Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:51:36 2012 Optimize a model with 307 rows, 544 columns and 1584 nonzeros Presolve removed 16 rows and 16 columns Presolve time: 0.01s Presolved: 291 rows, 528 columns, 1552 nonzeros Variable types: 256 continuous, 272 integer (272 binary) Found heuristic solution: objective 385.0000000 Found heuristic solution: objective 171.0000000 Found heuristic solution: objective 169.0000000 Root relaxation: objective 1.222500e+01, 321 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.22500 0 19 169.00000 12.22500 92.8% - 0s H 0 0 115.0000000 12.22500 89.4% - 0s 0 0 16.32448 0 32 115.00000 16.32448 85.8% - 0s 0 0 16.32448 0 34 115.00000 16.32448 85.8% - 0s 0 0 30.40000 0 16 115.00000 30.40000 73.6% - 0s H 0 0 110.0000000 30.40000 72.4% - 0s 0 0 30.80000 0 28 110.00000 30.80000 72.0% - 0s 0 0 30.80000 0 35 110.00000 30.80000 72.0% - 0s 0 0 30.80000 0 21 110.00000 30.80000 72.0% - 0s H 0 0 94.0000000 30.80000 67.2% - 0s H 0 0 49.0000000 30.80000 37.1% - 0s 0 0 30.80000 0 18 49.00000 30.80000 37.1% - 0s 0 0 30.80000 0 20 49.00000 30.80000 37.1% - 0s 0 0 30.80000 0 28 49.00000 30.80000 37.1% - 0s 0 0 30.80000 0 14 49.00000 30.80000 37.1% - 0s 0 2 30.80000 0 14 49.00000 30.80000 37.1% - 0s * 39 28 30 46.0000000 33.10000 28.0% 12.5 0s * 43 16 7 39.0000000 35.00000 10.3% 12.7 0s Cutting planes: Gomory: 14 Implied bound: 59 MIR: 3 Flow cover: 30 Flow path: 1 Explored 611 nodes (6305 simplex iterations) in 0.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%