./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba --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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:18:37,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:18:37,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:18:37,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:18:37,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:18:37,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:18:37,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:18:37,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:18:37,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:18:37,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:18:37,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:18:37,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:18:37,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:18:37,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:18:37,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:18:37,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:18:37,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:18:37,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:18:37,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:18:37,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:18:37,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:18:37,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:18:37,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:18:37,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:18:37,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:18:37,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:18:37,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:18:37,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:18:37,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:18:37,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:18:37,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:18:37,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:18:37,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:18:37,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:18:37,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:18:37,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:18:37,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:18:37,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:18:37,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:18:37,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:18:37,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:18:37,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:18:37,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:18:37,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:18:37,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:18:37,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:18:37,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:18:37,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:18:37,796 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:18:37,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:18:37,797 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:18:37,797 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:18:37,797 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:18:37,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:18:37,798 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:18:37,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:18:37,798 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:18:37,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:18:37,799 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:18:37,799 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:18:37,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:18:37,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:18:37,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:18:37,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:18:37,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:18:37,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:18:37,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:18:37,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:18:37,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:18:37,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:18:37,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:18:37,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:18:37,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:18:37,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:18:37,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:18:37,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:18:37,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:18:37,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:18:37,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:18:37,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:18:37,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-22 02:18:38,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:18:38,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:18:38,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:18:38,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:18:38,182 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:18:38,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-22 02:18:41,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:18:41,783 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:18:41,783 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-22 02:18:41,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/data/daa9cd8fa/a24263b96d8e42e5b83440b9b33c9123/FLAG99fd7583d [2022-11-22 02:18:41,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/data/daa9cd8fa/a24263b96d8e42e5b83440b9b33c9123 [2022-11-22 02:18:41,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:18:41,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:18:41,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:18:41,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:18:41,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:18:41,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:18:41" (1/1) ... [2022-11-22 02:18:41,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac9353c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:41, skipping insertion in model container [2022-11-22 02:18:41,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:18:41" (1/1) ... [2022-11-22 02:18:41,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:18:41,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:18:42,367 WARN L237 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-22 02:18:42,375 WARN L237 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-22 02:18:43,127 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,129 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,131 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,132 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,137 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,161 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,162 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,169 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,169 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,171 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,174 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,174 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,176 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 02:18:43,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 02:18:43,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 02:18:43,532 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 02:18:43,533 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 02:18:43,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 02:18:43,535 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 02:18:43,536 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 02:18:43,538 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 02:18:43,543 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 02:18:43,700 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 02:18:43,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:18:43,738 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:18:43,752 WARN L237 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-22 02:18:43,753 WARN L237 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_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-22 02:18:43,794 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,794 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,795 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,795 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,796 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,805 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,805 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,807 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,807 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,809 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,809 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,810 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,810 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:18:43,867 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 02:18:43,870 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 02:18:43,872 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 02:18:43,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 02:18:43,879 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 02:18:43,880 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 02:18:43,881 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 02:18:43,881 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 02:18:43,882 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 02:18:43,882 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 02:18:43,932 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 02:18:43,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:18:44,268 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:18:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44 WrapperNode [2022-11-22 02:18:44,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:18:44,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:18:44,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:18:44,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:18:44,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,417 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-11-22 02:18:44,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:18:44,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:18:44,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:18:44,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:18:44,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:18:44,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:18:44,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:18:44,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:18:44,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (1/1) ... [2022-11-22 02:18:44,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:18:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:44,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:18:44,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:18:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:18:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:18:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:18:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-22 02:18:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-22 02:18:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:18:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-22 02:18:44,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-22 02:18:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:18:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:18:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:18:44,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:18:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:18:44,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:18:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:18:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:18:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:18:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 02:18:44,558 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 02:18:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:18:44,895 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:18:44,897 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:18:45,150 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:18:45,280 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:18:45,281 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:18:45,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:18:45 BoogieIcfgContainer [2022-11-22 02:18:45,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:18:45,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:18:45,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:18:45,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:18:45,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:18:41" (1/3) ... [2022-11-22 02:18:45,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41641d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:18:45, skipping insertion in model container [2022-11-22 02:18:45,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:18:44" (2/3) ... [2022-11-22 02:18:45,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41641d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:18:45, skipping insertion in model container [2022-11-22 02:18:45,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:18:45" (3/3) ... [2022-11-22 02:18:45,303 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-22 02:18:45,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:18:45,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:18:45,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:18:45,401 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600c922, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:18:45,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:18:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 02:18:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:18:45,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:45,417 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:18:45,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2022-11-22 02:18:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506341242] [2022-11-22 02:18:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:45,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:18:46,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506341242] [2022-11-22 02:18:46,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506341242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:46,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822189959] [2022-11-22 02:18:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:46,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:46,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:46,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:18:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:46,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-22 02:18:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:46,845 INFO L350 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 18 treesize of output 19 [2022-11-22 02:18:46,859 INFO L350 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 18 treesize of output 19 [2022-11-22 02:18:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-22 02:18:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-22 02:18:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:49,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:49,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822189959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:49,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:49,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-22 