./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/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_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 02:46:49,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:46:49,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:46:49,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:46:49,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:46:49,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:46:49,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:46:49,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:46:49,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:46:49,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:46:49,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:46:49,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:46:49,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:46:49,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:46:49,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:46:49,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:46:49,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:46:49,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:46:49,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:46:49,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:46:49,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:46:49,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:46:49,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:46:49,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:46:49,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:46:49,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:46:49,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:46:49,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:46:49,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:46:49,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:46:49,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:46:49,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:46:49,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:46:49,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:46:49,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:46:49,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:46:49,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:46:49,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:46:49,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:46:49,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:46:49,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:46:49,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:46:49,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:46:49,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:46:49,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:46:49,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:46:49,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:46:49,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:46:49,840 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:46:49,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:46:49,840 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:46:49,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:46:49,841 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:46:49,841 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:46:49,841 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:46:49,842 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:46:49,842 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:46:49,842 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:46:49,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:46:49,843 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:46:49,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:46:49,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:46:49,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:46:49,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:46:49,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:46:49,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:46:49,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:46:49,846 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:46:49,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:46:49,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:46:49,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:46:49,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:49,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:46:49,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:46:49,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:46:49,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:46:49,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:46:49,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:46:49,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:46:49,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:46:49,850 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_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-03 02:46:50,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:46:50,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:46:50,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:46:50,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:46:50,291 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:46:50,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-03 02:46:50,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/data/4961d8364/80836418724746fdb7ca82697b4791a3/FLAG2feb9e40f [2022-11-03 02:46:51,355 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:46:51,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-03 02:46:51,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/data/4961d8364/80836418724746fdb7ca82697b4791a3/FLAG2feb9e40f [2022-11-03 02:46:51,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/data/4961d8364/80836418724746fdb7ca82697b4791a3 [2022-11-03 02:46:51,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:46:51,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:46:51,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:51,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:46:51,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:46:51,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:51" (1/1) ... [2022-11-03 02:46:51,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d8ce03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:51, skipping insertion in model container [2022-11-03 02:46:51,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:51" (1/1) ... [2022-11-03 02:46:51,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:46:52,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:46:52,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-03 02:46:52,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-03 02:46:53,513 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,514 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,515 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,517 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,518 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,537 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,538 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,540 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,541 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,544 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,546 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,547 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,548 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:53,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:46:53,999 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:46:54,000 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:46:54,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:46:54,004 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:46:54,005 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:46:54,006 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:46:54,007 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:46:54,008 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:46:54,008 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:46:54,202 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:46:54,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:54,251 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:46:54,268 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-03 02:46:54,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-03 02:46:54,322 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,323 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,323 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,324 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,325 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,336 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,336 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,338 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,339 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,341 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,342 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,343 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,343 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:46:54,417 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:46:54,419 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:46:54,420 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:46:54,421 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:46:54,423 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:46:54,424 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:46:54,425 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:46:54,425 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:46:54,426 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:46:54,427 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:46:54,537 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:46:54,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:54,870 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:46:54,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54 WrapperNode [2022-11-03 02:46:54,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:54,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:54,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:46:54,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:46:54,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:54,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,040 INFO L138 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-11-03 02:46:55,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:55,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:46:55,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:46:55,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:46:55,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:46:55,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:46:55,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:46:55,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:46:55,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (1/1) ... [2022-11-03 02:46:55,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:55,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:55,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:46:55,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:46:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:46:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:46:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:46:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:46:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:46:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:46:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 02:46:55,248 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 