Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:40:22 2012 Optimize a model with 610 rows, 157 columns and 1220 nonzeros Presolve removed 124 rows and 0 columns Presolve time: 0.00s Presolved: 486 rows, 157 columns, 1047 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.465873e+01, 300 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.65873 0 153 49.00000 64.65873 32.0% - 0s H 0 0 51.0000000 64.65873 26.8% - 0s H 0 0 52.0000000 64.65873 24.3% - 0s 0 0 64.17515 0 155 52.00000 64.17515 23.4% - 0s 0 0 63.65076 0 156 52.00000 63.65076 22.4% - 0s H 0 0 53.0000000 63.65076 20.1% - 0s 0 0 62.91633 0 155 53.00000 62.91633 18.7% - 0s 0 0 62.21818 0 153 53.00000 62.21818 17.4% - 0s H 0 0 54.0000000 62.21818 15.2% - 0s 0 0 61.96948 0 155 54.00000 61.96948 14.8% - 0s 0 0 61.57965 0 157 54.00000 61.57965 14.0% - 0s 0 0 61.47659 0 156 54.00000 61.47659 13.8% - 0s 0 0 61.36800 0 157 54.00000 61.36800 13.6% - 0s 0 0 61.30085 0 155 54.00000 61.30085 13.5% - 0s 0 0 61.25715 0 155 54.00000 61.25715 13.4% - 0s 0 0 61.23992 0 157 54.00000 61.23992 13.4% - 0s 0 0 61.23992 0 157 54.00000 61.23992 13.4% - 0s 0 2 61.23733 0 157 54.00000 61.23733 13.4% - 0s H 30 14 55.0000000 60.94957 10.8% 45.7 0s * 35 12 8 56.0000000 60.94957 8.84% 42.7 0s Cutting planes: Zero half: 113 Explored 349 nodes (13731 simplex iterations) in 0.61 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%