02:18:49,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908602819] [2022-11-22 02:18:49,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:49,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:18:49,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:18:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:18:49,600 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:18:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:50,645 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-11-22 02:18:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:18:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-22 02:18:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:50,657 INFO L225 Difference]: With dead ends: 124 [2022-11-22 02:18:50,657 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 02:18:50,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:18:50,664 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:50,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 226 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:18:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 02:18:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-22 02:18:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-22 02:18:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2022-11-22 02:18:50,729 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 37 [2022-11-22 02:18:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:50,730 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2022-11-22 02:18:50,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:18:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2022-11-22 02:18:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:18:50,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:50,733 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:18:50,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:50,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 02:18:50,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2022-11-22 02:18:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:50,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353676846] [2022-11-22 02:18:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:18:51,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353676846] [2022-11-22 02:18:51,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353676846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679555140] [2022-11-22 02:18:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:51,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:51,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:51,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:18:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-22 02:18:51,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:51,657 INFO L350 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 18 treesize of output 19 [2022-11-22 02:18:51,688 INFO L350 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 18 treesize of output 19 [2022-11-22 02:18:51,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-22 02:18:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 02:18:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-22 02:18:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 02:18:51,933 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 02:18:51,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-22 02:18:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-22 02:18:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-22 02:18:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-22 02:18:51,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-11-22 02:18:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:52,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 25 [2022-11-22 02:18:52,017 INFO L350 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 13 treesize of output 9 [2022-11-22 02:18:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:18:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:59,896 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-22 02:19:00,049 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse6 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse2 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse2 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (= v_ArrVal_212 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))))) is different from false [2022-11-22 02:19:00,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-22 02:19:00,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 137 [2022-11-22 02:19:00,258 INFO L350 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 132 treesize of output 128 [2022-11-22 02:19:00,272 INFO L350 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 128 treesize of output 126 [2022-11-22 02:19:00,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-22 02:19:00,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 516 treesize of output 444 [2022-11-22 02:19:00,345 INFO L350 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 322 treesize of output 314 [2022-11-22 02:19:00,389 INFO L350 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 314 treesize of output 310 [2022-11-22 02:19:00,559 INFO L350 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 6 treesize of output 4 [2022-11-22 02:19:00,573 INFO L350 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 6 treesize of output 4 [2022-11-22 02:19:00,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2022-11-22 02:19:00,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 79 [2022-11-22 02:19:00,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:00,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 02:19:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:00,803 INFO L350 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 64 treesize of output 56 [2022-11-22 02:19:00,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,827 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:19:00,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-11-22 02:19:00,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,838 INFO L350 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 11 treesize of output 7 [2022-11-22 02:19:00,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,866 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 02:19:00,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 02:19:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,886 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 02:19:00,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 02:19:00,896 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:19:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:00,914 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 02:19:00,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 02:19:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-22 02:19:01,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679555140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:01,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447208441] [2022-11-22 02:19:01,038 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:19:01,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:01,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:01,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:01,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,147 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 02:19:01,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-11-22 02:19:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,232 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:19:01,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:19:01,587 INFO L350 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 24 treesize of output 9 [2022-11-22 02:19:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:19:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:19:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:19:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,811 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 02:19:01,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-22 02:19:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:19:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:19:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:01,971 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:19:01,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 02:19:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,076 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:19:02,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:19:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:02,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:19:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:19:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:02,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:19:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:19:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:19:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:19:02,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:19:02,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:19:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,384 INFO L350 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 35 treesize of output 7 [2022-11-22 02:19:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,404 INFO L350 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 35 treesize of output 7 [2022-11-22 02:19:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:02,417 INFO L350 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 29 treesize of output 17 [2022-11-22 02:19:03,083 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-22 02:19:03,286 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-22 02:19:03,336 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:19:03,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:06,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1447208441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:06,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:06,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-22 02:19:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528566864] [2022-11-22 02:19:06,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:19:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:19:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-22 02:19:06,730 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:19:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:09,002 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2022-11-22 02:19:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:19:09,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-22 02:19:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:09,009 INFO L225 Difference]: With dead ends: 141 [2022-11-22 02:19:09,009 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 02:19:09,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=120, Invalid=942, Unknown=2, NotChecked=126, Total=1190 [2022-11-22 02:19:09,011 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:09,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 171 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:19:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 02:19:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-22 02:19:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 68 states have internal predecessors, (87), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 02:19:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-11-22 02:19:09,058 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 38 [2022-11-22 02:19:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:09,058 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-11-22 02:19:09,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 02:19:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-11-22 02:19:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:19:09,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:09,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 02:19:09,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:09,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:09,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2002901553, now seen corresponding path program 1 times [2022-11-22 02:19:09,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:09,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950760730] [2022-11-22 02:19:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:19:09,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:09,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950760730] [2022-11-22 02:19:09,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950760730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:09,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873728083] [2022-11-22 02:19:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:09,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:09,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:19:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:19:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:19:09,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:19:09,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873728083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:09,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:19:09,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-22 02:19:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293687281] [2022-11-22 02:19:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:19:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:19:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:19:09,830 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:10,000 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-11-22 02:19:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:19:10,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2022-11-22 02:19:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:10,002 INFO L225 Difference]: With dead ends: 211 [2022-11-22 02:19:10,003 INFO L226 Difference]: Without dead ends: 113 [2022-11-22 02:19:10,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:10,005 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:10,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-22 02:19:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-22 02:19:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 68 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 02:19:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2022-11-22 02:19:10,050 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 40 [2022-11-22 02:19:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:10,050 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2022-11-22 02:19:10,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2022-11-22 02:19:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:19:10,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:10,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 02:19:10,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:10,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:10,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:10,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1414514697, now seen corresponding path program 1 times [2022-11-22 02:19:10,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867764548] [2022-11-22 02:19:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:19:10,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867764548] [2022-11-22 02:19:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867764548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587924460] [2022-11-22 02:19:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:10,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:10,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:19:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:19:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:19:10,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:19:10,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587924460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:10,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:19:10,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-22 