Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:58 2013 Optimize a model with 231 rows, 4431 columns and 8841 nonzeros Presolve time: 0.00s Presolved: 231 rows, 4431 columns, 8841 nonzeros Variable types: 4410 continuous, 21 integer (21 binary) Root relaxation: objective 1.775679e+04, 159 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17756.7894 0 9 - 17756.7894 - - 0s H 0 0 18091.000000 17756.7894 1.85% - 0s 0 0 17975.4335 0 5 18091.0000 17975.4335 0.64% - 0s 0 0 17993.9214 0 5 18091.0000 17993.9214 0.54% - 0s 0 0 17997.4150 0 4 18091.0000 17997.4150 0.52% - 0s H 0 0 18016.000000 17997.4150 0.10% - 0s 0 0 17997.7717 0 6 18016.0000 17997.7717 0.10% - 0s 0 0 17998.4152 0 5 18016.0000 17998.4152 0.10% - 0s 0 0 17998.4887 0 6 18016.0000 17998.4887 0.10% - 0s 0 0 18000.1615 0 2 18016.0000 18000.1615 0.09% - 0s 0 2 18009.8857 0 2 18016.0000 18009.8857 0.03% - 0s Cutting planes: Implied bound: 42 Flow cover: 4 Explored 3 nodes (270 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.801600000000e+04, best bound 1.801482142857e+04, gap 0.0065%