Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:31:29 2012 Optimize a model with 809 rows, 180 columns and 1618 nonzeros Presolve removed 180 rows and 0 columns Presolve time: 0.01s Presolved: 629 rows, 180 columns, 1372 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.332979e+01, 433 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.32979 0 170 54.00000 73.32979 35.8% - 0s H 0 0 57.0000000 73.32979 28.6% - 0s 0 0 72.26540 0 179 57.00000 72.26540 26.8% - 0s H 0 0 59.0000000 72.26540 22.5% - 0s 0 0 71.33727 0 178 59.00000 71.33727 20.9% - 0s 0 0 70.64519 0 179 59.00000 70.64519 19.7% - 0s 0 0 70.21060 0 179 59.00000 70.21060 19.0% - 0s 0 0 69.81430 0 177 59.00000 69.81430 18.3% - 0s 0 0 69.50089 0 178 59.00000 69.50089 17.8% - 0s 0 0 69.25644 0 176 59.00000 69.25644 17.4% - 0s 0 0 69.11175 0 176 59.00000 69.11175 17.1% - 0s 0 0 69.04493 0 177 59.00000 69.04493 17.0% - 0s 0 0 69.00240 0 175 59.00000 69.00240 17.0% - 0s 0 0 68.93513 0 178 59.00000 68.93513 16.8% - 0s 0 0 68.84546 0 176 59.00000 68.84546 16.7% - 0s 0 0 68.78273 0 175 59.00000 68.78273 16.6% - 0s 0 0 68.64663 0 176 59.00000 68.64663 16.4% - 0s 0 0 68.52712 0 176 59.00000 68.52712 16.1% - 0s 0 0 68.48210 0 176 59.00000 68.48210 16.1% - 0s 0 0 68.48210 0 176 59.00000 68.48210 16.1% - 0s H 0 0 61.0000000 68.48210 12.3% - 0s 0 2 68.47589 0 176 61.00000 68.47589 12.3% - 0s H 85 22 63.0000000 67.20766 6.68% 54.8 0s Cutting planes: Zero half: 140 Explored 366 nodes (20195 simplex iterations) in 1.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.300000000000e+01, best bound 6.300000000000e+01, gap 0.0%