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Error in instrumented process when Fuzzing a recursive class #2545

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@alisevych

Description

@alisevych

Description

Error in instrumented process when Fuzzing IR method in Unit tests

To Reproduce

  1. Install UnitTestBot plugin built from main in IntelliJ IDEA
  2. Open UTBotJava project
  3. Set Fuzzing 100% mode //not strictly necessary
  4. Generate tests for Recursion class in utbot-sample

Expected behavior

No errors in instrumented process are expected.
Class is expected to be correctly instantiated and methods executed.

Actual behavior

There is error report with 11K-20K occurrences of Default concrete execution failed
for every method under test

Screenshots, logs

public final class RecursionTest {
    ///region Test suites for executable org.utbot.examples.recursion.Recursion.fib

    ///region Errors report for fib

    public void testFib_errors() {
        // Couldn't generate some tests. List of errors:
        // 
        // 11099 occurrences of:
        // Default concrete execution failed

    }
    ///endregion

    ///endregion

Environment

IntelliJ IDEA version - 2023.2 Ultimate
Project - Maven/Gradle
JDK - 1.8/17

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