Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:54 2013 Optimize a model with 660 rows, 36060 columns and 72060 nonzeros Presolve time: 0.05s Presolved: 660 rows, 36060 columns, 72060 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 5.939783e+04, 1280 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59397.8292 0 8 - 59397.8292 - - 0s H 0 0 62053.000000 59397.8292 4.28% - 0s 0 0 59592.7458 0 4 62053.0000 59592.7458 3.96% - 0s 0 0 59628.3426 0 3 62053.0000 59628.3426 3.91% - 0s H 0 0 61583.565959 59628.3426 3.17% - 0s H 0 0 61037.000000 59628.3426 2.31% - 0s 0 0 59633.9477 0 3 61037.0000 59633.9477 2.30% - 0s H 0 0 61020.000000 59633.9477 2.27% - 0s 0 0 59634.1703 0 5 61020.0000 59634.1703 2.27% - 0s H 0 0 60985.000000 59634.1703 2.22% - 0s 0 0 59635.0340 0 4 60985.0000 59635.0340 2.21% - 0s 0 0 59635.2952 0 4 60985.0000 59635.2952 2.21% - 0s 0 0 59635.8915 0 3 60985.0000 59635.8915 2.21% - 0s 0 0 59636.1699 0 4 60985.0000 59636.1699 2.21% - 0s 0 0 59636.2586 0 3 60985.0000 59636.2586 2.21% - 0s 0 0 59636.2586 0 3 60985.0000 59636.2586 2.21% - 0s 0 2 59636.5601 0 3 60985.0000 59636.5601 2.21% - 0s H 4 4 60856.157738 59730.4084 1.85% 32.2 1s H 5 4 60003.943396 59730.4084 0.46% 37.2 1s H 8 6 59875.000000 59730.4084 0.24% 37.2 1s H 10 7 59813.388889 59730.4084 0.14% 31.7 1s * 12 8 10 59802.000000 59730.4084 0.12% 29.8 1s H 17 4 59774.034625 59732.6842 0.07% 25.3 1s H 19 2 59769.041379 59732.6842 0.06% 24.4 1s * 20 2 7 59757.000000 59732.6842 0.04% 24.2 1s Cutting planes: Implied bound: 78 Flow cover: 4 Explored 23 nodes (2101 simplex iterations) in 1.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.975700000000e+04, best bound 5.975700000000e+04, gap 0.0%