Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:53:30 2013 Optimize a model with 640 rows, 14240 columns and 118620 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.21s Presolved: 620 rows, 14220 columns, 108600 nonzeros Variable types: 14040 continuous, 180 integer (180 binary) Root relaxation: objective 3.573401e+04, 458 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 9 - 35734.0139 - - 0s 0 0 35734.5382 0 9 - 35734.5382 - - 0s 0 0 35734.5926 0 9 - 35734.5926 - - 0s 0 0 35734.6857 0 9 - 35734.6857 - - 0s 0 0 35734.7010 0 9 - 35734.7010 - - 0s 0 0 35734.8488 0 9 - 35734.8488 - - 0s 0 0 35734.8488 0 9 - 35734.8488 - - 0s 0 0 35734.8508 0 9 - 35734.8508 - - 0s 0 0 35734.8647 0 9 - 35734.8647 - - 0s 0 0 35734.8647 0 9 - 35734.8647 - - 0s 0 0 35734.8647 0 9 - 35734.8647 - - 1s 0 2 35736.0357 0 9 - 35736.0357 - - 2s * 31 16 28 36181.017385 35751.8680 1.19% 12.3 2s H 61 24 36177.968922 35769.9584 1.13% 10.0 2s * 68 25 34 36177.957496 35769.9584 1.13% 9.2 2s * 86 24 15 36175.683193 35801.6894 1.03% 10.6 2s H 88 21 36175.582367 35801.6894 1.03% 10.3 2s * 93 22 15 36175.480717 35801.6894 1.03% 10.0 2s * 95 22 16 36175.332039 35801.6894 1.03% 9.8 2s * 142 18 14 36174.849103 36169.5244 0.01% 8.7 2s * 150 19 17 36174.630381 36169.5244 0.01% 8.4 2s Cutting planes: Flow cover: 11 Explored 177 nodes (2373 simplex iterations) in 3.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617463038139e+04, best bound 3.617121745011e+04, gap 0.0094%