Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:02:15 2013 Optimize a model with 135 rows, 100 columns and 360 nonzeros Presolve removed 45 rows and 45 columns Presolve time: 0.00s Presolved: 90 rows, 55 columns, 270 nonzeros Variable types: 10 continuous, 45 integer (45 binary) Found heuristic solution: objective 1924.0000000 Root relaxation: objective 5.600000e+02, 28 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 560.00000 0 21 1924.00000 560.00000 70.9% - 0s H 0 0 1833.0000000 560.00000 69.4% - 0s 0 0 726.09629 0 13 1833.00000 726.09629 60.4% - 0s 0 0 747.34655 0 18 1833.00000 747.34655 59.2% - 0s 0 0 748.46756 0 19 1833.00000 748.46756 59.2% - 0s 0 0 748.46756 0 19 1833.00000 748.46756 59.2% - 0s H 0 0 1459.0000000 748.46756 48.7% - 0s 0 2 749.16401 0 19 1459.00000 749.16401 48.7% - 0s H 27 27 1439.0000000 762.08076 47.0% 5.6 0s * 28 28 18 1428.0000000 762.08076 46.6% 5.6 0s * 126 98 18 1394.0000000 874.44682 37.3% 4.3 0s * 161 109 14 1341.0000000 875.69569 34.7% 4.1 0s * 1106 274 30 1339.0000000 949.00000 29.1% 5.2 0s * 2957 368 27 1335.0000000 1091.70588 18.2% 4.5 0s H 4268 338 1332.0000000 1158.30675 13.0% 4.1 0s H 4379 319 1323.0000000 1169.30675 11.6% 4.1 0s Cutting planes: Gomory: 24 Implied bound: 9 MIR: 42 Explored 5442 nodes (21073 simplex iterations) in 0.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.323000000000e+03, best bound 1.323000000000e+03, gap 0.0%