current bounds on the number of colors: 0 -- 175 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:15 2012 Optimize a model with 66034 rows, 15982 columns and 212802 nonzeros Presolve time: 0.20s Presolved: 66034 rows, 15982 columns, 212802 nonzeros Variable types: 0 continuous, 15982 integer (15982 binary) Root relaxation: objective 0.000000e+00, 663 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 (1029 simplex iterations) in 0.36 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 -- 87 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:16 2012 Optimize a model with 32726 rows, 8282 columns and 105178 nonzeros Presolve time: 0.14s Presolved: 32726 rows, 8282 columns, 105178 nonzeros Variable types: 0 continuous, 8282 integer (8282 binary) Root relaxation: objective 0.000000e+00, 511 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 (885 simplex iterations) in 0.21 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:16 2012 Optimize a model with 16072 rows, 4432 columns and 51366 nonzeros Presolve time: 0.06s Presolved: 16072 rows, 4432 columns, 51366 nonzeros Variable types: 0 continuous, 4432 integer (4432 binary) Root relaxation: objective 0.000000e+00, 369 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 (673 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 22:46:17 2012 Optimize a model with 7745 rows, 2507 columns and 24460 nonzeros Presolve time: 0.02s Presolved: 7745 rows, 2507 columns, 24460 nonzeros Variable types: 0 continuous, 2507 integer (2507 binary) Root relaxation: objective 0.000000e+00, 388 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 (683 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 22:46:17 2012 Optimize a model with 3960 rows, 1632 columns and 12230 nonzeros Presolve time: 0.01s Presolved: 3960 rows, 1632 columns, 12230 nonzeros Variable types: 0 continuous, 1632 integer (1632 binary) Root relaxation: objective 0.000000e+00, 374 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 (1782 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 22:46:17 2012 Optimize a model with 1689 rows, 1107 columns and 4892 nonzeros Presolve removed 175 rows and 175 columns Presolve time: 0.00s Presolved: 1514 rows, 932 columns, 4542 nonzeros Variable types: 0 continuous, 932 integer (932 binary) Root relaxation: objective 0.000000e+00, 189 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 0 175 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (770 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 22:46:17 2012 Optimize a model with 2446 rows, 1282 columns and 7338 nonzeros Presolve time: 0.01s Presolved: 2446 rows, 1282 columns, 7338 nonzeros Variable types: 0 continuous, 1282 integer (1282 binary) Root relaxation: objective 0.000000e+00, 398 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 0 264 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5373 simplex iterations) in 0.47 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 22:46:18 2012 Optimize a model with 3203 rows, 1457 columns and 9784 nonzeros Presolve time: 0.01s Presolved: 3203 rows, 1457 columns, 9784 nonzeros Variable types: 0 continuous, 1457 integer (1457 binary) Root relaxation: objective 0.000000e+00, 387 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 0 332 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 2s 0 0 0.00000 0 291 - 0.00000 - - 2s 0 0 0.00000 0 274 - 0.00000 - - 2s 0 0 0.00000 0 270 - 0.00000 - - 3s 0 0 0.00000 0 264 - 0.00000 - - 3s 0 0 0.00000 0 258 - 0.00000 - - 3s 0 0 0.00000 0 265 - 0.00000 - - 3s 0 0 0.00000 0 253 - 0.00000 - - 4s 0 0 0.00000 0 261 - 0.00000 - - 4s 0 0 0.00000 0 260 - 0.00000 - - 4s 0 2 0.00000 0 260 - 0.00000 - - 4s 4 4 0.00000 2 336 - 0.00000 - 533 5s 613 99 0.00000 7 367 - 0.00000 - 104 10s 618 102 0.00000 14 370 - 0.00000 - 103 15s 999 30 infeasible 19 - 0.00000 - 151 20s 1460 23 0.00000 24 254 - 0.00000 - 161 25s Cutting planes: Gomory: 2 Zero half: 6 Explored 1624 nodes (320527 simplex iterations) in 27.28 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