02:19:10,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986013246] [2022-11-22 02:19:10,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:10,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:19:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:19:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:10,817 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:11,078 INFO L93 Difference]: Finished difference Result 253 states and 338 transitions. [2022-11-22 02:19:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:19:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-22 02:19:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:11,086 INFO L225 Difference]: With dead ends: 253 [2022-11-22 02:19:11,086 INFO L226 Difference]: Without dead ends: 153 [2022-11-22 02:19:11,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:19:11,088 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:11,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 177 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:19:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-22 02:19:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 107. [2022-11-22 02:19:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 02:19:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-11-22 02:19:11,129 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 42 [2022-11-22 02:19:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:11,129 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-11-22 02:19:11,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-11-22 02:19:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:19:11,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:11,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 02:19:11,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:11,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 52028477, now seen corresponding path program 1 times [2022-11-22 02:19:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651343243] [2022-11-22 02:19:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:19:11,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651343243] [2022-11-22 02:19:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651343243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94874039] [2022-11-22 02:19:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:11,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:11,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:11,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:11,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:19:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:19:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:19:11,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:19:11,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94874039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:11,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:19:11,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-22 02:19:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149384631] [2022-11-22 02:19:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:19:11,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:19:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:19:11,906 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:11,992 INFO L93 Difference]: Finished difference Result 229 states and 313 transitions. [2022-11-22 02:19:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:19:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-11-22 02:19:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:11,994 INFO L225 Difference]: With dead ends: 229 [2022-11-22 02:19:11,994 INFO L226 Difference]: Without dead ends: 135 [2022-11-22 02:19:11,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:19:11,996 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:11,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:19:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-22 02:19:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-11-22 02:19:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 76 states have internal predecessors, (95), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 02:19:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-11-22 02:19:12,038 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 43 [2022-11-22 02:19:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:12,039 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-11-22 02:19:12,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:19:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-11-22 02:19:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:19:12,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:12,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-11-22 02:19:12,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:12,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2022-11-22 02:19:12,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:12,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65710918] [2022-11-22 02:19:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:19:12,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65710918] [2022-11-22 02:19:12,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65710918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947285175] [2022-11-22 02:19:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:12,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:19:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-22 02:19:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:13,020 INFO L350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 02:19:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:13,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:19:13,094 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 02:19:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-22 02:19:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:13,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 111 treesize of output 91 [2022-11-22 02:19:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:13,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-22 02:19:13,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-11-22 02:19:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:13,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 25 [2022-11-22 02:19:13,140 INFO L350 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 13 treesize of output 9 [2022-11-22 02:19:28,493 WARN L233 SmtUtils]: Spent 11.51s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:19:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:19:34,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947285175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574033974] [2022-11-22 02:19:39,430 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 02:19:39,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:39,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:39,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:39,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,516 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:19:39,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:19:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:19:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:19:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:19:39,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:19:39,910 INFO L350 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 24 treesize of output 9 [2022-11-22 02:19:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,032 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 02:19:40,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-22 02:19:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:19:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,185 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:19:40,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:19:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:19:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:19:40,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:19:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,886 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 02:19:40,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-22 02:19:40,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:41,250 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-22 02:19:41,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-11-22 02:19:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:41,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:19:41,589 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 02:19:41,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-11-22 02:19:41,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:41,669 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 02:19:41,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 633 [2022-11-22 02:19:41,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 654 treesize of output 633 [2022-11-22 02:19:41,821 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 02:19:41,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-11-22 02:19:44,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:19:44,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:19:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:44,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:19:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:19:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:19:44,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:19:44,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,274 INFO L350 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 29 treesize of output 17 [2022-11-22 02:19:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,305 INFO L350 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 35 treesize of output 7 [2022-11-22 02:19:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:19:44,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:44,360 INFO L350 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 35 treesize of output 7 [2022-11-22 02:19:45,079 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-22 02:19:45,546 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-22 02:19:45,603 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:19:45,625 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-22 02:19:45,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:52,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1574033974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:52,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:52,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 17, 8] total 46 [2022-11-22 02:19:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903422803] [2022-11-22 02:19:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:19:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:19:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1898, Unknown=2, NotChecked=0, Total=2070 [2022-11-22 02:19:52,623 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:19:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:56,914 INFO L93 Difference]: Finished difference Result 231 states and 295 transitions. [2022-11-22 02:19:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:19:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-22 02:19:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:56,916 INFO L225 Difference]: With dead ends: 231 [2022-11-22 02:19:56,916 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 02:19:56,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=224, Invalid=2426, Unknown=2, NotChecked=0, Total=2652 [2022-11-22 02:19:56,918 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:56,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:19:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 02:19:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-22 02:19:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3) internal successors, (104), 84 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-22 02:19:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2022-11-22 02:19:56,966 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 46 [2022-11-22 02:19:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:56,967 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2022-11-22 02:19:56,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:19:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2022-11-22 02:19:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:19:56,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:56,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2022-11-22 02:19:56,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:19:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:19:57,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2022-11-22 02:19:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113220381] [2022-11-22 02:19:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:19:58,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:58,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113220381] [2022-11-22 02:19:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113220381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:58,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063513904] [2022-11-22 02:19:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:58,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:58,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:58,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:58,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:19:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-22 02:19:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:58,429 INFO L350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 02:19:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:58,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:19:58,490 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-22 02:19:58,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 100 [2022-11-22 02:19:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:58,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 86 treesize of output 72 [2022-11-22 02:19:58,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-11-22 02:19:58,616 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_19 24)) (not (= .cse0 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))))) is different from true [2022-11-22 02:19:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:59,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:59,490 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int)) (v_ArrVal_822 (Array Int Int)) (v_ArrVal_823 Int)) (not (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_821) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_822) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_823)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2022-11-22 02:19:59,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:59,501 INFO L350 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-11-22 02:19:59,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:59,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 314 treesize of output 290 [2022-11-22 02:19:59,534 INFO L350 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 306 treesize of output 298 [2022-11-22 02:19:59,564 INFO L350 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 298 treesize of output 294 [2022-11-22 02:19:59,636 INFO L350 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 6 treesize of output 4 [2022-11-22 02:19:59,657 INFO L350 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 24 treesize of output 22 [2022-11-22 02:19:59,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:59,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-11-22 02:19:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-22 