current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:05 2012 Optimize a model with 15425 rows, 1865 columns and 47375 nonzeros Presolve time: 0.06s Presolved: 15425 rows, 1865 columns, 47375 nonzeros Variable types: 0 continuous, 1865 integer (1865 binary) Root relaxation: objective 0.000000e+00, 123 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (415 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:05 2012 Optimize a model with 7430 rows, 1215 columns and 22740 nonzeros Presolve time: 0.02s Presolved: 7430 rows, 1215 columns, 22740 nonzeros Variable types: 0 continuous, 1215 integer (1215 binary) Root relaxation: objective 0.000000e+00, 112 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (789 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:05 2012 Optimize a model with 3740 rows, 915 columns and 11370 nonzeros Presolve time: 0.01s Presolved: 3740 rows, 915 columns, 11370 nonzeros Variable types: 0 continuous, 915 integer (915 binary) Root relaxation: objective 0.000000e+00, 102 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 60 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2825 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:06 2012 Optimize a model with 5585 rows, 1065 columns and 17055 nonzeros Presolve time: 0.02s Presolved: 5585 rows, 1065 columns, 17055 nonzeros Variable types: 0 continuous, 1065 integer (1065 binary) Root relaxation: objective 0.000000e+00, 110 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 221 - 0.00000 - - 0s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 197 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 2s 0 0 0.00000 0 156 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 3s 0 0 0.00000 0 178 - 0.00000 - - 3s 0 0 0.00000 0 174 - 0.00000 - - 4s 0 0 0.00000 0 155 - 0.00000 - - 5s 0 0 0.00000 0 166 - 0.00000 - - 5s 0 0 0.00000 0 166 - 0.00000 - - 5s 0 2 0.00000 0 166 - 0.00000 - - 6s 470 18 0.00000 12 114 - 0.00000 - 104 10s * 637 2 16 0.0000000 0.00000 0.0% 98.7 10s Cutting planes: Clique: 102 Zero half: 45 Explored 638 nodes (102181 simplex iterations) in 10.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:17 2012 Optimize a model with 4355 rows, 965 columns and 13265 nonzeros Presolve time: 0.01s Presolved: 4355 rows, 965 columns, 13265 nonzeros Variable types: 0 continuous, 965 integer (965 binary) Root relaxation: objective 0.000000e+00, 100 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 60 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 0 0.00000 0 293 - 0.00000 - - 4s 0 0 0.00000 0 306 - 0.00000 - - 5s 0 0 0.00000 0 306 - 0.00000 - - 6s 0 2 0.00000 0 306 - 0.00000 - - 6s Cutting planes: Gomory: 1 Clique: 63 Zero half: 47 Explored 3 nodes (30458 simplex iterations) in 6.62 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:24 2012 Optimize a model with 4970 rows, 1015 columns and 15160 nonzeros Presolve time: 0.01s Presolved: 4970 rows, 1015 columns, 15160 nonzeros Variable types: 0 continuous, 1015 integer (1015 binary) Root relaxation: objective 0.000000e+00, 100 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 98 - 0.00000 - - 0s 0 0 0.00000 0 57 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 214 - 0.00000 - - 2s 0 0 0.00000 0 215 - 0.00000 - - 2s 0 0 0.00000 0 215 - 0.00000 - - 3s 0 2 0.00000 0 215 - 0.00000 - - 3s Cutting planes: Clique: 87 Zero half: 3 Explored 49 nodes (33348 simplex iterations) in 4.93 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9