Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:34 2012 Optimize a model with 560 rows, 104 columns and 1120 nonzeros Presolve removed 229 rows and 1 columns Presolve time: 0.00s Presolved: 331 rows, 103 columns, 850 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.643443e+01, 201 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.43443 0 101 26.00000 36.43443 40.1% - 0s H 0 0 29.0000000 36.43443 25.6% - 0s 0 0 36.14361 0 102 29.00000 36.14361 24.6% - 0s H 0 0 30.0000000 36.14361 20.5% - 0s 0 0 36.00203 0 101 30.00000 36.00203 20.0% - 0s 0 0 35.77897 0 102 30.00000 35.77897 19.3% - 0s 0 0 35.59132 0 101 30.00000 35.59132 18.6% - 0s 0 0 35.35455 0 102 30.00000 35.35455 17.8% - 0s 0 0 35.29588 0 101 30.00000 35.29588 17.7% - 0s 0 0 35.26330 0 102 30.00000 35.26330 17.5% - 0s 0 0 35.23642 0 102 30.00000 35.23642 17.5% - 0s 0 0 35.20891 0 103 30.00000 35.20891 17.4% - 0s 0 0 35.18311 0 101 30.00000 35.18311 17.3% - 0s 0 0 35.16511 0 102 30.00000 35.16511 17.2% - 0s 0 0 35.12692 0 102 30.00000 35.12692 17.1% - 0s H 0 0 31.0000000 35.12692 13.3% - 0s 0 0 35.05196 0 102 31.00000 35.05196 13.1% - 0s 0 0 35.03042 0 101 31.00000 35.03042 13.0% - 0s 0 0 35.01018 0 102 31.00000 35.01018 12.9% - 0s 0 0 34.96699 0 103 31.00000 34.96699 12.8% - 0s 0 0 34.91718 0 102 31.00000 34.91718 12.6% - 0s 0 0 34.85197 0 103 31.00000 34.85197 12.4% - 0s 0 0 34.79067 0 103 31.00000 34.79067 12.2% - 0s 0 0 34.76808 0 102 31.00000 34.76808 12.2% - 0s 0 0 34.75047 0 103 31.00000 34.75047 12.1% - 0s 0 0 34.75047 0 102 31.00000 34.75047 12.1% - 0s 0 2 34.74676 0 102 31.00000 34.74676 12.1% - 0s Cutting planes: Clique: 2 Zero half: 48 Explored 95 nodes (4187 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%