Iteration final - SOLVER_EXECUTION
Sequence: 6
Timestamp: 2025-07-28 00:21:27

Prompt:
Generated solver codes with templates and executed them with retry logic

Response:
{
  "gurobipy": {
    "solver_type": "gurobipy",
    "execution_time": 0.18777251243591309,
    "return_code": 0,
    "stdout": "Restricted license - for non-production use only - expires 2026-11-23\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nOptimize a model with 6 rows, 5 columns and 10 nonzeros\nModel fingerprint: 0xdf2722fa\nVariable types: 0 continuous, 5 integer (5 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 1e+00]\n  Objective range  [1e+02, 2e+02]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [2e+00, 2e+00]\nFound heuristic solution: objective 900.0000000\n\nExplored 0 nodes (0 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 1 (of 128 available processors)\n\nSolution count 1: 900 \n\nOptimal solution found (tolerance 1.00e-04)\nBest objective 9.000000000000e+02, best bound 9.000000000000e+02, gap 0.0000%\nOptimal value: 900.0\nJournalist 1 covers Event 1\nJournalist 1 covers Event 2\nJournalist 2 covers Event 2\nJournalist 2 covers Event 3\nJournalist 3 covers Event 1\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 900.0,
    "error_message": null,
    "decision_variables": {}
  },
  "docplex": {
    "solver_type": "docplex",
    "execution_time": 2.1632068157196045,
    "return_code": 0,
    "stdout": "Optimal value: 900.0\nx[1,1] = 1.000\nx[1,2] = 1.000\nx[2,2] = 1.000\nx[2,3] = 1.000\nx[3,1] = 1.000\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 900.0,
    "error_message": null,
    "decision_variables": {}
  },
  "pyomo": {
    "solver_type": "pyomo",
    "execution_time": 2.0060412883758545,
    "return_code": 0,
    "stdout": "Read LP format model from file /tmp/tmpbmp2ojp3.pyomo.lp\nReading time = 0.00 seconds\nx1: 6 rows, 9 columns, 18 nonzeros\nSet parameter TimeLimit to value 300\nSet parameter MIPGap to value 0.01\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nNon-default parameters:\nTimeLimit  300\nMIPGap  0.01\n\nOptimize a model with 6 rows, 9 columns and 18 nonzeros\nModel fingerprint: 0x85bda3ab\nVariable types: 0 continuous, 9 integer (9 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 1e+00]\n  Objective range  [1e+02, 2e+02]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [2e+00, 2e+00]\nFound heuristic solution: objective 900.0000000\nPresolve time: 0.00s\nPresolved: 6 rows, 9 columns, 18 nonzeros\nVariable types: 0 continuous, 9 integer (9 binary)\n\nRoot relaxation: objective 1.000000e+03, 4 iterations, 0.00 seconds (0.00 work units)\n\n    Nodes    |    Current Node    |     Objective Bounds      |     Work\n Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time\n\n*    0     0               0    1000.0000000 1000.00000  0.00%     -    0s\n\nExplored 1 nodes (4 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 32 (of 128 available processors)\n\nSolution count 2: 1000 900 \n\nOptimal solution found (tolerance 1.00e-02)\nBest objective 1.000000000000e+03, best bound 1.000000000000e+03, gap 0.0000%\nOptimal solution found!\nOptimal value: 1000.0\n\nAssignment of journalists to events:\nJournalist 1 covers Event 1\nJournalist 1 covers Event 2\nJournalist 2 covers Event 1\nJournalist 2 covers Event 3\nJournalist 3 covers Event 2\nJournalist 3 covers Event 3\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 1000.0,
    "error_message": null,
    "decision_variables": {}
  }
}
