Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:53:12 2012 Optimize a model with 691 rows, 118 columns and 1382 nonzeros Presolve removed 243 rows and 0 columns Presolve time: 0.00s Presolved: 448 rows, 118 columns, 1102 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 4.110000e+01, 264 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.10000 0 111 25.00000 41.10000 64.4% - 0s H 0 0 27.0000000 41.10000 52.2% - 0s 0 0 40.56722 0 115 27.00000 40.56722 50.2% - 0s H 0 0 30.0000000 40.56722 35.2% - 0s 0 0 39.50607 0 116 30.00000 39.50607 31.7% - 0s 0 0 39.29253 0 114 30.00000 39.29253 31.0% - 0s 0 0 39.06658 0 115 30.00000 39.06658 30.2% - 0s 0 0 38.93287 0 115 30.00000 38.93287 29.8% - 0s 0 0 38.82996 0 112 30.00000 38.82996 29.4% - 0s 0 0 38.71728 0 115 30.00000 38.71728 29.1% - 0s 0 0 38.63484 0 116 30.00000 38.63484 28.8% - 0s 0 0 38.53848 0 117 30.00000 38.53848 28.5% - 0s 0 0 38.47572 0 117 30.00000 38.47572 28.3% - 0s 0 0 38.45137 0 117 30.00000 38.45137 28.2% - 0s 0 0 38.43152 0 118 30.00000 38.43152 28.1% - 0s 0 0 38.43152 0 117 30.00000 38.43152 28.1% - 0s H 0 0 32.0000000 38.43152 20.1% - 0s 0 2 38.43117 0 117 32.00000 38.43117 20.1% - 0s 616 161 33.70833 11 117 32.00000 35.78049 11.8% 27.6 5s Cutting planes: Gomory: 1 Clique: 6 Zero half: 87 Explored 2112 nodes (58494 simplex iterations) in 9.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%