current bounds on the number of colors: 0 -- 117 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:37:59 2012 Optimize a model with 43791 rows, 7539 columns and 137808 nonzeros Presolve time: 0.16s Presolved: 43791 rows, 7539 columns, 137808 nonzeros Variable types: 0 continuous, 7539 integer (7539 binary) Root relaxation: objective 0.000000e+00, 282 iterations, 0.05 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 0.27 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 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:38:00 2012 Optimize a model with 21954 rows, 4146 columns and 68904 nonzeros Presolve time: 0.09s Presolved: 21954 rows, 4146 columns, 68904 nonzeros Variable types: 0 continuous, 4146 integer (4146 binary) Root relaxation: objective 0.000000e+00, 281 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 (544 simplex iterations) in 0.14 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 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:38:00 2012 Optimize a model with 10659 rows, 2391 columns and 33264 nonzeros Presolve time: 0.03s Presolved: 10659 rows, 2391 columns, 33264 nonzeros Variable types: 0 continuous, 2391 integer (2391 binary) Root relaxation: objective 0.000000e+00, 235 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 (479 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 20:38:00 2012 Optimize a model with 5388 rows, 1572 columns and 16632 nonzeros Presolve time: 0.01s Presolved: 5388 rows, 1572 columns, 16632 nonzeros Variable types: 0 continuous, 1572 integer (1572 binary) Root relaxation: objective 0.000000e+00, 241 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 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1886 simplex iterations) in 0.10 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 20:38:00 2012 Optimize a model with 2376 rows, 1104 columns and 7128 nonzeros Presolve time: 0.01s Presolved: 2376 rows, 1104 columns, 7128 nonzeros Variable types: 0 continuous, 1104 integer (1104 binary) Root relaxation: objective 0.000000e+00, 251 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 0 234 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3807 simplex iterations) in 0.46 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 20:38:01 2012 Optimize a model with 3882 rows, 1338 columns and 11880 nonzeros Presolve time: 0.01s Presolved: 3882 rows, 1338 columns, 11880 nonzeros Variable types: 0 continuous, 1338 integer (1338 binary) Root relaxation: objective 0.000000e+00, 246 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 0 222 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 1s 0 0 0.00000 0 287 - 0.00000 - - 1s 0 0 0.00000 0 310 - 0.00000 - - 2s 0 0 0.00000 0 305 - 0.00000 - - 2s 0 0 0.00000 0 315 - 0.00000 - - 3s 0 0 0.00000 0 315 - 0.00000 - - 3s 0 2 0.00000 0 315 - 0.00000 - - 4s 142 41 0.00000 14 184 - 0.00000 - 115 5s 904 48 0.00000 22 325 - 0.00000 - 89.3 10s 909 51 0.00000 22 282 - 0.00000 - 88.8 16s 914 55 0.00000 5 225 - 0.00000 - 88.3 21s 921 59 0.00000 12 241 - 0.00000 - 87.6 25s 1067 69 0.00000 32 285 - 0.00000 - 151 30s 1406 166 0.00000 34 246 - 0.00000 - 161 35s 1710 184 0.00000 37 259 - 0.00000 - 172 40s 1989 203 0.00000 30 204 - 0.00000 - 181 45s 2302 212 infeasible 37 - 0.00000 - 185 50s 2606 248 infeasible 39 - 0.00000 - 189 55s 2923 269 0.00000 36 246 - 0.00000 - 192 60s 3233 249 infeasible 39 - 0.00000 - 193 65s 3546 292 infeasible 35 - 0.00000 - 195 70s 3840 316 infeasible 29 - 0.00000 - 197 75s 4119 319 infeasible 32 - 0.00000 - 199 80s 4404 304 0.00000 40 265 - 0.00000 - 202 85s 4690 298 infeasible 37 - 0.00000 - 204 90s 5021 321 0.00000 40 212 - 0.00000 - 204 95s 5349 319 infeasible 35 - 0.00000 - 204 100s 5654 286 infeasible 35 - 0.00000 - 205 105s 5945 281 infeasible 35 - 0.00000 - 206 110s 6225 253 infeasible 33 - 0.00000 - 208 115s 6491 245 0.00000 35 247 - 0.00000 - 209 120s 6775 227 0.00000 36 263 - 0.00000 - 210 125s 7071 239 0.00000 33 253 - 0.00000 - 211 130s 7386 244 0.00000 35 254 - 0.00000 - 211 135s 7692 236 infeasible 35 - 0.00000 - 211 140s 7957 219 0.00000 28 228 - 0.00000 - 212 145s 8241 205 infeasible 28 - 0.00000 - 213 150s 8559 211 infeasible 32 - 0.00000 - 213 155s 8851 219 infeasible 36 - 0.00000 - 213 160s 9137 207 infeasible 37 - 0.00000 - 214 165s 9421 213 infeasible 30 - 0.00000 - 214 170s 9730 214 0.00000 38 258 - 0.00000 - 214 175s 10014 192 infeasible 30 - 0.00000 - 215 180s 10306 190 0.00000 39 237 - 0.00000 - 215 185s 10587 187 infeasible 36 - 0.00000 - 216 190s 10925 185 infeasible 41 - 0.00000 - 215 195s 11253 191 infeasible 26 - 0.00000 - 215 200s 11573 187 infeasible 26 - 0.00000 - 215 205s 11881 181 infeasible 41 - 0.00000 - 215 210s 12164 172 0.00000 30 239 - 0.00000 - 216 215s 12431 157 infeasible 36 - 0.00000 - 216 220s 12735 157 infeasible 36 - 0.00000 - 216 225s 12970 152 infeasible 28 - 0.00000 - 217 230s 13208 150 0.00000 30 259 - 0.00000 - 218 235s 13503 141 infeasible 38 - 0.00000 - 218 240s 13795 125 infeasible 32 - 0.00000 - 218 245s 14113 121 0.00000 33 247 - 0.00000 - 218 250s 14394 112 infeasible 30 - 0.00000 - 218 255s 14656 110 infeasible 36 - 0.00000 - 219 260s 14923 105 0.00000 38 245 - 0.00000 - 219 265s 15254 132 infeasible 37 - 0.00000 - 219 270s 15592 138 infeasible 35 - 0.00000 - 218 275s 15961 139 0.00000 34 248 - 0.00000 - 218 280s 16287 157 infeasible 28 - 0.00000 - 217 285s 16596 146 infeasible 30 - 0.00000 - 217 290s 16937 139 0.00000 32 201 - 0.00000 - 217 295s Cutting planes: Clique: 6 Zero half: 21 Explored 17048 nodes (3721688 simplex iterations) in 297.02 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 20:42:58 2012 Optimize a model with 4635 rows, 1455 columns and 14256 nonzeros Presolve time: 0.01s Presolved: 4635 rows, 1455 columns, 14256 nonzeros Variable types: 0 continuous, 1455 integer (1455 binary) Root relaxation: objective 0.000000e+00, 254 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 0 234 - 0.00000 - - 0s Explored 0 nodes (799 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