Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:24 2012 Optimize a model with 512 rows, 102 columns and 1024 nonzeros Presolve removed 162 rows and 0 columns Presolve time: 0.00s Presolved: 350 rows, 102 columns, 833 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.725000e+01, 214 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.25000 0 88 24.00000 37.25000 55.2% - 0s H 0 0 27.0000000 37.25000 38.0% - 0s 0 0 36.50376 0 100 27.00000 36.50376 35.2% - 0s 0 0 35.94844 0 101 27.00000 35.94844 33.1% - 0s 0 0 35.60261 0 99 27.00000 35.60261 31.9% - 0s 0 0 35.45400 0 100 27.00000 35.45400 31.3% - 0s H 0 0 28.0000000 35.45400 26.6% - 0s 0 0 35.22615 0 99 28.00000 35.22615 25.8% - 0s 0 0 35.08757 0 99 28.00000 35.08757 25.3% - 0s 0 0 35.02349 0 100 28.00000 35.02349 25.1% - 0s 0 0 34.99508 0 100 28.00000 34.99508 25.0% - 0s 0 0 34.95173 0 100 28.00000 34.95173 24.8% - 0s 0 0 34.86792 0 101 28.00000 34.86792 24.5% - 0s 0 0 34.72219 0 101 28.00000 34.72219 24.0% - 0s 0 0 34.60906 0 102 28.00000 34.60906 23.6% - 0s 0 0 34.60633 0 102 28.00000 34.60633 23.6% - 0s 0 2 34.60541 0 102 28.00000 34.60541 23.6% - 0s * 83 31 11 29.0000000 33.86458 16.8% 30.7 0s Cutting planes: Gomory: 3 Zero half: 47 Explored 2105 nodes (43683 simplex iterations) in 4.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%