current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:20:14 2012 Optimize a model with 24911 rows, 2539 columns and 76241 nonzeros Presolve time: 0.11s Presolved: 24911 rows, 2539 columns, 76241 nonzeros Variable types: 0 continuous, 2539 integer (2539 binary) Root relaxation: objective 0.000000e+00, 157 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 (432 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: 0 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:20:15 2012 Optimize a model with 12056 rows, 1669 columns and 36806 nonzeros Presolve time: 0.04s Presolved: 12056 rows, 1669 columns, 36806 nonzeros Variable types: 0 continuous, 1669 integer (1669 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (853 simplex iterations) in 0.10 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 19:20:15 2012 Optimize a model with 6057 rows, 1263 columns and 18403 nonzeros Presolve time: 0.02s Presolved: 6057 rows, 1263 columns, 18403 nonzeros Variable types: 0 continuous, 1263 integer (1263 binary) Root relaxation: objective 0.000000e+00, 116 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 74 - 0.00000 - - 0s 0 0 0.00000 0 96 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2307 simplex iterations) in 0.42 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 19:20:16 2012 Optimize a model with 8628 rows, 1437 columns and 26290 nonzeros Presolve time: 0.02s Presolved: 8628 rows, 1437 columns, 26290 nonzeros Variable types: 0 continuous, 1437 integer (1437 binary) Root relaxation: objective 0.000000e+00, 132 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 48 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 1s 0 0 0.00000 0 201 - 0.00000 - - 1s 0 0 0.00000 0 102 - 0.00000 - - 2s 0 0 0.00000 0 140 - 0.00000 - - 3s 0 0 0.00000 0 145 - 0.00000 - - 4s 0 0 0.00000 0 185 - 0.00000 - - 5s 0 0 0.00000 0 185 - 0.00000 - - 5s 0 2 0.00000 0 185 - 0.00000 - - 6s 240 12 infeasible 13 - 0.00000 - 122 10s 596 12 infeasible 18 - 0.00000 - 130 15s 901 9 0.00000 17 166 - 0.00000 - 138 20s 1005 23 0.00000 0 134 - 0.00000 - 137 27s 1007 24 0.00000 0 168 - 0.00000 - 137 31s 1009 25 0.00000 0 216 - 0.00000 - 137 35s 1022 28 0.00000 18 172 - 0.00000 - 175 40s 1181 3 infeasible 26 - 0.00000 - 175 45s 1470 15 0.00000 29 138 - 0.00000 - 174 50s Cutting planes: Clique: 43 Zero half: 1 Explored 1698 nodes (328725 simplex iterations) in 54.28 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 19:21:10 2012 Optimize a model with 10342 rows, 1553 columns and 31548 nonzeros Presolve time: 0.03s Presolved: 10342 rows, 1553 columns, 31548 nonzeros Variable types: 0 continuous, 1553 integer (1553 binary) Root relaxation: objective 0.000000e+00, 136 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 38 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1664 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: 10 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:21:11 2012 Optimize a model with 9485 rows, 1495 columns and 28919 nonzeros Presolve time: 0.03s Presolved: 9485 rows, 1495 columns, 28919 nonzeros Variable types: 0 continuous, 1495 integer (1495 binary) Root relaxation: objective 0.000000e+00, 122 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 28 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 1s 0 0 0.00000 0 233 - 0.00000 - - 1s 0 0 0.00000 0 45 - 0.00000 - - 2s 0 0 0.00000 0 18 - 0.00000 - - 2s H 0 0 0.0000000 0.00000 0.0% - 3s Cutting planes: Clique: 6 Zero half: 3 Explored 0 nodes (17722 simplex iterations) in 3.01 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% optimal solution found: number of colors: 11