test/2022-Invariantloops/src/Main.java

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {

    public static void assertIntEquals(int expected, int result) {
        if (expected != result) {
            throw new Error("Expected: " + expected + ", found: " + result);
        }
    }

    public int loop1() {
        int used1 = 1;
        int used2 = 2;
        int used3 = 3;
        int used4 = 4;
        int invar1 = 15;
        int invar2 = 25;
        int invar3 = 35;
        int invar4 = 45;

        for (int i = 0; i < 10000; i++) {
            used1 += invar1 + invar2;
            used2 -= used1 + invar2 - invar3;
            used3 *= used2 + invar3 * invar4;
            used4 /= used3 + invar1 * invar2 - invar3 + invar4;
        }
        assertIntEquals(used1 + used2 + used3 + used4, -1999709997);
        return used1 + used2 + used3 + used4;
    }

    public static void main(String[] args) {
        int res = new Main().loop1();
    }
}