Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:10:56 2012 Optimize a model with 570 rows, 540 columns and 1791 nonzeros Presolve removed 21 rows and 13 columns Presolve time: 0.01s Presolved: 549 rows, 527 columns, 1739 nonzeros Variable types: 352 continuous, 175 integer (175 binary) Root relaxation: objective 4.945731e+04, 266 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49457.3129 0 83 - 49457.3129 - - 0s H 0 0 79541.000000 49457.3129 37.8% - 0s 0 0 58124.3963 0 38 79541.0000 58124.3963 26.9% - 0s 0 0 58479.6395 0 8 79541.0000 58479.6395 26.5% - 0s 0 0 58549.5324 0 5 79541.0000 58549.5324 26.4% - 0s 0 0 58550.8540 0 8 79541.0000 58550.8540 26.4% - 0s H 0 0 59055.000000 58550.8540 0.85% - 0s 0 2 58558.1122 0 8 59055.0000 58558.1122 0.84% - 0s H 6 6 58942.000000 58572.6616 0.63% 2.0 0s * 10 6 7 58832.000000 58572.6616 0.44% 1.8 0s * 17 7 5 58831.000000 58585.2202 0.42% 1.9 0s * 20 6 5 58754.000000 58585.2202 0.29% 1.9 0s * 33 4 4 58713.000000 58593.5420 0.20% 2.0 0s Cutting planes: Gomory: 14 Cover: 3 Flow cover: 57 Flow path: 37 Explored 42 nodes (488 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.871300000000e+04, best bound 5.871297036220e+04, gap 0.0001%