Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:34 2012 Optimize a model with 2184 rows, 93 columns and 4368 nonzeros Presolve removed 1546 rows and 0 columns Presolve time: 0.06s Presolved: 638 rows, 93 columns, 4376 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.307957e+01, 359 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.07957 0 86 6.00000 13.07957 118% - 0s H 0 0 7.0000000 13.07957 86.9% - 0s 0 0 12.77160 0 92 7.00000 12.77160 82.5% - 0s H 0 0 8.0000000 12.77160 59.6% - 0s 0 0 12.70696 0 92 8.00000 12.70696 58.8% - 0s 0 0 12.69798 0 90 8.00000 12.69798 58.7% - 0s 0 0 12.69790 0 90 8.00000 12.69790 58.7% - 0s 0 2 12.69042 0 90 8.00000 12.69042 58.6% - 0s * 93 29 7 9.0000000 12.00983 33.4% 51.6 0s Cutting planes: Clique: 50 Zero half: 2 Explored 129 nodes (7188 simplex iterations) in 1.01 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%