Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:13:23 2012 Optimize a model with 795 rows, 175 columns and 1590 nonzeros Presolve removed 172 rows and 0 columns Presolve time: 0.00s Presolved: 623 rows, 175 columns, 1363 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.016667e+01, 346 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.16667 0 157 51.00000 70.16667 37.6% - 0s 0 0 68.24405 0 169 51.00000 68.24405 33.8% - 0s 0 0 67.65443 0 172 51.00000 67.65443 32.7% - 0s 0 0 67.41997 0 171 51.00000 67.41997 32.2% - 0s H 0 0 54.0000000 67.41997 24.9% - 0s 0 0 67.22785 0 171 54.00000 67.22785 24.5% - 0s 0 0 66.86487 0 174 54.00000 66.86487 23.8% - 0s 0 0 66.67145 0 173 54.00000 66.67145 23.5% - 0s 0 0 66.42609 0 173 54.00000 66.42609 23.0% - 0s 0 0 66.13698 0 172 54.00000 66.13698 22.5% - 0s 0 0 66.05695 0 173 54.00000 66.05695 22.3% - 0s 0 0 65.93205 0 172 54.00000 65.93205 22.1% - 0s 0 0 65.87731 0 172 54.00000 65.87731 22.0% - 0s 0 0 65.77654 0 173 54.00000 65.77654 21.8% - 0s 0 0 65.70073 0 172 54.00000 65.70073 21.7% - 0s 0 0 65.69460 0 174 54.00000 65.69460 21.7% - 0s 0 0 65.69460 0 174 54.00000 65.69460 21.7% - 0s H 0 0 57.0000000 65.69460 15.3% - 0s 0 2 65.68849 0 174 57.00000 65.68849 15.2% - 0s 644 227 61.11538 31 141 57.00000 62.60310 9.83% 52.8 5s * 954 243 34 58.0000000 62.60310 7.94% 51.0 5s Cutting planes: Gomory: 8 Clique: 1 Zero half: 67 Explored 3645 nodes (129116 simplex iterations) in 9.87 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%