current bounds on the number of colors: 0 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:16 2012 Optimize a model with 6385 rows, 3092 columns and 21850 nonzeros Presolve removed 1 rows and 38 columns Presolve time: 0.04s Presolved: 6384 rows, 3054 columns, 21812 nonzeros Variable types: 0 continuous, 3054 integer (3054 binary) Root relaxation: objective 0.000000e+00, 178 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 (178 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:16 2012 Optimize a model with 3231 rows, 1629 columns and 10925 nonzeros Presolve removed 1 rows and 19 columns Presolve time: 0.01s Presolved: 3230 rows, 1610 columns, 10906 nonzeros Variable types: 0 continuous, 1610 integer (1610 binary) Root relaxation: objective 0.000000e+00, 191 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 (337 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:16 2012 Optimize a model with 1571 rows, 859 columns and 5175 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.01s Presolved: 1570 rows, 850 columns, 5166 nonzeros Variable types: 0 continuous, 850 integer (850 binary) Root relaxation: objective 0.000000e+00, 168 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 (273 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:16 2012 Optimize a model with 741 rows, 474 columns and 2300 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 740 rows, 470 columns, 2296 nonzeros Variable types: 0 continuous, 470 integer (470 binary) Root relaxation: objective 0.000000e+00, 166 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 (382 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:16 2012 Optimize a model with 409 rows, 320 columns and 1150 nonzeros Presolve removed 77 rows and 78 columns Presolve time: 0.00s Presolved: 332 rows, 242 columns, 996 nonzeros Variable types: 0 continuous, 242 integer (242 binary) Root relaxation: objective 0.000000e+00, 80 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 76 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (282 simplex iterations) in 0.00 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 18:21:16 2012 Optimize a model with 575 rows, 397 columns and 1725 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 574 rows, 394 columns, 1722 nonzeros Variable types: 0 continuous, 394 integer (394 binary) Root relaxation: objective 0.000000e+00, 197 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 0 148 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (541 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% optimal solution found: number of colors: 3