Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 418 rows, 123 columns and 836 nonzeros Presolve removed 100 rows and 4 columns Presolve time: 0.00s Presolved: 318 rows, 119 columns, 689 nonzeros Variable types: 0 continuous, 119 integer (119 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.160000e+01, 207 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.60000 0 114 41.00000 51.60000 25.9% - 0s H 0 0 44.0000000 51.60000 17.3% - 0s 0 0 50.12069 0 118 44.00000 50.12069 13.9% - 0s 0 0 50.04762 0 119 44.00000 50.04762 13.7% - 0s H 0 0 45.0000000 50.04762 11.2% - 0s 0 0 49.77694 0 117 45.00000 49.77694 10.6% - 0s 0 0 49.41457 0 117 45.00000 49.41457 9.81% - 0s 0 0 49.24955 0 118 45.00000 49.24955 9.44% - 0s 0 0 49.17756 0 116 45.00000 49.17756 9.28% - 0s 0 0 49.02635 0 116 45.00000 49.02635 8.95% - 0s 0 0 48.85334 0 118 45.00000 48.85334 8.56% - 0s 0 0 48.66982 0 118 45.00000 48.66982 8.16% - 0s H 0 0 46.0000000 48.66982 5.80% - 0s 0 0 48.62574 0 118 46.00000 48.62574 5.71% - 0s 0 0 48.62505 0 119 46.00000 48.62505 5.71% - 0s 0 0 48.62505 0 118 46.00000 48.62505 5.71% - 0s 0 2 48.62372 0 118 46.00000 48.62372 5.70% - 0s Cutting planes: Clique: 1 Zero half: 66 Explored 35 nodes (1953 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%