Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:04:14 2012 Optimize a model with 4068 rows, 127 columns and 8136 nonzeros Presolve removed 2870 rows and 0 columns Presolve time: 0.16s Presolved: 1198 rows, 127 columns, 8787 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.645102e+01, 607 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.45102 0 119 7.00000 16.45102 135% - 0s H 0 0 8.0000000 16.45102 106% - 0s 0 0 15.96184 0 125 8.00000 15.96184 100% - 0s 0 0 15.89828 0 124 8.00000 15.89828 98.7% - 0s 0 0 15.86288 0 126 8.00000 15.86288 98.3% - 0s 0 0 15.85286 0 125 8.00000 15.85286 98.2% - 1s H 0 0 9.0000000 15.85286 76.1% - 1s 0 0 15.80661 0 126 9.00000 15.80661 75.6% - 1s 0 0 15.79971 0 126 9.00000 15.79971 75.6% - 1s 0 0 15.78616 0 126 9.00000 15.78616 75.4% - 1s 0 0 15.77581 0 125 9.00000 15.77581 75.3% - 1s 0 0 15.77066 0 126 9.00000 15.77066 75.2% - 2s 0 0 15.76675 0 126 9.00000 15.76675 75.2% - 2s 0 0 15.76491 0 127 9.00000 15.76491 75.2% - 2s 0 0 15.76479 0 126 9.00000 15.76479 75.2% - 2s 0 0 15.76476 0 126 9.00000 15.76476 75.2% - 2s 0 0 15.76475 0 127 9.00000 15.76475 75.2% - 2s 0 2 15.76261 0 127 9.00000 15.76261 75.1% - 3s 287 142 11.42715 15 55 9.00000 13.69517 52.2% 72.6 5s Cutting planes: Clique: 134 Explored 734 nodes (45163 simplex iterations) in 7.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%