current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:48:26 2012 Optimize a model with 45446 rows, 8246 columns and 143472 nonzeros Presolve time: 0.16s Presolved: 45446 rows, 8246 columns, 143472 nonzeros Variable types: 0 continuous, 8246 integer (8246 binary) Root relaxation: objective 0.000000e+00, 329 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 (602 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 -- 61 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:48:27 2012 Optimize a model with 22413 rows, 4433 columns and 70560 nonzeros Presolve time: 0.10s Presolved: 22413 rows, 4433 columns, 70560 nonzeros Variable types: 0 continuous, 4433 integer (4433 binary) Root relaxation: objective 0.000000e+00, 293 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 (558 simplex iterations) in 0.15 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:48:27 2012 Optimize a model with 11268 rows, 2588 columns and 35280 nonzeros Presolve time: 0.04s Presolved: 11268 rows, 2588 columns, 35280 nonzeros Variable types: 0 continuous, 2588 integer (2588 binary) Root relaxation: objective 0.000000e+00, 251 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 (534 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 21:48:27 2012 Optimize a model with 5324 rows, 1604 columns and 16464 nonzeros Presolve time: 0.01s Presolved: 5324 rows, 1604 columns, 16464 nonzeros Variable types: 0 continuous, 1604 integer (1604 binary) Root relaxation: objective 0.000000e+00, 280 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 (1174 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 21:48:27 2012 Optimize a model with 2352 rows, 1112 columns and 7056 nonzeros Presolve time: 0.01s Presolved: 2352 rows, 1112 columns, 7056 nonzeros Variable types: 0 continuous, 1112 integer (1112 binary) Root relaxation: objective 0.000000e+00, 267 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 0 198 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4931 simplex iterations) in 0.56 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 21:48:28 2012 Optimize a model with 3838 rows, 1358 columns and 11760 nonzeros Presolve time: 0.01s Presolved: 3838 rows, 1358 columns, 11760 nonzeros Variable types: 0 continuous, 1358 integer (1358 binary) Root relaxation: objective 0.000000e+00, 257 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 0 230 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 203 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 0 0.00000 0 148 - 0.00000 - - 2s 0 0 0.00000 0 150 - 0.00000 - - 2s 0 0 0.00000 0 196 - 0.00000 - - 2s 0 0 0.00000 0 196 - 0.00000 - - 3s 0 2 0.00000 0 196 - 0.00000 - - 3s 192 67 0.00000 26 164 - 0.00000 - 100 5s 1206 89 0.00000 12 205 - 0.00000 - 71.3 10s 1211 93 0.00000 24 209 - 0.00000 - 71.0 15s 1275 109 infeasible 24 - 0.00000 - 105 20s 1800 84 infeasible 30 - 0.00000 - 121 25s * 2045 1 35 0.0000000 0.00000 0.0% 125 27s Cutting planes: Gomory: 1 Clique: 2 Zero half: 12 Explored 2046 nodes (285894 simplex iterations) in 27.37 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:48:56 2012 Optimize a model with 3095 rows, 1235 columns and 9408 nonzeros Presolve time: 0.01s Presolved: 3095 rows, 1235 columns, 9408 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 275 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 0 240 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 1s 0 0 0.00000 0 379 - 0.00000 - - 1s 0 0 0.00000 0 356 - 0.00000 - - 2s 0 0 0.00000 0 352 - 0.00000 - - 2s 0 0 0.00000 0 329 - 0.00000 - - 3s 0 0 0.00000 0 340 - 0.00000 - - 4s 0 0 0.00000 0 338 - 0.00000 - - 5s 0 0 0.00000 0 333 - 0.00000 - - 5s 0 0 0.00000 0 330 - 0.00000 - - 6s 0 0 0.00000 0 333 - 0.00000 - - 6s 0 0 0.00000 0 350 - 0.00000 - - 7s 0 0 0.00000 0 332 - 0.00000 - - 7s 0 2 0.00000 0 332 - 0.00000 - - 8s Cutting planes: Clique: 9 Zero half: 33 Explored 65 nodes (52956 simplex iterations) in 9.90 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5