./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:06:11,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:06:11,885 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:06:11,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:06:11,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:06:11,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:06:11,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:06:11,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:06:11,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:06:11,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:06:11,917 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:06:11,917 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:06:11,918 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:06:11,918 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:06:11,919 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:06:11,919 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:06:11,920 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:06:11,921 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:06:11,921 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:06:11,922 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:06:11,922 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:06:11,923 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:06:11,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:06:11,924 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:06:11,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:06:11,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:06:11,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:06:11,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:06:11,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:06:11,927 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:06:11,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:06:11,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:06:11,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:06:11,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:06:11,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:06:11,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:06:11,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:06:11,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:06:11,929 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:06:11,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:06:11,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:06:11,930 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:06:11,930 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:06:11,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:06:11,931 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2023-12-02 18:06:12,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:06:12,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:06:12,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:06:12,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:06:12,187 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:06:12,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2023-12-02 18:06:14,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:06:15,291 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:06:15,291 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2023-12-02 18:06:15,329 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/data/dbcccde24/474d8653e08149dba1a2c76288c3cf02/FLAGd3ce19dec [2023-12-02 18:06:15,343 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/data/dbcccde24/474d8653e08149dba1a2c76288c3cf02 [2023-12-02 18:06:15,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:06:15,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:06:15,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:06:15,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:06:15,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:06:15,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:06:15" (1/1) ... [2023-12-02 18:06:15,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5760dafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:15, skipping insertion in model container [2023-12-02 18:06:15,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:06:15" (1/1) ... [2023-12-02 18:06:15,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:06:15,728 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2023-12-02 18:06:15,737 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2023-12-02 18:06:16,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,577 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,577 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,578 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,593 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,594 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:16,977 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:06:16,978 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:06:16,979 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:06:16,980 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:06:16,982 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:06:16,983 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:06:16,983 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:06:16,984 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:06:16,985 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:06:16,985 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:06:17,227 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,227 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:06:17,336 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:06:17,347 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2023-12-02 18:06:17,348 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2023-12-02 18:06:17,379 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,380 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,380 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,381 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,381 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,387 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,387 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,388 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,388 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,417 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:06:17,418 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:06:17,419 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:06:17,419 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:06:17,420 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:06:17,420 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:06:17,420 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:06:17,421 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:06:17,421 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:06:17,421 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:06:17,482 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-12-02 18:06:17,484 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,484 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:06:17,493 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-12-02 18:06:17,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:06:17,826 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,827 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,828 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,829 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,829 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:06:17,834 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:06:17,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17 WrapperNode [2023-12-02 18:06:17,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:06:17,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:06:17,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:06:17,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:06:17,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:17,917 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:17,983 INFO L138 Inliner]: procedures = 690, calls = 2669, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 887 [2023-12-02 18:06:17,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:06:17,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:06:17,984 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:06:17,984 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:06:17,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:17,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:17,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:17,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:06:18,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:06:18,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:06:18,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:06:18,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (1/1) ... [2023-12-02 18:06:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:06:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:18,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:06:18,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:06:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-12-02 18:06:18,123 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-12-02 18:06:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-12-02 18:06:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 18:06:18,124 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:06:18,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:06:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-12-02 18:06:18,125 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-12-02 18:06:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:06:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2023-12-02 18:06:18,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2023-12-02 18:06:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:06:18,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:06:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 18:06:18,125 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 18:06:18,125 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-12-02 18:06:18,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-12-02 18:06:18,126 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:06:18,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:06:18,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:06:18,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:06:18,126 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-12-02 18:06:18,126 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-12-02 18:06:18,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:06:18,127 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 18:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 18:06:18,127 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 18:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 18:06:18,127 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2023-12-02 18:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2023-12-02 18:06:18,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:06:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2023-12-02 18:06:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2023-12-02 18:06:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:06:18,360 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:06:18,362 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:06:19,472 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:06:19,680 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:06:19,680 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 18:06:19,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:06:19 BoogieIcfgContainer [2023-12-02 18:06:19,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:06:19,684 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:06:19,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:06:19,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:06:19,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:06:15" (1/3) ... [2023-12-02 18:06:19,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c7530e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:06:19, skipping insertion in model container [2023-12-02 18:06:19,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:06:17" (2/3) ... [2023-12-02 18:06:19,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c7530e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:06:19, skipping insertion in model container [2023-12-02 18:06:19,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:06:19" (3/3) ... [2023-12-02 18:06:19,690 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2023-12-02 18:06:19,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:06:19,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:06:19,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:06:19,766 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fd3361f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:06:19,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:06:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 18:06:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 18:06:19,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:19,783 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:06:19,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:06:19,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1339358585, now seen corresponding path program 1 times [2023-12-02 18:06:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:06:19,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734950758] [2023-12-02 18:06:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:06:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 18:06:35,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:06:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734950758] [2023-12-02 18:06:35,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734950758] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:35,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805468415] [2023-12-02 18:06:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:35,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:35,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:35,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:06:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2f225d-26e0-4b68-a2bd-e9dabc2d694a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:06:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:35,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-02 18:06:35,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:36,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 18:06:36,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 18:06:36,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:06:37,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-12-02 18:06:37,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-12-02 18:06:37,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 1 [2023-12-02 18:06:37,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-12-02 18:06:37,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-12-02 18:06:47,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:06:47,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 5 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 96 case distinctions, treesize of input 298 treesize of output 558 [2023-12-02 18:06:48,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:06:48,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 133 treesize of output 173 [2023-12-02 18:06:48,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-12-02 18:06:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:06:50,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:52,335 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 56951 disjunctions. This might take some time... [2023-12-02 18:10:35,311 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 56951 disjunctions.