Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:28 2012 Optimize a model with 442 rows, 441 columns and 1941 nonzeros Presolve removed 267 rows and 188 columns Presolve time: 0.00s Presolved: 175 rows, 253 columns, 1535 nonzeros Variable types: 19 continuous, 234 integer (234 binary) Root relaxation: objective 2.552811e+02, 73 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 255.28109 0 32 - 255.28109 - - 0s 0 0 289.00000 0 23 - 289.00000 - - 0s 0 0 297.00000 0 29 - 297.00000 - - 0s 0 0 297.00000 0 28 - 297.00000 - - 0s 0 0 297.00000 0 22 - 297.00000 - - 0s 0 2 302.50000 0 22 - 302.50000 - - 0s * 252 54 12 329.0000000 312.00000 5.17% 6.9 0s Cutting planes: Gomory: 1 Cover: 36 Implied bound: 28 Clique: 5 MIR: 16 GUB cover: 4 Explored 580 nodes (3728 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.290000000000e+02, best bound 3.290000000000e+02, gap 0.0%