Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:58 2012 Optimize a model with 562 rows, 107 columns and 1124 nonzeros Presolve removed 205 rows and 0 columns Presolve time: 0.00s Presolved: 357 rows, 107 columns, 887 nonzeros Variable types: 0 continuous, 107 integer (107 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.832353e+01, 240 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.32353 0 105 25.00000 38.32353 53.3% - 0s 0 0 37.93723 0 101 25.00000 37.93723 51.7% - 0s H 0 0 29.0000000 37.93723 30.8% - 0s 0 0 37.73253 0 105 29.00000 37.73253 30.1% - 0s H 0 0 30.0000000 37.73253 25.8% - 0s 0 0 37.52600 0 106 30.00000 37.52600 25.1% - 0s 0 0 37.17382 0 105 30.00000 37.17382 23.9% - 0s 0 0 37.13028 0 106 30.00000 37.13028 23.8% - 0s 0 0 37.03898 0 106 30.00000 37.03898 23.5% - 0s 0 0 36.98206 0 103 30.00000 36.98206 23.3% - 0s 0 0 36.83605 0 105 30.00000 36.83605 22.8% - 0s 0 0 36.79013 0 107 30.00000 36.79013 22.6% - 0s 0 0 36.73030 0 106 30.00000 36.73030 22.4% - 0s 0 0 36.66770 0 106 30.00000 36.66770 22.2% - 0s 0 0 36.63055 0 106 30.00000 36.63055 22.1% - 0s 0 0 36.62383 0 106 30.00000 36.62383 22.1% - 0s 0 0 36.62383 0 106 30.00000 36.62383 22.1% - 0s 0 2 36.62218 0 106 30.00000 36.62218 22.1% - 0s H 38 15 31.0000000 36.38788 17.4% 30.3 0s * 288 37 7 32.0000000 34.52941 7.90% 29.1 0s Cutting planes: Clique: 2 Zero half: 63 Explored 397 nodes (11926 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%