Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:23 2013 Optimize a model with 484 rows, 19404 columns and 38764 nonzeros Presolve time: 0.03s Presolved: 484 rows, 19404 columns, 38764 nonzeros Variable types: 19360 continuous, 44 integer (44 binary) Root relaxation: objective 3.962685e+04, 613 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39626.8549 0 10 - 39626.8549 - - 0s H 0 0 40283.000000 39626.8549 1.63% - 0s H 0 0 40011.000000 39626.8549 0.96% - 0s 0 0 39865.6896 0 4 40011.0000 39865.6896 0.36% - 0s 0 0 39877.3523 0 5 40011.0000 39877.3523 0.33% - 0s 0 0 39879.0255 0 5 40011.0000 39879.0255 0.33% - 0s 0 0 39879.1376 0 5 40011.0000 39879.1376 0.33% - 0s 0 0 39879.3527 0 6 40011.0000 39879.3527 0.33% - 0s 0 0 39879.6102 0 5 40011.0000 39879.6102 0.33% - 0s 0 0 39880.1234 0 4 40011.0000 39880.1234 0.33% - 0s H 0 0 39930.000000 39880.1234 0.12% - 0s 0 0 39880.1234 0 8 39930.0000 39880.1234 0.12% - 0s 0 0 39917.0074 0 3 39930.0000 39917.0074 0.03% - 0s 0 0 39917.8519 0 2 39930.0000 39917.8519 0.03% - 0s 0 0 39918.2593 0 1 39930.0000 39918.2593 0.03% - 0s 0 0 39918.2593 0 1 39930.0000 39918.2593 0.03% - 0s 0 0 39920.7222 0 2 39930.0000 39920.7222 0.02% - 0s 0 0 39922.2222 0 1 39930.0000 39922.2222 0.02% - 0s 0 2 39924.0000 0 1 39930.0000 39924.0000 0.02% - 0s * 1 1 1 39927.000000 39927.0000 0.0% 20.0 0s Cutting planes: Implied bound: 19 Flow cover: 6 Explored 2 nodes (1249 simplex iterations) in 0.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.992700000000e+04, best bound 3.992700000000e+04, gap 0.0%