current bounds on the number of colors: 0 -- 125 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:51:35 2012 Optimize a model with 54065 rows, 8620 columns and 169570 nonzeros Presolve time: 0.17s Presolved: 54065 rows, 8620 columns, 169570 nonzeros Variable types: 0 continuous, 8620 integer (8620 binary) Root relaxation: objective 0.000000e+00, 303 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 (588 simplex iterations) in 0.30 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 22:51:36 2012 Optimize a model with 27095 rows, 4745 columns and 84785 nonzeros Presolve time: 0.12s Presolved: 27095 rows, 4745 columns, 84785 nonzeros Variable types: 0 continuous, 4745 integer (4745 binary) Root relaxation: objective 0.000000e+00, 305 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 (649 simplex iterations) in 0.19 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 22:51:37 2012 Optimize a model with 13175 rows, 2745 columns and 41025 nonzeros Presolve time: 0.04s Presolved: 13175 rows, 2745 columns, 41025 nonzeros Variable types: 0 continuous, 2745 integer (2745 binary) Root relaxation: objective 0.000000e+00, 250 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 (642 simplex iterations) in 0.08 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 22:51:37 2012 Optimize a model with 6215 rows, 1745 columns and 19145 nonzeros Presolve time: 0.02s Presolved: 6215 rows, 1745 columns, 19145 nonzeros Variable types: 0 continuous, 1745 integer (1745 binary) Root relaxation: objective 0.000000e+00, 263 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 (1083 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 22:51:37 2012 Optimize a model with 2735 rows, 1245 columns and 8205 nonzeros Presolve time: 0.01s Presolved: 2735 rows, 1245 columns, 8205 nonzeros Variable types: 0 continuous, 1245 integer (1245 binary) Root relaxation: objective 0.000000e+00, 270 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 0 196 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5347 simplex iterations) in 0.66 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 22:51:38 2012 Optimize a model with 4475 rows, 1495 columns and 13675 nonzeros Presolve time: 0.01s Presolved: 4475 rows, 1495 columns, 13675 nonzeros Variable types: 0 continuous, 1495 integer (1495 binary) Root relaxation: objective 0.000000e+00, 272 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 0 148 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 329 - 0.00000 - - 1s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 2s 0 0 0.00000 0 327 - 0.00000 - - 3s 0 0 0.00000 0 325 - 0.00000 - - 4s 0 0 0.00000 0 328 - 0.00000 - - 4s 0 0 0.00000 0 354 - 0.00000 - - 5s 0 0 0.00000 0 354 - 0.00000 - - 5s 0 2 0.00000 0 354 - 0.00000 - - 6s 308 28 infeasible 20 - 0.00000 - 137 10s 857 28 0.00000 15 292 - 0.00000 - 124 15s 1005 61 0.00000 21 346 - 0.00000 - 129 21s 1007 62 0.00000 7 337 - 0.00000 - 129 25s 1011 65 0.00000 14 336 - 0.00000 - 128 32s 1014 67 0.00000 16 312 - 0.00000 - 128 35s 1058 80 0.00000 28 283 - 0.00000 - 178 40s 1260 50 infeasible 27 - 0.00000 - 192 45s 1447 61 0.00000 31 194 - 0.00000 - 206 50s 1635 57 infeasible 27 - 0.00000 - 214 55s 1820 62 infeasible 33 - 0.00000 - 223 60s 2023 65 infeasible 29 - 0.00000 - 227 65s 2218 64 infeasible 34 - 0.00000 - 232 70s 2404 64 0.00000 27 311 - 0.00000 - 236 75s 2599 47 infeasible 33 - 0.00000 - 240 80s 2784 54 infeasible 31 - 0.00000 - 243 85s 2975 55 infeasible 34 - 0.00000 - 246 90s 3165 59 infeasible 33 - 0.00000 - 248 95s 3379 55 infeasible 33 - 0.00000 - 248 100s 3571 63 infeasible 33 - 0.00000 - 251 105s 3763 59 infeasible 35 - 0.00000 - 252 110s 3969 73 0.00000 34 255 - 0.00000 - 253 115s 4162 62 infeasible 33 - 0.00000 - 255 120s 4373 69 0.00000 30 267 - 0.00000 - 255 125s 4573 59 0.00000 24 310 - 0.00000 - 257 130s 4757 65 0.00000 26 303 - 0.00000 - 258 135s 4947 75 0.00000 29 259 - 0.00000 - 259 140s 5130 70 0.00000 30 289 - 0.00000 - 260 145s 5314 62 infeasible 27 - 0.00000 - 261 150s 5493 67 infeasible 34 - 0.00000 - 263 155s 5673 63 infeasible 30 - 0.00000 - 264 160s 5864 54 infeasible 32 - 0.00000 - 264 165s 6062 58 0.00000 29 302 - 0.00000 - 265 170s 6244 60 0.00000 31 259 - 0.00000 - 266 175s 6433 53 infeasible 31 - 0.00000 - 267 180s 6599 47 infeasible 29 - 0.00000 - 268 185s 6759 49 infeasible 31 - 0.00000 - 269 190s 6922 38 infeasible 35 - 0.00000 - 271 195s 7107 43 0.00000 34 303 - 0.00000 - 271 200s 7288 36 infeasible 28 - 0.00000 - 272 205s 7474 32 infeasible 34 - 0.00000 - 272 210s 7652 28 infeasible 34 - 0.00000 - 273 215s 7837 25 infeasible 32 - 0.00000 - 274 220s 8022 28 0.00000 32 281 - 0.00000 - 274 225s 8218 16 infeasible 30 - 0.00000 - 274 230s 8414 30 infeasible 32 - 0.00000 - 274 235s 8599 37 infeasible 33 - 0.00000 - 274 240s 8795 41 infeasible 33 - 0.00000 - 274 245s 9010 54 0.00000 27 304 - 0.00000 - 274 250s 9200 46 infeasible 30 - 0.00000 - 274 255s 9397 53 infeasible 31 - 0.00000 - 274 260s 9577 47 0.00000 30 295 - 0.00000 - 275 265s 9781 45 0.00000 29 268 - 0.00000 - 275 270s 9973 27 infeasible 31 - 0.00000 - 275 275s 10152 40 0.00000 33 276 - 0.00000 - 276 280s 10344 32 infeasible 30 - 0.00000 - 276 285s 10515 21 0.00000 29 296 - 0.00000 - 276 290s 10696 24 infeasible 29 - 0.00000 - 276 295s Cutting planes: Clique: 8 Zero half: 20 Explored 10747 nodes (3002420 simplex iterations) in 296.33 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 22:56:34 2012 Optimize a model with 5345 rows, 1620 columns and 16410 nonzeros Presolve time: 0.01s Presolved: 5345 rows, 1620 columns, 16410 nonzeros Variable types: 0 continuous, 1620 integer (1620 binary) Root relaxation: objective 0.000000e+00, 277 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 0 250 - 0.00000 - - 0s Explored 0 nodes (613 simplex iterations) in 0.03 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