Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:27:31 2012 Optimize a model with 814 rows, 179 columns and 1628 nonzeros Presolve removed 195 rows and 0 columns Presolve time: 0.01s Presolved: 619 rows, 179 columns, 1368 nonzeros Variable types: 0 continuous, 179 integer (179 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 7.104215e+01, 438 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.04215 0 174 49.00000 71.04215 45.0% - 0s H 0 0 53.0000000 71.04215 34.0% - 0s 0 0 70.08021 0 176 53.00000 70.08021 32.2% - 0s 0 0 68.98116 0 176 53.00000 68.98116 30.2% - 0s 0 0 68.59509 0 178 53.00000 68.59509 29.4% - 0s 0 0 68.42066 0 178 53.00000 68.42066 29.1% - 0s 0 0 68.30877 0 179 53.00000 68.30877 28.9% - 0s 0 0 68.07227 0 179 53.00000 68.07227 28.4% - 0s H 0 0 55.0000000 68.07227 23.8% - 0s 0 0 67.97414 0 179 55.00000 67.97414 23.6% - 0s 0 0 67.90232 0 179 55.00000 67.90232 23.5% - 0s 0 0 67.75849 0 178 55.00000 67.75849 23.2% - 0s 0 0 67.68166 0 177 55.00000 67.68166 23.1% - 0s 0 0 67.66348 0 178 55.00000 67.66348 23.0% - 0s 0 0 67.63934 0 178 55.00000 67.63934 23.0% - 0s 0 0 67.63934 0 178 55.00000 67.63934 23.0% - 0s 0 2 67.63900 0 178 55.00000 67.63900 23.0% - 0s H 40 26 59.0000000 67.50364 14.4% 64.9 0s 652 255 62.50000 32 135 59.00000 64.93548 10.1% 54.1 5s 3217 675 61.16875 20 137 59.00000 62.40000 5.76% 38.3 10s Cutting planes: Gomory: 7 Clique: 1 Zero half: 51 Explored 5754 nodes (193243 simplex iterations) in 13.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%