02:19:59,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063513904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190738216] [2022-11-22 02:19:59,947 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:19:59,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:59,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:59,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:59,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,036 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:20:00,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:20:00,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:20:00,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:20:00,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:20:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:20:00,413 INFO L350 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 24 treesize of output 9 [2022-11-22 02:20:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:20:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,543 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:20:00,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:20:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:20:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:20:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:20:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 02:20:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:00,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,273 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 02:20:01,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-22 02:20:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:01,697 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-22 02:20:01,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 680 treesize of output 689 [2022-11-22 02:20:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:01,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:20:02,123 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 02:20:02,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-11-22 02:20:02,294 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 02:20:02,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-22 02:20:02,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:02,377 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 02:20:02,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-22 02:20:02,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-22 02:20:22,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:20:22,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:20:22,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:22,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:20:22,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-22 02:20:22,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:20:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:20:22,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:20:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,857 INFO L350 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 35 treesize of output 7 [2022-11-22 02:20:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,876 INFO L350 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 35 treesize of output 7 [2022-11-22 02:20:22,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:22,888 INFO L350 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 29 treesize of output 17 [2022-11-22 02:20:23,396 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-22 02:20:24,243 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 154 for LOIs [2022-11-22 02:20:24,291 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:20:24,309 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:20:24,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1190738216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:29,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 12, 11] total 46 [2022-11-22 02:20:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636625799] [2022-11-22 02:20:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:20:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:20:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1733, Unknown=7, NotChecked=170, Total=2070 [2022-11-22 02:20:29,806 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:20:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:35,093 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-11-22 02:20:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:20:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-22 02:20:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:35,095 INFO L225 Difference]: With dead ends: 257 [2022-11-22 02:20:35,095 INFO L226 Difference]: Without dead ends: 141 [2022-11-22 02:20:35,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=266, Invalid=2479, Unknown=19, NotChecked=206, Total=2970 [2022-11-22 02:20:35,097 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:35,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 183 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 02:20:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-22 02:20:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-11-22 02:20:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 86 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-22 02:20:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2022-11-22 02:20:35,137 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 48 [2022-11-22 02:20:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:35,138 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2022-11-22 02:20:35,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:20:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2022-11-22 02:20:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:20:35,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:35,140 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2022-11-22 02:20:35,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:35,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:20:35,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 608912414, now seen corresponding path program 1 times [2022-11-22 02:20:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:35,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605078670] [2022-11-22 02:20:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:35,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:20:35,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605078670] [2022-11-22 02:20:35,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605078670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178040224] [2022-11-22 02:20:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:35,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:35,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:20:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 02:20:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:35,927 INFO L350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 02:20:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:35,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 treesize of output 16 [2022-11-22 02:20:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:35,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 21 [2022-11-22 02:20:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:35,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 16 treesize of output 20 [2022-11-22 02:20:36,239 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:20:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-22 02:20:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:20:36,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:40,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:40,647 INFO L350 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 02:20:40,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:40,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-22 02:20:40,678 INFO L350 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 148 treesize of output 144 [2022-11-22 02:20:40,691 INFO L350 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 144 treesize of output 142 [2022-11-22 02:20:40,778 INFO L350 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 6 treesize of output 4 [2022-11-22 02:20:40,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:40,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-11-22 02:20:40,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-22 02:20:40,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 48 treesize of output 46 [2022-11-22 02:20:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:20:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178040224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31445443] [2022-11-22 02:20:41,025 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:20:41,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:41,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:41,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:41,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,092 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 02:20:41,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-11-22 02:20:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,157 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:20:41,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:20:41,392 INFO L350 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 24 treesize of output 9 [2022-11-22 02:20:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:20:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:20:41,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:20:41,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:20:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:41,577 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:20:41,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 02:20:41,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,671 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:20:41,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:20:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:20:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:20:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 02:20:41,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:20:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:20:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:20:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:41,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:20:41,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:20:41,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:20:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:42,009 INFO L350 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 35 treesize of output 7 [2022-11-22 02:20:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:42,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:20:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:42,051 INFO L350 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 35 treesize of output 7 [2022-11-22 02:20:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:42,074 INFO L350 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 29 treesize of output 17 [2022-11-22 02:20:44,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-22 02:20:44,778 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 02:20:45,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 02:20:45,569 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:20:45,586 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:20:45,645 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:53,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5068#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:20:53,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:20:53,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:53,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2022-11-22 02:20:53,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936665729] [2022-11-22 02:20:53,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:20:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:20:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2341, Unknown=8, NotChecked=0, Total=2550 [2022-11-22 02:20:53,855 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-22 02:20:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:55,870 INFO L93 Difference]: Finished difference Result 264 states and 346 transitions. [2022-11-22 02:20:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:20:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2022-11-22 02:20:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:55,872 INFO L225 Difference]: With dead ends: 264 [2022-11-22 02:20:55,873 INFO L226 Difference]: Without dead ends: 201 [2022-11-22 02:20:55,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=307, Invalid=3464, Unknown=11, NotChecked=0, Total=3782 [2022-11-22 02:20:55,875 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 212 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:55,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 544 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 02:20:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-22 02:20:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2022-11-22 02:20:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 90 states have internal predecessors, (110), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-22 02:20:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-11-22 02:20:55,923 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 49 [2022-11-22 02:20:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:55,923 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-11-22 02:20:55,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-22 02:20:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-11-22 02:20:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:20:55,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:55,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-22 02:20:55,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:56,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:56,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1615843155, now seen corresponding path program 1 times [2022-11-22 02:20:56,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:56,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276694935] [2022-11-22 02:20:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:56,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:20:56,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276694935] [2022-11-22 02:20:56,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276694935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:56,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802515609] [2022-11-22 02:20:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:56,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:56,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:56,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:56,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:20:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:20:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:20:56,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:20:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802515609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:56,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:20:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-22 02:20:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552211729] [2022-11-22 02:20:56,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:56,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:20:56,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:20:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:20:56,701 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:20:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:56,995 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2022-11-22 02:20:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:20:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-22 