fixing bitvector bugs

* clauses shouldn't be erased when they could be a reason for outside propagation
* propagation of p and !p is ignored as this must lead to a conflict in the subtheory internally

1 files changed, 69 insertions, 0 deletions

diff --git a/test/regress/regress0/bv/fuzz16.delta01.smt b/test/regress/regress0/bv/fuzz16.delta01.smt
new file mode 100644
index 000000000..c9fef69de
--- /dev/null
+++ b/test/regress/regress0/bv/fuzz16.delta01.smt
@@ -0,0 +1,69 @@
+(benchmark fuzzsmt
+:logic QF_BV
+:extrafuns ((v1 BitVec[12]))
+:extrafuns ((v15 BitVec[8]))
+:extrafuns ((v11 BitVec[12]))
+:extrafuns ((v12 BitVec[15]))
+:status unsat
+:formula
+(flet ($n1 true)
+(let (?n2 bv0[12])
+(flet ($n3 (bvslt ?n2 v1))
+(flet ($n4 (not $n3))
+(let (?n5 bv0[1])
+(let (?n6 bv1[1])
+(let (?n7 bv1[12])
+(flet ($n8 (bvult v11 ?n7))
+(let (?n9 (ite $n8 ?n6 ?n5))
+(flet ($n10 (= ?n6 ?n9))
+(let (?n11 (ite $n10 v11 ?n2))
+(let (?n12 (sign_extend[3] ?n11))
+(flet ($n13 (bvult ?n12 v12))
+(let (?n14 (ite $n13 ?n6 ?n5))
+(flet ($n15 (bvult ?n5 ?n14))
+(flet ($n16 (not $n15))
+(let (?n17 bv0[5])
+(let (?n18 (sign_extend[1] v1))
+(let (?n19 (sign_extend[2] ?n18))
+(let (?n20 (bvxnor v12 ?n19))
+(flet ($n21 (bvult ?n19 ?n20))
+(let (?n22 (ite $n21 ?n6 ?n5))
+(let (?n23 (repeat[5] ?n22))
+(flet ($n24 (bvult ?n17 ?n23))
+(let (?n25 bv0[10])
+(let (?n26 bv0[15])
+(flet ($n27 (bvsge ?n20 ?n26))
+(let (?n28 (ite $n27 ?n6 ?n5))
+(let (?n29 (sign_extend[9] ?n28))
+(flet ($n30 (= ?n25 ?n29))
+(let (?n31 bv1[14])
+(flet ($n32 (bvult ?n22 ?n6))
+(let (?n33 (ite $n32 ?n6 ?n5))
+(let (?n34 (zero_extend[13] ?n33))
+(let (?n35 (bvadd ?n31 ?n34))
+(let (?n36 bv0[14])
+(flet ($n37 (bvugt ?n35 ?n36))
+(flet ($n38 false)
+(let (?n39 bv1[15])
+(let (?n40 (zero_extend[4] v15))
+(let (?n41 (bvcomp v11 ?n40))
+(let (?n42 (zero_extend[14] ?n41))
+(flet ($n43 (distinct ?n39 ?n42))
+(let (?n44 (ite $n43 ?n6 ?n5))
+(let (?n45 (sign_extend[11] ?n44))
+(let (?n46 (bvxor v1 ?n45))
+(flet ($n47 (bvsgt ?n2 ?n46))
+(let (?n48 (zero_extend[12] ?n44))
+(let (?n49 bv0[13])
+(flet ($n50 (bvule ?n48 ?n49))
+(flet ($n51 (or $n38 $n47 $n50))
+(flet ($n52 (bvsle ?n2 v1))
+(let (?n53 (ite $n52 ?n6 ?n5))
+(let (?n54 (bvadd ?n6 ?n53))
+(flet ($n55 (bvugt ?n54 ?n5))
+(let (?n56 (ite $n55 ?n6 ?n5))
+(let (?n57 (sign_extend[14] ?n56))
+(flet ($n58 (bvuge ?n57 ?n39))
+(flet ($n59 (and $n4 $n16 $n24 $n30 $n37 $n51 $n58))
+$n59
+))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))