Computer, time evolution path generation method, and time evolution path generation program

A computer that generates a time evolution path representing time evolution of a system in time-series variables, comprising:

• a processor,
• wherein the processor is configured to
• calculate, based on a time evolution model that models the time evolution, a correct statistic that indicates a value that a target statistic based on the variables related to the time evolution path is to take at a target time for the target statistic,
• sample calculation condition parameters designating calculation conditions for the time evolution path from a prior probability distribution of the calculation condition parameters,
• generate a first time evolution path based on the calculation condition parameters sampled from the prior probability distribution and the time evolution model,
• assume a second time evolution path to be newly generated and calculate a posterior probability distribution of the calculation condition parameters in a case where the target statistic based on the first time evolution path and the second time evolution path is the correct statistic,
• sample the calculation condition parameters from the posterior probability distribution such that an error between the correct statistic and the target statistic based on the second time evolution path generated based on the calculation condition parameters sampled from the posterior probability distribution is below a target error, and
• generate the second time evolution path based on the calculation condition parameters sampled from the posterior probability distribution and the time evolution model.