Magento upgrade from 2.2.6 to 2.3.0 fails with composer

[abcpremium]

I was trying to upgrade my Magento shop from 2.2.6 to 2.3.0 via composer. The installation failed with the message "Your requirements could not be resolved to an installable set of packages.". The problem seems to be the symfony/console component?

Preconditions (*)

1. Magento version 2.2.6
2. PHP version 7.1.9
3. Memory limit 768M
4. Max execution time 18000

Steps to reproduce (*)

1. Access the shell and jump to Magento root directory
2. Run "composer require magento/product-community-edition 2.3.0 --no-update"
3. Run "composer update"

Expected result (*)

All packages should be upgraded and all dependencies should be resolved correctly. The Magento upgrade should succeed by running the standard setup:upgrade etc. procedure after the composer update command

Actual result (*)

1. When running composer update the message "Your requirements could not be resolved to an installable set of packages." pops up
2. The actual error message goes on like this:

Problem 1
    - Installation request for magento/product-community-edition 2.3.0 -> satisfiable by magento/product-community-edition[2.3.0].
    - magento/product-community-edition 2.3.0 requires magento/framework 102.0.0 -> satisfiable by magento/framework[102.0.0].
    - Conclusion: don't install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.0-BETA2|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.0-BETA3|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.0|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.1|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.2|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.3|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.4|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.5|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.6|install symfony/console v2.8.38
    - Conclusion: don't install symfony/console v4.1.7|install symfony/console v2.8.38

... another part of the error message is this:

- Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.15].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.16].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.17].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.18].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.19].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.20].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.21].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.22].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.23].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.24].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.25].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.26].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.27].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.28].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.29].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.30].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.31].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.32].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.33].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.34].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.35].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.36].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.37].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.38].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.39].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.40].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.41].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.42].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.3.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.0-BETA2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.4.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.0-BETA2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.5.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.0-BETA2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.6.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.0-BETA2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.15].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.16].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.17].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.18].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.19].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.20].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.21].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.22].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.23].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.24].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.25].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.26].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.27].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.28].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.29].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.30].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.31].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.32].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.33].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.34].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.35].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.36].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.37].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.38].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.39].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.40].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.41].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.42].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.43].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.44].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.45].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.46].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.47].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.48].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.49].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.15].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.16].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.17].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.18].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.19].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.20].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.21].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.22].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.23].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.24].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.25].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.26].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.27].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.28].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.29].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.30].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.31].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.32].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.33].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.34].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.35].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.36].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.37].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.39].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.40].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.41].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.42].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.43].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.44].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.45].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.46].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.47].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.48].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.8.47].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v2.7.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.0.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.1.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.0-RC2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.2.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.15].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.16].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.17].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.18].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.3.9].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-BETA1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-BETA2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-BETA3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-BETA4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-RC1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.0-RC2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.1].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.10].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.11].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.12].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.13].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.14].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.15].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.16].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.17].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.18].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.19].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.2].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.3].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.4].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.5].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.6].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.7].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.8].
    - Can only install one of: symfony/console[v4.1.0-BETA1, v3.4.9].
    - symfony/process v2.3.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.11 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.12 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.13 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.14 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.15 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.16 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.17 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.18 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.19 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.20 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.21 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.22 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.23 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.24 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.25 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.26 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.27 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.28 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.29 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.30 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.31 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.32 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.33 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.34 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.35 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.36 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.37 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.38 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.39 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.40 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.41 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.42 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.3.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.0-BETA1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.0-BETA2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.0-RC1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.4.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.0-BETA1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.0-BETA2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.0-RC1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.11 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.12 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.5.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.0-BETA1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.0-BETA2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.11 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.12 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.13 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.6.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.0-BETA1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.0-BETA2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.11 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.12 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.13 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.14 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.15 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.16 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.17 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.18 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.19 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.20 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.21 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.22 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.23 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.24 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.25 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.26 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.27 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.28 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.29 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.30 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.31 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.32 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.33 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.34 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.35 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.36 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.37 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.38 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.39 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.40 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.41 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.42 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.43 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.44 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.45 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.46 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.47 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.48 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.49 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.7.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.0 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.0-BETA1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.1 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.10 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.11 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.12 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.13 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.14 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.15 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.16 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.17 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.18 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.19 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.2 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.20 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.21 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.22 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.23 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.24 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.25 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.26 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.27 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.28 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.29 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.3 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.30 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.31 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.32 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.33 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.34 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.35 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.36 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.37 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.38 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.39 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.4 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.40 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.41 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.42 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.43 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.44 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.45 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.46 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.47 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.48 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.5 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.6 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.7 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.8 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/process v2.8.9 conflicts with symfony/console[v4.1.0-BETA1].
    - symfony/console v4.1.0-BETA1 conflicts with symfony/process[v2.8.47].
    - magento/framework 102.0.0 requires symfony/console ~4.1.0 -> satisfiable by symfony/console[v4.1.0, v4.1.0-BETA1, v4.1.0-BETA2, v4.1.0-BETA3, v4.1.1, v4.1.2, v4.1.3, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8].
    - Conclusion: don't install symfony/console v4.1.8|install symfony/console v2.8.38
    - Installation request for fabpot/php-cs-fixer ~1.2 -> satisfiable by fabpot/php-cs-fixer[v1.10, v1.10.1, v1.10.2, v1.10.3, v1.11, v1.11.1, v1.11.2, v1.11.3, v1.11.4, v1.11.5, v1.11.6, v1.11.7, v1.11.8, v1.12.0, v1.12.1, v1.12.2, v1.12.3, v1.12.4, v1.13.0, v1.13.1, v1.13.2, v1.13.3, v1.2, v1.3, v1.4, v1.4.1, v1.4.2, v1.5, v1.5.1, v1.5.2, v1.6, v1.6.1, v1.6.2, v1.7, v1.7.1, v1.8, v1.8.1, v1.9, v1.9.1, v1.9.2, v1.9.3].

If you need the complete error message (it is very very very long) just ask.

[magento-engcom-team]

Hi @abcpremium. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento-engcom-team give me $VERSION instance

where $VERSION is version tags (starting from 2.2.0+) or develop branches (for example: 2.3-develop).
For more details, please, review the Magento Contributor Assistant documentation.

@abcpremium do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[abcpremium]

@magento-engcom-team give me 2.2.6 instance

[magento-engcom-team]

Hi @abcpremium. Thank you for your request. I'm working on Magento 2.2.6 instance for you

[magento-engcom-team]

Hi @abcpremium, here is your Magento instance.
Admin access: https://i-19446-2-2-6.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[DanielRuf]

Hi @abcpremium. Thank you for your request. I'm working on Magento 2.2.6 instance for you

Unfortunately you can not test on the CLI using composer with these instances and there is only the update / upgrade wizard (which probably works).

[abcpremium]

Hey @DanielRuf thank you, I realized this right now.

[jcodo]

👍 Also experiencing this issue.

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

  If the issue has a valid description, the label Issue: Format is valid will be added to the issue automatically. Please, edit issue description if needed, until label Issue: Format is valid appears.

• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue. If the report is valid, add Issue: Clear Description label to the issue by yourself.

• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento-engcom-team give me 2.3-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.3-develop branch, please, add the label Reproduced on 2.3.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 5. Verify that the issue is reproducible on 2.2-develop branch.

  Details

  - Add the comment @magento-engcom-team give me 2.2-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.2-develop branch, please add the label Reproduced on 2.2.x

• 6. Add label Issue: Confirmed once verification is complete.

• 7. Make sure that automatic system confirms that report has been added to the backlog.