current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:11 2012 Optimize a model with 5282 rows, 3025 columns and 18506 nonzeros Presolve removed 4 rows and 152 columns Presolve time: 0.03s Presolved: 5278 rows, 2873 columns, 18354 nonzeros Variable types: 0 continuous, 2873 integer (2873 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 18:21:11 2012 Optimize a model with 2679 rows, 1581 columns and 9253 nonzeros Presolve removed 4 rows and 76 columns Presolve time: 0.01s Presolved: 2675 rows, 1505 columns, 9177 nonzeros Variable types: 0 continuous, 1505 integer (1505 binary) Root relaxation: objective 0.000000e+00, 143 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 (143 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:11 2012 Optimize a model with 1309 rows, 821 columns and 4383 nonzeros Presolve removed 4 rows and 36 columns Presolve time: 0.00s Presolved: 1305 rows, 785 columns, 4347 nonzeros Variable types: 0 continuous, 785 integer (785 binary) Root relaxation: objective 0.000000e+00, 161 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 (259 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 18:21:11 2012 Optimize a model with 624 rows, 441 columns and 1948 nonzeros Presolve removed 4 rows and 16 columns Presolve time: 0.00s Presolved: 620 rows, 425 columns, 1932 nonzeros Variable types: 0 continuous, 425 integer (425 binary) Root relaxation: objective 0.000000e+00, 180 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 (290 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 18:21:11 2012 Optimize a model with 350 rows, 289 columns and 974 nonzeros Presolve removed 76 rows and 80 columns Presolve time: 0.00s Presolved: 274 rows, 209 columns, 822 nonzeros Variable types: 0 continuous, 209 integer (209 binary) Root relaxation: objective 0.000000e+00, 78 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 72 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (284 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 18:21:11 2012 Optimize a model with 487 rows, 365 columns and 1461 nonzeros Presolve removed 4 rows and 12 columns Presolve time: 0.00s Presolved: 483 rows, 353 columns, 1449 nonzeros Variable types: 0 continuous, 353 integer (353 binary) Root relaxation: objective 0.000000e+00, 189 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 46 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (497 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