Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:21 2012 Optimize a model with 557 rows, 101 columns and 1114 nonzeros Presolve removed 224 rows and 1 columns Presolve time: 0.00s Presolved: 333 rows, 100 columns, 859 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.537736e+01, 216 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.37736 0 98 28.00000 35.37736 26.3% - 0s 0 0 34.87251 0 99 28.00000 34.87251 24.5% - 0s H 0 0 30.0000000 34.87251 16.2% - 0s 0 0 34.72082 0 98 30.00000 34.72082 15.7% - 0s 0 0 34.51897 0 100 30.00000 34.51897 15.1% - 0s 0 0 34.38280 0 100 30.00000 34.38280 14.6% - 0s 0 0 34.30570 0 99 30.00000 34.30570 14.4% - 0s 0 0 34.22261 0 100 30.00000 34.22261 14.1% - 0s 0 0 34.13579 0 99 30.00000 34.13579 13.8% - 0s 0 0 34.08207 0 99 30.00000 34.08207 13.6% - 0s 0 0 34.07454 0 99 30.00000 34.07454 13.6% - 0s 0 0 34.07454 0 99 30.00000 34.07454 13.6% - 0s 0 2 34.07374 0 99 30.00000 34.07374 13.6% - 0s Cutting planes: Clique: 2 Zero half: 41 Explored 149 nodes (4777 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%