Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:21 2013 Optimize a model with 4320 rows, 12060 columns and 36100 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.19s Presolved: 4300 rows, 12040 columns, 32080 nonzeros Variable types: 8040 continuous, 4000 integer (4000 binary) Root relaxation: objective 4.636776e+04, 619 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46367.7551 0 4 - 46367.7551 - - 0s 0 0 46411.3217 0 4 - 46411.3217 - - 0s 0 0 46420.9551 0 6 - 46420.9551 - - 0s 0 0 46421.6124 0 4 - 46421.6124 - - 0s 0 0 46427.8399 0 7 - 46427.8399 - - 0s 0 0 46431.5502 0 6 - 46431.5502 - - 0s 0 0 46437.1914 0 6 - 46437.1914 - - 0s 0 0 46439.6623 0 4 - 46439.6623 - - 0s 0 0 46439.8624 0 10 - 46439.8624 - - 0s 0 0 46443.3826 0 4 - 46443.3826 - - 0s 0 0 46443.6736 0 9 - 46443.6736 - - 0s 0 0 46445.8233 0 8 - 46445.8233 - - 0s 0 0 46447.2186 0 8 - 46447.2186 - - 0s 0 0 46447.8630 0 9 - 46447.8630 - - 0s 0 0 46448.7948 0 8 - 46448.7948 - - 0s 0 0 46449.3988 0 6 - 46449.3988 - - 0s 0 0 46449.7420 0 8 - 46449.7420 - - 1s 0 0 46450.4569 0 8 - 46450.4569 - - 1s 0 0 46451.8013 0 8 - 46451.8013 - - 1s 0 0 46452.0414 0 4 - 46452.0414 - - 1s 0 0 46452.0437 0 9 - 46452.0437 - - 1s 0 0 46452.1499 0 9 - 46452.1499 - - 1s 0 0 46452.1499 0 9 - 46452.1499 - - 1s 0 2 46452.1499 0 9 - 46452.1499 - - 2s * 21 7 11 46653.827692 46653.6286 0.00% 39.6 2s Cutting planes: Gomory: 4 Implied bound: 38 Flow cover: 3 Explored 22 nodes (2242 simplex iterations) in 2.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.665382769172e+04, best bound 4.665362864615e+04, gap 0.0004%