Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:07:43 2012 Optimize a model with 7501 rows, 992 columns and 23341 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 7530 rows, 990 columns, 27620 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.468354e+00, 6462 iterations, 0.44 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46835 0 841 31.00000 3.46835 88.8% - 1s 0 0 6.00000 0 111 31.00000 6.00000 80.6% - 2s H 0 0 24.0000000 6.00000 75.0% - 2s H 0 0 10.0000000 6.00000 40.0% - 2s 0 0 6.00000 0 151 10.00000 6.00000 40.0% - 2s H 0 0 9.0000000 6.00000 33.3% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 114 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 128 8.00000 6.00000 25.0% - 4s 0 0 6.00000 0 126 8.00000 6.00000 25.0% - 5s 0 0 6.00000 0 112 8.00000 6.00000 25.0% - 7s 0 0 6.00000 0 137 8.00000 6.00000 25.0% - 9s 0 0 6.00000 0 131 8.00000 6.00000 25.0% - 10s 0 0 6.00000 0 100 8.00000 6.00000 25.0% - 11s 0 0 6.00000 0 137 8.00000 6.00000 25.0% - 11s 0 0 6.00000 0 86 8.00000 6.00000 25.0% - 13s 0 0 6.00000 0 89 8.00000 6.00000 25.0% - 14s 0 0 6.00000 0 89 8.00000 6.00000 25.0% - 15s H 0 0 7.0000000 6.00000 14.3% - 16s 0 0 6.00000 0 82 7.00000 6.00000 14.3% - 16s 0 0 6.00000 0 142 7.00000 6.00000 14.3% - 16s 0 0 6.00000 0 131 7.00000 6.00000 14.3% - 16s 0 0 6.00000 0 93 7.00000 6.00000 14.3% - 17s 0 0 6.00000 0 121 7.00000 6.00000 14.3% - 17s 0 0 6.00000 0 93 7.00000 6.00000 14.3% - 17s 0 0 6.00000 0 128 7.00000 6.00000 14.3% - 17s 0 0 6.00000 0 128 7.00000 6.00000 14.3% - 17s 0 2 6.00000 0 128 7.00000 6.00000 14.3% - 17s Cutting planes: Clique: 27 Zero half: 34 Explored 3 nodes (62771 simplex iterations) in 17.43 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%