current bounds on the number of colors: 0 -- 143 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:47 2012 Optimize a model with 38625 rows, 10695 columns and 125599 nonzeros Presolve time: 0.15s Presolved: 38625 rows, 10695 columns, 125599 nonzeros Variable types: 0 continuous, 10695 integer (10695 binary) Root relaxation: objective 0.000000e+00, 466 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 (754 simplex iterations) in 0.23 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 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:47 2012 Optimize a model with 19113 rows, 5547 columns and 61915 nonzeros Presolve time: 0.10s Presolved: 19113 rows, 5547 columns, 61915 nonzeros Variable types: 0 continuous, 5547 integer (5547 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 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:48 2012 Optimize a model with 9357 rows, 2973 columns and 30073 nonzeros Presolve time: 0.03s Presolved: 9357 rows, 2973 columns, 30073 nonzeros Variable types: 0 continuous, 2973 integer (2973 binary) Root relaxation: objective 0.000000e+00, 288 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 (543 simplex iterations) in 0.05 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 Fri Dec 14 18:41:48 2012 Optimize a model with 4479 rows, 1686 columns and 14152 nonzeros Presolve time: 0.01s Presolved: 4479 rows, 1686 columns, 14152 nonzeros Variable types: 0 continuous, 1686 integer (1686 binary) Root relaxation: objective 0.000000e+00, 341 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 (609 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:48 2012 Optimize a model with 2311 rows, 1114 columns and 7076 nonzeros Presolve time: 0.01s Presolved: 2311 rows, 1114 columns, 7076 nonzeros Variable types: 0 continuous, 1114 integer (1114 binary) Root relaxation: objective 0.000000e+00, 338 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 0 254 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 108 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (8053 simplex iterations) in 0.67 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 18:41:49 2012 Optimize a model with 1227 rows, 828 columns and 3538 nonzeros Presolve removed 143 rows and 143 columns Presolve time: 0.00s Presolved: 1084 rows, 685 columns, 3252 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 0 143 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (633 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 18:41:49 2012 Optimize a model with 1769 rows, 971 columns and 5307 nonzeros Presolve time: 0.00s Presolved: 1769 rows, 971 columns, 5307 nonzeros Variable types: 0 continuous, 971 integer (971 binary) Root relaxation: objective 0.000000e+00, 348 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3325 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