Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:48 2012 Optimize a model with 570 rows, 106 columns and 1140 nonzeros Presolve removed 193 rows and 0 columns Presolve time: 0.00s Presolved: 377 rows, 106 columns, 927 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.776157e+01, 236 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.76157 0 104 24.00000 37.76157 57.3% - 0s H 0 0 27.0000000 37.76157 39.9% - 0s 0 0 37.00000 0 103 27.00000 37.00000 37.0% - 0s 0 0 37.00000 0 103 27.00000 37.00000 37.0% - 0s H 0 0 28.0000000 37.00000 32.1% - 0s 0 0 37.00000 0 101 28.00000 37.00000 32.1% - 0s H 0 0 29.0000000 37.00000 27.6% - 0s 0 0 37.00000 0 99 29.00000 37.00000 27.6% - 0s 0 0 36.98101 0 105 29.00000 36.98101 27.5% - 0s 0 0 36.72588 0 106 29.00000 36.72588 26.6% - 0s 0 0 36.63727 0 106 29.00000 36.63727 26.3% - 0s 0 0 36.47327 0 105 29.00000 36.47327 25.8% - 0s 0 0 36.44996 0 106 29.00000 36.44996 25.7% - 0s 0 0 36.38956 0 106 29.00000 36.38956 25.5% - 0s 0 0 36.33035 0 106 29.00000 36.33035 25.3% - 0s 0 0 36.29439 0 106 29.00000 36.29439 25.2% - 0s 0 0 36.23636 0 106 29.00000 36.23636 25.0% - 0s 0 0 36.21150 0 106 29.00000 36.21150 24.9% - 0s 0 0 36.17395 0 106 29.00000 36.17395 24.7% - 0s 0 0 36.15885 0 106 29.00000 36.15885 24.7% - 0s 0 0 36.15885 0 106 29.00000 36.15885 24.7% - 0s 0 2 36.15627 0 106 29.00000 36.15627 24.7% - 0s * 14 10 9 30.0000000 36.15627 20.5% 36.6 0s Explored 2908 nodes (53275 simplex iterations) in 1.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%