Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:07 2012 Optimize a model with 548 rows, 108 columns and 1096 nonzeros Presolve removed 191 rows and 0 columns Presolve time: 0.00s Presolved: 357 rows, 108 columns, 869 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.925641e+01, 199 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.25641 0 103 29.00000 39.25641 35.4% - 0s H 0 0 31.0000000 39.25641 26.6% - 0s 0 0 38.75300 0 102 31.00000 38.75300 25.0% - 0s 0 0 38.35174 0 103 31.00000 38.35174 23.7% - 0s H 0 0 33.0000000 38.35174 16.2% - 0s 0 0 37.97822 0 104 33.00000 37.97822 15.1% - 0s H 0 0 34.0000000 37.97822 11.7% - 0s H 0 0 35.0000000 37.97822 8.51% - 0s 0 0 37.86705 0 104 35.00000 37.86705 8.19% - 0s 0 0 37.72733 0 106 35.00000 37.72733 7.79% - 0s 0 0 37.62144 0 101 35.00000 37.62144 7.49% - 0s 0 0 37.48039 0 103 35.00000 37.48039 7.09% - 0s 0 0 37.40525 0 106 35.00000 37.40525 6.87% - 0s 0 0 37.35029 0 105 35.00000 37.35029 6.72% - 0s 0 0 37.32657 0 107 35.00000 37.32657 6.65% - 0s 0 0 37.32319 0 107 35.00000 37.32319 6.64% - 0s 0 0 37.32319 0 107 35.00000 37.32319 6.64% - 0s 0 2 37.31928 0 107 35.00000 37.31928 6.63% - 0s Cutting planes: Clique: 3 Zero half: 45 Explored 21 nodes (1476 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%