Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:33:09 2012 Optimize a model with 1635 rows, 1620 columns and 5926 nonzeros Presolve removed 173 rows and 44 columns Presolve time: 0.01s Presolved: 1462 rows, 1576 columns, 5569 nonzeros Variable types: 1405 continuous, 171 integer (171 binary) Root relaxation: objective 6.324722e+04, 290 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63247.2250 0 16 - 63247.2250 - - 0s H 0 0 65948.000000 63247.2250 4.10% - 0s 0 0 63460.5622 0 27 65948.0000 63460.5622 3.77% - 0s 0 0 63618.4451 0 21 65948.0000 63618.4451 3.53% - 0s 0 0 63629.7203 0 31 65948.0000 63629.7203 3.52% - 0s 0 0 63630.8323 0 31 65948.0000 63630.8323 3.51% - 0s 0 0 63630.8572 0 31 65948.0000 63630.8572 3.51% - 0s 0 2 63818.4451 0 31 65948.0000 63818.4451 3.23% - 0s H 30 28 64931.000000 63879.1784 1.62% 4.1 0s H 31 26 64654.000000 63879.1784 1.20% 4.0 0s * 33 24 28 64608.000000 63879.1784 1.13% 4.1 0s * 98 64 25 64553.000000 63909.6513 1.00% 4.8 0s H 536 264 64544.000000 64019.6466 0.81% 5.3 0s * 537 258 20 64524.000000 64019.6466 0.78% 5.3 0s H 932 343 64400.000000 64033.7650 0.57% 6.4 0s * 937 323 37 64342.000000 64033.7650 0.48% 6.4 0s H 1015 303 64340.000000 64033.7650 0.48% 6.3 1s * 1546 229 32 64304.000000 64119.0499 0.29% 6.3 1s Cutting planes: Gomory: 29 Cover: 5 Flow cover: 19 Zero half: 1 Explored 2350 nodes (14893 simplex iterations) in 1.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.430400000000e+04, best bound 6.429774808077e+04, gap 0.0097%