Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:04 2012 Optimize a model with 2012 rows, 91 columns and 4024 nonzeros Presolve removed 1414 rows and 0 columns Presolve time: 0.05s Presolved: 598 rows, 91 columns, 3851 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.359416e+01, 298 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.59416 0 89 6.00000 13.59416 127% - 0s H 0 0 7.0000000 13.59416 94.2% - 0s H 0 0 8.0000000 13.59416 69.9% - 0s 0 0 13.38141 0 90 8.00000 13.38141 67.3% - 0s 0 0 13.23413 0 91 8.00000 13.23413 65.4% - 0s 0 0 13.19219 0 91 8.00000 13.19219 64.9% - 0s 0 0 13.18435 0 91 8.00000 13.18435 64.8% - 0s 0 0 13.17782 0 91 8.00000 13.17782 64.7% - 0s 0 0 13.17274 0 91 8.00000 13.17274 64.7% - 0s 0 0 13.16661 0 91 8.00000 13.16661 64.6% - 0s 0 0 13.16650 0 91 8.00000 13.16650 64.6% - 0s 0 0 13.16548 0 91 8.00000 13.16548 64.6% - 0s 0 2 13.16310 0 91 8.00000 13.16310 64.5% - 0s * 82 25 11 9.0000000 12.56049 39.6% 43.9 0s Cutting planes: Clique: 49 Zero half: 4 Explored 148 nodes (7417 simplex iterations) in 1.12 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%