Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:52:33 2013 Optimize a model with 715 rows, 42315 columns and 84565 nonzeros Presolve time: 0.06s Presolved: 715 rows, 42315 columns, 84565 nonzeros Variable types: 42250 continuous, 65 integer (65 binary) Root relaxation: objective 7.272698e+04, 1660 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72726.9785 0 6 - 72726.9785 - - 0s H 0 0 75675.000000 72726.9785 3.90% - 0s 0 0 73063.3466 0 5 75675.0000 73063.3466 3.45% - 0s 0 0 73097.6305 0 5 75675.0000 73097.6305 3.41% - 0s H 0 0 75535.000000 73097.6305 3.23% - 0s 0 0 73126.8562 0 5 75535.0000 73126.8562 3.19% - 0s H 0 0 75048.000000 73126.8562 2.56% - 0s 0 0 73131.8282 0 5 75048.0000 73131.8282 2.55% - 0s H 0 0 74855.000000 73131.8282 2.30% - 0s 0 0 73136.5021 0 4 74855.0000 73136.5021 2.30% - 0s 0 0 73136.5021 0 4 74855.0000 73136.5021 2.30% - 0s 0 0 73136.5021 0 4 74855.0000 73136.5021 2.30% - 0s H 0 0 74533.000000 73136.5021 1.87% - 1s 0 2 73151.3604 0 4 74533.0000 73151.3604 1.85% - 1s H 4 4 73900.882144 73224.8998 0.91% 46.5 1s * 11 6 11 73352.000000 73224.8998 0.17% 38.8 1s Cutting planes: Implied bound: 115 Flow cover: 5 Explored 20 nodes (2767 simplex iterations) in 1.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.335200000000e+04, best bound 7.335200000000e+04, gap 0.0%