current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:55 2012 Optimize a model with 24708 rows, 2532 columns and 75632 nonzeros Presolve time: 0.10s Presolved: 24708 rows, 2532 columns, 75632 nonzeros Variable types: 0 continuous, 2532 integer (2532 binary) Root relaxation: objective 0.000000e+00, 125 iterations, 0.02 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 (375 simplex iterations) in 0.16 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 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:55 2012 Optimize a model with 11958 rows, 1662 columns and 36512 nonzeros Presolve time: 0.04s Presolved: 11958 rows, 1662 columns, 36512 nonzeros Variable types: 0 continuous, 1662 integer (1662 binary) Root relaxation: objective 0.000000e+00, 129 iterations, 0.01 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 (1430 simplex iterations) in 0.16 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:56 2012 Optimize a model with 6008 rows, 1256 columns and 18256 nonzeros Presolve time: 0.02s Presolved: 6008 rows, 1256 columns, 18256 nonzeros Variable types: 0 continuous, 1256 integer (1256 binary) Root relaxation: objective 0.000000e+00, 117 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 60 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3683 simplex iterations) in 0.59 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: 7 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:15:56 2012 Optimize a model with 8558 rows, 1430 columns and 26080 nonzeros Presolve time: 0.02s Presolved: 8558 rows, 1430 columns, 26080 nonzeros Variable types: 0 continuous, 1430 integer (1430 binary) Root relaxation: objective 0.000000e+00, 124 iterations, 0.01 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 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 1s 0 0 0.00000 0 211 - 0.00000 - - 1s 0 0 0.00000 0 131 - 0.00000 - - 2s 0 0 0.00000 0 185 - 0.00000 - - 3s 0 0 0.00000 0 169 - 0.00000 - - 5s 0 0 0.00000 0 168 - 0.00000 - - 6s 0 0 0.00000 0 188 - 0.00000 - - 7s 0 0 0.00000 0 185 - 0.00000 - - 8s 0 0 0.00000 0 211 - 0.00000 - - 9s 0 0 0.00000 0 206 - 0.00000 - - 10s 0 2 0.00000 0 198 - 0.00000 - - 11s 210 8 0.00000 14 149 - 0.00000 - 150 15s 523 9 0.00000 13 163 - 0.00000 - 155 20s 867 15 infeasible 17 - 0.00000 - 149 25s Cutting planes: Clique: 232 Zero half: 4 Explored 1185 nodes (226105 simplex iterations) in 29.66 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 10 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:26 2012 Optimize a model with 10258 rows, 1546 columns and 31296 nonzeros Presolve time: 0.03s Presolved: 10258 rows, 1546 columns, 31296 nonzeros Variable types: 0 continuous, 1546 integer (1546 binary) Root relaxation: objective 0.000000e+00, 131 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 16 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1620 simplex iterations) in 0.17 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: 10 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:27 2012 Optimize a model with 9408 rows, 1488 columns and 28688 nonzeros Presolve time: 0.03s Presolved: 9408 rows, 1488 columns, 28688 nonzeros Variable types: 0 continuous, 1488 integer (1488 binary) Root relaxation: objective 0.000000e+00, 129 iterations, 0.01 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1656 simplex iterations) in 0.15 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: 11