Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:05 2012 Optimize a model with 570 rows, 108 columns and 1140 nonzeros Presolve removed 222 rows and 0 columns Presolve time: 0.00s Presolved: 348 rows, 108 columns, 883 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.731425e+01, 238 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.31425 0 105 27.00000 37.31425 38.2% - 0s 0 0 37.01973 0 105 27.00000 37.01973 37.1% - 0s 0 0 36.87472 0 105 27.00000 36.87472 36.6% - 0s 0 0 36.66795 0 105 27.00000 36.66795 35.8% - 0s H 0 0 28.0000000 36.66795 31.0% - 0s 0 0 36.54227 0 105 28.00000 36.54227 30.5% - 0s 0 0 36.49509 0 105 28.00000 36.49509 30.3% - 0s 0 0 36.40454 0 105 28.00000 36.40454 30.0% - 0s 0 0 36.25428 0 106 28.00000 36.25428 29.5% - 0s 0 0 36.16707 0 106 28.00000 36.16707 29.2% - 0s 0 0 36.10406 0 105 28.00000 36.10406 28.9% - 0s H 0 0 29.0000000 36.10406 24.5% - 0s 0 0 35.98256 0 106 29.00000 35.98256 24.1% - 0s 0 0 35.91478 0 107 29.00000 35.91478 23.8% - 0s 0 0 35.90917 0 106 29.00000 35.90917 23.8% - 0s 0 0 35.86961 0 105 29.00000 35.86961 23.7% - 0s 0 0 35.84225 0 103 29.00000 35.84225 23.6% - 0s 0 0 35.83137 0 103 29.00000 35.83137 23.6% - 0s 0 2 35.82336 0 103 29.00000 35.82336 23.5% - 0s * 140 32 11 30.0000000 34.42754 14.8% 25.7 0s Explored 2253 nodes (45240 simplex iterations) in 1.73 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%