Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:23:00 2012 Optimize a model with 275 rows, 207 columns and 892 nonzeros Presolve time: 0.00s Presolved: 275 rows, 207 columns, 892 nonzeros Variable types: 0 continuous, 207 integer (207 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 0.000000e+00, 120 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 70 55.00000 0.00000 100% - 0s H 0 0 50.0000000 0.00000 100% - 0s 0 0 0.71667 0 73 50.00000 0.71667 98.6% - 0s H 0 0 47.0000000 0.71667 98.5% - 0s 0 0 0.75000 0 72 47.00000 0.75000 98.4% - 0s 0 0 0.90000 0 75 47.00000 0.90000 98.1% - 0s H 0 0 46.0000000 0.90000 98.0% - 0s 0 0 0.91111 0 72 46.00000 0.91111 98.0% - 0s 0 0 0.94000 0 76 46.00000 0.94000 98.0% - 0s 0 0 0.96400 0 79 46.00000 0.96400 97.9% - 0s H 0 0 38.0000000 0.96400 97.5% - 0s 0 0 0.96667 0 72 38.00000 0.96667 97.5% - 0s 0 0 0.99333 0 74 38.00000 0.99333 97.4% - 0s 0 0 1.00556 0 75 38.00000 1.00556 97.4% - 0s 0 0 1.00556 0 75 38.00000 1.00556 97.4% - 0s H 0 0 36.0000000 1.00556 97.2% - 0s 0 2 1.01265 0 75 36.00000 1.01265 97.2% - 0s * 34 32 19 28.0000000 3.75455 86.6% 26.6 0s * 66 55 22 27.0000000 3.80000 85.9% 22.2 0s * 130 85 19 25.0000000 6.10000 75.6% 21.9 0s * 222 113 12 24.0000000 9.66667 59.7% 21.7 0s Cutting planes: Gomory: 1 Zero half: 7 Explored 1744 nodes (28939 simplex iterations) in 1.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%