Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:04:27 2012 Optimize a model with 401 rows, 401 columns and 1401 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 401 rows, 374 columns, 1374 nonzeros Variable types: 0 continuous, 374 integer (373 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 0.000000e+00, 242 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 0 160 73.00000 0.00000 100% - 0s H 0 0 50.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.33651 0 161 41.00000 0.33651 99.2% - 0s H 0 0 25.0000000 0.33651 98.7% - 0s H 0 0 22.0000000 0.33651 98.5% - 0s 0 0 1.00000 0 162 22.00000 1.00000 95.5% - 0s H 0 0 17.0000000 1.00000 94.1% - 0s 0 0 1.00000 0 162 17.00000 1.00000 94.1% - 0s 0 0 1.00000 0 162 17.00000 1.00000 94.1% - 0s 0 0 1.00000 0 160 17.00000 1.00000 94.1% - 0s 0 2 1.00000 0 160 17.00000 1.00000 94.1% - 0s H 27 27 12.0000000 1.53846 87.2% 38.2 0s * 42 30 25 10.0000000 1.53846 84.6% 30.6 0s * 72 32 22 9.0000000 1.57500 82.5% 24.5 0s * 139 23 11 8.0000000 4.50000 43.8% 28.0 0s Cutting planes: Gomory: 2 Explored 187 nodes (6306 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%