current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:57 2012 Optimize a model with 16076 rows, 1916 columns and 49350 nonzeros Presolve time: 0.06s Presolved: 16076 rows, 1916 columns, 49350 nonzeros Variable types: 0 continuous, 1916 integer (1916 binary) Root relaxation: objective 0.000000e+00, 117 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 (550 simplex iterations) in 0.12 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:58 2012 Optimize a model with 7743 rows, 1253 columns and 23688 nonzeros Presolve time: 0.02s Presolved: 7743 rows, 1253 columns, 23688 nonzeros Variable types: 0 continuous, 1253 integer (1253 binary) Root relaxation: objective 0.000000e+00, 106 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 17 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1175 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:58 2012 Optimize a model with 3897 rows, 947 columns and 11844 nonzeros Presolve time: 0.01s Presolved: 3897 rows, 947 columns, 11844 nonzeros Variable types: 0 continuous, 947 integer (947 binary) Root relaxation: objective 0.000000e+00, 108 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 0 102 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1824 simplex iterations) in 0.33 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:58 2012 Optimize a model with 5820 rows, 1100 columns and 17766 nonzeros Presolve time: 0.02s Presolved: 5820 rows, 1100 columns, 17766 nonzeros Variable types: 0 continuous, 1100 integer (1100 binary) Root relaxation: objective 0.000000e+00, 116 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 57 - 0.00000 - - 0s 0 0 0.00000 0 105 - 0.00000 - - 0s 0 0 0.00000 0 199 - 0.00000 - - 0s 0 0 0.00000 0 84 - 0.00000 - - 1s 0 0 0.00000 0 26 - 0.00000 - - 2s 0 0 0.00000 0 18 - 0.00000 - - 2s 0 0 0.00000 0 228 - 0.00000 - - 2s 0 0 0.00000 0 199 - 0.00000 - - 3s 0 0 0.00000 0 197 - 0.00000 - - 4s 0 0 0.00000 0 109 - 0.00000 - - 4s 0 0 0.00000 0 172 - 0.00000 - - 5s 0 0 0.00000 0 130 - 0.00000 - - 5s 0 0 0.00000 0 42 - 0.00000 - - 6s 0 0 0.00000 0 55 - 0.00000 - - 6s 0 0 0.00000 0 24 - 0.00000 - - 7s 0 0 0.00000 0 197 - 0.00000 - - 7s 0 0 0.00000 0 22 - 0.00000 - - 8s 0 2 0.00000 0 22 - 0.00000 - - 9s 1 4 0.00000 1 167 - 0.00000 - 898 10s Cutting planes: Clique: 59 Zero half: 3 Explored 288 nodes (92927 simplex iterations) in 14.01 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: 9 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:18:12 2012 Optimize a model with 6461 rows, 1151 columns and 19740 nonzeros Presolve time: 0.02s Presolved: 6461 rows, 1151 columns, 19740 nonzeros Variable types: 0 continuous, 1151 integer (1151 binary) Root relaxation: objective 0.000000e+00, 116 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 34 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 109 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 39 Zero half: 18 Explored 0 nodes (7285 simplex iterations) in 1.02 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: 10