Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:23:03 2012 Optimize a model with 13952 rows, 4160 columns and 45760 nonzeros Presolve time: 0.12s Presolved: 13952 rows, 4160 columns, 45958 nonzeros Variable types: 0 continuous, 4160 integer (4160 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 2.000000e+00, 4807 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 38.00000 2.00000 94.7% - 2s H 0 0 14.0000000 2.00000 85.7% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 34s 0 2 2.00000 0 128 5.00000 2.00000 60.0% - 54s 1 3 2.50000 1 183 5.00000 2.00000 60.0% 22761 59s 2 4 2.50000 1 550 5.00000 2.50000 50.0% 19292 65s 10 12 3.16667 7 150 5.00000 2.50000 50.0% 5796 70s * 39 8 24 4.0000000 2.50000 37.5% 1650 72s 55 12 3.00000 2 120 4.00000 2.50000 37.5% 1410 76s 85 20 2.60000 2 215 4.00000 2.50004 37.5% 1085 80s 119 18 3.00000 7 122 4.00000 3.00000 25.0% 914 85s Cutting planes: Clique: 120 Explored 163 nodes (207005 simplex iterations) in 85.72 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%