02:46:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:46:55,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:46:55,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:46:55,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:46:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:46:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:46:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:46:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:46:55,250 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:46:55,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:46:55,633 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:46:55,645 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:46:55,941 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:46:56,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:46:56,139 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:46:56,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:56 BoogieIcfgContainer [2022-11-03 02:46:56,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:46:56,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:46:56,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:46:56,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:46:56,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:46:51" (1/3) ... [2022-11-03 02:46:56,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ad56f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:56, skipping insertion in model container [2022-11-03 02:46:56,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:54" (2/3) ... [2022-11-03 02:46:56,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ad56f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:56, skipping insertion in model container [2022-11-03 02:46:56,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:56" (3/3) ... [2022-11-03 02:46:56,163 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-03 02:46:56,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:46:56,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:46:56,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:46:56,289 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;@5550dd59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:46:56,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:46:56,295 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) [2022-11-03 02:46:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:46:56,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:56,308 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] [2022-11-03 02:46:56,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2022-11-03 02:46:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:56,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008728344] [2022-11-03 02:46:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:46:57,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008728344] [2022-11-03 02:46:57,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008728344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355918287] [2022-11-03 02:46:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:57,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:57,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:57,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:46:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:46:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:57,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:57,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:46:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:58,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:47:01,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:01,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355918287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:01,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:01,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:47:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512223628] [2022-11-03 02:47:01,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:01,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:47:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:47:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:01,303 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, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:47:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:01,817 INFO L93 Difference]: Finished difference Result 114 states and 169 transitions. [2022-11-03 02:47:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:47:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-03 02:47:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:01,841 INFO L225 Difference]: With dead ends: 114 [2022-11-03 02:47:01,841 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 02:47:01,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:47:01,856 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 15 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:01,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 234 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-11-03 02:47:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 02:47:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2022-11-03 02:47:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:47:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2022-11-03 02:47:01,942 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 37 [2022-11-03 02:47:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:01,944 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2022-11-03 02:47:01,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:47:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2022-11-03 02:47:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:47:01,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:01,951 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] [2022-11-03 02:47:02,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:02,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:02,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2022-11-03 02:47:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:02,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273498308] [2022-11-03 02:47:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:47:02,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273498308] [2022-11-03 02:47:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273498308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926544786] [2022-11-03 02:47:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:02,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:02,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:47:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-03 02:47:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:03,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,397 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:47:03,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_63| input size 65 context size 65 output size 65 [2022-11-03 02:47:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747218662] [2022-11-03 02:47:03,438 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:47:03,438 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:03,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:03,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:03,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,639 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:47:03,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:03,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:03,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 02:47:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,444 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:47:04,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:47:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:04,642 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:47:04,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,831 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:47:04,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:47:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:04,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:47:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:05,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:05,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:06,160 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 02:47:06,485 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 02:47:06,556 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:47:06,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:10,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1747218662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:10,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2022-11-03 02:47:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218070771] [2022-11-03 02:47:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:10,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:47:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:47:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:47:10,353 INFO L87 Difference]: Start difference. First operand 58 states and 78 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) [2022-11-03 02:47:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:11,171 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2022-11-03 02:47:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:47:11,172 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 [2022-11-03 02:47:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:11,173 INFO L225 Difference]: With dead ends: 105 [2022-11-03 02:47:11,173 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:47:11,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:47:11,176 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:11,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-03 02:47:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:47:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-11-03 02:47:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:47:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-11-03 02:47:11,194 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2022-11-03 02:47:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:11,195 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-11-03 02:47:11,195 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) [2022-11-03 02:47:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-11-03 02:47:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:47:11,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:11,197 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] [2022-11-03 02:47:11,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:47:11,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:47:11,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1266222812, now seen corresponding path program 1 times [2022-11-03 02:47:11,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:11,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736982459] [2022-11-03 02:47:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:11,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:11,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736982459] [2022-11-03 02:47:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736982459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:11,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931273690] [2022-11-03 02:47:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:11,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:11,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:11,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:47:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:47:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:47:12,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931273690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:12,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:12,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:47:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263424503] [2022-11-03 02:47:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:47:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:47:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:47:12,078 