current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:24 2012 Optimize a model with 20008 rows, 2224 columns and 61344 nonzeros Presolve time: 0.08s Presolved: 20008 rows, 2224 columns, 61344 nonzeros Variable types: 0 continuous, 2224 integer (2224 binary) Root relaxation: objective 0.000000e+00, 123 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 (549 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% current bounds on the number of colors: 0 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:25 2012 Optimize a model with 9662 rows, 1454 columns and 29536 nonzeros Presolve time: 0.03s Presolved: 9662 rows, 1454 columns, 29536 nonzeros Variable types: 0 continuous, 1454 integer (1454 binary) Root relaxation: objective 0.000000e+00, 120 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 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1695 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:25 2012 Optimize a model with 4489 rows, 1069 columns and 13632 nonzeros Presolve time: 0.01s Presolved: 4489 rows, 1069 columns, 13632 nonzeros Variable types: 0 continuous, 1069 integer (1069 binary) Root relaxation: objective 0.000000e+00, 110 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 92 - 0.00000 - - 0s 0 0 0.00000 0 108 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2121 simplex iterations) in 0.36 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:25 2012 Optimize a model with 6706 rows, 1234 columns and 20448 nonzeros Presolve time: 0.02s Presolved: 6706 rows, 1234 columns, 20448 nonzeros Variable types: 0 continuous, 1234 integer (1234 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 58 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 1s 0 0 0.00000 0 145 - 0.00000 - - 2s 0 0 0.00000 0 152 - 0.00000 - - 3s 0 0 0.00000 0 179 - 0.00000 - - 3s 0 0 0.00000 0 201 - 0.00000 - - 4s 0 0 0.00000 0 201 - 0.00000 - - 5s 0 2 0.00000 0 201 - 0.00000 - - 5s Cutting planes: Clique: 123 Explored 133 nodes (55194 simplex iterations) in 8.95 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:34 2012 Optimize a model with 8184 rows, 1344 columns and 24992 nonzeros Presolve time: 0.02s Presolved: 8184 rows, 1344 columns, 24992 nonzeros Variable types: 0 continuous, 1344 integer (1344 binary) Root relaxation: objective 0.000000e+00, 117 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 0 0 0.00000 0 57 - 0.00000 - - 0s Cutting planes: Clique: 10 Explored 0 nodes (2362 simplex iterations) in 0.26 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:42:35 2012 Optimize a model with 7445 rows, 1289 columns and 22720 nonzeros Presolve time: 0.02s Presolved: 7445 rows, 1289 columns, 22720 nonzeros Variable types: 0 continuous, 1289 integer (1289 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 64 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 0s 0 0 0.00000 0 113 - 0.00000 - - 1s 0 0 0.00000 0 185 - 0.00000 - - 1s 0 0 0.00000 0 130 - 0.00000 - - 1s 0 0 0.00000 0 195 - 0.00000 - - 2s 0 0 0.00000 0 200 - 0.00000 - - 3s 0 0 0.00000 0 153 - 0.00000 - - 4s 0 0 0.00000 0 94 - 0.00000 - - 4s 0 0 0.00000 0 142 - 0.00000 - - 5s 0 0 0.00000 0 142 - 0.00000 - - 6s 0 2 0.00000 0 142 - 0.00000 - - 7s 203 11 0.00000 13 124 - 0.00000 - 86.8 10s 605 25 0.00000 20 136 - 0.00000 - 83.2 15s 609 27 0.00000 5 215 - 0.00000 - 82.7 20s 707 11 0.00000 23 102 - 0.00000 - 139 25s * 772 3 33 0.0000000 0.00000 0.0% 139 25s Cutting planes: Clique: 10 Zero half: 1 Explored 773 nodes (139960 simplex iterations) in 25.72 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