Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:22:22 2012 Optimize a model with 227 rows, 182 columns and 747 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 227 rows, 179 columns, 744 nonzeros Variable types: 0 continuous, 179 integer (178 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 93 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 65 50.00000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.47692 0 66 41.00000 0.47692 98.8% - 0s H 0 0 40.0000000 0.47692 98.8% - 0s 0 0 1.15663 0 68 40.00000 1.15663 97.1% - 0s H 0 0 38.0000000 1.15663 97.0% - 0s 0 0 1.54774 0 68 38.00000 1.54774 95.9% - 0s H 0 0 32.0000000 1.54774 95.2% - 0s H 0 0 27.0000000 1.54774 94.3% - 0s H 0 0 25.0000000 1.54774 93.8% - 0s H 0 0 20.0000000 1.54774 92.3% - 0s 0 2 1.56689 0 68 20.00000 1.56689 92.2% - 0s * 21 18 13 19.0000000 3.72032 80.4% 29.8 0s * 368 104 10 18.0000000 10.06250 44.1% 16.5 0s * 685 94 13 17.0000000 11.69231 31.2% 14.6 0s * 731 73 12 16.0000000 11.89286 25.7% 14.7 0s Cutting planes: Gomory: 3 Explored 875 nodes (12806 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%