diff --git a/Cargo.lock b/Cargo.lock
index 642469c..608fdd7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,12 +4,12 @@ version = 3
 
 [[package]]
 name = "aluvm"
-version = "0.10.6"
+version = "0.11.0-beta.1"
 dependencies = [
  "amplify",
  "baid58",
  "curve25519-dalek",
- "getrandom 0.2.10",
+ "getrandom 0.2.11",
  "half",
  "paste",
  "rand",
@@ -125,9 +125,9 @@ checksum = "6107fe1be6682a68940da878d9e9f5e90ca5745b3dec9fd1bb393c8777d4f581"
 
 [[package]]
 name = "base64"
-version = "0.21.4"
+version = "0.21.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
+checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
 
 [[package]]
 name = "bitflags"
@@ -202,9 +202,9 @@ checksum = "f7144d30dcf0fafbce74250a3963025d8d52177934239851c917d29f1df280c2"
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.9"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
+checksum = "ce420fe07aecd3e67c5f910618fe65e94158f6dcc0adf44e00d69ce2bdfe0fd0"
 dependencies = [
  "libc",
 ]
@@ -286,9 +286,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.10"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
+checksum = "fe9006bed769170c11f845cf00c7c1e9092aeb3f268e007c3e760ac68008070f"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -308,9 +308,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.14.1"
+version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dfda62a12f55daeae5015f81b0baea145391cb4520f86c248fc615d72640d12"
+checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
 
 [[package]]
 name = "heck"
@@ -320,9 +320,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "indexmap"
-version = "2.0.2"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8adf3ddd720272c6ea8bf59463c04e0f93d0bbf7c5439b691bca2987e0270897"
+checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -336,9 +336,9 @@ checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
 
 [[package]]
 name = "js-sys"
-version = "0.3.64"
+version = "0.3.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c5f195fe497f702db0f318b07fdd68edb16955aed830df8363d837542f8f935a"
+checksum = "54c0c35952f67de54bb584e9fd912b3023117cbafc0a77d8f3dee1fb5f572fe8"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -351,9 +351,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.149"
+version = "0.2.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
+checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
 
 [[package]]
 name = "log"
@@ -449,7 +449,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom 0.2.10",
+ "getrandom 0.2.11",
 ]
 
 [[package]]
@@ -475,47 +475,47 @@ checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
 
 [[package]]
 name = "secp256k1"
-version = "0.27.0"
+version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25996b82292a7a57ed3508f052cfff8640d38d32018784acd714758b43da9c8f"
+checksum = "2acea373acb8c21ecb5a23741452acd2593ed44ee3d343e72baaa143bc89d0d5"
 dependencies = [
  "secp256k1-sys",
 ]
 
