Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:13:47 2012 Optimize a model with 14212 rows, 4692 columns and 47056 nonzeros Presolve time: 0.11s Presolved: 14212 rows, 4692 columns, 47197 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 7205 iterations, 1.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 43.00000 2.00000 95.3% - 5s H 0 0 8.0000000 2.00000 75.0% - 5s H 0 0 5.0000000 2.00000 60.0% - 5s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 13s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 27s H 0 0 4.0000000 2.00000 50.0% - 28s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 34s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 40s 0 2 2.00000 0 136 4.00000 2.00000 50.0% - 60s 1 3 2.50000 1 317 4.00000 2.00000 50.0% 37535 70s 2 4 2.50000 1 135 4.00000 2.50000 37.5% 28935 79s 3 5 2.50000 2 187 4.00000 2.50000 37.5% 20046 80s 27 7 infeasible 2 4.00000 2.50000 37.5% 3131 86s 31 7 2.66667 4 276 4.00000 2.50000 37.5% 3110 90s 65 9 3.00000 4 132 4.00000 2.50000 37.5% 1724 95s Cutting planes: Clique: 119 Explored 123 nodes (204334 simplex iterations) in 96.79 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%