current bounds on the number of colors: 0 -- 166 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:04:56 2012 Optimize a model with 57602 rows, 14470 columns and 186086 nonzeros Presolve time: 0.17s Presolved: 57602 rows, 14470 columns, 186086 nonzeros Variable types: 0 continuous, 14470 integer (14470 binary) Root relaxation: objective 0.000000e+00, 605 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 (946 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:04:57 2012 Optimize a model with 28538 rows, 7498 columns and 91922 nonzeros Presolve time: 0.14s Presolved: 28538 rows, 7498 columns, 91922 nonzeros Variable types: 0 continuous, 7498 integer (7498 binary) Root relaxation: objective 0.000000e+00, 531 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 (873 simplex iterations) in 0.20 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:04:57 2012 Optimize a model with 14006 rows, 4012 columns and 44840 nonzeros Presolve time: 0.05s Presolved: 14006 rows, 4012 columns, 44840 nonzeros Variable types: 0 continuous, 4012 integer (4012 binary) Root relaxation: objective 0.000000e+00, 335 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 (603 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:04:58 2012 Optimize a model with 7086 rows, 2352 columns and 22420 nonzeros Presolve time: 0.02s Presolved: 7086 rows, 2352 columns, 22420 nonzeros Variable types: 0 continuous, 2352 integer (2352 binary) Root relaxation: objective 0.000000e+00, 350 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 (645 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 20:04:58 2012 Optimize a model with 3626 rows, 1522 columns and 11210 nonzeros Presolve time: 0.01s Presolved: 3626 rows, 1522 columns, 11210 nonzeros Variable types: 0 continuous, 1522 integer (1522 binary) Root relaxation: objective 0.000000e+00, 365 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 (1732 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:04:58 2012 Optimize a model with 1550 rows, 1024 columns and 4484 nonzeros Presolve removed 166 rows and 166 columns Presolve time: 0.00s Presolved: 1384 rows, 858 columns, 4152 nonzeros Variable types: 0 continuous, 858 integer (858 binary) Root relaxation: objective 0.000000e+00, 174 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 0 166 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (701 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 20:04:58 2012 Optimize a model with 2242 rows, 1190 columns and 6726 nonzeros Presolve time: 0.01s Presolved: 2242 rows, 1190 columns, 6726 nonzeros Variable types: 0 continuous, 1190 integer (1190 binary) Root relaxation: objective 0.000000e+00, 367 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 410 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 10 Clique: 1 Zero half: 348 Explored 0 nodes (6899 simplex iterations) in 0.69 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 20:04:59 2012 Optimize a model with 2934 rows, 1356 columns and 8968 nonzeros Presolve time: 0.01s Presolved: 2934 rows, 1356 columns, 8968 nonzeros Variable types: 0 continuous, 1356 integer (1356 binary) Root relaxation: objective 0.000000e+00, 379 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 0 328 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 243 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 237 - 0.00000 - - 2s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 238 - 0.00000 - - 2s 0 0 0.00000 0 238 - 0.00000 - - 2s 0 2 0.00000 0 238 - 0.00000 - - 2s 682 98 infeasible 21 - 0.00000 - 72.3 5s 719 117 0.00000 18 282 - 0.00000 - 72.4 10s 881 143 0.00000 21 266 - 0.00000 - 124 15s 1575 241 infeasible 25 - 0.00000 - 128 20s 2180 262 infeasible 23 - 0.00000 - 137 25s 2916 424 0.00000 24 244 - 0.00000 - 136 30s * 3549 1 26 0.0000000 0.00000 0.0% 138 34s Cutting planes: Zero half: 19 Explored 3550 nodes (523586 simplex iterations) in 34.75 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