Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:45 2012 Optimize a model with 570 rows, 105 columns and 1140 nonzeros Presolve removed 220 rows and 0 columns Presolve time: 0.00s Presolved: 350 rows, 105 columns, 890 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.641289e+01, 215 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.41289 0 102 27.00000 36.41289 34.9% - 0s H 0 0 28.0000000 36.41289 30.0% - 0s 0 0 35.96320 0 100 28.00000 35.96320 28.4% - 0s 0 0 35.68816 0 99 28.00000 35.68816 27.5% - 0s 0 0 35.54559 0 104 28.00000 35.54559 26.9% - 0s 0 0 35.44661 0 104 28.00000 35.44661 26.6% - 0s 0 0 35.25658 0 101 28.00000 35.25658 25.9% - 0s 0 0 35.21054 0 105 28.00000 35.21054 25.8% - 0s 0 0 35.16480 0 104 28.00000 35.16480 25.6% - 0s 0 0 35.15243 0 104 28.00000 35.15243 25.5% - 0s 0 0 35.13626 0 103 28.00000 35.13626 25.5% - 0s 0 0 35.11561 0 104 28.00000 35.11561 25.4% - 0s 0 0 35.10728 0 104 28.00000 35.10728 25.4% - 0s 0 0 35.10728 0 104 28.00000 35.10728 25.4% - 0s 0 2 35.10529 0 104 28.00000 35.10529 25.4% - 0s * 37 13 10 29.0000000 34.83435 20.1% 33.1 0s * 53 14 7 30.0000000 34.35229 14.5% 32.5 0s Cutting planes: Clique: 2 Zero half: 48 Explored 452 nodes (10879 simplex iterations) in 0.41 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%