current bounds on the number of colors: 0 -- 160 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:21:11 2012 Optimize a model with 50400 rows, 13428 columns and 163520 nonzeros Presolve time: 0.16s Presolved: 50400 rows, 13428 columns, 163520 nonzeros Variable types: 0 continuous, 13428 integer (13428 binary) Root relaxation: objective 0.000000e+00, 543 iterations, 0.04 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 (543 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 -- 80 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:21:12 2012 Optimize a model with 25280 rows, 7028 columns and 81760 nonzeros Presolve time: 0.13s Presolved: 25280 rows, 7028 columns, 81760 nonzeros Variable types: 0 continuous, 7028 integer (7028 binary) Root relaxation: objective 0.000000e+00, 472 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 (809 simplex iterations) in 0.18 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:21:13 2012 Optimize a model with 12720 rows, 3828 columns and 40880 nonzeros Presolve time: 0.05s Presolved: 12720 rows, 3828 columns, 40880 nonzeros Variable types: 0 continuous, 3828 integer (3828 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (685 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 19:21:13 2012 Optimize a model with 6440 rows, 2228 columns and 20440 nonzeros Presolve time: 0.02s Presolved: 6440 rows, 2228 columns, 20440 nonzeros Variable types: 0 continuous, 2228 integer (2228 binary) Root relaxation: objective 0.000000e+00, 329 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 (599 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 19:21:13 2012 Optimize a model with 3300 rows, 1428 columns and 10220 nonzeros Presolve time: 0.01s Presolved: 3300 rows, 1428 columns, 10220 nonzeros Variable types: 0 continuous, 1428 integer (1428 binary) Root relaxation: objective 0.000000e+00, 358 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 (1134 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:21:13 2012 Optimize a model with 1416 rows, 948 columns and 4088 nonzeros Presolve removed 160 rows and 160 columns Presolve time: 0.00s Presolved: 1256 rows, 788 columns, 3768 nonzeros Variable types: 0 continuous, 788 integer (788 binary) Root relaxation: objective 0.000000e+00, 168 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 0 160 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (691 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 19:21:13 2012 Optimize a model with 2044 rows, 1108 columns and 6132 nonzeros Presolve time: 0.01s Presolved: 2044 rows, 1108 columns, 6132 nonzeros Variable types: 0 continuous, 1108 integer (1108 binary) Root relaxation: objective 0.000000e+00, 358 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 0 316 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 438 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 2 Zero half: 346 Explored 0 nodes (6412 simplex iterations) in 0.60 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 19:21:14 2012 Optimize a model with 2672 rows, 1268 columns and 8176 nonzeros Presolve time: 0.01s Presolved: 2672 rows, 1268 columns, 8176 nonzeros Variable types: 0 continuous, 1268 integer (1268 binary) Root relaxation: objective 0.000000e+00, 393 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 222 - 0.00000 - - 1s 0 0 0.00000 0 215 - 0.00000 - - 1s 0 0 0.00000 0 301 - 0.00000 - - 1s 0 0 0.00000 0 330 - 0.00000 - - 2s 0 0 0.00000 0 359 - 0.00000 - - 2s 0 0 0.00000 0 354 - 0.00000 - - 2s 0 0 0.00000 0 359 - 0.00000 - - 3s 0 0 0.00000 0 359 - 0.00000 - - 3s 0 2 0.00000 0 359 - 0.00000 - - 3s * 278 6 35 0.0000000 0.00000 0.0% 71.8 4s Cutting planes: Zero half: 25 Explored 279 nodes (57125 simplex iterations) in 4.50 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