 [[package]]
 name = "secp256k1-sys"
-version = "0.8.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70a129b9e9efbfb223753b9163c4ab3b13cff7fd9c7f010fbac25ab4099fa07e"
+checksum = "09e67c467c38fd24bd5499dc9a18183b31575c12ee549197e3e20d57aa4fe3b7"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "serde"
-version = "1.0.188"
+version = "1.0.192"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf9e0fcba69a370eed61bcf2b728575f726b50b55cba78064753d708ddc7549e"
+checksum = "bca2a08484b285dcb282d0f67b26cadc0df8b19f8c12502c13d966bf9482f001"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.188"
+version = "1.0.192"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
+checksum = "d6c7207fbec9faa48073f3e3074cbe553af6ea512d7c21ba46e434e70ea9fbc1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.38",
+ "syn 2.0.39",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.107"
+version = "1.0.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b420ce6e3d8bd882e9b243c6eed35dbc9a6110c9769e74b584e0d68d1f20c65"
+checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
 dependencies = [
  "itoa",
  "ryu",
@@ -524,9 +524,9 @@ dependencies = [
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96426c9936fd7a0124915f9185ea1d20aa9445cc9821142f0a73bc9207a2e186"
+checksum = "12022b835073e5b11e90a14f86838ceb1c8fb0325b72416845c487ac0fa95e80"
 dependencies = [
  "serde",
 ]
@@ -543,9 +543,9 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.9.25"
+version = "0.9.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a49e178e4452f45cb61d0cd8cebc1b0fafd3e41929e996cef79aa3aca91f574"
+checksum = "3cc7a1570e38322cfe4154732e5110f887ea57e22b76f4bfd32b5bdd3368666c"
 dependencies = [
  "indexmap",
  "itoa",
@@ -633,9 +633,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.38"
+version = "2.0.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e96b79aaa137db8f61e26363a0c9b47d8b4ec75da28b7d1d614c2303e232408b"
+checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -644,9 +644,9 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.8.2"
+version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "185d8ab0dfbb35cf1399a6344d8484209c088f75f8f68230da55d48d95d43e3d"
+checksum = "a1a195ec8c9da26928f773888e0742ca3ca1040c6cd859c919c9f59c1954ab35"
 dependencies = [
  "serde",
  "serde_spanned",
@@ -656,18 +656,18 @@ dependencies = [
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.3"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cda73e2f1397b1262d6dfdcef8aafae14d1de7748d66822d3bfeeb6d03e5e4b"
+checksum = "3550f4e9685620ac18a50ed434eb3aec30db8ba93b0287467bca5826ea25baf1"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "toml_edit"
-version = "0.20.2"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
+checksum = "d34d383cd00a163b4a5b85053df514d45bc330f6de7737edfe0a93311d1eaa03"
 dependencies = [
  "indexmap",
  "serde",
@@ -714,9 +714,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.87"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7706a72ab36d8cb1f80ffbf0e071533974a60d0a308d01a5d0375bf60499a342"
+checksum = "7daec296f25a1bae309c0cd5c29c4b260e510e6d813c286b19eaadf409d40fce"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
@@ -724,24 +724,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.87"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ef2b6d3c510e9625e5fe6f509ab07d66a760f0885d858736483c32ed7809abd"
+checksum = "e397f4664c0e4e428e8313a469aaa58310d302159845980fd23b0f22a847f217"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.38",
+ "syn 2.0.39",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.37"
+version = "0.4.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c02dbc21516f9f1f04f187958890d7e6026df8d16540b7ad9492bc34a67cea03"
+checksum = "9afec9963e3d0994cac82455b2b3502b81a7f40f9a0d32181f7528d9f4b43e02"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -751,9 +751,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.87"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dee495e55982a3bd48105a7b947fd2a9b4a8ae3010041b9e0faab3f9cd028f1d"
+checksum = "5961017b3b08ad5f3fe39f1e79877f8ee7c23c5e5fd5eb80de95abc41f1f16b2"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -761,28 +761,28 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.87"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
+checksum = "c5353b8dab669f5e10f5bd76df26a9360c748f054f862ff5f3f8aae0c7fb3907"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.38",
+ "syn 2.0.39",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.87"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
+checksum = "0d046c5d029ba91a1ed14da14dca44b68bf2f124cfbaf741c54151fdb3e0750b"
 
 [[package]]
 name = "wasm-bindgen-test"
-version = "0.3.37"
+version = "0.3.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e6e302a7ea94f83a6d09e78e7dc7d9ca7b186bc2829c24a22d0753efd680671"
+checksum = "c6433b7c56db97397842c46b67e11873eda263170afeb3a2dc74a7cb370fee0d"
 dependencies = [
  "console_error_panic_hook",
  "js-sys",
@@ -794,19 +794,20 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-test-macro"
-version = "0.3.37"
+version = "0.3.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ecb993dd8c836930ed130e020e77d9b2e65dd0fbab1b67c790b0f5d80b11a575"
+checksum = "493fcbab756bb764fa37e6bee8cec2dd709eb4273d06d0c282a5e74275ded735"
 dependencies = [
  "proc-macro2",
  "quote",
+ "syn 2.0.39",
 ]
 
 [[package]]
 name = "web-sys"
-version = "0.3.64"
+version = "0.3.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b85cbef8c220a6abc02aefd892dfc0fc23afb1c6a426316ec33253a3877249b"
+checksum = "5db499c5f66323272151db0e666cd34f78617522fb0c1604d31a27c50c206a85"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -814,9 +815,9 @@ dependencies = [
 