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-11-03 02:47:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:12,278 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2022-11-03 02:47:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:47:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 39 [2022-11-03 02:47:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:12,280 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:47:12,280 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:47:12,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:12,283 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 149 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 [2022-11-03 02:47:12,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 149 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:47:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 02:47:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:47:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-03 02:47:12,318 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2022-11-03 02:47:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:12,318 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-03 02:47:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-11-03 02:47:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-03 02:47:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:47:12,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:12,324 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] [2022-11-03 02:47:12,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:12,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:12,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash -693180958, now seen corresponding path program 1 times [2022-11-03 02:47:12,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923758227] [2022-11-03 02:47:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:12,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:12,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:12,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923758227] [2022-11-03 02:47:12,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923758227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682265668] [2022-11-03 02:47:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:12,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:12,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:12,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:12,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:47:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:47:13,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:13,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682265668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:13,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:13,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 02:47:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103340659] [2022-11-03 02:47:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:13,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:13,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:13,142 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-03 02:47:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:13,419 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2022-11-03 02:47:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:47:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 41 [2022-11-03 02:47:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:13,421 INFO L225 Difference]: With dead ends: 105 [2022-11-03 02:47:13,422 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:47:13,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:47:13,424 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:13,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 175 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:47:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-03 02:47:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:47:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 02:47:13,444 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2022-11-03 02:47:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:13,444 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 02:47:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-03 02:47:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 02:47:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:47:13,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:13,447 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] [2022-11-03 02:47:13,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:13,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash 938537906, now seen corresponding path program 1 times [2022-11-03 02:47:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:13,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009157709] [2022-11-03 02:47:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:14,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009157709] [2022-11-03 02:47:14,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009157709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360060590] [2022-11-03 02:47:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:14,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:14,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:47:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:47:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:47:14,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:14,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360060590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:14,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:14,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 02:47:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482111217] [2022-11-03 02:47:14,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:47:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:47:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:47:14,304 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-11-03 02:47:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:14,373 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-11-03 02:47:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:47:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 42 [2022-11-03 02:47:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:14,375 INFO L225 Difference]: With dead ends: 106 [2022-11-03 02:47:14,375 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 02:47:14,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:47:14,377 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:14,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 02:47:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-03 02:47:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:47:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-11-03 02:47:14,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2022-11-03 02:47:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:14,404 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-11-03 02:47:14,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-11-03 02:47:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-11-03 02:47:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:47:14,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:14,409 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] [2022-11-03 02:47:14,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:14,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1523962277, now seen corresponding path program 1 times [2022-11-03 02:47:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428669769] [2022-11-03 02:47:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:14,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428669769] [2022-11-03 02:47:14,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428669769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805178239] [2022-11-03 02:47:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:14,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:14,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:47:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:47:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:15,269 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:47:15,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:47:15,301 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:47:15,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:47:15,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 9 [2022-11-03 02:47:15,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:15,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:15,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 13 [2022-11-03 02:47:15,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:43,944 WARN L234 SmtUtils]: Spent 25.80s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:47,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:47,511 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-03 02:47:47,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 77 case distinctions, treesize of input 209 treesize of output 143 [2022-11-03 02:47:47,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:47,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:47,539 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-03 02:47:47,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 140 treesize of output 86 [2022-11-03 02:47:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:47,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:47:53,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805178239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958242934] [2022-11-03 02:47:53,229 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:47:53,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:53,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:53,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:53,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,331 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:47:53,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:47:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,451 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:47:53,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:54,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:47:55,013 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-03 02:47:55,720 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2022-11-03 02:47:55,828 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:47:55,851 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 02:47:55,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:05,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [958242934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:05,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:48:05,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-03 02:48:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795590029] [2022-11-03 02:48:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:05,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:48:05,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:48:05,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:48:05,136 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-11-03 02:48:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:07,768 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2022-11-03 02:48:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:48:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 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 45 [2022-11-03 02:48:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:07,772 INFO L225 Difference]: With dead ends: 115 [2022-11-03 02:48:07,772 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 02:48:07,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:48:07,777 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:07,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 