Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:22 2012 Optimize a model with 311 rows, 332 columns and 1107 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 311 rows, 305 columns, 1080 nonzeros Variable types: 0 continuous, 305 integer (304 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 203 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 0 128 51.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.15909 0 130 29.00000 0.15909 99.5% - 0s H 0 0 19.0000000 0.15909 99.2% - 0s 0 0 0.69384 0 132 19.00000 0.69384 96.3% - 0s H 0 0 9.0000000 0.69384 92.3% - 0s 0 0 0.69522 0 138 9.00000 0.69522 92.3% - 0s 0 0 0.69522 0 137 9.00000 0.69522 92.3% - 0s H 0 0 6.0000000 0.69522 88.4% - 0s 0 2 0.69522 0 135 6.00000 0.69522 88.4% - 0s * 22 18 14 5.0000000 1.03515 79.3% 27.3 0s * 65 8 9 4.0000000 1.28868 67.8% 22.0 0s Cutting planes: Gomory: 2 Mod-K: 2 Explored 79 nodes (2615 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%