Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:31 2012 Optimize a model with 285 rows, 270 columns and 891 nonzeros Presolve removed 18 rows and 11 columns Presolve time: 0.00s Presolved: 267 rows, 259 columns, 857 nonzeros Variable types: 173 continuous, 86 integer (86 binary) Root relaxation: objective 2.714033e+04, 148 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27140.3326 0 37 - 27140.3326 - - 0s H 0 0 42708.000000 27140.3326 36.5% - 0s H 0 0 42332.000000 27140.3326 35.9% - 0s 0 0 30921.8405 0 22 42332.0000 30921.8405 27.0% - 0s 0 0 31157.8149 0 19 42332.0000 31157.8149 26.4% - 0s 0 0 31243.6044 0 19 42332.0000 31243.6044 26.2% - 0s 0 0 31270.7556 0 18 42332.0000 31270.7556 26.1% - 0s 0 0 31273.6984 0 19 42332.0000 31273.6984 26.1% - 0s 0 2 31279.8783 0 19 42332.0000 31279.8783 26.1% - 0s * 38 28 32 31997.000000 31311.7828 2.14% 5.5 0s * 569 190 25 31942.000000 31621.8445 1.00% 6.6 3s 703 210 31887.0323 21 31 31942.0000 31648.2155 0.92% 6.6 5s * 764 205 42 31914.000000 31648.2155 0.83% 7.8 6s 1205 113 cutoff 20 31914.0000 31778.8249 0.42% 7.9 10s Cutting planes: Gomory: 4 Cover: 3 Implied bound: 1 Flow cover: 8 Flow path: 4 Explored 1356 nodes (10630 simplex iterations) in 11.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.191400000000e+04, best bound 3.191364778175e+04, gap 0.0011%