Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:23:50 2012 Optimize a model with 15776 rows, 4692 columns and 51748 nonzeros Presolve time: 0.13s Presolved: 15776 rows, 4692 columns, 51948 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 2.000000e+00, 5022 iterations, 0.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 39.00000 2.00000 94.9% - 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 0 136 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 19s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 27s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 40s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 46s 0 2 2.00000 0 136 5.00000 2.00000 60.0% - 69s 1 3 2.52381 1 249 5.00000 2.00000 60.0% 53034 79s 2 4 2.50000 1 135 5.00000 2.50000 50.0% 38232 88s 3 5 2.66667 2 184 5.00000 2.50000 50.0% 31007 92s H 22 11 4.0000000 2.50000 37.5% 4833 94s 26 9 2.50000 2 135 4.00000 2.50000 37.5% 4129 95s 55 8 2.66667 2 807 4.00000 2.66667 33.3% 2658 108s 57 10 3.00000 3 470 4.00000 2.66667 33.3% 2815 113s 60 11 3.00000 5 124 4.00000 2.66667 33.3% 2735 115s 76 3 3.00000 4 369 4.00000 3.00000 25.0% 2534 120s Cutting planes: Clique: 146 Explored 82 nodes (309475 simplex iterations) in 122.27 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%