Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:52:54 2013 Optimize a model with 2310 rows, 441210 columns and 882210 nonzeros Presolve time: 1.55s Presolved: 2310 rows, 441210 columns, 882210 nonzeros Variable types: 441000 continuous, 210 integer (210 binary) Root relaxation: objective 4.491270e+05, 11896 iterations, 1.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 449126.979 0 9 - 449126.979 - - 3s H 0 0 494919.00000 449126.979 9.25% - 5s H 0 0 455980.00000 449126.979 1.50% - 7s 0 0 449400.381 0 5 455980.000 449400.381 1.44% - 8s 0 0 449400.381 0 9 455980.000 449400.381 1.44% - 12s 0 0 449400.396 0 5 455980.000 449400.396 1.44% - 14s 0 0 449415.714 0 4 455980.000 449415.714 1.44% - 15s 0 0 449418.835 0 5 455980.000 449418.835 1.44% - 16s 0 0 449424.475 0 6 455980.000 449424.475 1.44% - 16s 0 0 449425.823 0 4 455980.000 449425.823 1.44% - 17s 0 0 449425.823 0 4 455980.000 449425.823 1.44% - 18s 0 0 449425.823 0 4 455980.000 449425.823 1.44% - 19s 0 0 449425.823 0 4 455980.000 449425.823 1.44% - 19s 0 2 449432.717 0 4 455980.000 449432.717 1.44% - 22s 3 5 449978.629 2 5 455980.000 449747.651 1.37% 476 25s H 12 12 453020.00000 449909.145 0.69% 235 29s H 13 13 453007.00000 449909.145 0.68% 220 29s H 14 14 452193.00000 449909.145 0.51% 207 29s 18 17 449963.000 16 1 452193.000 449909.145 0.51% 163 30s H 24 16 451992.00000 449909.145 0.46% 123 30s H 28 16 450801.00000 449909.145 0.20% 106 31s * 31 12 29 450136.00000 449909.145 0.05% 96.1 31s 52 1 cutoff 11 450136.000 450121.325 0.00% 120 35s Cutting planes: Implied bound: 217 Flow cover: 6 Explored 53 nodes (33053 simplex iterations) in 35.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.501360000000e+05, best bound 4.501213248360e+05, gap 0.0033%