02:20:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:56,998 INFO L225 Difference]: With dead ends: 251 [2022-11-22 02:20:56,998 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 02:20:56,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:20:57,001 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:57,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 176 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:20:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 02:20:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-11-22 02:20:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 90 states have internal predecessors, (108), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-22 02:20:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2022-11-22 02:20:57,097 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 52 [2022-11-22 02:20:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:57,097 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2022-11-22 02:20:57,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:20:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2022-11-22 02:20:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:20:57,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:57,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2022-11-22 02:20:57,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:57,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:20:57,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1603461069, now seen corresponding path program 1 times [2022-11-22 02:20:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:57,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016736566] [2022-11-22 02:20:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 02:20:57,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016736566] [2022-11-22 02:20:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016736566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112187651] [2022-11-22 02:20:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:57,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:57,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:57,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:20:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:20:58,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:20:58,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112187651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:58,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:20:58,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-22 02:20:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865072053] [2022-11-22 02:20:58,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:58,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:20:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:20:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:20:58,040 INFO L87 Difference]: Start difference. First operand 131 states and 165 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:20:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:58,371 INFO L93 Difference]: Finished difference Result 277 states and 347 transitions. [2022-11-22 02:20:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:20:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-11-22 02:20:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:58,376 INFO L225 Difference]: With dead ends: 277 [2022-11-22 02:20:58,376 INFO L226 Difference]: Without dead ends: 157 [2022-11-22 02:20:58,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:20:58,377 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:58,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:20:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-22 02:20:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2022-11-22 02:20:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 90 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-22 02:20:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2022-11-22 02:20:58,442 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 56 [2022-11-22 02:20:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:58,443 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2022-11-22 02:20:58,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:20:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2022-11-22 02:20:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:20:58,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:58,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:20:58,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:20:58,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -113358028, now seen corresponding path program 1 times [2022-11-22 02:20:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197967740] [2022-11-22 02:20:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:20:58,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197967740] [2022-11-22 02:20:58,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197967740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301846161] [2022-11-22 02:20:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:58,913 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:20:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-22 02:20:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:59,385 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-22 02:20:59,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-22 02:20:59,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-22 02:20:59,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-11-22 02:20:59,452 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-22 02:20:59,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2022-11-22 02:20:59,456 INFO L350 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 29 treesize of output 17 [2022-11-22 02:20:59,547 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (not (= .cse0 0)) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_40 24)))))))) is different from true [2022-11-22 02:21:00,221 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_aws_linked_list_is_valid_~list#1.base| |c_aws_linked_list_is_valid_#in~list#1.base|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (not (= .cse0 0)) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_40 24)))))))) (let ((.cse12 (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_~list#1.base|)) (.cse16 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 24)) (.cse14 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_~list#1.base|)) (.cse15 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 8))) (let ((.cse5 (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0)) (.cse4 (= |c_aws_linked_list_is_valid_~list#1.base| 0)) (.cse9 (= (select .cse14 .cse15) 0)) (.cse2 (= (select .cse14 .cse16) 0)) (.cse3 (= (select .cse12 .cse16) 0)) (.cse1 (not |c_aws_linked_list_is_valid_#t~short303#1|)) (.cse6 (= (select .cse14 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0)) (.cse7 (= (select .cse12 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0)) (.cse8 (= (select .cse12 .cse15) 0))) (or (and .cse1 (or (and .cse2 .cse3) (and .cse4 .cse5) (and .cse6 .cse7) (not .cse8) (not .cse9))) (and (or (not .cse5) (not .cse4)) .cse9 (or (not .cse2) (not .cse3)) (let ((.cse13 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse11 (= (select .cse14 .cse13) 0)) (.cse10 (= (select .cse12 .cse13) 0))) (or (and .cse1 (or (not .cse10) (not .cse11))) (and .cse11 .cse10 |c_aws_linked_list_is_valid_#t~short303#1|)))) (or (not .cse6) (not .cse7)) .cse8))))) is different from true [2022-11-22 02:21:18,455 WARN L233 SmtUtils]: Spent 17.19s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:21:24,341 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_aws_linked_list_is_valid_~list#1.offset| |c_aws_linked_list_is_valid_#in~list#1.offset|) (or (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (let ((.cse0 (select .cse2 24)) (.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= (select v_DerPreprocessor_40 24) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= (select .cse1 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (= (select .cse1 8) 0) (= (select .cse2 16) 0) (= 0 (select .cse2 8)) (not (= .cse0 0)) (= (select .cse1 16) 0))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|)) (.cse4 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| (select .cse3 24)) (not (= (select .cse4 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (= (select .cse4 8) 0) (= (select .cse3 16) 0) (= 0 (select .cse3 8)) (= (select .cse4 16) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|)) (.cse6 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| (select .cse5 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (not (= (select .cse5 0) 0)) (= (select .cse6 8) 0) (= (select .cse5 16) 0) (= 0 (select .cse5 8)) (= (select .cse6 16) 0)))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (let ((.cse7 (select .cse8 24)) (.cse9 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= (select v_DerPreprocessor_40 24) .cse7) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse7 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse7 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse7) (select |c_#memory_$Pointer$.base| .cse7)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (not (= (select .cse8 0) 0)) (= (select .cse9 8) 0) (= (select .cse8 16) 0) (= 0 (select .cse8 8)) (not (= .cse7 0)) (= (select .cse9 16) 0)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (not (= .cse10 0)) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse10 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse10 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse10) (select |c_#memory_$Pointer$.base| .cse10)) (= .cse10 (select v_DerPreprocessor_40 24)))))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| Int)) (let ((.cse11 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|)) (.cse12 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|))) (and (not (= (select .cse11 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|) (= (select .cse12 16) 0) (= (select .cse12 8) 0) (= (select .cse11 16) 0) (= (select .cse11 8) 0) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| (select .cse12 24))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| Int)) (let ((.cse15 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|))) (let ((.cse13 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|)) (.cse14 (select .cse15 24))) (and (not (= (select .cse13 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|) (not (= .cse14 0)) (= (select .cse15 16) 0) (= (select .cse15 8) 0) (= .cse14 (select v_DerPreprocessor_40 24)) (= (select .cse13 16) 0) (= (select .cse13 8) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse14 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| v_DerPreprocessor_40) .cse14 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| v_DerPreprocessor_40) .cse14) (select |c_#memory_$Pointer$.base| .cse14)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| Int)) (let ((.cse17 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|)) (.cse16 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|) (not (= 0 (select .cse16 0))) (= (select .cse16 16) 0) (= (select .cse16 8) 0) (= (select .cse17 16) 0) (= (select .cse17 8) 0) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| (select .cse16 24))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| Int)) (let ((.cse19 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|))) (let ((.cse20 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|)) (.cse18 (select .cse19 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27|) (not (= .cse18 0)) (not (= 0 (select .cse19 0))) (= (select .cse19 16) 0) (= (select .cse19 8) 0) (= .cse18 (select v_DerPreprocessor_40 24)) (= (select .cse20 16) 0) (= (select .cse20 8) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse18 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| v_DerPreprocessor_40) .cse18 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_27| v_DerPreprocessor_40) .cse18) (select |c_#memory_$Pointer$.base| .cse18)))))))) is different from true [2022-11-22 02:21:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2022-11-22 02:21:41,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:21:46,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301846161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:46,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087389516] [2022-11-22 02:21:46,630 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 02:21:46,630 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:46,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:46,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:46,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,714 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:21:46,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:21:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:21:46,973 INFO L350 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 24 treesize of output 9 [2022-11-22 02:21:46,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:21:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:21:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:21:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,191 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:21:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:21:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:21:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:21:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 02:21:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:21:47,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:21:47,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,954 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 02:21:47,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-22 02:21:47,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,047 INFO L321 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2022-11-22 02:21:48,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 672 treesize of output 637 [2022-11-22 02:21:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 658 treesize of output 637 [2022-11-22 02:21:48,361 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-22 02:21:48,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 645 treesize of output 656 [2022-11-22 02:21:48,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,669 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-22 02:21:48,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 690 treesize of output 693 [2022-11-22 02:21:48,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:21:48,890 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-22 02:21:48,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-11-22 02:22:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:22:02,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 02:22:02,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 02:22:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:22:02,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:22:02,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:22:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,724 INFO L350 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 35 treesize of output 7 [2022-11-22 02:22:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,743 INFO L350 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 35 treesize of output 7 [2022-11-22 02:22:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,753 INFO L350 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 29 treesize of output 17 [2022-11-22 02:22:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:02,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:22:03,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-22 02:22:03,991 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-22 02:22:04,048 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:22:04,067 