Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:36 2012 Optimize a model with 597 rows, 155 columns and 1194 nonzeros Presolve removed 112 rows and 0 columns Presolve time: 0.00s Presolved: 485 rows, 155 columns, 1045 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.466667e+01, 277 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.66667 0 143 45.00000 64.66667 43.7% - 0s H 0 0 48.0000000 64.66667 34.7% - 0s 0 0 62.00000 0 145 48.00000 62.00000 29.2% - 0s H 0 0 49.0000000 62.00000 26.5% - 0s 0 0 61.81250 0 150 49.00000 61.81250 26.1% - 0s H 0 0 50.0000000 61.81250 23.6% - 0s 0 0 61.37553 0 151 50.00000 61.37553 22.8% - 0s H 0 0 51.0000000 61.37553 20.3% - 0s 0 0 60.98901 0 153 51.00000 60.98901 19.6% - 0s 0 0 60.75463 0 153 51.00000 60.75463 19.1% - 0s 0 0 60.49148 0 154 51.00000 60.49148 18.6% - 0s 0 0 60.28675 0 152 51.00000 60.28675 18.2% - 0s 0 0 60.04945 0 154 51.00000 60.04945 17.7% - 0s 0 0 59.89169 0 152 51.00000 59.89169 17.4% - 0s 0 0 59.80298 0 153 51.00000 59.80298 17.3% - 0s H 0 0 52.0000000 59.80298 15.0% - 0s 0 0 59.72866 0 154 52.00000 59.72866 14.9% - 0s 0 0 59.63782 0 155 52.00000 59.63782 14.7% - 0s 0 0 59.63591 0 154 52.00000 59.63591 14.7% - 0s 0 0 59.55862 0 154 52.00000 59.55862 14.5% - 0s 0 0 59.54144 0 155 52.00000 59.54144 14.5% - 0s 0 0 59.54144 0 155 52.00000 59.54144 14.5% - 0s 0 2 59.53690 0 155 52.00000 59.53690 14.5% - 0s H 81 43 53.0000000 58.82956 11.0% 45.8 0s H 355 90 54.0000000 57.50847 6.50% 40.6 0s Cutting planes: Gomory: 2 Zero half: 162 Explored 1019 nodes (38064 simplex iterations) in 1.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%