Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:37:03 2013 Optimize a model with 671 rows, 37271 columns and 74481 nonzeros Presolve time: 0.05s Presolved: 671 rows, 37271 columns, 74481 nonzeros Variable types: 37210 continuous, 61 integer (61 binary) Root relaxation: objective 6.263471e+04, 1572 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62634.7103 0 9 - 62634.7103 - - 0s H 0 0 67755.000000 62634.7103 7.56% - 0s 0 0 62905.3477 0 6 67755.0000 62905.3477 7.16% - 0s H 0 0 66181.000000 62905.3477 4.95% - 0s 0 0 62954.7596 0 3 66181.0000 62954.7596 4.87% - 0s 0 0 62961.3227 0 5 66181.0000 62961.3227 4.86% - 0s H 0 0 66153.000000 62961.3227 4.82% - 0s 0 0 62964.0482 0 6 66153.0000 62964.0482 4.82% - 0s 0 0 62969.1666 0 5 66153.0000 62969.1666 4.81% - 0s 0 0 62969.6576 0 6 66153.0000 62969.6576 4.81% - 0s 0 0 62971.1100 0 5 66153.0000 62971.1100 4.81% - 0s H 0 0 64579.000000 62971.1100 2.49% - 0s 0 0 62971.2461 0 4 64579.0000 62971.2461 2.49% - 0s 0 0 62971.4232 0 3 64579.0000 62971.4232 2.49% - 0s 0 0 62971.4232 0 3 64579.0000 62971.4232 2.49% - 0s 0 0 62971.4232 0 3 64579.0000 62971.4232 2.49% - 0s 0 0 62971.4232 0 3 64579.0000 62971.4232 2.49% - 1s 0 2 62989.8197 0 3 64579.0000 62989.8197 2.46% - 1s H 4 4 63266.129187 63162.9125 0.16% 97.5 1s H 6 2 63251.707692 63162.9125 0.14% 81.2 1s H 7 2 63190.000000 63162.9125 0.04% 70.1 1s * 8 2 7 63181.000000 63162.9125 0.03% 62.5 1s Cutting planes: Implied bound: 75 Flow cover: 9 Explored 10 nodes (2729 simplex iterations) in 1.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.318100000000e+04, best bound 6.317684538165e+04, gap 0.0066%