Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:16 2012 Optimize a model with 1794 rows, 86 columns and 3588 nonzeros Presolve removed 1241 rows and 0 columns Presolve time: 0.05s Presolved: 553 rows, 86 columns, 3525 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.331777e+01, 379 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.31777 0 79 7.00000 13.31777 90.3% - 0s H 0 0 8.0000000 13.31777 66.5% - 0s 0 0 12.87812 0 85 8.00000 12.87812 61.0% - 0s 0 0 12.85037 0 86 8.00000 12.85037 60.6% - 0s 0 0 12.83361 0 84 8.00000 12.83361 60.4% - 0s 0 0 12.82236 0 86 8.00000 12.82236 60.3% - 0s 0 0 12.79736 0 86 8.00000 12.79736 60.0% - 0s 0 0 12.76740 0 84 8.00000 12.76740 59.6% - 0s 0 0 12.76280 0 85 8.00000 12.76280 59.5% - 0s 0 0 12.75770 0 85 8.00000 12.75770 59.5% - 0s 0 0 12.74989 0 86 8.00000 12.74989 59.4% - 0s H 0 0 9.0000000 12.74989 41.7% - 0s 0 0 12.74501 0 86 9.00000 12.74501 41.6% - 0s 0 0 12.72047 0 86 9.00000 12.72047 41.3% - 0s 0 0 12.71231 0 86 9.00000 12.71231 41.2% - 0s 0 0 12.71108 0 86 9.00000 12.71108 41.2% - 0s 0 0 12.71097 0 86 9.00000 12.71097 41.2% - 1s 0 2 12.70694 0 86 9.00000 12.70694 41.2% - 1s Cutting planes: Clique: 61 Zero half: 4 Explored 71 nodes (5021 simplex iterations) in 1.26 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%