Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:30:42 2012 Optimize a model with 555 rows, 540 columns and 1781 nonzeros Presolve removed 41 rows and 25 columns Presolve time: 0.01s Presolved: 514 rows, 515 columns, 1681 nonzeros Variable types: 344 continuous, 171 integer (171 binary) Root relaxation: objective 5.180102e+04, 258 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51801.0185 0 90 - 51801.0185 - - 0s H 0 0 78693.000000 51801.0185 34.2% - 0s 0 0 62450.0322 0 29 78693.0000 62450.0322 20.6% - 0s 0 0 62833.8170 0 16 78693.0000 62833.8170 20.2% - 0s 0 0 62876.1424 0 18 78693.0000 62876.1424 20.1% - 0s 0 2 62876.9995 0 18 78693.0000 62876.9995 20.1% - 0s H 59 56 64170.000000 62881.0729 2.01% 4.1 0s * 60 52 53 64164.000000 62881.0729 2.00% 4.1 0s H 121 81 63777.686316 62881.1938 1.41% 3.8 0s H 122 82 63771.686316 62881.1938 1.40% 3.8 0s * 124 61 53 63485.000000 62881.1938 0.95% 3.8 0s * 187 81 33 63315.000000 62891.0796 0.67% 3.8 0s * 314 88 44 63149.000000 62899.3058 0.40% 3.9 0s * 738 190 41 63141.000000 62996.7194 0.23% 4.3 0s H 739 179 63140.000000 62996.7194 0.23% 4.3 0s * 740 170 42 63135.000000 62996.7194 0.22% 4.3 0s Cutting planes: Gomory: 7 Cover: 1 Flow cover: 42 Flow path: 24 Explored 1126 nodes (5032 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.313499999999e+04, best bound 6.312972260635e+04, gap 0.0084%