 [[package]]
 name = "winnow"
-version = "0.5.16"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "037711d82167854aff2018dfd193aa0fef5370f456732f0d5a0c59b0f1b4b907"
+checksum = "829846f3e3db426d4cee4510841b71a8e58aa2a76b1132579487ae430ccd9c7b"
 dependencies = [
  "memchr",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 760f062..8ff4836 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "aluvm"
 description = "Functional registry-based RISC virtual machine"
-version = "0.10.6"
+version = "0.11.0-beta.1"
 authors = ["Dr Maxim Orlovsky <orlovsky@ubideco.org>"]
 repository = "https://github.com/aluvm/rust-aluvm"
 homepage = "https://aluvm.org"
@@ -28,7 +28,7 @@ strict_types = { version = "1.6.3", optional = true }
 sha2 = "0.10.8"
 ripemd = "0.1.3"
 baid58 = "0.4.4"
-secp256k1 = { version = "0.27.0", optional = true, features = ["global-context"] }
+secp256k1 = { version = "0.28.0", optional = true, features = ["global-context"] }
 curve25519-dalek = { version = "3.2", optional = true }
 half = "~2.2.0" # Required to maintain MSRV
 serde_crate = { package = "serde", version = "1", optional = true }
diff --git a/src/isa/exec.rs b/src/isa/exec.rs
index 4d8bfb7..6555dc2 100644
--- a/src/isa/exec.rs
+++ b/src/isa/exec.rs
@@ -113,6 +113,7 @@ where
         set.extend(DigestOp::isa_ids());
         set.extend(Secp256k1Op::isa_ids());
         set.extend(Curve25519Op::isa_ids());
+        set.extend(Extension::isa_ids());
         set
     }
 
diff --git a/src/library/lib.rs b/src/library/lib.rs
index f124fa9..4aaaaa4 100644
--- a/src/library/lib.rs
+++ b/src/library/lib.rs
@@ -293,28 +293,32 @@ impl Lib {
             let next = instr.exec(registers, LibSite::with(pos, lib_hash), context);
 
             #[cfg(all(debug_assertions, feature = "std"))]
-            eprint!("\n@{:06}> {:48}; st0={}", pos, instr, registers.st0);
+            eprint!("@{:06}> {}; st0={}", pos, instr, registers.st0);
 
             if !registers.acc_complexity(instr) {
                 #[cfg(all(debug_assertions, feature = "std"))]
-                eprintln!();
+                eprintln!(" -> complexity overflow");
                 return None;
             }
             match next {
                 ExecStep::Stop => {
                     #[cfg(all(debug_assertions, feature = "std"))]
-                    eprintln!();
+                    eprintln!(" -> execution stopped");
                     return None;
                 }
-                ExecStep::Next => continue,
+                ExecStep::Next => {
+                    #[cfg(all(debug_assertions, feature = "std"))]
+                    eprintln!();
+                    continue;
+                }
                 ExecStep::Jump(pos) => {
                     #[cfg(all(debug_assertions, feature = "std"))]
-                    eprint!(" -> {}", pos);
+                    eprintln!(" -> {}", pos);
                     cursor.seek(pos).ok()?;
                 }
                 ExecStep::Call(site) => {
                     #[cfg(all(debug_assertions, feature = "std"))]
-                    eprint!(" -> {}", site);
+                    eprintln!(" -> {}", site);
                     return Some(site);
                 }
             }
diff --git a/src/reg/core_regs.rs b/src/reg/core_regs.rs
index fbfadf0..0c1c6ac 100644
--- a/src/reg/core_regs.rs
+++ b/src/reg/core_regs.rs
@@ -441,6 +441,13 @@ impl CoreRegs {
     /// Returns vale of `st0` register
     #[inline]
     pub fn status(&self) -> bool { self.st0 }
+
+    /// Set `st0` value to `false`.
+    pub fn set_failure(&mut self) -> bool {
+        let status = self.st0;
+        self.st0 = false;
+        status
+    }
 }
 
 impl Debug for CoreRegs {