A non-transitory computer-readable storage medium storing a prediction program that causes a computer to execute a process includes storing accumulated information in a storage unit, in association with a task having previously occurred, the task being a process that needs work performed by an operator, from among a plurality of operation processes executed by an information processing apparatus, the accumulated information including a status information on the information processing apparatus obtained at a time of execution of a determination process from which subsequent processes branch depending on a determination result and which is executed before the task, and a branching result of the determination process and predicting whether the task is to occur after a predetermined timing based on the status information on the information processing apparatus obtained at the predetermined timing and the accumulated information.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A non-transitory computer-readable storage medium storing a prediction program that causes a computer to execute a process comprising: storing accumulated information in a storage unit, in association with a task having previously occurred, the task being a process that needs work performed by an operator, from among a plurality of operation processes executed by an information processing apparatus, the accumulated information including a status information on the information processing apparatus obtained at a time of execution of a determination process from which subsequent processes branch depending on a determination result and which is executed before a task to be predicted, and a branching result of the determination process; and predicting whether the task is to occur after a predetermined timing based on the status information on the information processing apparatus obtained at the predetermined timing and the accumulated information. 2. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, wherein the predetermined timing is an operation start time of an operator who has a possibility of performing a task within an operation time. 3. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, wherein the prediction process is executed every predetermined time. 4. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, wherein the status information on the information processing apparatus obtained at the time of execution of the determination process has a first free space in the storage medium of the information processing apparatus. 5. The non-transitory computer-readable storage medium storing a prediction program according to claim 4, wherein the storage process further stores, in the storage unit, the accumulated information resulting from association, with the task, a second free space in the storage medium present a predetermined time before the time of execution of the determination process, the prediction process determines a first value including a mean value of first free spaces stored in the accumulated information determined to be abnormal, and a second value including a mean value of values for a change in free space per unit time based on a difference between the first free space and the second free space corresponding to the first free space, the prediction process determines, in a graph in which an axis of abscissas represents time and an axis of ordinate represents the free space in the storage medium, a first line passing the first value at the time of execution of the determination process and having a gradient of the second value, and the prediction process predicts that a determination of the determination process executed after the predetermined timing is abnormal when a value of a third free space in the storage medium present at the predetermined timing is less than a value on the first line corresponding to the predetermined timing, and predicts whether the task is to occur based on the prediction. 6. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, wherein the storage process performs storage of the accumulated information for a determination process that is executed immediately before the task. 7. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, further comprising: excluding, from among execution routes corresponding to an order of execution of the operation processes possibly executed by the information processing apparatus, an execution route which is passed when the branching result of the determination process is abnormal; wherein the prediction process performs prediction of whether the task is to occur, on the execution route that has not been excluded. 8. The non-transitory computer-readable storage medium storing a prediction program according to claim 7, further comprising a selection process of selecting, when a plurality of the execution routes has not been excluded by the exclusion process, a single execution route of the plurality of execution routes which meets a predetermined condition, wherein the prediction process performs prediction of whether the task is to occur, on the execution route selected by the selection process. 9. The non-transitory computer-readable storage medium storing a prediction program according to claim 8, wherein the selection process determines an order of development of the plurality of execution routes that has not been excluded by the exclusion process based on an order of development of the plurality of operation processes, and selects an execution route with an oldest development as an execution route meeting the predetermined condition. 10. The non-transitory computer-readable storage medium storing a prediction program according to claim 1, further comprising: predicting a timing when the task is to occur by calculating a sum of processing times of the operation processes executed before the task. 11. The non-transitory computer-readable storage medium storing a prediction program according to claim 10, further comprising: storing the processing time of the executed operation process; wherein the prediction process calculates the sum of the processing times based on the processing times of the operation processes. 12. A prediction apparatus comprising: a storage configured to store accumulated information in a storage unit, in association with a task having previously occurred, the task being a process that needs work performed by an operator, from among a plurality of operation processes executed by an information processing apparatus, the accumulated information including a status information on the information processing apparatus obtained at a time of execution of a determination process from which subsequent processes branch depending on a determination result and which is executed before a task to be predicted, and a branching result of the determination process; and a prediction unit configured to predict whether the task is to occur after a predetermined timing based on the status information on the information processing apparatus obtained at the predetermined timing and the accumulated information. 13. A prediction method comprising: storing accumulated information in a storage unit, in association with a task having previously occurred, the task being a process that needs work performed by an operator, from among a plurality of operation processes executed by an information processing apparatus, the accumulated information including a status information on the information processing apparatus obtained at a time of execution of a determination process from which subsequent processes branch depending on a determination result and which is executed before a task to be predicted, and a branching result of the determination process; and predicting whether the task is to occur after a predetermined timing based on the status information on the information processing apparatus obtained at the predetermined timing and the accumulated information.