current bounds on the number of colors: 0 -- 149 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:46 2012 Optimize a model with 39813 rows, 11562 columns and 130018 nonzeros Presolve time: 0.15s Presolved: 39813 rows, 11562 columns, 130018 nonzeros Variable types: 0 continuous, 11562 integer (11562 binary) Root relaxation: objective 0.000000e+00, 492 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 (797 simplex iterations) in 0.24 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 -- 74 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:47 2012 Optimize a model with 19981 rows, 6049 columns and 65009 nonzeros Presolve time: 0.10s Presolved: 19981 rows, 6049 columns, 65009 nonzeros Variable types: 0 continuous, 6049 integer (6049 binary) Root relaxation: objective 0.000000e+00, 415 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 (714 simplex iterations) in 0.14 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:47 2012 Optimize a model with 9797 rows, 3218 columns and 31626 nonzeros Presolve time: 0.04s Presolved: 9797 rows, 3218 columns, 31626 nonzeros Variable types: 0 continuous, 3218 integer (3218 binary) Root relaxation: objective 0.000000e+00, 301 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 (547 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:47 2012 Optimize a model with 4973 rows, 1877 columns and 15813 nonzeros Presolve time: 0.01s Presolved: 4973 rows, 1877 columns, 15813 nonzeros Variable types: 0 continuous, 1877 integer (1877 binary) Root relaxation: objective 0.000000e+00, 327 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 (690 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 18:46:47 2012 Optimize a model with 2293 rows, 1132 columns and 7028 nonzeros Presolve time: 0.01s Presolved: 2293 rows, 1132 columns, 7028 nonzeros Variable types: 0 continuous, 1132 integer (1132 binary) Root relaxation: objective 0.000000e+00, 324 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 0 270 - 0.00000 - - 0s 0 0 0.00000 0 307 - 0.00000 - - 0s Cutting planes: Clique: 12 Zero half: 1 Explored 0 nodes (4410 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:46:48 2012 Optimize a model with 1221 rows, 834 columns and 3514 nonzeros Presolve removed 149 rows and 149 columns Presolve time: 0.00s Presolved: 1072 rows, 685 columns, 3216 nonzeros Variable types: 0 continuous, 685 integer (685 binary) Root relaxation: objective 0.000000e+00, 159 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 0 149 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (653 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 18:46:48 2012 Optimize a model with 1757 rows, 983 columns and 5271 nonzeros Presolve time: 0.00s Presolved: 1757 rows, 983 columns, 5271 nonzeros Variable types: 0 continuous, 983 integer (983 binary) Root relaxation: objective 0.000000e+00, 384 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 0 286 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3474 simplex iterations) in 0.24 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