current bounds on the number of colors: 0 -- 124 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:09:05 2012 Optimize a model with 49042 rows, 8477 columns and 154442 nonzeros Presolve time: 0.16s Presolved: 49042 rows, 8477 columns, 154442 nonzeros Variable types: 0 continuous, 8477 integer (8477 binary) Root relaxation: objective 0.000000e+00, 323 iterations, 0.06 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 (590 simplex iterations) in 0.29 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 -- 62 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:09:06 2012 Optimize a model with 24583 rows, 4633 columns and 77221 nonzeros Presolve time: 0.11s Presolved: 24583 rows, 4633 columns, 77221 nonzeros Variable types: 0 continuous, 4633 integer (4633 binary) Root relaxation: objective 0.000000e+00, 300 iterations, 0.03 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 (567 simplex iterations) in 0.17 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 -- 31 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:09:07 2012 Optimize a model with 11959 rows, 2649 columns and 37365 nonzeros Presolve time: 0.04s Presolved: 11959 rows, 2649 columns, 37365 nonzeros Variable types: 0 continuous, 2649 integer (2649 binary) Root relaxation: objective 0.000000e+00, 254 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 (480 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:09:07 2012 Optimize a model with 5647 rows, 1657 columns and 17437 nonzeros Presolve time: 0.02s Presolved: 5647 rows, 1657 columns, 17437 nonzeros Variable types: 0 continuous, 1657 integer (1657 binary) Root relaxation: objective 0.000000e+00, 255 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 (1017 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 22:09:07 2012 Optimize a model with 2491 rows, 1161 columns and 7473 nonzeros Presolve time: 0.01s Presolved: 2491 rows, 1161 columns, 7473 nonzeros Variable types: 0 continuous, 1161 integer (1161 binary) Root relaxation: objective 0.000000e+00, 266 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 0 192 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (6536 simplex iterations) in 0.72 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 22:09:08 2012 Optimize a model with 4069 rows, 1409 columns and 12455 nonzeros Presolve time: 0.01s Presolved: 4069 rows, 1409 columns, 12455 nonzeros Variable types: 0 continuous, 1409 integer (1409 binary) Root relaxation: objective 0.000000e+00, 262 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 0 144 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 275 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 2s 0 0 0.00000 0 299 - 0.00000 - - 2s 0 0 0.00000 0 329 - 0.00000 - - 3s 0 0 0.00000 0 337 - 0.00000 - - 4s 0 0 0.00000 0 337 - 0.00000 - - 4s 0 2 0.00000 0 337 - 0.00000 - - 4s 13 13 0.00000 11 263 - 0.00000 - 304 5s 605 30 0.00000 19 251 - 0.00000 - 82.6 10s 610 33 0.00000 24 279 - 0.00000 - 81.9 15s 621 38 0.00000 16 263 - 0.00000 - 143 20s 814 28 infeasible 30 - 0.00000 - 160 25s 1123 65 infeasible 30 - 0.00000 - 174 30s 1456 88 infeasible 27 - 0.00000 - 183 35s 1791 105 infeasible 29 - 0.00000 - 187 40s 2125 117 infeasible 26 - 0.00000 - 189 45s 2499 123 0.00000 28 243 - 0.00000 - 190 50s 2849 127 infeasible 29 - 0.00000 - 193 55s 3182 122 0.00000 26 243 - 0.00000 - 195 60s 3497 129 infeasible 32 - 0.00000 - 198 65s 3854 142 infeasible 29 - 0.00000 - 199 70s 4179 131 0.00000 28 248 - 0.00000 - 200 75s 4520 106 infeasible 27 - 0.00000 - 202 80s 4855 113 0.00000 32 200 - 0.00000 - 203 85s 5202 100 0.00000 23 276 - 0.00000 - 203 90s 5537 103 0.00000 30 261 - 0.00000 - 204 95s 5875 105 infeasible 34 - 0.00000 - 204 100s 6220 110 infeasible 33 - 0.00000 - 205 105s 6524 108 0.00000 28 241 - 0.00000 - 206 110s 6853 95 infeasible 28 - 0.00000 - 207 115s 7188 94 infeasible 30 - 0.00000 - 207 120s 7518 114 infeasible 29 - 0.00000 - 207 125s 7808 130 infeasible 30 - 0.00000 - 209 130s 8122 126 infeasible 32 - 0.00000 - 209 135s 8456 120 0.00000 29 204 - 0.00000 - 210 140s 8774 108 infeasible 35 - 0.00000 - 210 145s 9095 103 infeasible 29 - 0.00000 - 211 150s 9387 97 0.00000 29 249 - 0.00000 - 212 155s 9754 106 infeasible 35 - 0.00000 - 211 160s 10109 101 infeasible 37 - 0.00000 - 211 165s 10436 104 infeasible 28 - 0.00000 - 212 170s 10740 94 0.00000 32 263 - 0.00000 - 212 175s 11060 100 0.00000 27 270 - 0.00000 - 212 180s 11337 97 0.00000 27 248 - 0.00000 - 213 185s 11609 107 0.00000 32 202 - 0.00000 - 214 190s 11899 105 infeasible 25 - 0.00000 - 215 195s 12210 106 0.00000 29 261 - 0.00000 - 215 200s 12530 116 0.00000 28 277 - 0.00000 - 215 205s 12877 129 infeasible 33 - 0.00000 - 215 210s 13182 108 0.00000 27 262 - 0.00000 - 216 215s 13475 153 infeasible 36 - 0.00000 - 216 220s 13770 156 0.00000 35 248 - 0.00000 - 217 225s 14067 175 infeasible 39 - 0.00000 - 217 230s 14381 167 infeasible 30 - 0.00000 - 217 235s 14679 163 infeasible 36 - 0.00000 - 218 240s 14969 177 infeasible 34 - 0.00000 - 218 245s 15273 171 infeasible 30 - 0.00000 - 219 250s 15589 159 infeasible 34 - 0.00000 - 219 255s 15888 150 infeasible 34 - 0.00000 - 219 260s 16184 160 infeasible 35 - 0.00000 - 220 265s 16474 172 0.00000 28 202 - 0.00000 - 220 270s 16775 159 infeasible 36 - 0.00000 - 220 275s 17078 156 0.00000 26 198 - 0.00000 - 220 280s 17379 163 0.00000 29 241 - 0.00000 - 220 285s 17674 168 0.00000 29 280 - 0.00000 - 221 290s 17946 162 0.00000 28 262 - 0.00000 - 221 295s Cutting planes: Clique: 6 Zero half: 12 Explored 18039 nodes (4017498 simplex iterations) in 296.53 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - current bounds on the number of colors: 5 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:05 2012 Optimize a model with 4858 rows, 1533 columns and 14946 nonzeros Presolve time: 0.01s Presolved: 4858 rows, 1533 columns, 14946 nonzeros Variable types: 0 continuous, 1533 integer (1533 binary) Root relaxation: objective 0.000000e+00, 264 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 0 176 - 0.00000 - - 0s Explored 0 nodes (773 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - optimal solution found: number of colors: 7