Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:55 2012 Optimize a model with 2218 rows, 95 columns and 4436 nonzeros Presolve removed 1568 rows and 0 columns Presolve time: 0.06s Presolved: 650 rows, 95 columns, 4155 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.410883e+01, 381 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.10883 0 90 7.00000 14.10883 102% - 0s H 0 0 8.0000000 14.10883 76.4% - 0s 0 0 13.80134 0 91 8.00000 13.80134 72.5% - 0s 0 0 13.60462 0 92 8.00000 13.60462 70.1% - 0s 0 0 13.57091 0 94 8.00000 13.57091 69.6% - 0s 0 0 13.55216 0 94 8.00000 13.55216 69.4% - 0s 0 0 13.54617 0 95 8.00000 13.54617 69.3% - 0s 0 0 13.53941 0 95 8.00000 13.53941 69.2% - 0s 0 0 13.53788 0 95 8.00000 13.53788 69.2% - 0s 0 0 13.53627 0 95 8.00000 13.53627 69.2% - 0s H 0 0 9.0000000 13.53627 50.4% - 0s 0 2 13.53551 0 95 9.00000 13.53551 50.4% - 0s Cutting planes: Clique: 73 Zero half: 2 Explored 149 nodes (9061 simplex iterations) in 1.24 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%