current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:59 2012 Optimize a model with 28878 rows, 9474 columns and 95274 nonzeros Presolve time: 0.14s Presolved: 28878 rows, 9474 columns, 95274 nonzeros Variable types: 0 continuous, 9474 integer (9474 binary) Root relaxation: objective 0.000000e+00, 414 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 (675 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:00 2012 Optimize a model with 14292 rows, 4884 columns and 46926 nonzeros Presolve time: 0.07s Presolved: 14292 rows, 4884 columns, 46926 nonzeros Variable types: 0 continuous, 4884 integer (4884 binary) Root relaxation: objective 0.000000e+00, 373 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 (626 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:00 2012 Optimize a model with 6999 rows, 2589 columns and 22752 nonzeros Presolve time: 0.03s Presolved: 6999 rows, 2589 columns, 22752 nonzeros Variable types: 0 continuous, 2589 integer (2589 binary) Root relaxation: objective 0.000000e+00, 276 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 (474 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:00 2012 Optimize a model with 3567 rows, 1509 columns and 11376 nonzeros Presolve time: 0.01s Presolved: 3567 rows, 1509 columns, 11376 nonzeros Variable types: 0 continuous, 1509 integer (1509 binary) Root relaxation: objective 0.000000e+00, 297 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 (525 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:00 2012 Optimize a model with 1851 rows, 969 columns and 5688 nonzeros Presolve time: 0.00s Presolved: 1851 rows, 969 columns, 5688 nonzeros Variable types: 0 continuous, 969 integer (969 binary) Root relaxation: objective 0.000000e+00, 299 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 (1234 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:01 2012 Optimize a model with 993 rows, 699 columns and 2844 nonzeros Presolve removed 135 rows and 135 columns Presolve time: 0.00s Presolved: 858 rows, 564 columns, 2574 nonzeros Variable types: 0 continuous, 564 integer (564 binary) Root relaxation: objective 0.000000e+00, 137 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 0 135 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (543 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 18:37:01 2012 Optimize a model with 1422 rows, 834 columns and 4266 nonzeros Presolve time: 0.00s Presolved: 1422 rows, 834 columns, 4266 nonzeros Variable types: 0 continuous, 834 integer (834 binary) Root relaxation: objective 0.000000e+00, 314 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 0 262 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 2 0.00000 0 254 - 0.00000 - - 1s Cutting planes: Zero half: 13 Explored 3 nodes (19286 simplex iterations) in 1.48 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4