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:22:04,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:12,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2087389516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:22:12,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:12,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 51 [2022-11-22 02:22:12,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031679245] [2022-11-22 02:22:12,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:12,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:22:12,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:22:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2018, Unknown=52, NotChecked=282, Total=2550 [2022-11-22 02:22:12,290 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:22:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:18,405 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-11-22 02:22:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:22:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-11-22 02:22:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:18,407 INFO L225 Difference]: With dead ends: 261 [2022-11-22 02:22:18,407 INFO L226 Difference]: Without dead ends: 139 [2022-11-22 02:22:18,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=278, Invalid=2751, Unknown=63, NotChecked=330, Total=3422 [2022-11-22 02:22:18,409 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:18,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 170 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:22:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-22 02:22:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2022-11-22 02:22:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 90 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-22 02:22:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-11-22 02:22:18,477 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 60 [2022-11-22 02:22:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:18,477 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-11-22 02:22:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:22:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-11-22 02:22:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:22:18,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:18,479 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:22:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:22:18,685 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash -129172476, now seen corresponding path program 1 times [2022-11-22 02:22:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:18,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388230384] [2022-11-22 02:22:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:18,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:22:18,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388230384] [2022-11-22 02:22:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388230384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164847118] [2022-11-22 02:22:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:18,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:18,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:18,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:22:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:22:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:22:19,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:22:19,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164847118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019374505] [2022-11-22 02:22:19,588 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:22:19,589 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:19,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:19,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:19,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:22:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,677 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:22:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:22:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:22:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:22:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:22:19,976 INFO L350 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 24 treesize of output 9 [2022-11-22 02:22:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:22:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:22:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,137 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:22:20,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:22:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:22:20,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 02:22:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:22:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:22:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,812 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 02:22:20,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-22 02:22:20,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:20,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:21,118 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-22 02:22:21,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 688 treesize of output 691 [2022-11-22 02:22:21,392 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 02:22:21,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-11-22 02:22:21,548 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 02:22:21,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-11-22 02:22:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:21,613 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 02:22:21,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-11-22 02:22:21,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-22 02:23:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,042 INFO L350 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 71 treesize of output 19 [2022-11-22 02:23:27,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:23:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:23:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:23:27,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 02:23:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:23:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:23:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,677 INFO L350 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 29 treesize of output 17 [2022-11-22 02:23:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,693 INFO L350 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 35 treesize of output 7 [2022-11-22 02:23:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:23:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:27,724 INFO L350 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 35 treesize of output 7 [2022-11-22 02:23:28,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-22 02:23:28,609 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-22 02:23:29,402 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-22 02:23:29,404 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:23:29,420 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:23:29,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:36,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8577#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-22 02:23:36,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:36,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:36,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-22 02:23:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699979233] [2022-11-22 02:23:36,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:36,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:23:36,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:36,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:23:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 02:23:36,153 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:23:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:36,546 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-11-22 02:23:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:23:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-11-22 02:23:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:36,548 INFO L225 Difference]: With dead ends: 261 [2022-11-22 02:23:36,548 INFO L226 Difference]: Without dead ends: 154 [2022-11-22 02:23:36,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:23:36,550 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:36,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 589 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:23:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-22 02:23:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2022-11-22 02:23:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 94 states have internal predecessors, (107), 28 states have call successors, (28), 14 states have call predecessors, (28), 18 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2022-11-22 02:23:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2022-11-22 02:23:36,596 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 63 [2022-11-22 02:23:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:36,596 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2022-11-22 02:23:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:23:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2022-11-22 02:23:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:23:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:36,598 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:23:36,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-22 02:23:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:36,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1966738942, now seen corresponding path program 1 times [2022-11-22 02:23:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:36,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543747942] [2022-11-22 02:23:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 02:23:37,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:37,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543747942] [2022-11-22 02:23:37,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543747942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:37,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817171306] [2022-11-22 02:23:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:37,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:37,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:37,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:37,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:23:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-22 02:23:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:39,609 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0)))) is different from true [2022-11-22 02:23:40,547 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 02:23:40,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:23:40,555 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-22 02:23:40,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-22 02:23:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-22 02:23:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:41,284 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-22 02:23:41,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-22 02:23:41,298 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-22 02:23:41,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-22 02:23:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:23:41,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817171306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:41,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746077833] [2022-11-22 02:23:41,333 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:23:41,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:41,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:41,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:41,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,421 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 02:23:41,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-11-22 02:23:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,491 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:23:41,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:23:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:23:41,715 INFO L350 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 24 treesize of output 9 [2022-11-22 02:23:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:23:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:23:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:23:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:41,856 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:23:41,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 02:23:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,963 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:23:41,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:23:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:23:42,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 02:23:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:42,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:23:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:23:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-22 02:23:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:23:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 02:23:42,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:23:42,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:23:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:23:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,265 INFO L350 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 35 treesize of output 7 [2022-11-22 02:23:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,284 INFO L350 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 35 treesize of output 7 [2022-11-22 02:23:42,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,298 INFO L350 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 29 treesize of output 17 [2022-11-22 02:23:44,596 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-22 02:23:44,622 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 02:23:45,403 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 02:23:45,404 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:23:45,421 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:23:45,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:55,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9598#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|))) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:55,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:55,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:55,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-11-22 02:23:55,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088232960] [2022-11-22 02:23:55,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 02:23:55,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 02:23:55,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-11-22 02:23:55,044 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-22 02:23:57,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:23:59,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:01,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:05,385 INFO L93 Difference]: Finished difference Result 396 states and 486 transitions. [2022-11-22 02:24:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 02:24:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-11-22 02:24:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:05,387 INFO L225 Difference]: With dead ends: 396 [2022-11-22 02:24:05,388 INFO L226 Difference]: Without dead ends: 255 [2022-11-22 02:24:05,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=892, Invalid=7853, Unknown=1, NotChecked=184, Total=8930 [2022-11-22 02:24:05,391 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 