current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:11 2012 Optimize a model with 7073 rows, 9418 columns and 30124 nonzeros Presolve removed 29 rows and 1972 columns Presolve time: 0.09s Presolved: 7044 rows, 7446 columns, 28152 nonzeros Variable types: 0 continuous, 7446 integer (7446 binary) Root relaxation: objective 0.000000e+00, 194 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 (284 simplex iterations) in 0.11 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 -- 68 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:11 2012 Optimize a model with 3605 rows, 4760 columns and 15062 nonzeros Presolve removed 29 rows and 986 columns Presolve time: 0.03s Presolved: 3576 rows, 3774 columns, 14076 nonzeros Variable types: 0 continuous, 3774 integer (3774 binary) Root relaxation: objective 0.000000e+00, 194 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 (282 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:11 2012 Optimize a model with 1871 rows, 2431 columns and 7531 nonzeros Presolve removed 29 rows and 493 columns Presolve time: 0.01s Presolved: 1842 rows, 1938 columns, 7038 nonzeros Variable types: 0 continuous, 1938 integer (1938 binary) Root relaxation: objective 0.000000e+00, 194 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 (194 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:12 2012 Optimize a model with 953 rows, 1198 columns and 3544 nonzeros Presolve removed 29 rows and 232 columns Presolve time: 0.00s Presolved: 924 rows, 966 columns, 3312 nonzeros Variable types: 0 continuous, 966 integer (966 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 (180 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 16:18:12 2012 Optimize a model with 545 rows, 650 columns and 1772 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 516 rows, 534 columns, 1656 nonzeros Variable types: 0 continuous, 534 integer (534 binary) Root relaxation: objective 0.000000e+00, 158 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 (158 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 16:18:12 2012 Optimize a model with 341 rows, 376 columns and 886 nonzeros Presolve removed 155 rows and 193 columns Presolve time: 0.00s Presolved: 186 rows, 183 columns, 558 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Root relaxation: objective 0.000000e+00, 90 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 73 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (268 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 16:18:12 2012 Optimize a model with 443 rows, 513 columns and 1329 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 414 rows, 426 columns, 1242 nonzeros Variable types: 0 continuous, 426 integer (426 binary) Root relaxation: objective 0.000000e+00, 172 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 (172 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