current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:49 2012 Optimize a model with 47424 rows, 12174 columns and 153368 nonzeros Presolve time: 0.16s Presolved: 47424 rows, 12174 columns, 153368 nonzeros Variable types: 0 continuous, 12174 integer (12174 binary) Root relaxation: objective 0.000000e+00, 560 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 (876 simplex iterations) in 0.27 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:50 2012 Optimize a model with 23788 rows, 6398 columns and 76684 nonzeros Presolve time: 0.12s Presolved: 23788 rows, 6398 columns, 76684 nonzeros Variable types: 0 continuous, 6398 integer (6398 binary) Root relaxation: objective 0.000000e+00, 407 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 (707 simplex iterations) in 0.17 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:50 2012 Optimize a model with 11970 rows, 3510 columns and 38342 nonzeros Presolve time: 0.04s Presolved: 11970 rows, 3510 columns, 38342 nonzeros Variable types: 0 continuous, 3510 integer (3510 binary) Root relaxation: objective 0.000000e+00, 305 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 (583 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:50 2012 Optimize a model with 5750 rows, 1990 columns and 18162 nonzeros Presolve time: 0.02s Presolved: 5750 rows, 1990 columns, 18162 nonzeros Variable types: 0 continuous, 1990 integer (1990 binary) Root relaxation: objective 0.000000e+00, 329 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 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:50 2012 Optimize a model with 2640 rows, 1230 columns and 8072 nonzeros Presolve time: 0.01s Presolved: 2640 rows, 1230 columns, 8072 nonzeros Variable types: 0 continuous, 1230 integer (1230 binary) Root relaxation: objective 0.000000e+00, 335 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 0 286 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 2 0.00000 0 347 - 0.00000 - - 2s 606 75 0.00000 25 216 - 0.00000 - 74.4 5s 614 81 0.00000 21 336 - 0.00000 - 73.4 10s 1246 139 infeasible 33 - 0.00000 - 133 15s 1949 206 infeasible 30 - 0.00000 - 137 20s * 2064 0 31 0.0000000 0.00000 0.0% 137 20s Cutting planes: Gomory: 2 Zero half: 12 Explored 2065 nodes (300705 simplex iterations) in 20.82 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:11 2012 Optimize a model with 1396 rows, 926 columns and 4036 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1244 rows, 774 columns, 3732 nonzeros Variable types: 0 continuous, 774 integer (774 binary) Root relaxation: objective 0.000000e+00, 163 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 0 152 - 0.00000 - - 0s Explored 0 nodes (649 simplex iterations) in 0.01 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:11 2012 Optimize a model with 2018 rows, 1078 columns and 6054 nonzeros Presolve time: 0.01s Presolved: 2018 rows, 1078 columns, 6054 nonzeros Variable types: 0 continuous, 1078 integer (1078 binary) Root relaxation: objective 0.000000e+00, 345 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 416 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 369 Explored 0 nodes (6523 simplex iterations) in 0.71 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4