Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:18:23 2012 Optimize a model with 583 rows, 527 columns and 1982 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 583 rows, 512 columns, 1967 nonzeros Variable types: 0 continuous, 512 integer (511 binary) Found heuristic solution: objective 115.0000000 Root relaxation: objective 0.000000e+00, 277 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 217 115.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s 0 0 0.42598 0 220 70.00000 0.42598 99.4% - 0s H 0 0 64.0000000 0.42598 99.3% - 0s 0 0 0.71243 0 223 64.00000 0.71243 98.9% - 0s H 0 0 51.0000000 0.71243 98.6% - 0s 0 0 0.71369 0 221 51.00000 0.71369 98.6% - 0s H 0 0 49.0000000 0.71369 98.5% - 0s 0 0 0.71369 0 221 49.00000 0.71369 98.5% - 0s 0 2 0.71381 0 221 49.00000 0.71381 98.5% - 0s H 27 27 44.0000000 1.00000 97.7% 43.5 0s H 54 54 40.0000000 1.00000 97.5% 34.1 0s * 56 39 33 21.0000000 1.00000 95.2% 33.0 0s H 848 289 20.0000000 8.76033 56.2% 32.7 1s 2764 128 18.84940 23 201 20.00000 15.45070 22.7% 32.2 5s Explored 3060 nodes (97265 simplex iterations) in 5.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%