Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:18:52 2012 Optimize a model with 4617 rows, 756 columns and 14499 nonzeros Presolve time: 0.05s Presolved: 4617 rows, 756 columns, 21349 nonzeros Variable types: 0 continuous, 756 integer (756 binary) Found heuristic solution: objective 11.0000000 Root relaxation: objective 2.000000e+00, 118 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 54 11.00000 2.00000 81.8% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 54 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 54 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 54 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 54 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 54 8.00000 2.00000 75.0% - 1s H 0 0 7.0000000 2.00000 71.4% - 1s 0 2 2.00000 0 54 7.00000 2.00000 71.4% - 1s 104 55 cutoff 22 7.00000 3.16667 54.8% 271 5s 281 114 4.50000 6 45 7.00000 4.33333 38.1% 254 10s 464 182 6.00000 19 48 7.00000 4.50000 35.7% 210 15s 615 204 5.00000 10 130 7.00000 5.00000 28.6% 193 20s 623 209 5.50000 14 108 7.00000 5.13559 26.6% 202 25s 850 201 5.50000 18 101 7.00000 5.25000 25.0% 193 30s 1109 168 6.00000 17 61 7.00000 5.50000 21.4% 171 35s 1580 213 cutoff 20 7.00000 5.74667 17.9% 165 40s 2095 160 cutoff 25 7.00000 6.00000 14.3% 155 45s 3075 98 cutoff 27 7.00000 6.00000 14.3% 136 50s 3778 38 6.00000 15 83 7.00000 6.00000 14.3% 131 55s 4227 25 6.00000 19 96 7.00000 6.00000 14.3% 133 60s 4559 12 cutoff 19 7.00000 6.00000 14.3% 136 65s Cutting planes: Clique: 1 Explored 4712 nodes (668494 simplex iterations) in 68.14 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%