current bounds on the number of colors: 0 -- 146 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:23 2012 Optimize a model with 40807 rows, 11215 columns and 132641 nonzeros Presolve time: 0.16s Presolved: 40807 rows, 11215 columns, 132641 nonzeros Variable types: 0 continuous, 11215 integer (11215 binary) Root relaxation: objective 0.000000e+00, 519 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 (849 simplex iterations) in 0.25 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 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:24 2012 Optimize a model with 20198 rows, 5813 columns and 65412 nonzeros Presolve time: 0.10s Presolved: 20198 rows, 5813 columns, 65412 nonzeros Variable types: 0 continuous, 5813 integer (5813 binary) Root relaxation: objective 0.000000e+00, 433 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 (771 simplex iterations) in 0.15 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:24 2012 Optimize a model with 10172 rows, 3185 columns and 32706 nonzeros Presolve time: 0.04s Presolved: 10172 rows, 3185 columns, 32706 nonzeros Variable types: 0 continuous, 3185 integer (3185 binary) Root relaxation: objective 0.000000e+00, 300 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 (561 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 18:44:24 2012 Optimize a model with 5159 rows, 1871 columns and 16353 nonzeros Presolve time: 0.02s Presolved: 5159 rows, 1871 columns, 16353 nonzeros Variable types: 0 continuous, 1871 integer (1871 binary) Root relaxation: objective 0.000000e+00, 306 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 0.03 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 18:44:25 2012 Optimize a model with 2374 rows, 1141 columns and 7268 nonzeros Presolve time: 0.01s Presolved: 2374 rows, 1141 columns, 7268 nonzeros Variable types: 0 continuous, 1141 integer (1141 binary) Root relaxation: objective 0.000000e+00, 347 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 0 270 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (6285 simplex iterations) in 0.38 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 18:44:25 2012 Optimize a model with 1260 rows, 849 columns and 3634 nonzeros Presolve removed 146 rows and 146 columns Presolve time: 0.00s Presolved: 1114 rows, 703 columns, 3342 nonzeros Variable types: 0 continuous, 703 integer (703 binary) Root relaxation: objective 0.000000e+00, 154 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 0 146 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (618 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 18:44:25 2012 Optimize a model with 1817 rows, 995 columns and 5451 nonzeros Presolve time: 0.00s Presolved: 1817 rows, 995 columns, 5451 nonzeros Variable types: 0 continuous, 995 integer (995 binary) Root relaxation: objective 0.000000e+00, 312 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 0 284 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3265 simplex iterations) in 0.27 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