Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:02:54 2012 Optimize a model with 3956 rows, 126 columns and 7912 nonzeros Presolve removed 2833 rows and 0 columns Presolve time: 0.13s Presolved: 1123 rows, 126 columns, 7740 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.672101e+01, 560 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.72101 0 124 7.00000 16.72101 139% - 0s H 0 0 8.0000000 16.72101 109% - 0s 0 0 16.29864 0 126 8.00000 16.29864 104% - 0s H 0 0 9.0000000 16.29864 81.1% - 0s 0 0 16.27447 0 126 9.00000 16.27447 80.8% - 0s 0 0 16.25201 0 125 9.00000 16.25201 80.6% - 0s 0 0 16.24327 0 126 9.00000 16.24327 80.5% - 0s 0 0 16.23420 0 125 9.00000 16.23420 80.4% - 1s 0 0 16.23243 0 125 9.00000 16.23243 80.4% - 1s 0 0 16.23056 0 125 9.00000 16.23056 80.3% - 1s 0 0 16.23045 0 125 9.00000 16.23045 80.3% - 1s 0 2 16.23007 0 125 9.00000 16.23007 80.3% - 2s 653 164 10.46411 33 45 9.00000 12.20227 35.6% 58.9 5s Cutting planes: Clique: 118 Explored 943 nodes (51762 simplex iterations) in 6.66 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%