Update scala-smtlib to prevent issues with exceptions while interupting

build.sbt

@@ -143,7 +143,7 @@ def ghProject(repo: String, version: String) = RootProject(uri(s"${repo}#${versi
 
 lazy val bonsai      = ghProject("git://github.com/colder/bonsai.git",     "0fec9f97f4220fa94b1f3f305f2e8b76a3cd1539")
 
-lazy val scalaSmtLib = ghProject("git://github.com/regb/scala-smtlib.git", "204018c3f413fc8191c99ae9ccc4806912e02a83")
+lazy val scalaSmtLib = ghProject("git://github.com/regb/scala-smtlib.git", "3b6ef4992b6af15d08a7320fd12202f35e97b905")
 
 lazy val root = (project in file(".")).
   configs(RegressionTest, IsabelleTest, IntegrTest).