Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:19:44 2012 Optimize a model with 223 rows, 174 columns and 729 nonzeros Presolve time: 0.00s Presolved: 223 rows, 174 columns, 729 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 0.000000e+00, 87 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 63 42.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.84211 0 65 31.00000 0.84211 97.3% - 0s 0 0 0.95948 0 67 31.00000 0.95948 96.9% - 0s 0 0 0.98393 0 65 31.00000 0.98393 96.8% - 0s 0 0 0.99280 0 66 31.00000 0.99280 96.8% - 0s 0 0 0.99280 0 66 31.00000 0.99280 96.8% - 0s 0 2 1.14035 0 66 31.00000 1.14035 96.3% - 0s * 25 25 16 20.0000000 3.35486 83.2% 21.8 0s * 30 25 18 19.0000000 3.35486 82.3% 19.1 0s * 77 41 16 18.0000000 6.31222 64.9% 21.8 0s * 836 22 10 17.0000000 14.71660 13.4% 16.5 0s Cutting planes: Gomory: 1 Zero half: 6 Explored 867 nodes (14389 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%