215 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 92 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:05,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 517 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1288 Invalid, 3 Unknown, 138 Unchecked, 7.6s Time] [2022-11-22 02:24:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-22 02:24:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2022-11-22 02:24:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.205128205128205) internal successors, (141), 121 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-22 02:24:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2022-11-22 02:24:05,458 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 65 [2022-11-22 02:24:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:05,458 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2022-11-22 02:24:05,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-22 02:24:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2022-11-22 02:24:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:24:05,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:05,460 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-11-22 02:24:05,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:05,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:05,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:05,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1008273620, now seen corresponding path program 2 times [2022-11-22 02:24:05,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:05,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176960117] [2022-11-22 02:24:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:05,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:24:07,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:07,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176960117] [2022-11-22 02:24:07,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176960117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:07,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718918677] [2022-11-22 02:24:07,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:24:07,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:07,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:07,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:24:07,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:24:07,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:24:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-22 02:24:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:07,425 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-22 02:24:07,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-22 02:24:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:24:13,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:24:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718918677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:24:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1165642211] [2022-11-22 02:24:17,496 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:24:17,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:17,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:17,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:17,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:24:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,570 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:24:17,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:24:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:24:17,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:24:17,812 INFO L350 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 24 treesize of output 9 [2022-11-22 02:24:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:24:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:24:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:24:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:17,984 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 02:24:17,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-22 02:24:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:24:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:24:18,043 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:24:18,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 02:24:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:24:18,102 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:24:18,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 02:24:18,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,208 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:24:18,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 02:24:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 02:24:18,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:24:18,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:24:18,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:24:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:24:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-22 02:24:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-22 02:24:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 02:24:18,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:24:18,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 02:24:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 02:24:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:24:18,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 02:24:18,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-22 02:24:18,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2022-11-22 02:24:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,587 INFO L350 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 29 treesize of output 17 [2022-11-22 02:24:18,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,618 INFO L350 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 35 treesize of output 7 [2022-11-22 02:24:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,636 INFO L350 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 35 treesize of output 7 [2022-11-22 02:24:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:18,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 02:24:20,104 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-22 02:24:20,126 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 02:24:20,848 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 02:24:20,849 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:24:20,868 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:24:20,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:31,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10939#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:24:31,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:24:31,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:24:31,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2022-11-22 02:24:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668812150] [2022-11-22 02:24:31,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:24:31,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:24:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2452, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:24:31,662 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-22 02:24:33,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:36,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:38,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:40,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:42,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:48,797 INFO L93 Difference]: Finished difference Result 299 states and 366 transitions. [2022-11-22 02:24:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:24:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2022-11-22 02:24:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:48,800 INFO L225 Difference]: With dead ends: 299 [2022-11-22 02:24:48,800 INFO L226 Difference]: Without dead ends: 233 [2022-11-22 02:24:48,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=425, Invalid=4977, Unknown=0, NotChecked=0, Total=5402 [2022-11-22 02:24:48,802 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 230 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 267 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:48,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 378 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1153 Invalid, 5 Unknown, 0 Unchecked, 12.6s Time] [2022-11-22 02:24:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-22 02:24:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 173. [2022-11-22 02:24:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-22 02:24:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2022-11-22 02:24:48,892 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 66 [2022-11-22 02:24:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:48,892 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2022-11-22 02:24:48,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-22 02:24:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2022-11-22 02:24:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:24:48,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:48,894 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:24:48,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:24:49,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2022-11-22 02:24:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:49,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046972160] [2022-11-22 02:24:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:24:51,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046972160] [2022-11-22 02:24:51,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046972160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775766007] [2022-11-22 02:24:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:51,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:51,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:51,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:24:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-22 02:24:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:56,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:07,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775766007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857799144] [2022-11-22 02:25:07,493 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:25:07,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:07,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:07,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:07,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,705 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:25:07,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:25:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:25:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:25:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:25:08,041 INFO L350 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 24 treesize of output 9 [2022-11-22 02:25:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:25:08,141 INFO L350 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 35 treesize of output 7 [2022-11-22 02:25:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:25:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:25:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:08,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 02:25:17,796 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-11-22 02:25:18,070 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 02:25:18,757 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-22 02:25:18,796 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:25:18,814 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:25:18,888 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:58,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12009#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 2)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 32))) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:25:58,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:58,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:25:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-11-22 02:25:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154271269] [2022-11-22 02:25:58,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 02:25:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 02:25:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5415, Unknown=0, NotChecked=0, Total=5852 [2022-11-22 02:25:58,926 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-22 02:26:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:11,197 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-11-22 02:26:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:26:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-22 02:26:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:11,199 INFO L225 Difference]: With dead ends: 269 [2022-11-22 02:26:11,199 INFO L226 Difference]: Without dead ends: 229 [2022-11-22 02:26:11,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=856, Invalid=9244, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 02:26:11,203 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 263 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:11,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 510 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-22 02:26:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-22 02:26:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2022-11-22 02:26:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 122 states have internal predecessors, (139), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-22 02:26:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2022-11-22 02:26:11,333 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 67 [2022-11-22 02:26:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:11,333 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2022-11-22 02:26:11,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-22 02:26:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2022-11-22 02:26:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 02:26:11,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:11,335 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:26:11,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:11,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:26:11,542 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1989271983, now seen corresponding path program 1 times [2022-11-22 02:26:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469411336] [2022-11-22 02:26:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:11,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-22 02:26:11,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469411336] [2022-11-22 02:26:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469411336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:11,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:26:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377802093] [2022-11-22 02:26:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:26:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:26:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:26:11,974 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 02:26:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:12,723 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2022-11-22 02:26:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:26:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-22 02:26:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:12,725 INFO L225 Difference]: With dead ends: 195 [2022-11-22 02:26:12,725 INFO L226 Difference]: Without dead ends: 193 [2022-11-22 02:26:12,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:26:12,726 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:12,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:26:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-22 