current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 5428 rows, 9124 columns and 24924 nonzeros Presolve removed 44 rows and 2948 columns Presolve time: 0.07s Presolved: 5384 rows, 6176 columns, 21976 nonzeros Variable types: 0 continuous, 6176 integer (6176 binary) Root relaxation: objective 0.000000e+00, 151 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 (151 simplex iterations) in 0.08 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 -- 67 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 2742 rows, 4534 columns and 12276 nonzeros Presolve removed 44 rows and 1452 columns Presolve time: 0.02s Presolved: 2698 rows, 3082 columns, 10824 nonzeros Variable types: 0 continuous, 3082 integer (3082 binary) Root relaxation: objective 0.000000e+00, 150 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 (150 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 1399 rows, 2239 columns and 5952 nonzeros Presolve removed 44 rows and 704 columns Presolve time: 0.01s Presolved: 1355 rows, 1535 columns, 5248 nonzeros Variable types: 0 continuous, 1535 integer (1535 binary) Root relaxation: objective 0.000000e+00, 153 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 (153 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 767 rows, 1159 columns and 2976 nonzeros Presolve removed 44 rows and 352 columns Presolve time: 0.00s Presolved: 723 rows, 807 columns, 2624 nonzeros Variable types: 0 continuous, 807 integer (807 binary) Root relaxation: objective 0.000000e+00, 152 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 (216 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 451 rows, 619 columns and 1488 nonzeros Presolve removed 44 rows and 176 columns Presolve time: 0.00s Presolved: 407 rows, 443 columns, 1312 nonzeros Variable types: 0 continuous, 443 integer (443 binary) Root relaxation: objective 0.000000e+00, 127 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 (127 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:01 2012 Optimize a model with 293 rows, 349 columns and 744 nonzeros Presolve removed 147 rows and 197 columns Presolve time: 0.00s Presolved: 146 rows, 152 columns, 438 nonzeros Variable types: 0 continuous, 152 integer (152 binary) Root relaxation: objective 0.000000e+00, 66 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 8 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (171 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 Sat Dec 15 16:18:01 2012 Optimize a model with 372 rows, 484 columns and 1116 nonzeros Presolve removed 44 rows and 132 columns Presolve time: 0.00s Presolved: 328 rows, 352 columns, 984 nonzeros Variable types: 0 continuous, 352 integer (352 binary) Root relaxation: objective 0.000000e+00, 133 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 (133 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