Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:49:53 2012 Optimize a model with 731 rows, 165 columns and 1462 nonzeros Presolve removed 178 rows and 3 columns Presolve time: 0.01s Presolved: 553 rows, 162 columns, 1208 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.550000e+01, 247 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.50000 0 123 47.00000 65.50000 39.4% - 0s 0 0 64.41688 0 154 47.00000 64.41688 37.1% - 0s 0 0 63.46461 0 153 47.00000 63.46461 35.0% - 0s H 0 0 49.0000000 63.46461 29.5% - 0s 0 0 62.71782 0 156 49.00000 62.71782 28.0% - 0s 0 0 62.33362 0 157 49.00000 62.33362 27.2% - 0s 0 0 61.96205 0 155 49.00000 61.96205 26.5% - 0s H 0 0 50.0000000 61.96205 23.9% - 0s 0 0 61.71110 0 161 50.00000 61.71110 23.4% - 0s 0 0 61.60751 0 156 50.00000 61.60751 23.2% - 0s H 0 0 53.0000000 61.60751 16.2% - 0s 0 0 61.49975 0 155 53.00000 61.49975 16.0% - 0s 0 0 61.48884 0 156 53.00000 61.48884 16.0% - 0s 0 0 61.48884 0 155 53.00000 61.48884 16.0% - 0s 0 2 61.48855 0 154 53.00000 61.48855 16.0% - 0s H 44 28 54.0000000 61.47206 13.8% 41.8 0s * 46 23 18 55.0000000 61.47206 11.8% 40.2 0s 614 167 57.95455 4 159 55.00000 58.91791 7.12% 38.3 5s 627 175 56.98077 8 160 55.00000 58.91791 7.12% 37.5 10s 1771 136 56.30233 19 123 55.00000 56.99010 3.62% 43.8 15s Cutting planes: Gomory: 2 Zero half: 225 Explored 2001 nodes (85069 simplex iterations) in 15.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%