current bounds on the number of colors: 0 -- 168 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:40:12 2012 Optimize a model with 60984 rows, 14836 columns and 196560 nonzeros Presolve time: 0.18s Presolved: 60984 rows, 14836 columns, 196560 nonzeros Variable types: 0 continuous, 14836 integer (14836 binary) Root relaxation: objective 0.000000e+00, 628 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 (1007 simplex iterations) in 0.33 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:40:13 2012 Optimize a model with 30576 rows, 7780 columns and 98280 nonzeros Presolve time: 0.14s Presolved: 30576 rows, 7780 columns, 98280 nonzeros Variable types: 0 continuous, 7780 integer (7780 binary) Root relaxation: objective 0.000000e+00, 550 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 (933 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 20:40:14 2012 Optimize a model with 15372 rows, 4252 columns and 49140 nonzeros Presolve time: 0.06s Presolved: 15372 rows, 4252 columns, 49140 nonzeros Variable types: 0 continuous, 4252 integer (4252 binary) Root relaxation: objective 0.000000e+00, 355 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 (864 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:40:14 2012 Optimize a model with 7408 rows, 2404 columns and 23400 nonzeros Presolve time: 0.02s Presolved: 7408 rows, 2404 columns, 23400 nonzeros Variable types: 0 continuous, 2404 integer (2404 binary) Root relaxation: objective 0.000000e+00, 357 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 (666 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 20:40:14 2012 Optimize a model with 3788 rows, 1564 columns and 11700 nonzeros Presolve time: 0.01s Presolved: 3788 rows, 1564 columns, 11700 nonzeros Variable types: 0 continuous, 1564 integer (1564 binary) Root relaxation: objective 0.000000e+00, 368 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 (1637 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 20:40:14 2012 Optimize a model with 1616 rows, 1060 columns and 4680 nonzeros Presolve removed 168 rows and 168 columns Presolve time: 0.00s Presolved: 1448 rows, 892 columns, 4344 nonzeros Variable types: 0 continuous, 892 integer (892 binary) Root relaxation: objective 0.000000e+00, 173 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 0 168 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (728 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 20:40:14 2012 Optimize a model with 2340 rows, 1228 columns and 7020 nonzeros Presolve time: 0.01s Presolved: 2340 rows, 1228 columns, 7020 nonzeros Variable types: 0 continuous, 1228 integer (1228 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 0 334 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4029 simplex iterations) in 0.38 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 20:40:15 2012 Optimize a model with 3064 rows, 1396 columns and 9360 nonzeros Presolve time: 0.01s Presolved: 3064 rows, 1396 columns, 9360 nonzeros Variable types: 0 continuous, 1396 integer (1396 binary) Root relaxation: objective 0.000000e+00, 407 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 0 320 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 0 0.00000 0 264 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 0 0.00000 0 232 - 0.00000 - - 2s 0 0 0.00000 0 230 - 0.00000 - - 3s 0 0 0.00000 0 283 - 0.00000 - - 3s 0 0 0.00000 0 219 - 0.00000 - - 3s 0 2 0.00000 0 219 - 0.00000 - - 3s 376 44 0.00000 13 280 - 0.00000 - 71.8 5s 810 70 0.00000 17 250 - 0.00000 - 68.0 10s 970 79 infeasible 38 - 0.00000 - 119 15s 1519 136 infeasible 37 - 0.00000 - 137 20s 2051 122 0.00000 36 282 - 0.00000 - 148 25s 2569 128 0.00000 29 290 - 0.00000 - 155 30s 3114 141 0.00000 33 288 - 0.00000 - 159 35s 3658 151 infeasible 35 - 0.00000 - 162 40s 4177 168 infeasible 33 - 0.00000 - 164 45s * 4665 2 37 0.0000000 0.00000 0.0% 166 49s Cutting planes: Zero half: 13 Explored 4666 nodes (814411 simplex iterations) in 49.78 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