Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:28 2012 Optimize a model with 393 rows, 124 columns and 786 nonzeros Presolve removed 59 rows and 2 columns Presolve time: 0.00s Presolved: 334 rows, 122 columns, 699 nonzeros Variable types: 0 continuous, 122 integer (122 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.550000e+01, 175 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.50000 0 103 46.00000 55.50000 20.7% - 0s 0 0 53.62500 0 106 46.00000 53.62500 16.6% - 0s 0 0 53.00000 0 115 46.00000 53.00000 15.2% - 0s 0 0 52.30719 0 118 46.00000 52.30719 13.7% - 0s 0 0 51.94118 0 119 46.00000 51.94118 12.9% - 0s H 0 0 47.0000000 51.94118 10.5% - 0s 0 0 51.82787 0 118 47.00000 51.82787 10.3% - 0s 0 0 51.52174 0 119 47.00000 51.52174 9.62% - 0s 0 0 51.43008 0 119 47.00000 51.43008 9.43% - 0s 0 0 51.32330 0 119 47.00000 51.32330 9.20% - 0s 0 0 51.25751 0 119 47.00000 51.25751 9.06% - 0s 0 0 51.17702 0 120 47.00000 51.17702 8.89% - 0s 0 0 51.17267 0 121 47.00000 51.17267 8.88% - 0s 0 0 51.17267 0 119 47.00000 51.17267 8.88% - 0s H 0 0 48.0000000 51.17267 6.61% - 0s 0 2 51.17267 0 119 48.00000 51.17267 6.61% - 0s * 4 4 3 49.0000000 51.16545 4.42% 48.5 0s Cutting planes: Zero half: 66 Explored 26 nodes (1556 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%