current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:19 2012 Optimize a model with 61541 rows, 15257 columns and 198645 nonzeros Presolve time: 0.19s Presolved: 61541 rows, 15257 columns, 198645 nonzeros Variable types: 0 continuous, 15257 integer (15257 binary) Root relaxation: objective 0.000000e+00, 616 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 (1005 simplex iterations) in 0.32 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 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:20 2012 Optimize a model with 30495 rows, 7904 columns and 98154 nonzeros Presolve time: 0.14s Presolved: 30495 rows, 7904 columns, 98154 nonzeros Variable types: 0 continuous, 7904 integer (7904 binary) Root relaxation: objective 0.000000e+00, 532 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 (909 simplex iterations) in 0.22 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:21 2012 Optimize a model with 15333 rows, 4313 columns and 49077 nonzeros Presolve time: 0.06s Presolved: 15333 rows, 4313 columns, 49077 nonzeros Variable types: 0 continuous, 4313 integer (4313 binary) Root relaxation: objective 0.000000e+00, 358 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 (668 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:21 2012 Optimize a model with 7391 rows, 2432 columns and 23370 nonzeros Presolve time: 0.02s Presolved: 7391 rows, 2432 columns, 23370 nonzeros Variable types: 0 continuous, 2432 integer (2432 binary) Root relaxation: objective 0.000000e+00, 372 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 (660 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:21 2012 Optimize a model with 3781 rows, 1577 columns and 11685 nonzeros Presolve time: 0.01s Presolved: 3781 rows, 1577 columns, 11685 nonzeros Variable types: 0 continuous, 1577 integer (1577 binary) Root relaxation: objective 0.000000e+00, 394 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 12 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2525 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:21 2012 Optimize a model with 1615 rows, 1064 columns and 4674 nonzeros Presolve removed 171 rows and 171 columns Presolve time: 0.00s Presolved: 1444 rows, 893 columns, 4332 nonzeros Variable types: 0 continuous, 893 integer (893 binary) Root relaxation: objective 0.000000e+00, 181 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 0 171 - 0.00000 - - 0s Explored 0 nodes (760 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:21 2012 Optimize a model with 2337 rows, 1235 columns and 7011 nonzeros Presolve time: 0.01s Presolved: 2337 rows, 1235 columns, 7011 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 364 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 0 338 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 428 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 24 Zero half: 708 Explored 0 nodes (6590 simplex iterations) in 0.68 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:35:22 2012 Optimize a model with 3059 rows, 1406 columns and 9348 nonzeros Presolve time: 0.01s Presolved: 3059 rows, 1406 columns, 9348 nonzeros Variable types: 0 continuous, 1406 integer (1406 binary) Root relaxation: objective 0.000000e+00, 396 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 0 342 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 363 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 276 - 0.00000 - - 1s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 276 - 0.00000 - - 1s 0 0 0.00000 0 268 - 0.00000 - - 2s 0 0 0.00000 0 246 - 0.00000 - - 2s 0 0 0.00000 0 248 - 0.00000 - - 2s 0 0 0.00000 0 246 - 0.00000 - - 2s 0 0 0.00000 0 234 - 0.00000 - - 3s 0 0 0.00000 0 232 - 0.00000 - - 3s 0 0 0.00000 0 236 - 0.00000 - - 3s 0 0 0.00000 0 236 - 0.00000 - - 3s 0 2 0.00000 0 236 - 0.00000 - - 3s 242 67 0.00000 22 272 - 0.00000 - 93.6 5s 609 164 0.00000 13 310 - 0.00000 - 91.1 10s 842 160 infeasible 28 - 0.00000 - 142 15s 1343 136 0.00000 26 317 - 0.00000 - 156 20s 1837 157 0.00000 26 288 - 0.00000 - 164 25s 2281 183 0.00000 26 321 - 0.00000 - 171 30s 2763 215 infeasible 27 - 0.00000 - 175 35s 3257 207 0.00000 25 337 - 0.00000 - 177 40s 3753 179 infeasible 32 - 0.00000 - 179 45s 4217 161 infeasible 25 - 0.00000 - 181 50s 4771 165 infeasible 25 - 0.00000 - 180 55s 5353 258 0.00000 25 292 - 0.00000 - 178 60s * 5824 0 26 0.0000000 0.00000 0.0% 178 64s Cutting planes: Clique: 1 Zero half: 19 Explored 5825 nodes (1079738 simplex iterations) in 64.48 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% optimal solution found: number of colors: 4