Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:59 2012 Optimize a model with 629 rows, 154 columns and 1258 nonzeros Presolve removed 125 rows and 0 columns Presolve time: 0.00s Presolved: 504 rows, 154 columns, 1094 nonzeros Variable types: 0 continuous, 154 integer (154 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.500000e+01, 261 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.00000 0 124 51.00000 65.00000 27.5% - 0s 0 0 63.90000 0 147 51.00000 63.90000 25.3% - 0s 0 0 62.84615 0 151 51.00000 62.84615 23.2% - 0s H 0 0 52.0000000 62.84615 20.9% - 0s 0 0 61.99517 0 148 52.00000 61.99517 19.2% - 0s H 0 0 54.0000000 61.99517 14.8% - 0s 0 0 61.31102 0 154 54.00000 61.31102 13.5% - 0s H 0 0 55.0000000 61.31102 11.5% - 0s 0 0 60.89408 0 151 55.00000 60.89408 10.7% - 0s 0 0 60.57530 0 153 55.00000 60.57530 10.1% - 0s 0 0 60.48976 0 152 55.00000 60.48976 10.0% - 0s 0 0 60.31485 0 152 55.00000 60.31485 9.66% - 0s 0 0 60.19699 0 149 55.00000 60.19699 9.45% - 0s 0 0 60.03424 0 153 55.00000 60.03424 9.15% - 0s 0 0 59.94963 0 153 55.00000 59.94963 9.00% - 0s 0 0 59.83020 0 151 55.00000 59.83020 8.78% - 0s 0 0 59.77208 0 152 55.00000 59.77208 8.68% - 0s 0 0 59.77208 0 152 55.00000 59.77208 8.68% - 0s 0 2 59.77208 0 152 55.00000 59.77208 8.68% - 0s * 10 9 8 56.0000000 59.72991 6.66% 63.5 0s Cutting planes: Zero half: 157 Explored 146 nodes (8479 simplex iterations) in 0.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%