Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:41 2013 Optimize a model with 506 rows, 21206 columns and 42366 nonzeros Presolve time: 0.03s Presolved: 506 rows, 21206 columns, 42366 nonzeros Variable types: 21160 continuous, 46 integer (46 binary) Root relaxation: objective 5.406678e+04, 879 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54066.7825 0 8 - 54066.7825 - - 0s H 0 0 56171.000000 54066.7825 3.75% - 0s H 0 0 54829.000000 54066.7825 1.39% - 0s 0 0 54577.4231 0 6 54829.0000 54577.4231 0.46% - 0s 0 0 54590.0707 0 4 54829.0000 54590.0707 0.44% - 0s 0 0 54592.0692 0 4 54829.0000 54592.0692 0.43% - 0s 0 0 54593.0904 0 4 54829.0000 54593.0904 0.43% - 0s H 0 0 54688.000000 54593.0904 0.17% - 0s 0 0 54593.3148 0 2 54688.0000 54593.3148 0.17% - 0s H 0 0 54672.000000 54593.3148 0.14% - 0s 0 0 54593.3470 0 4 54672.0000 54593.3470 0.14% - 0s 0 0 54597.5834 0 6 54672.0000 54597.5834 0.14% - 0s 0 0 54606.8913 0 5 54672.0000 54606.8913 0.12% - 0s 0 0 54607.0743 0 4 54672.0000 54607.0743 0.12% - 0s H 0 0 54619.000000 54607.0743 0.02% - 0s 0 0 54607.0743 0 4 54619.0000 54607.0743 0.02% - 0s 0 0 54607.0743 0 4 54619.0000 54607.0743 0.02% - 0s 0 0 54612.6501 0 4 54619.0000 54612.6501 0.01% - 0s 0 0 54613.6667 0 1 54619.0000 54613.6667 0.01% - 0s Cutting planes: Implied bound: 37 Flow cover: 15 Explored 0 nodes (2113 simplex iterations) in 0.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.461900000000e+04, best bound 5.461366666667e+04, gap 0.0098%