Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:31 2013 Optimize a model with 462 rows, 17682 columns and 35322 nonzeros Presolve time: 0.02s Presolved: 462 rows, 17682 columns, 35322 nonzeros Variable types: 17640 continuous, 42 integer (42 binary) Root relaxation: objective 5.076411e+04, 988 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50764.1124 0 10 - 50764.1124 - - 0s H 0 0 53048.000000 50764.1124 4.31% - 0s H 0 0 51762.000000 50764.1124 1.93% - 0s 0 0 51148.0408 0 7 51762.0000 51148.0408 1.19% - 0s 0 0 51233.0389 0 6 51762.0000 51233.0389 1.02% - 0s 0 0 51248.7720 0 5 51762.0000 51248.7720 0.99% - 0s 0 0 51253.2207 0 5 51762.0000 51253.2207 0.98% - 0s 0 0 51259.9962 0 5 51762.0000 51259.9962 0.97% - 0s 0 0 51264.1128 0 7 51762.0000 51264.1128 0.96% - 0s H 0 0 51465.000000 51264.1128 0.39% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 10 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 7 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 4 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 7 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51266.9723 0 5 51465.0000 51266.9723 0.38% - 0s 0 0 51273.2512 0 5 51465.0000 51273.2512 0.37% - 0s 0 0 51308.5053 0 5 51465.0000 51308.5053 0.30% - 0s 0 0 51340.6591 0 4 51465.0000 51340.6591 0.24% - 0s 0 2 51342.1463 0 4 51465.0000 51342.1463 0.24% - 0s * 13 4 9 51415.000000 51342.1463 0.14% 16.2 0s Cutting planes: Implied bound: 109 Flow cover: 10 Explored 22 nodes (2698 simplex iterations) in 0.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.141500000000e+04, best bound 5.141500000000e+04, gap 0.0%