Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:13:48 2013 Optimize a model with 27612 rows, 27092 columns and 108212 nonzeros Presolve removed 2033 rows and 0 columns Presolve time: 0.15s Presolved: 25579 rows, 27092 columns, 104146 nonzeros Variable types: 27040 continuous, 52 integer (52 binary) Root relaxation: objective 5.874872e+04, 4291 iterations, 0.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58748.7228 0 3 - 58748.7228 - - 0s H 0 0 59466.000000 58748.7228 1.21% - 0s H 0 0 58937.000000 58748.7228 0.32% - 0s 0 0 58750.1126 0 4 58937.0000 58750.1126 0.32% - 0s 0 0 58750.1402 0 4 58937.0000 58750.1402 0.32% - 1s 0 0 58750.1402 0 4 58937.0000 58750.1402 0.32% - 1s 0 0 58801.7059 0 1 58937.0000 58801.7059 0.23% - 1s H 0 0 58903.000000 58801.7059 0.17% - 1s 0 0 58801.7059 0 1 58903.0000 58801.7059 0.17% - 1s 0 0 58803.7551 0 2 58903.0000 58803.7551 0.17% - 1s 0 2 58804.6426 0 2 58903.0000 58804.6426 0.17% - 2s * 1 1 1 58808.000000 58808.0000 0.0% 37.0 2s Cutting planes: Gomory: 1 Flow cover: 2 Explored 2 nodes (5779 simplex iterations) in 2.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.880800000000e+04, best bound 5.880800000000e+04, gap 0.0%