Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:34 2013 Optimize a model with 19888 rows, 19448 columns and 77528 nonzeros Presolve removed 44 rows and 0 columns Presolve time: 0.08s Presolved: 19844 rows, 19448 columns, 77484 nonzeros Variable types: 19404 continuous, 44 integer (44 binary) Root relaxation: objective 3.548608e+04, 2064 iterations, 0.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35486.0764 0 36 - 35486.0764 - - 0s H 0 0 43416.000000 35486.0764 18.3% - 0s 0 0 39524.9037 0 6 43416.0000 39524.9037 8.96% - 1s H 0 0 43321.339892 39524.9037 8.76% - 1s H 0 0 42079.000000 39524.9037 6.07% - 1s H 0 0 40124.000000 39524.9037 1.49% - 1s 0 0 39878.7561 0 4 40124.0000 39878.7561 0.61% - 1s H 0 0 39930.000000 39878.7561 0.13% - 1s 0 0 39888.0074 0 3 39930.0000 39888.0074 0.11% - 1s 0 2 39888.6488 0 3 39930.0000 39888.6488 0.10% - 2s * 5 1 4 39927.000000 39919.0000 0.02% 26.0 2s Cutting planes: Gomory: 1 Implied bound: 33 Explored 7 nodes (3408 simplex iterations) in 2.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.992700000000e+04, best bound 3.992700000000e+04, gap 0.0%