current bounds on the number of colors: 0 -- 165 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:01:45 2012 Optimize a model with 59369 rows, 14252 columns and 191142 nonzeros Presolve time: 0.18s Presolved: 59369 rows, 14252 columns, 191142 nonzeros Variable types: 0 continuous, 14252 integer (14252 binary) Root relaxation: objective 0.000000e+00, 630 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 (999 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:01:46 2012 Optimize a model with 29767 rows, 7487 columns and 95571 nonzeros Presolve time: 0.14s Presolved: 29767 rows, 7487 columns, 95571 nonzeros Variable types: 0 continuous, 7487 integer (7487 binary) Root relaxation: objective 0.000000e+00, 451 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 (781 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:01:47 2012 Optimize a model with 14605 rows, 4022 columns and 46620 nonzeros Presolve time: 0.06s Presolved: 14605 rows, 4022 columns, 46620 nonzeros Variable types: 0 continuous, 4022 integer (4022 binary) Root relaxation: objective 0.000000e+00, 338 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 (653 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 20:01:47 2012 Optimize a model with 7385 rows, 2372 columns and 23310 nonzeros Presolve time: 0.02s Presolved: 7385 rows, 2372 columns, 23310 nonzeros Variable types: 0 continuous, 2372 integer (2372 binary) Root relaxation: objective 0.000000e+00, 350 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 (679 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 20:01:47 2012 Optimize a model with 3775 rows, 1547 columns and 11655 nonzeros Presolve time: 0.01s Presolved: 3775 rows, 1547 columns, 11655 nonzeros Variable types: 0 continuous, 1547 integer (1547 binary) Root relaxation: objective 0.000000e+00, 362 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 (2255 simplex iterations) in 0.12 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 20:01:47 2012 Optimize a model with 1609 rows, 1052 columns and 4662 nonzeros Presolve removed 165 rows and 165 columns Presolve time: 0.00s Presolved: 1444 rows, 887 columns, 4332 nonzeros Variable types: 0 continuous, 887 integer (887 binary) Root relaxation: objective 0.000000e+00, 182 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 0 165 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (710 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 20:01:47 2012 Optimize a model with 2331 rows, 1217 columns and 6993 nonzeros Presolve time: 0.01s Presolved: 2331 rows, 1217 columns, 6993 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 404 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 0 326 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3905 simplex iterations) in 0.40 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 20:01:48 2012 Optimize a model with 3053 rows, 1382 columns and 9324 nonzeros Presolve time: 0.01s Presolved: 3053 rows, 1382 columns, 9324 nonzeros Variable types: 0 continuous, 1382 integer (1382 binary) Root relaxation: objective 0.000000e+00, 390 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 381 - 0.00000 - - 0s 0 0 0.00000 0 375 - 0.00000 - - 1s 0 0 0.00000 0 379 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 2s 0 0 0.00000 0 390 - 0.00000 - - 2s 0 0 0.00000 0 349 - 0.00000 - - 2s 0 2 0.00000 0 349 - 0.00000 - - 3s 426 36 0.00000 17 272 - 0.00000 - 89.3 5s 908 53 0.00000 15 339 - 0.00000 - 82.2 10s 1078 26 infeasible 20 - 0.00000 - 121 15s 1587 53 0.00000 22 335 - 0.00000 - 137 20s 2090 70 0.00000 18 260 - 0.00000 - 148 25s 2573 51 infeasible 20 - 0.00000 - 156 30s 2997 35 infeasible 25 - 0.00000 - 163 35s 3440 32 infeasible 27 - 0.00000 - 167 40s 3871 17 0.00000 17 312 - 0.00000 - 171 45s Cutting planes: Gomory: 1 Zero half: 8 Explored 4185 nodes (744883 simplex iterations) in 48.55 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