Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:30:37 2012 Optimize a model with 555 rows, 540 columns and 1774 nonzeros Presolve removed 58 rows and 34 columns Presolve time: 0.01s Presolved: 497 rows, 506 columns, 1665 nonzeros Variable types: 336 continuous, 170 integer (170 binary) Root relaxation: objective 4.927956e+04, 253 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49279.5627 0 89 - 49279.5627 - - 0s H 0 0 76943.000000 49279.5627 36.0% - 0s 0 0 60774.7890 0 25 76943.0000 60774.7890 21.0% - 0s 0 0 61257.3965 0 26 76943.0000 61257.3965 20.4% - 0s 0 0 61408.7203 0 22 76943.0000 61408.7203 20.2% - 0s 0 0 61477.5462 0 19 76943.0000 61477.5462 20.1% - 0s 0 0 61489.4892 0 17 76943.0000 61489.4892 20.1% - 0s 0 0 61489.4892 0 16 76943.0000 61489.4892 20.1% - 0s H 0 0 62892.000000 61489.4892 2.23% - 0s 0 2 61490.8614 0 16 62892.0000 61490.8614 2.23% - 0s H 27 26 62184.000000 61490.8614 1.11% 6.6 0s * 120 81 46 62072.000000 61499.3246 0.92% 5.3 0s * 121 74 47 61998.000000 61499.3246 0.80% 5.3 0s H 600 284 61795.000000 61525.3426 0.44% 5.0 0s H 1067 251 61734.000000 61604.1548 0.21% 5.1 0s H 1200 149 61684.000000 61612.5290 0.12% 4.9 0s Cutting planes: Gomory: 5 Cover: 3 Flow cover: 44 Flow path: 9 Explored 1598 nodes (7892 simplex iterations) in 0.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.168399999999e+04, best bound 6.168126418279e+04, gap 0.0044%