Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:36 2012 Optimize a model with 2151 rows, 93 columns and 4302 nonzeros Presolve removed 1517 rows and 0 columns Presolve time: 0.06s Presolved: 634 rows, 93 columns, 4117 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 1.376269e+01, 428 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.76269 0 89 5.00000 13.76269 175% - 0s H 0 0 6.0000000 13.76269 129% - 0s H 0 0 7.0000000 13.76269 96.6% - 0s H 0 0 8.0000000 13.76269 72.0% - 0s 0 0 13.24727 0 91 8.00000 13.24727 65.6% - 0s 0 0 13.13129 0 91 8.00000 13.13129 64.1% - 0s 0 0 13.10972 0 92 8.00000 13.10972 63.9% - 0s 0 0 13.05531 0 91 8.00000 13.05531 63.2% - 0s 0 0 13.03977 0 91 8.00000 13.03977 63.0% - 0s 0 0 13.03195 0 91 8.00000 13.03195 62.9% - 0s 0 0 13.02814 0 91 8.00000 13.02814 62.9% - 0s 0 0 13.02635 0 91 8.00000 13.02635 62.8% - 0s 0 0 13.02448 0 91 8.00000 13.02448 62.8% - 0s 0 0 13.02429 0 91 8.00000 13.02429 62.8% - 1s 0 2 13.01703 0 91 8.00000 13.01703 62.7% - 1s * 215 27 5 9.0000000 10.90716 21.2% 46.6 1s Cutting planes: Clique: 69 Explored 243 nodes (11359 simplex iterations) in 1.63 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%