02:26:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-11-22 02:26:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 35 states have call successors, (35), 21 states have call predecessors, (35), 23 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-11-22 02:26:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 215 transitions. [2022-11-22 02:26:12,862 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 215 transitions. Word has length 70 [2022-11-22 02:26:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:12,863 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 215 transitions. [2022-11-22 02:26:12,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 02:26:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 215 transitions. [2022-11-22 02:26:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:26:12,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:12,864 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-22 02:26:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:26:12,865 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:26:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2027580686, now seen corresponding path program 2 times [2022-11-22 02:26:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:12,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572168361] [2022-11-22 02:26:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:26:15,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:15,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572168361] [2022-11-22 02:26:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572168361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:15,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056265793] [2022-11-22 02:26:15,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:26:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:15,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:26:15,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:26:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:26:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-22 02:26:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:42,365 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:26:42,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:45,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:26:45,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:26:45,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:26:45,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-22 02:26:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:26:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056265793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127320347] [2022-11-22 02:26:45,560 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 02:26:45,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:45,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:45,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:45,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:45,763 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:26:45,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 02:26:45,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:45,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 02:26:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:26:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 02:26:46,074 INFO L350 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 24 treesize of output 9 [2022-11-22 02:26:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 02:26:46,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 02:26:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 02:26:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 02:26:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:46,306 INFO L350 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 35 treesize of output 7 [2022-11-22 02:26:55,166 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-11-22 02:26:55,378 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 02:26:56,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-22 02:26:56,118 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:26:56,135 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:26:56,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:34,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13766#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) 16) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 1) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:34,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:34,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:34,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-11-22 02:27:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117322812] [2022-11-22 02:27:34,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:34,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 02:27:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 02:27:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3631, Unknown=7, NotChecked=0, Total=4032 [2022-11-22 02:27:34,777 INFO L87 Difference]: Start difference. First operand 183 states and 215 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-22 02:27:55,513 WARN L233 SmtUtils]: Spent 20.15s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:05,723 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:15,932 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:26,152 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:46,526 WARN L233 SmtUtils]: Spent 20.18s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:57,067 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:18,459 WARN L233 SmtUtils]: Spent 20.17s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:20,339 INFO L93 Difference]: Finished difference Result 277 states and 323 transitions. [2022-11-22 02:29:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:29:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-22 02:29:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:20,343 INFO L225 Difference]: With dead ends: 277 [2022-11-22 02:29:20,343 INFO L226 Difference]: Without dead ends: 200 [2022-11-22 02:29:20,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 168.7s TimeCoverageRelationStatistics Valid=603, Invalid=5396, Unknown=7, NotChecked=0, Total=6006 [2022-11-22 02:29:20,347 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 239 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:20,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 708 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:29:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-22 02:29:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2022-11-22 02:29:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-22 02:29:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 194 transitions. [2022-11-22 02:29:20,461 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 194 transitions. Word has length 73 [2022-11-22 02:29:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:20,461 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 194 transitions. [2022-11-22 02:29:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-22 02:29:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 194 transitions. [2022-11-22 02:29:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 02:29:20,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:20,463 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:29:20,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:29:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:20,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1259967279, now seen corresponding path program 1 times [2022-11-22 02:29:20,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:20,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959825295] [2022-11-22 02:29:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:20,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-22 02:29:21,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959825295] [2022-11-22 02:29:21,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959825295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:21,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:21,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:29:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738600983] [2022-11-22 02:29:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:29:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:29:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:29:21,186 INFO L87 Difference]: Start difference. First operand 172 states and 194 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 02:29:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:21,765 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2022-11-22 02:29:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:29:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-22 02:29:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:21,767 INFO L225 Difference]: With dead ends: 182 [2022-11-22 02:29:21,767 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 02:29:21,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:29:21,768 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:21,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:29:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 02:29:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-22 02:29:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.113821138211382) internal successors, (137), 126 states have internal predecessors, (137), 32 states have call successors, (32), 23 states have call predecessors, (32), 24 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-22 02:29:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2022-11-22 02:29:21,907 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 76 [2022-11-22 02:29:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:21,907 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2022-11-22 02:29:21,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 02:29:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2022-11-22 02:29:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:29:21,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:21,909 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2022-11-22 02:29:21,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 02:29:21,909 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1891220550, now seen corresponding path program 1 times [2022-11-22 02:29:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:21,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793033445] [2022-11-22 02:29:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:21,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 02:29:27,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:27,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793033445] [2022-11-22 02:29:27,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793033445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:27,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366630031] [2022-11-22 02:29:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:27,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:27,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:27,638 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:27,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8676f9b8-59f0-40d8-b091-ec8ef2d90f24/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:29:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-22 02:29:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:28,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:28,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:29:28,671 INFO L350 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 27 treesize of output 15 [2022-11-22 02:29:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:28,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-22 02:29:28,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2022-11-22 02:29:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:28,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 18 [2022-11-22 02:29:28,956 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-22 02:29:28,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 106 [2022-11-22 02:29:29,005 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-22 02:29:29,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 111 [2022-11-22 02:29:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 87 treesize of output 77 [2022-11-22 02:29:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-22 02:29:29,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:29:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 16 treesize of output 20 [2022-11-22 02:29:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 18 treesize of output 26 [2022-11-22 02:29:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:29,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 18 treesize of output 26 [2022-11-22 02:29:29,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-11-22 02:29:29,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 13 [2022-11-22 02:29:29,142 INFO L350 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 13 treesize of output 9 [2022-11-22 02:29:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 43 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:29:38,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:21,428 WARN L233 SmtUtils]: Spent 27.17s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:21,921 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse0 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (+ .cse0 8)))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (let ((.cse6 (select (select .cse5 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (select (select .cse5 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)) (+ .cse6 8)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse6 0))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (let ((.cse7 (select (select .cse8 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse7 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select .cse8 .cse7) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1953 Int)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (forall ((v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse10 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (select (select .cse9 .cse10) (+ (select (select .cse9 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse10 0)))))) is different from false [2022-11-22 02:30:30,597 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 23 DAG size of output: 20 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:30:30,597 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-22 02:30:30,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1700 treesize of output 1423 [2022-11-22 02:30:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:31:13,491 WARN L233 SmtUtils]: Spent 42.87s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:31:13,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:31:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1394 treesize of output 1641 [2022-11-22 02:31:34,562 WARN L233 SmtUtils]: Spent 20.91s on a formula simplification. DAG size of input: 359 DAG size of output: 243 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:31:34,564 INFO L321 Elim1Store]: treesize reduction 418, result has 61.3 percent of original size [2022-11-22 02:31:34,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 17311 treesize of output 17189 [2022-11-22 02:31:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:31:38,501 INFO L321 Elim1Store]: treesize reduction 195, result has 53.5 percent of original size [2022-11-22 02:31:38,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 16482 treesize of output 11451 [2022-11-22 02:31:39,952 INFO L217 Elim1Store]: Index analysis took 564 ms [2022-11-22 02:31:43,047 INFO L321 Elim1Store]: treesize reduction 260, result has 8.5 percent of original size [2022-11-22 02:31:43,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 16 case distinctions, treesize of input 14660 treesize of output 14533