current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 2715 rows, 1197 columns and 9085 nonzeros Presolve removed 1 rows and 23 columns Presolve time: 0.01s Presolved: 2714 rows, 1174 columns, 9062 nonzeros Variable types: 0 continuous, 1174 integer (1174 binary) Root relaxation: objective 0.000000e+00, 122 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 (122 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 1323 rows, 633 columns and 4345 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.00s Presolved: 1322 rows, 622 columns, 4334 nonzeros Variable types: 0 continuous, 622 integer (622 binary) Root relaxation: objective 0.000000e+00, 100 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 (162 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 627 rows, 351 columns and 1975 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 626 rows, 346 columns, 1970 nonzeros Variable types: 0 continuous, 346 integer (346 binary) Root relaxation: objective 0.000000e+00, 110 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 (219 simplex iterations) in 0.00 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 279 rows, 210 columns and 790 nonzeros Presolve removed 47 rows and 48 columns Presolve time: 0.00s Presolved: 232 rows, 162 columns, 696 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Root relaxation: objective 0.000000e+00, 51 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 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (192 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 395 rows, 257 columns and 1185 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 394 rows, 254 columns, 1182 nonzeros Variable types: 0 continuous, 254 integer (254 binary) Root relaxation: objective 0.000000e+00, 103 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 66 - 0.00000 - - 0s 0 0 0.00000 0 97 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (774 simplex iterations) in 0.02 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:36:11 2012 Optimize a model with 511 rows, 304 columns and 1580 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 510 rows, 300 columns, 1576 nonzeros Variable types: 0 continuous, 300 integer (300 binary) Root relaxation: objective 0.000000e+00, 98 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 (199 simplex iterations) in 0.00 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: 4