./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --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 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:47:55,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:47:55,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:47:55,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:47:55,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:47:55,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:47:55,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:47:55,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:47:55,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:47:55,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:47:55,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:47:55,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:47:55,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:47:55,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:47:55,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:47:55,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:47:55,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:47:55,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:47:55,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:47:55,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:47:55,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:47:55,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:47:55,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:47:55,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:47:55,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:47:55,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:47:55,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:47:55,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:47:55,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:47:55,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:47:55,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:47:55,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:47:55,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:47:55,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:47:55,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:47:55,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:47:55,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:47:55,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:47:55,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:47:55,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:47:55,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:47:55,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:47:55,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:47:55,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:47:55,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:47:55,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:47:55,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:47:55,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:47:55,783 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:47:55,783 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:47:55,783 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:47:55,783 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:47:55,783 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:47:55,784 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:47:55,784 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:47:55,784 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:47:55,784 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:47:55,784 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:47:55,785 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:47:55,785 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:47:55,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:47:55,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:47:55,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:47:55,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:47:55,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:47:55,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:47:55,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:47:55,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:47:55,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:47:55,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:47:55,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:47:55,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:47:55,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:47:55,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:47:55,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:47:55,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:47:55,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:47:55,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:47:55,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:47:55,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:47:55,790 INFO L138 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_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2021-11-20 22:47:56,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:47:56,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:47:56,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:47:56,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:47:56,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:47:56,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-11-20 22:47:56,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/data/706820c60/a2627c4df42941319a06c0b2bfec6bf6/FLAG5ed144ff6 [2021-11-20 22:47:57,059 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:47:57,060 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-11-20 22:47:57,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/data/706820c60/a2627c4df42941319a06c0b2bfec6bf6/FLAG5ed144ff6 [2021-11-20 22:47:57,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/data/706820c60/a2627c4df42941319a06c0b2bfec6bf6 [2021-11-20 22:47:57,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:47:57,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:47:57,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:47:57,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:47:57,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:47:57,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:57" (1/1) ... [2021-11-20 22:47:57,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3459a8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:57, skipping insertion in model container [2021-11-20 22:47:57,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:57" (1/1) ... [2021-11-20 22:47:57,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:47:57,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:47:57,928 WARN L230 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_3ebddcc5-2036-4615-90a9-83efa71eb2b8/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-11-20 22:47:57,935 WARN L230 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_3ebddcc5-2036-4615-90a9-83efa71eb2b8/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-11-20 22:47:58,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,952 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,953 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,954 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,955 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,970 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,970 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,972 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:58,973 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:59,353 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:47:59,355 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:47:59,356 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:47:59,357 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:47:59,359 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:47:59,360 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:47:59,360 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:47:59,361 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:47:59,362 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:47:59,362 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:47:59,602 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:47:59,819 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:59,820 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:47:59,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:47:59,935 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:47:59,964 WARN L230 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_3ebddcc5-2036-4615-90a9-83efa71eb2b8/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-11-20 22:47:59,967 WARN L230 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_3ebddcc5-2036-4615-90a9-83efa71eb2b8/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-11-20 22:48:00,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,005 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,005 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,044 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:48:00,045 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:48:00,045 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:48:00,046 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:48:00,047 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:48:00,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:48:00,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:48:00,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:48:00,049 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:48:00,049 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:48:00,104 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:48:00,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:48:00,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:00,546 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:00,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00 WrapperNode [2021-11-20 22:48:00,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:00,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:00,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:00,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:00,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,826 INFO L137 Inliner]: procedures = 691, calls = 2631, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 816 [2021-11-20 22:48:00,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:00,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:00,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:00,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:00,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:00,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:00,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:00,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:00,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (1/1) ... [2021-11-20 22:48:00,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:00,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:00,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:01,037 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 22:48:01,038 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 22:48:01,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:48:01,039 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 22:48:01,039 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 22:48:01,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:48:01,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 22:48:01,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 22:48:01,041 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-20 22:48:01,041 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-20 22:48:01,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:48:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:48:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 22:48:01,042 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 22:48:01,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:48:01,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:48:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:48:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:48:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:48:01,043 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 22:48:01,044 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 22:48:01,044 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-20 22:48:01,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-20 22:48:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 22:48:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 22:48:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:48:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-20 22:48:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-20 22:48:01,045 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-20 22:48:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-20 22:48:01,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:48:01,395 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:01,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:02,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:02,853 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:02,853 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:48:02,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:02 BoogieIcfgContainer [2021-11-20 22:48:02,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:02,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:02,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:02,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:02,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:47:57" (1/3) ... [2021-11-20 22:48:02,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569833e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:02, skipping insertion in model container [2021-11-20 22:48:02,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:00" (2/3) ... [2021-11-20 22:48:02,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569833e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:02, skipping insertion in model container [2021-11-20 22:48:02,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:02" (3/3) ... [2021-11-20 22:48:02,892 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2021-11-20 22:48:02,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:02,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:02,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:02,953 