current bounds on the number of colors: 0 -- 167 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:14:57 2012 Optimize a model with 60923 rows, 14593 columns and 196129 nonzeros Presolve time: 0.18s Presolved: 60923 rows, 14593 columns, 196129 nonzeros Variable types: 0 continuous, 14593 integer (14593 binary) Root relaxation: objective 0.000000e+00, 657 iterations, 0.07 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 (1016 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:14:58 2012 Optimize a model with 30179 rows, 7579 columns and 96883 nonzeros Presolve time: 0.14s Presolved: 30179 rows, 7579 columns, 96883 nonzeros Variable types: 0 continuous, 7579 integer (7579 binary) Root relaxation: objective 0.000000e+00, 545 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 (917 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:14:58 2012 Optimize a model with 14807 rows, 4072 columns and 47260 nonzeros Presolve time: 0.06s Presolved: 14807 rows, 4072 columns, 47260 nonzeros Variable types: 0 continuous, 4072 integer (4072 binary) Root relaxation: objective 0.000000e+00, 341 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 (629 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:14:59 2012 Optimize a model with 7487 rows, 2402 columns and 23630 nonzeros Presolve time: 0.02s Presolved: 7487 rows, 2402 columns, 23630 nonzeros Variable types: 0 continuous, 2402 integer (2402 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 (891 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 20:14:59 2012 Optimize a model with 3827 rows, 1567 columns and 11815 nonzeros Presolve time: 0.01s Presolved: 3827 rows, 1567 columns, 11815 nonzeros Variable types: 0 continuous, 1567 integer (1567 binary) Root relaxation: objective 0.000000e+00, 378 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 (1398 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 20:14:59 2012 Optimize a model with 1631 rows, 1066 columns and 4726 nonzeros Presolve removed 167 rows and 167 columns Presolve time: 0.00s Presolved: 1464 rows, 899 columns, 4392 nonzeros Variable types: 0 continuous, 899 integer (899 binary) Root relaxation: objective 0.000000e+00, 177 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 Explored 0 nodes (716 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 20:14:59 2012 Optimize a model with 2363 rows, 1233 columns and 7089 nonzeros Presolve time: 0.01s Presolved: 2363 rows, 1233 columns, 7089 nonzeros Variable types: 0 continuous, 1233 integer (1233 binary) Root relaxation: objective 0.000000e+00, 392 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3985 simplex iterations) in 0.44 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 20:14:59 2012 Optimize a model with 3095 rows, 1400 columns and 9452 nonzeros Presolve time: 0.01s Presolved: 3095 rows, 1400 columns, 9452 nonzeros Variable types: 0 continuous, 1400 integer (1400 binary) Root relaxation: objective 0.000000e+00, 371 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 0 324 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 293 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 276 - 0.00000 - - 2s 0 0 0.00000 0 280 - 0.00000 - - 2s 0 0 0.00000 0 280 - 0.00000 - - 2s 0 2 0.00000 0 280 - 0.00000 - - 2s 576 38 0.00000 15 292 - 0.00000 - 81.8 5s 814 44 0.00000 18 234 - 0.00000 - 78.6 10s 820 48 0.00000 11 335 - 0.00000 - 78.1 15s 1156 16 0.00000 23 276 - 0.00000 - 143 20s 1681 21 infeasible 23 - 0.00000 - 151 25s 2058 8 infeasible 24 - 0.00000 - 164 30s 2500 8 0.00000 24 282 - 0.00000 - 169 35s Cutting planes: Clique: 2 Zero half: 15 Explored 2803 nodes (500385 simplex iterations) in 37.90 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