Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:01:07 2012 Optimize a model with 3824 rows, 124 columns and 7648 nonzeros Presolve removed 2744 rows and 0 columns Presolve time: 0.13s Presolved: 1080 rows, 124 columns, 7483 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.667488e+01, 483 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.67488 0 123 7.00000 16.67488 138% - 0s 0 0 16.43079 0 123 7.00000 16.43079 135% - 0s H 0 0 8.0000000 16.43079 105% - 0s 0 0 16.33491 0 123 8.00000 16.33491 104% - 0s 0 0 16.24110 0 124 8.00000 16.24110 103% - 0s 0 0 16.18279 0 122 8.00000 16.18279 102% - 0s H 0 0 9.0000000 16.18279 79.8% - 0s 0 0 16.16025 0 123 9.00000 16.16025 79.6% - 1s 0 0 16.14107 0 123 9.00000 16.14107 79.3% - 1s 0 0 16.14075 0 123 9.00000 16.14075 79.3% - 1s 0 2 16.13976 0 123 9.00000 16.13976 79.3% - 1s * 453 122 9 10.0000000 13.37236 33.7% 62.5 3s Cutting planes: Clique: 81 Explored 640 nodes (37850 simplex iterations) in 4.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%