Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:32:53 2012 Optimize a model with 442 rows, 441 columns and 2012 nonzeros Presolve removed 89 rows and 53 columns Presolve time: 0.02s Presolved: 353 rows, 388 columns, 4972 nonzeros Variable types: 20 continuous, 368 integer (368 binary) Root relaxation: objective 1.489156e+02, 77 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 148.91563 0 35 - 148.91563 - - 0s 0 0 176.49116 0 33 - 176.49116 - - 0s 0 0 180.54289 0 47 - 180.54289 - - 0s 0 0 183.70833 0 47 - 183.70833 - - 0s 0 0 183.83333 0 47 - 183.83333 - - 0s 0 0 183.83333 0 47 - 183.83333 - - 0s 0 0 183.83333 0 47 - 183.83333 - - 0s 0 2 185.08333 0 45 - 185.08333 - - 0s * 127 90 49 369.0000000 204.72500 44.5% 9.3 0s * 172 109 36 300.0000000 204.95000 31.7% 9.0 0s H 457 235 271.0000000 210.00000 22.5% 9.0 0s H 600 241 261.0000000 212.26471 18.7% 8.8 0s H 607 233 253.0000000 212.26471 16.1% 8.7 0s H 611 224 249.0000000 212.26471 14.8% 8.7 0s Cutting planes: Gomory: 36 Cover: 8 Implied bound: 42 Clique: 3 MIR: 65 GUB cover: 5 Zero half: 37 Explored 2936 nodes (33845 simplex iterations) in 3.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.490000000000e+02, best bound 2.490000000000e+02, gap 0.0%