Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:32:27 2012 Optimize a model with 5208 rows, 812 columns and 16324 nonzeros Presolve time: 0.05s Presolved: 5208 rows, 812 columns, 24467 nonzeros Variable types: 0 continuous, 812 integer (812 binary) Found heuristic solution: objective 16.0000000 Root relaxation: objective 2.000000e+00, 1879 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 56 16.00000 2.00000 87.5% - 0s H 0 0 10.0000000 2.00000 80.0% - 0s 0 0 2.00000 0 56 10.00000 2.00000 80.0% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 56 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 56 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 56 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 56 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 56 8.00000 2.00000 75.0% - 0s H 0 0 7.0000000 2.00000 71.4% - 0s 0 2 2.00000 0 56 7.00000 2.00000 71.4% - 0s 189 69 6.00000 4 81 7.00000 4.09524 41.5% 223 5s 580 153 6.00000 10 46 7.00000 5.00000 28.6% 150 10s 613 173 6.00000 24 81 7.00000 6.00000 14.3% 179 15s 658 171 6.00000 32 59 7.00000 6.00000 14.3% 183 20s 940 77 6.00000 33 68 7.00000 6.00000 14.3% 177 25s 1212 21 6.00000 28 101 7.00000 6.00000 14.3% 184 30s 1418 17 infeasible 36 7.00000 6.00000 14.3% 191 35s Explored 1676 nodes (324470 simplex iterations) in 39.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%