--slack-level 3 failures

[soonhokong]

1568 - regression_nra_slack_level_3_17.smt2 (Failed)
1580 - regression_nra_slack_level_3_disjunct.smt2 (Failed)
1586 - regression_nra_slack_level_3_ea_beales.smt2 (Failed)
1610 - regression_nra_slack_level_3_fedor_12.smt2 (Failed)
1611 - regression_nra_slack_level_3_fedor_13.smt2 (Failed)
1612 - regression_nra_slack_level_3_fedor_14.smt2 (Failed)
1616 - regression_nra_slack_level_3_hansen_simple.smt2 (Failed)
1629 - regression_nra_slack_level_3_ml.smt2 (Failed)
1635 - regression_nra_slack_level_3_osmosis-backoff.smt2 (Failed)
1636 - regression_nra_slack_level_3_osmosis-bounce-ML5.smt2 (Failed)
1637 - regression_nra_slack_level_3_osmosis-bounce-ML6.smt2 (Failed)
1638 - regression_nra_slack_level_3_osmosis-bounce-ML7.smt2 (Failed)
1639 - regression_nra_slack_level_3_osmosis-bounce-ML8.smt2 (Failed)
1640 - regression_nra_slack_level_3_osmosis-hockey-ML2-d10.smt2 (Failed)
1641 - regression_nra_slack_level_3_osmosis-hockey-ML2.smt2 (Failed)
1642 - regression_nra_slack_level_3_osmosis-hockey-ML3-d10.smt2 (Failed)
1643 - regression_nra_slack_level_3_osmosis-hockey-ML3.smt2 (Failed)
1644 - regression_nra_slack_level_3_osmosis-hockey-ML4-d10.smt2 (Failed)
1645 - regression_nra_slack_level_3_osmosis-hockey-ML4.smt2 (Failed)
1646 - regression_nra_slack_level_3_osmosis-hockey-ML5-d10.smt2 (Failed)
1647 - regression_nra_slack_level_3_osmosis-hockey-ML5.smt2 (Failed)
1649 - regression_nra_slack_level_3_osmosis-simple.smt2 (Failed)
1667 - regression_nra_slack_level_3_tai_sin_03.smt2 (Failed)
1677 - regression_nra_slack_level_3_zenna_04.smt2 (Failed)
1680 - regression_nra_slack_level_3_zenna_09.smt2 (Failed)

[scungao]

Yeah I don't think level 3 will be useful; this should be easy to fix but I'll put it on low priority. Level 1 separates top level linear/nonlinear and should be all we need. Level 2 is introducing too many variables already and should only be useful on special benchmarks.

[soonhokong]

I'll do the following and close this issue:

• [x] delete --slack-level 3 tests
• [x] disallow --slack-level 3 for now. Later, you can enable it.

[scungao]

Great, thanks.