Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:41:20 2012 Optimize a model with 654 rows, 158 columns and 1308 nonzeros Presolve removed 127 rows and 0 columns Presolve time: 0.00s Presolved: 527 rows, 158 columns, 1138 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.450000e+01, 369 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.50000 0 125 48.00000 64.50000 34.4% - 0s 0 0 63.38221 0 158 48.00000 63.38221 32.0% - 0s 0 0 62.46632 0 158 48.00000 62.46632 30.1% - 0s 0 0 61.60574 0 155 48.00000 61.60574 28.3% - 0s 0 0 61.18182 0 156 48.00000 61.18182 27.5% - 0s 0 0 60.69579 0 154 48.00000 60.69579 26.4% - 0s 0 0 60.47894 0 156 48.00000 60.47894 26.0% - 0s H 0 0 49.0000000 60.47894 23.4% - 0s 0 0 60.29888 0 156 49.00000 60.29888 23.1% - 0s 0 0 60.15750 0 157 49.00000 60.15750 22.8% - 0s 0 0 60.01473 0 156 49.00000 60.01473 22.5% - 0s 0 0 59.90843 0 158 49.00000 59.90843 22.3% - 0s 0 0 59.80918 0 156 49.00000 59.80918 22.1% - 0s H 0 0 50.0000000 59.80918 19.6% - 0s 0 0 59.79805 0 155 50.00000 59.79805 19.6% - 0s 0 0 59.74946 0 157 50.00000 59.74946 19.5% - 0s 0 0 59.74946 0 156 50.00000 59.74946 19.5% - 0s 0 2 59.74876 0 156 50.00000 59.74876 19.5% - 0s H 51 25 52.0000000 59.36057 14.2% 54.0 0s H 611 189 53.0000000 57.13333 7.80% 40.5 3s 1118 193 54.40000 19 120 53.00000 56.55427 6.71% 42.8 5s Cutting planes: Gomory: 7 Zero half: 68 Explored 1945 nodes (71351 simplex iterations) in 5.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%