current bounds on the number of colors: 0 -- 115 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:30 2012 Optimize a model with 38704 rows, 7232 columns and 122322 nonzeros Presolve time: 0.15s Presolved: 38704 rows, 7232 columns, 122322 nonzeros Variable types: 0 continuous, 7232 integer (7232 binary) Root relaxation: objective 0.000000e+00, 293 iterations, 0.04 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 (556 simplex iterations) in 0.24 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 -- 57 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:31 2012 Optimize a model with 19071 rows, 3897 columns and 60088 nonzeros Presolve time: 0.08s Presolved: 19071 rows, 3897 columns, 60088 nonzeros Variable types: 0 continuous, 3897 integer (3897 binary) Root relaxation: objective 0.000000e+00, 283 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 (518 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:31 2012 Optimize a model with 9593 rows, 2287 columns and 30044 nonzeros Presolve time: 0.03s Presolved: 9593 rows, 2287 columns, 30044 nonzeros Variable types: 0 continuous, 2287 integer (2287 binary) Root relaxation: objective 0.000000e+00, 231 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 (572 simplex iterations) in 0.06 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:31 2012 Optimize a model with 4854 rows, 1482 columns and 15022 nonzeros Presolve time: 0.01s Presolved: 4854 rows, 1482 columns, 15022 nonzeros Variable types: 0 continuous, 1482 integer (1482 binary) Root relaxation: objective 0.000000e+00, 235 iterations, 0.00 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 (1181 simplex iterations) in 0.06 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:32 2012 Optimize a model with 2146 rows, 1022 columns and 6438 nonzeros Presolve time: 0.01s Presolved: 2146 rows, 1022 columns, 6438 nonzeros Variable types: 0 continuous, 1022 integer (1022 binary) Root relaxation: objective 0.000000e+00, 265 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4604 simplex iterations) in 0.44 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:32 2012 Optimize a model with 3500 rows, 1252 columns and 10730 nonzeros Presolve time: 0.01s Presolved: 3500 rows, 1252 columns, 10730 nonzeros Variable types: 0 continuous, 1252 integer (1252 binary) Root relaxation: objective 0.000000e+00, 236 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 0 226 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 306 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 2s 0 2 0.00000 0 311 - 0.00000 - - 2s 777 53 0.00000 19 169 - 0.00000 - 67.4 5s 910 78 0.00000 18 216 - 0.00000 - 66.1 10s * 1148 2 33 0.0000000 0.00000 0.0% 103 13s Cutting planes: Gomory: 1 Clique: 1 Zero half: 10 Explored 1149 nodes (136413 simplex iterations) in 13.89 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:20:46 2012 Optimize a model with 2823 rows, 1137 columns and 8584 nonzeros Presolve time: 0.01s Presolved: 2823 rows, 1137 columns, 8584 nonzeros Variable types: 0 continuous, 1137 integer (1137 binary) Root relaxation: objective 0.000000e+00, 244 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 0 180 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 0 0.00000 0 325 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 2s 0 0 0.00000 0 330 - 0.00000 - - 2s 0 0 0.00000 0 327 - 0.00000 - - 3s 0 0 0.00000 0 325 - 0.00000 - - 3s 0 0 0.00000 0 337 - 0.00000 - - 4s 0 0 0.00000 0 322 - 0.00000 - - 4s 0 0 0.00000 0 324 - 0.00000 - - 5s 0 0 0.00000 0 323 - 0.00000 - - 5s 0 2 0.00000 0 320 - 0.00000 - - 5s Cutting planes: Clique: 19 Zero half: 14 Explored 26 nodes (36772 simplex iterations) in 6.43 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5