Benchmarker: Best score graph is empty (regression)

13:22:45.275 [markThread-1] INFO  VehicleRoutingSolution belgium-n500-k20 has 1 depots, 20 vehicles and 499 customers with a search space of 10^1169.
13:22:45.275 [markThread-1] INFO  Imported: data/vehiclerouting/import/belgium/basic/air/belgium-n500-k20.vrp
13:22:45.306 [markThread-1] INFO  Solving started: time spent (4), best score (-499init/0hard/0soft), environment mode (REPRODUCIBLE), move thread count (NONE), random (JDK with seed 0).
13:22:45.721 [markThread-1] INFO  Construction Heuristic phase (0) ended: time spent (419), best score (0hard/-59547soft), score calculation speed (301472/sec), step total (499).
13:24:45.302 [markThread-1] INFO  Local Search phase (1) ended: time spent (120000), best score (0hard/-55303soft), score calculation speed (150543/sec), step total (45622).
13:24:45.302 [markThread-1] INFO  Solving ended: time spent (120000), best score (0hard/-55303soft), score calculation speed (151057/sec), phase total (2), environment mode (REPRODUCIBLE), move thread count (NONE).
1

<?xml version="1.0" encoding="UTF-8"?>
<plannerBenchmark xmlns="https://www.optaplanner.org/xsd/benchmark" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="https://www.optaplanner.org/xsd/benchmark https://www.optaplanner.org/xsd/benchmark/benchmark.xsd">
  <benchmarkDirectory>local/data/general</benchmarkDirectory>
  <warmUpMinutesSpentLimit>1</warmUpMinutesSpentLimit>

  <inheritedSolverBenchmark>
    <solver>
      <termination>
        <minutesSpentLimit>2</minutesSpentLimit>
      </termination>
    </solver>
  </inheritedSolverBenchmark>

  <solverBenchmark>
    <name>NQueens</name>
    <solver>
      <solutionClass>org.optaplanner.examples.nqueens.domain.NQueens</solutionClass>
      <entityClass>org.optaplanner.examples.nqueens.domain.Queen</entityClass>
      <scoreDirectorFactory>
        <constraintProviderClass>org.optaplanner.examples.nqueens.score.NQueensConstraintProvider</constraintProviderClass>
        <initializingScoreTrend>ONLY_DOWN</initializingScoreTrend>
      </scoreDirectorFactory>
    </solver>
    <problemBenchmarks>
      <solutionFileIOClass>org.optaplanner.examples.nqueens.persistence.NQueensXmlSolutionFileIO</solutionFileIOClass>
      <inputSolutionFile>data/nqueens/unsolved/256queens.xml</inputSolutionFile>
    </problemBenchmarks>
  </solverBenchmark>
  <solverBenchmark>
    <name>VRP</name>
    <solver>
      <solutionClass>org.optaplanner.examples.vehiclerouting.domain.VehicleRoutingSolution</solutionClass>
      <entityClass>org.optaplanner.examples.vehiclerouting.domain.Standstill</entityClass>
      <entityClass>org.optaplanner.examples.vehiclerouting.domain.Customer</entityClass>
      <entityClass>org.optaplanner.examples.vehiclerouting.domain.timewindowed.TimeWindowedCustomer</entityClass>
      <scoreDirectorFactory>
        <constraintProviderClass>org.optaplanner.examples.vehiclerouting.score.VehicleRoutingConstraintProvider</constraintProviderClass>
        <initializingScoreTrend>ONLY_DOWN</initializingScoreTrend>
      </scoreDirectorFactory>
    </solver>
    <problemBenchmarks>
      <solutionFileIOClass>org.optaplanner.examples.vehiclerouting.persistence.VehicleRoutingFileIO</solutionFileIOClass>
      <inputSolutionFile>data/vehiclerouting/import/belgium/basic/air/belgium-n500-k20.vrp</inputSolutionFile>
    </problemBenchmarks>
  </solverBenchmark>
</plannerBenchmark>