Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:03:06 2012 Optimize a model with 3402 rows, 3280 columns and 14518 nonzeros Presolve removed 238 rows and 80 columns Presolve time: 0.11s Presolved: 3164 rows, 3200 columns, 14078 nonzeros Variable types: 1560 continuous, 1640 integer (1640 binary) Root relaxation: objective 3.738488e+02, 4754 iterations, 0.28 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 373.84878 0 90 - 373.84878 - - 0s 0 0 439.26966 0 96 - 439.26966 - - 0s 0 0 450.27994 0 75 - 450.27994 - - 0s 0 0 453.95702 0 71 - 453.95702 - - 0s 0 0 454.80185 0 72 - 454.80185 - - 0s 0 0 455.36173 0 75 - 455.36173 - - 0s 0 0 456.22298 0 71 - 456.22298 - - 0s 0 0 456.85578 0 72 - 456.85578 - - 0s 0 0 456.95025 0 75 - 456.95025 - - 0s 0 0 456.95025 0 73 - 456.95025 - - 0s 0 0 456.95025 0 75 - 456.95025 - - 0s 0 0 456.95025 0 75 - 456.95025 - - 1s 0 2 456.98337 0 75 - 456.98337 - - 2s * 160 84 44 498.0000000 464.20799 6.79% 106 4s 237 104 484.50476 17 58 498.00000 466.09705 6.41% 98.7 5s H 671 164 497.0000000 476.00709 4.22% 81.4 9s Cutting planes: Gomory: 15 Cover: 11 Implied bound: 5 Flow cover: 38 GUB cover: 3 Explored 852 nodes (64732 simplex iterations) in 9.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.970000000000e+02, best bound 4.970000000000e+02, gap 0.0%