Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:49:29 2012 Optimize a model with 20424 rows, 5550 columns and 66526 nonzeros Presolve time: 0.15s Presolved: 20424 rows, 5550 columns, 66577 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 2.000000e+00, 11290 iterations, 2.44 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 47.00000 2.00000 95.7% - 3s H 0 0 17.0000000 2.00000 88.2% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 19s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 21s 0 2 2.00000 0 148 5.00000 2.00000 60.0% - 37s 1 3 3.00000 1 1003 5.00000 2.00000 60.0% 29569 49s 2 4 3.00000 1 707 5.00000 3.00000 40.0% 25282 59s 3 5 3.00000 2 366 5.00000 3.00000 40.0% 17593 60s 9 7 3.33333 4 317 5.00000 3.00000 40.0% 7729 65s 47 33 3.00000 2 641 5.00000 3.00000 40.0% 1708 72s 50 34 4.00000 4 318 5.00000 3.00000 40.0% 1845 75s 85 55 4.00000 12 122 5.00000 4.00000 20.0% 1243 80s * 135 2 24 4.0000000 4.00000 0.0% 831 80s Cutting planes: Clique: 39 Explored 136 nodes (144863 simplex iterations) in 80.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%