Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:53 2013 Optimize a model with 23616 rows, 23136 columns and 92256 nonzeros Presolve removed 48 rows and 0 columns Presolve time: 0.10s Presolved: 23568 rows, 23136 columns, 92208 nonzeros Variable types: 23088 continuous, 48 integer (48 binary) Root relaxation: objective 4.105444e+04, 3457 iterations, 1.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41054.4359 0 40 - 41054.4359 - - 1s H 0 0 49743.000000 41054.4359 17.5% - 1s 0 0 47078.2457 0 11 49743.0000 47078.2457 5.36% - 2s H 0 0 48461.000000 47078.2457 2.85% - 2s H 0 0 47575.000000 47078.2457 1.04% - 3s 0 0 47188.2710 0 6 47575.0000 47188.2710 0.81% - 3s 0 0 47223.9631 0 5 47575.0000 47223.9631 0.74% - 3s 0 0 47346.9034 0 7 47575.0000 47346.9034 0.48% - 3s 0 0 47346.9167 0 5 47575.0000 47346.9167 0.48% - 4s 0 2 47356.2281 0 5 47575.0000 47356.2281 0.46% - 4s * 9 6 8 47493.000000 47424.5423 0.14% 54.4 4s Cutting planes: Implied bound: 44 Explored 16 nodes (6582 simplex iterations) in 4.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.749300000000e+04, best bound 4.749300000000e+04, gap 0.0%