current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:41 2012 Optimize a model with 1324 rows, 964 columns and 4746 nonzeros Presolve removed 3 rows and 63 columns Presolve time: 0.01s Presolved: 1321 rows, 901 columns, 4683 nonzeros Variable types: 0 continuous, 901 integer (901 binary) Root relaxation: objective 0.000000e+00, 87 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:41 2012 Optimize a model with 653 rows, 491 columns and 2260 nonzeros Presolve removed 3 rows and 30 columns Presolve time: 0.00s Presolved: 650 rows, 461 columns, 2230 nonzeros Variable types: 0 continuous, 461 integer (461 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (78 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:41 2012 Optimize a model with 348 rows, 276 columns and 1130 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 345 rows, 261 columns, 1115 nonzeros Variable types: 0 continuous, 261 integer (261 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 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 Fri Dec 14 18:19:41 2012 Optimize a model with 165 rows, 147 columns and 452 nonzeros Presolve removed 43 rows and 46 columns Presolve time: 0.00s Presolved: 122 rows, 101 columns, 366 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Root relaxation: objective 0.000000e+00, 45 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 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (157 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 Fri Dec 14 18:19:41 2012 Optimize a model with 226 rows, 190 columns and 678 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 223 rows, 181 columns, 669 nonzeros Variable types: 0 continuous, 181 integer (181 binary) Root relaxation: objective 0.000000e+00, 93 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 (196 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: 3