Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:40:39 2012 Optimize a model with 662 rows, 157 columns and 1324 nonzeros Presolve removed 155 rows and 2 columns Presolve time: 0.00s Presolved: 507 rows, 155 columns, 1117 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.408333e+01, 291 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.08333 0 134 48.00000 64.08333 33.5% - 0s 0 0 62.85472 0 151 48.00000 62.85472 30.9% - 0s H 0 0 49.0000000 62.85472 28.3% - 0s 0 0 61.78492 0 153 49.00000 61.78492 26.1% - 0s 0 0 61.03449 0 154 49.00000 61.03449 24.6% - 0s 0 0 60.49457 0 151 49.00000 60.49457 23.5% - 0s H 0 0 50.0000000 60.49457 21.0% - 0s 0 0 60.04439 0 153 50.00000 60.04439 20.1% - 0s 0 0 59.89739 0 153 50.00000 59.89739 19.8% - 0s 0 0 59.65229 0 151 50.00000 59.65229 19.3% - 0s 0 0 59.40475 0 150 50.00000 59.40475 18.8% - 0s H 0 0 51.0000000 59.40475 16.5% - 0s 0 0 59.29546 0 152 51.00000 59.29546 16.3% - 0s 0 0 59.10381 0 151 51.00000 59.10381 15.9% - 0s 0 0 59.02993 0 150 51.00000 59.02993 15.7% - 0s 0 0 58.98992 0 151 51.00000 58.98992 15.7% - 0s 0 0 58.98992 0 151 51.00000 58.98992 15.7% - 0s 0 2 58.98474 0 151 51.00000 58.98474 15.7% - 0s * 32 19 10 53.0000000 58.84139 11.0% 55.0 0s H 79 29 54.0000000 58.06896 7.54% 50.3 0s Cutting planes: Gomory: 1 Zero half: 124 Explored 510 nodes (23163 simplex iterations) in 0.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%