Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:35 2012 Optimize a model with 678 rows, 117 columns and 1356 nonzeros Presolve removed 249 rows and 0 columns Presolve time: 0.00s Presolved: 429 rows, 117 columns, 1075 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.088732e+01, 337 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.88732 0 114 27.00000 40.88732 51.4% - 0s H 0 0 29.0000000 40.88732 41.0% - 0s 0 0 40.00000 0 111 29.00000 40.00000 37.9% - 0s 0 0 40.00000 0 115 29.00000 40.00000 37.9% - 0s 0 0 39.67106 0 114 29.00000 39.67106 36.8% - 0s H 0 0 30.0000000 39.67106 32.2% - 0s 0 0 39.56441 0 116 30.00000 39.56441 31.9% - 0s 0 0 39.47735 0 116 30.00000 39.47735 31.6% - 0s 0 0 39.42510 0 116 30.00000 39.42510 31.4% - 0s 0 0 39.29232 0 115 30.00000 39.29232 31.0% - 0s 0 0 39.20453 0 116 30.00000 39.20453 30.7% - 0s 0 0 39.14454 0 117 30.00000 39.14454 30.5% - 0s 0 0 39.05697 0 116 30.00000 39.05697 30.2% - 0s 0 0 38.99693 0 116 30.00000 38.99693 30.0% - 0s 0 0 38.90008 0 116 30.00000 38.90008 29.7% - 0s 0 0 38.80750 0 114 30.00000 38.80750 29.4% - 0s 0 0 38.75556 0 115 30.00000 38.75556 29.2% - 0s 0 0 38.70267 0 116 30.00000 38.70267 29.0% - 0s 0 0 38.69911 0 116 30.00000 38.69911 29.0% - 0s 0 0 38.69911 0 116 30.00000 38.69911 29.0% - 0s 0 2 38.69844 0 116 30.00000 38.69844 29.0% - 0s * 37 27 13 31.0000000 38.60516 24.5% 39.8 0s H 242 75 32.0000000 37.31159 16.6% 29.2 0s 613 172 33.00000 12 114 32.00000 36.16309 13.0% 27.2 5s * 693 188 22 33.0000000 36.16309 9.59% 32.8 8s Cutting planes: Gomory: 1 Clique: 1 Zero half: 47 Explored 1261 nodes (38273 simplex iterations) in 8.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%