current bounds on the number of colors: 0 -- 70 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:03 2012 Optimize a model with 8330 rows, 2686 columns and 27230 nonzeros Presolve time: 0.04s Presolved: 8330 rows, 2686 columns, 27230 nonzeros Variable types: 0 continuous, 2686 integer (2686 binary) Root relaxation: objective 0.000000e+00, 183 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 (321 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 -- 35 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:03 2012 Optimize a model with 4082 rows, 1426 columns and 13226 nonzeros Presolve time: 0.01s Presolved: 4082 rows, 1426 columns, 13226 nonzeros Variable types: 0 continuous, 1426 integer (1426 binary) Root relaxation: objective 0.000000e+00, 149 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 (262 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 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:03 2012 Optimize a model with 1958 rows, 796 columns and 6224 nonzeros Presolve time: 0.01s Presolved: 1958 rows, 796 columns, 6224 nonzeros Variable types: 0 continuous, 796 integer (796 binary) Root relaxation: objective 0.000000e+00, 155 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 (268 simplex iterations) in 0.01 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 Thu Dec 13 19:38:03 2012 Optimize a model with 1014 rows, 516 columns and 3112 nonzeros Presolve time: 0.00s Presolved: 1014 rows, 516 columns, 3112 nonzeros Variable types: 0 continuous, 516 integer (516 binary) Root relaxation: objective 0.000000e+00, 160 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 (979 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:03 2012 Optimize a model with 542 rows, 376 columns and 1556 nonzeros Presolve removed 70 rows and 70 columns Presolve time: 0.00s Presolved: 472 rows, 306 columns, 1416 nonzeros Variable types: 0 continuous, 306 integer (306 binary) Root relaxation: objective 0.000000e+00, 73 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 70 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (307 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 Thu Dec 13 19:38:03 2012 Optimize a model with 778 rows, 446 columns and 2334 nonzeros Presolve time: 0.00s Presolved: 778 rows, 446 columns, 2334 nonzeros Variable types: 0 continuous, 446 integer (446 binary) Root relaxation: objective 0.000000e+00, 170 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 0 130 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1368 simplex iterations) in 0.07 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