current bounds on the number of colors: 0 -- 112 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:09:14 2012 Optimize a model with 38808 rows, 6963 columns and 122360 nonzeros Presolve time: 0.15s Presolved: 38808 rows, 6963 columns, 122360 nonzeros Variable types: 0 continuous, 6963 integer (6963 binary) Root relaxation: objective 0.000000e+00, 263 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 (530 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 -- 56 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:09:15 2012 Optimize a model with 19460 rows, 3827 columns and 61180 nonzeros Presolve time: 0.08s Presolved: 19460 rows, 3827 columns, 61180 nonzeros Variable types: 0 continuous, 3827 integer (3827 binary) Root relaxation: objective 0.000000e+00, 266 iterations, 0.02 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 (504 simplex iterations) in 0.13 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 20:09:15 2012 Optimize a model with 9786 rows, 2259 columns and 30590 nonzeros Presolve time: 0.03s Presolved: 9786 rows, 2259 columns, 30590 nonzeros Variable types: 0 continuous, 2259 integer (2259 binary) Root relaxation: objective 0.000000e+00, 229 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 (483 simplex iterations) in 0.05 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 20:09:15 2012 Optimize a model with 4949 rows, 1475 columns and 15295 nonzeros Presolve time: 0.01s Presolved: 4949 rows, 1475 columns, 15295 nonzeros Variable types: 0 continuous, 1475 integer (1475 binary) Root relaxation: objective 0.000000e+00, 242 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 (1097 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 20:09:16 2012 Optimize a model with 2185 rows, 1027 columns and 6555 nonzeros Presolve time: 0.01s Presolved: 2185 rows, 1027 columns, 6555 nonzeros Variable types: 0 continuous, 1027 integer (1027 binary) Root relaxation: objective 0.000000e+00, 262 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 0 288 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4005 simplex iterations) in 0.40 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 20:09:16 2012 Optimize a model with 3567 rows, 1251 columns and 10925 nonzeros Presolve time: 0.01s Presolved: 3567 rows, 1251 columns, 10925 nonzeros Variable types: 0 continuous, 1251 integer (1251 binary) Root relaxation: objective 0.000000e+00, 247 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 235 - 0.00000 - - 1s 0 0 0.00000 0 197 - 0.00000 - - 2s 0 0 0.00000 0 281 - 0.00000 - - 2s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 0 0.00000 0 303 - 0.00000 - - 3s 0 0 0.00000 0 160 - 0.00000 - - 3s 0 0 0.00000 0 175 - 0.00000 - - 4s 0 0 0.00000 0 205 - 0.00000 - - 4s 0 0 0.00000 0 205 - 0.00000 - - 4s 0 2 0.00000 0 205 - 0.00000 - - 4s 2 3 0.00000 1 202 - 0.00000 - 966 5s 606 88 0.00000 13 281 - 0.00000 - 81.3 10s 611 92 0.00000 8 233 - 0.00000 - 80.7 15s 619 97 0.00000 17 189 - 0.00000 - 79.6 20s 707 120 0.00000 25 221 - 0.00000 - 144 25s 1138 92 0.00000 29 216 - 0.00000 - 156 30s 1542 106 infeasible 30 - 0.00000 - 166 35s 1913 101 infeasible 28 - 0.00000 - 175 40s * 1928 3 30 0.0000000 0.00000 0.0% 176 40s Cutting planes: Clique: 1 Zero half: 12 Explored 1929 nodes (377394 simplex iterations) in 40.24 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:09:56 2012 Optimize a model with 2876 rows, 1139 columns and 8740 nonzeros Presolve time: 0.01s Presolved: 2876 rows, 1139 columns, 8740 nonzeros Variable types: 0 continuous, 1139 integer (1139 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 0 160 - 0.00000 - - 0s 0 0 0.00000 0 285 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 335 - 0.00000 - - 2s 0 0 0.00000 0 336 - 0.00000 - - 3s 0 0 0.00000 0 338 - 0.00000 - - 3s 0 0 0.00000 0 332 - 0.00000 - - 4s 0 0 0.00000 0 334 - 0.00000 - - 4s 0 0 0.00000 0 334 - 0.00000 - - 5s 0 2 0.00000 0 334 - 0.00000 - - 5s Cutting planes: Clique: 15 Zero half: 17 Explored 9 nodes (29661 simplex iterations) in 5.97 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