Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:47:06 2012 Optimize a model with 662 rows, 163 columns and 1324 nonzeros Presolve removed 112 rows and 0 columns Presolve time: 0.00s Presolved: 550 rows, 163 columns, 1170 nonzeros Variable types: 0 continuous, 163 integer (163 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.900000e+01, 255 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.00000 0 132 47.00000 69.00000 46.8% - 0s H 0 0 48.0000000 69.00000 43.8% - 0s 0 0 67.50000 0 158 48.00000 67.50000 40.6% - 0s 0 0 66.85000 0 161 48.00000 66.85000 39.3% - 0s 0 0 65.68103 0 158 48.00000 65.68103 36.8% - 0s 0 0 64.75890 0 161 48.00000 64.75890 34.9% - 0s 0 0 64.11236 0 160 48.00000 64.11236 33.6% - 0s 0 0 63.69375 0 161 48.00000 63.69375 32.7% - 0s 0 0 63.34189 0 162 48.00000 63.34189 32.0% - 0s 0 0 63.21878 0 162 48.00000 63.21878 31.7% - 0s 0 0 63.09405 0 161 48.00000 63.09405 31.4% - 0s H 0 0 49.0000000 63.09405 28.8% - 0s 0 0 63.04539 0 161 49.00000 63.04539 28.7% - 0s 0 0 63.04539 0 160 49.00000 63.04539 28.7% - 0s H 0 0 50.0000000 63.04539 26.1% - 0s 0 2 63.04241 0 160 50.00000 63.04241 26.1% - 0s H 41 24 52.0000000 62.81983 20.8% 46.3 0s H 42 21 54.0000000 62.81983 16.3% 46.2 0s H 64 25 56.0000000 62.69839 12.0% 44.7 0s * 71 26 11 57.0000000 62.69839 10.0% 41.6 0s Cutting planes: Gomory: 2 Zero half: 215 Explored 884 nodes (41369 simplex iterations) in 1.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%