Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:51:22 2013 Optimize a model with 640 rows, 24700 columns and 248380 nonzeros Presolve removed 20 rows and 500 columns Presolve time: 0.43s Presolved: 620 rows, 24200 columns, 228380 nonzeros Variable types: 24020 continuous, 180 integer (180 binary) Root relaxation: objective 4.370285e+04, 654 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 14 - 43702.8549 - - 0s 0 0 43703.4467 0 14 - 43703.4467 - - 0s 0 0 43703.4760 0 14 - 43703.4760 - - 0s 0 0 43703.4889 0 14 - 43703.4889 - - 0s 0 0 43703.4889 0 14 - 43703.4889 - - 1s 0 0 43703.5065 0 14 - 43703.5065 - - 1s 0 0 43703.5065 0 14 - 43703.5065 - - 1s 0 0 43703.5105 0 14 - 43703.5105 - - 1s 0 0 43703.5105 0 14 - 43703.5105 - - 1s H 0 0 46185.261432 43703.5105 5.37% - 3s 0 2 43709.4612 0 14 46185.2614 43709.4612 5.36% - 3s * 31 28 30 44081.181188 43850.5599 0.52% 12.4 3s * 62 39 20 44074.930875 43875.9661 0.45% 11.0 4s * 91 16 19 43935.310542 43889.3496 0.10% 9.6 4s * 158 40 43 43919.431645 43900.8213 0.04% 6.9 4s * 178 2 14 43900.868871 43900.8657 0.00% 6.4 4s Cutting planes: Flow cover: 9 Explored 179 nodes (2895 simplex iterations) in 4.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390086887068e+04, best bound 4.390086573001e+04, gap 0.0000%