Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:32 2012 Optimize a model with 1570 rows, 79 columns and 3140 nonzeros Presolve removed 1107 rows and 0 columns Presolve time: 0.04s Presolved: 463 rows, 79 columns, 2960 nonzeros Variable types: 0 continuous, 79 integer (79 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.237256e+01, 258 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.37256 0 76 7.00000 12.37256 76.8% - 0s H 0 0 8.0000000 12.37256 54.7% - 0s 0 0 11.92488 0 75 8.00000 11.92488 49.1% - 0s 0 0 11.86369 0 78 8.00000 11.86369 48.3% - 0s H 0 0 9.0000000 11.86369 31.8% - 0s 0 0 11.83070 0 76 9.00000 11.83070 31.5% - 0s 0 0 11.80416 0 78 9.00000 11.80416 31.2% - 0s 0 0 11.78153 0 78 9.00000 11.78153 30.9% - 0s 0 0 11.77694 0 78 9.00000 11.77694 30.9% - 0s 0 0 11.77483 0 78 9.00000 11.77483 30.8% - 0s 0 0 11.77199 0 78 9.00000 11.77199 30.8% - 0s 0 0 11.77120 0 78 9.00000 11.77120 30.8% - 0s 0 0 11.75681 0 77 9.00000 11.75681 30.6% - 0s 0 0 11.74323 0 78 9.00000 11.74323 30.5% - 0s 0 0 11.73809 0 78 9.00000 11.73809 30.4% - 0s 0 0 11.73765 0 78 9.00000 11.73765 30.4% - 0s 0 0 11.72247 0 78 9.00000 11.72247 30.2% - 0s 0 0 11.71775 0 78 9.00000 11.71775 30.2% - 0s 0 0 11.71670 0 78 9.00000 11.71670 30.2% - 0s 0 0 11.71274 0 78 9.00000 11.71274 30.1% - 0s 0 0 11.71062 0 78 9.00000 11.71062 30.1% - 0s 0 0 11.71037 0 78 9.00000 11.71037 30.1% - 0s 0 2 11.70912 0 78 9.00000 11.70912 30.1% - 0s Cutting planes: Clique: 51 Zero half: 1 Explored 31 nodes (2313 simplex iterations) in 1.00 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%