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:48:02,954 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:48:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 22:48:02,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:02,986 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 22:48:02,987 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times [2021-11-20 22:48:03,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:03,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403104049] [2021-11-20 22:48:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:03,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:48:03,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403104049] [2021-11-20 22:48:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403104049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:03,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:48:03,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844490858] [2021-11-20 22:48:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:03,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:48:03,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:03,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:48:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:48:03,780 INFO L87 Difference]: Start difference. First operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:48:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:04,525 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2021-11-20 22:48:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:48:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2021-11-20 22:48:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:04,537 INFO L225 Difference]: With dead ends: 121 [2021-11-20 22:48:04,537 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 22:48:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:48:04,544 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 13 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:04,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 362 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 22:48:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 22:48:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-20 22:48:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 22:48:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-11-20 22:48:04,631 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2021-11-20 22:48:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:04,631 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-11-20 22:48:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 22:48:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-11-20 22:48:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 22:48:04,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:04,635 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 22:48:04,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:48:04,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times [2021-11-20 22:48:04,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:04,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81925444] [2021-11-20 22:48:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:04,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:48:05,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81925444] [2021-11-20 22:48:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81925444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:05,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:05,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 22:48:05,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505924593] [2021-11-20 22:48:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:05,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:48:05,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:48:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:48:05,262 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 22:48:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:07,561 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-11-20 22:48:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:48:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2021-11-20 22:48:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:07,563 INFO L225 Difference]: With dead ends: 96 [2021-11-20 22:48:07,564 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 22:48:07,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:48:07,566 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:07,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 197 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 22:48:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 22:48:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-11-20 22:48:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 22:48:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-11-20 22:48:07,583 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2021-11-20 22:48:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:07,584 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-11-20 22:48:07,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 22:48:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-11-20 22:48:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 22:48:07,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:07,587 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-20 22:48:07,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:48:07,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times [2021-11-20 22:48:07,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:07,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680303638] [2021-11-20 22:48:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:07,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 22:48:08,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680303638] [2021-11-20 22:48:08,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680303638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:08,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:08,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 22:48:08,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265789835] [2021-11-20 22:48:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:08,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:48:08,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:48:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:48:08,730 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 22:48:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:10,629 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-11-20 22:48:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:48:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 44 [2021-11-20 22:48:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:10,633 INFO L225 Difference]: With dead ends: 98 [2021-11-20 22:48:10,633 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 22:48:10,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-20 22:48:10,635 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 35 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:10,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 622 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 22:48:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 22:48:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-11-20 22:48:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-20 22:48:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-11-20 22:48:10,668 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2021-11-20 22:48:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:10,669 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-11-20 22:48:10,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 22:48:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-11-20 22:48:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 22:48:10,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:10,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 22:48:10,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:48:10,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times [2021-11-20 22:48:10,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:10,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037722288] [2021-11-20 22:48:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:10,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:48:11,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037722288] [2021-11-20 22:48:11,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037722288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:11,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:11,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 22:48:11,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660619885] [2021-11-20 22:48:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:11,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:48:11,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:48:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:48:11,085 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 22:48:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:13,088 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-11-20 22:48:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:48:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-20 22:48:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:13,097 INFO L225 Difference]: With dead ends: 107 [2021-11-20 22:48:13,097 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 22:48:13,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:48:13,102 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:13,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 175 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 22:48:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 22:48:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-11-20 22:48:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 22:48:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2021-11-20 22:48:13,131 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 43 [2021-11-20 22:48:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:13,131 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2021-11-20 22:48:13,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 22:48:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2021-11-20 22:48:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 22:48:13,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:13,139 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-11-20 22:48:13,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:48:13,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times [2021-11-20 22:48:13,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:13,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492686656] [2021-11-20 22:48:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:13,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 22:48:13,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492686656] [2021-11-20 22:48:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492686656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:13,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 22:48:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097285319] [2021-11-20 22:48:13,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:48:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:48:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:48:13,718 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:14,992 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2021-11-20 22:48:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:48:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49 [2021-11-20 22:48:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:14,994 INFO L225 Difference]: With dead ends: 111 [2021-11-20 22:48:14,995 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 22:48:14,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:48:14,996 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 432 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 22:48:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 22:48:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-20 22:48:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 22:48:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-11-20 22:48:15,025 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2021-11-20 22:48:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:15,026 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-11-20 22:48:15,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-11-20 22:48:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 22:48:15,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:15,034 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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] [2021-11-20 22:48:15,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:48:15,034 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1351434591, now seen corresponding path program 1 times [2021-11-20 22:48:15,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:15,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549313663] [2021-11-20 22:48:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:15,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 22:48:16,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549313663] [2021-11-20 22:48:16,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549313663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142535624] [2021-11-20 22:48:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:16,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:16,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:16,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebddcc5-2036-4615-90a9-83efa71eb2b8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:48:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 22:48:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 14 [2021-11-20 22:48:22,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:48:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:22,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:22,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:48:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2021-11-20 22:48:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:48:22,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:25,818 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-20 23:01:13,346 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.