68550.3986 0 6 76291.0000 68550.3986 10.1% - 12s H 0 0 72576.205092 68550.3986 5.55% - 12s H 0 0 70199.000000 68550.3986 2.35% - 12s H 0 0 69595.584906 68550.3986 1.50% - 13s 0 2 68563.2030 0 6 69595.5849 68563.2030 1.48% - 14s H 7 6 69338.411334 68638.6669 1.01% 128 15s H 9 8 68839.185185 68638.6669 0.29% 179 15s H 10 7 68835.622642 68638.6669 0.29% 168 15s H 11 8 68830.473684 68638.6669 0.28% 157 15s * 13 8 11 68816.000000 68638.6669 0.26% 143 15s H 27 2 68784.000000 68707.5467 0.11% 144 16s * 35 2 5 68769.000000 68767.1081 0.00% 136 17s Cutting planes: Implied bound: 61 Explored 36 nodes (15528 simplex iterations) in 17.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.876900000000e+04, best bound 6.876710810811e+04, gap 0.0028%