current bounds on the number of colors: 0 -- 168 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:38:37 2012 Optimize a model with 59640 rows, 14820 columns and 192528 nonzeros Presolve removed 1 rows and 84 columns Presolve time: 0.18s Presolved: 59639 rows, 14736 columns, 192444 nonzeros Variable types: 0 continuous, 14736 integer (14736 binary) Root relaxation: objective 0.000000e+00, 582 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 (931 simplex iterations) in 0.31 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 20:38:38 2012 Optimize a model with 29904 rows, 7764 columns and 96264 nonzeros Presolve removed 1 rows and 42 columns Presolve time: 0.14s Presolved: 29903 rows, 7722 columns, 96222 nonzeros Variable types: 0 continuous, 7722 integer (7722 binary) Root relaxation: objective 0.000000e+00, 455 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 (785 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:38:39 2012 Optimize a model with 15036 rows, 4236 columns and 48132 nonzeros Presolve removed 1 rows and 21 columns Presolve time: 0.06s Presolved: 15035 rows, 4215 columns, 48111 nonzeros Variable types: 0 continuous, 4215 integer (4215 binary) Root relaxation: objective 0.000000e+00, 344 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 (628 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 20:38:39 2012 Optimize a model with 7248 rows, 2388 columns and 22920 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.02s Presolved: 7247 rows, 2378 columns, 22910 nonzeros Variable types: 0 continuous, 2378 integer (2378 binary) Root relaxation: objective 0.000000e+00, 360 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 (952 simplex iterations) in 0.05 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 20:38:39 2012 Optimize a model with 3708 rows, 1548 columns and 11460 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.01s Presolved: 3707 rows, 1543 columns, 11455 nonzeros Variable types: 0 continuous, 1543 integer (1543 binary) Root relaxation: objective 0.000000e+00, 359 iterations, 0.00 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 (1962 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:38:39 2012 Optimize a model with 1584 rows, 1044 columns and 4584 nonzeros Presolve removed 168 rows and 169 columns Presolve time: 0.00s Presolved: 1416 rows, 875 columns, 4248 nonzeros Variable types: 0 continuous, 875 integer (875 binary) Root relaxation: objective 0.000000e+00, 172 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 0 167 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (703 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 20:38:40 2012 Optimize a model with 2292 rows, 1212 columns and 6876 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.01s Presolved: 2291 rows, 1209 columns, 6873 nonzeros Variable types: 0 continuous, 1209 integer (1209 binary) Root relaxation: objective 0.000000e+00, 381 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3819 simplex iterations) in 0.35 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 20:38:40 2012 Optimize a model with 3000 rows, 1380 columns and 9168 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 2999 rows, 1376 columns, 9164 nonzeros Variable types: 0 continuous, 1376 integer (1376 binary) Root relaxation: objective 0.000000e+00, 357 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 2 0.00000 0 258 - 0.00000 - - 2s 707 63 0.00000 18 357 - 0.00000 - 74.8 5s 801 68 infeasible 23 - 0.00000 - 108 10s 1349 48 0.00000 17 246 - 0.00000 - 132 15s 1945 54 infeasible 24 - 0.00000 - 141 20s 2496 55 infeasible 22 - 0.00000 - 148 25s 3103 48 0.00000 20 268 - 0.00000 - 151 30s 3628 45 0.00000 22 335 - 0.00000 - 155 35s Cutting planes: Gomory: 1 Clique: 3 Zero half: 12 Explored 4110 nodes (676933 simplex iterations) in 39.86 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