Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:17:03 2012 Optimize a model with 14892 rows, 4692 columns and 49096 nonzeros Presolve time: 0.12s Presolved: 14892 rows, 4692 columns, 49248 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 2.000000e+00, 4026 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 45.00000 2.00000 95.6% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 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% - 12s 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% - 34s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 41s H 0 0 4.0000000 2.00000 50.0% - 46s 0 2 2.00000 0 136 4.00000 2.00000 50.0% - 60s 1 3 2.50000 1 920 4.00000 2.00000 50.0% 49564 76s 2 4 2.50000 1 843 4.00000 2.50000 37.5% 35549 86s 27 13 3.00000 8 124 4.00000 2.50000 37.5% 3163 90s 50 15 3.00000 5 132 4.00000 2.50000 37.5% 2124 96s 73 16 3.00000 3 124 4.00000 2.50000 37.5% 1595 100s 192 13 3.00000 7 128 4.00000 3.00000 25.0% 726 105s Cutting planes: Clique: 99 Explored 266 nodes (244793 simplex iterations) in 106.95 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%