150 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-03 02:48:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 02:48:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-03 02:48:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-03 02:48:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-11-03 02:48:07,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 45 [2022-11-03 02:48:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-11-03 02:48:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-11-03 02:48:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-11-03 02:48:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:48:07,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:07,834 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] [2022-11-03 02:48:07,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:48:08,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:48:08,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2022-11-03 02:48:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:08,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436083797] [2022-11-03 02:48:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:48:08,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436083797] [2022-11-03 02:48:08,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436083797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095235236] [2022-11-03 02:48:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:08,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:08,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:08,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:48:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 02:48:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:08,821 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:48:08,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:08,844 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:48:08,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:48:08,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:08,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:08,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 13 [2022-11-03 02:48:08,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:29,591 WARN L234 SmtUtils]: Spent 18.23s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:48:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095235236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481446334] [2022-11-03 02:48:38,559 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:48:38,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:38,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:38,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:38,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,656 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:48:38,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:48:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,757 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:48:38,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:39,306 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:48:39,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,455 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:48:39,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:48:39,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2022-11-03 02:48:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:48:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:39,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:48:39,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:39,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:41,010 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:48:41,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 163 for LOIs [2022-11-03 02:48:41,608 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:48:41,633 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 02:48:41,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:49:00,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [481446334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:00,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:49:00,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-03 02:49:00,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222388191] [2022-11-03 02:49:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:49:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:49:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1571, Unknown=4, NotChecked=0, Total=1722 [2022-11-03 02:49:00,433 INFO L87 Difference]: Start difference. First operand 67 states and 85 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) [2022-11-03 02:49:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:03,791 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2022-11-03 02:49:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:49:03,792 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 [2022-11-03 02:49:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:03,793 INFO L225 Difference]: With dead ends: 122 [2022-11-03 02:49:03,793 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:49:03,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=162, Invalid=1725, Unknown=5, NotChecked=0, Total=1892 [2022-11-03 02:49:03,797 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:03,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 173 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 87 Unchecked, 0.6s Time] [2022-11-03 02:49:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:49:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-11-03 02:49:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-03 02:49:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-03 02:49:03,828 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 46 [2022-11-03 02:49:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:03,828 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-03 02:49:03,829 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) [2022-11-03 02:49:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-03 02:49:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:49:03,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:03,830 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] [2022-11-03 02:49:03,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:04,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2001458783, now seen corresponding path program 1 times [2022-11-03 02:49:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:04,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887983511] [2022-11-03 02:49:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:49:05,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:05,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887983511] [2022-11-03 02:49:05,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887983511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:05,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64744170] [2022-11-03 02:49:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:05,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:05,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:05,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:05,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:49:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:49:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:16,677 WARN L234 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:49:17,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:49:18,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64744170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63586255] [2022-11-03 02:49:18,215 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:49:18,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:49:18,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:49:18,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:49:18,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:49:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,336 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:49:18,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 02:49:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:19,810 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 135 for LOIs [2022-11-03 02:49:21,054 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 179 for LOIs [2022-11-03 02:49:21,168 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:49:21,191 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:49:21,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:49:43,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [63586255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:43,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:49:43,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-03 02:49:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206804147] [2022-11-03 02:49:43,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:43,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:49:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:49:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1158, Unknown=6, NotChecked=0, Total=1332 [2022-11-03 02:49:43,399 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 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) [2022-11-03 02:49:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:45,773 INFO L93 Difference]: Finished difference Result 143 states and 195 transitions. [2022-11-03 02:49:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:49:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 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 47 [2022-11-03 02:49:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:45,776 INFO L225 Difference]: With dead ends: 143 [2022-11-03 02:49:45,776 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 02:49:45,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=188, Invalid=1288, Unknown=6, NotChecked=0, Total=1482 [2022-11-03 02:49:45,778 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:45,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 157 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 439 Invalid, 0 Unknown, 84 Unchecked, 1.5s Time] [2022-11-03 02:49:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 02:49:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2022-11-03 02:49:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (22), 15 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-03 02:49:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-11-03 02:49:45,834 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 47 [2022-11-03 02:49:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:45,835 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-11-03 02:49:45,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 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) [2022-11-03 02:49:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-11-03 02:49:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:49:45,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:45,837 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] [2022-11-03 02:49:45,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:46,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:49:46,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2022-11-03 02:49:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358160872] [2022-11-03 02:49:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:49:47,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358160872] [2022-11-03 02:49:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358160872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445620482] [2022-11-03 02:49:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:47,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:47,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:47,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:47,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:49:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:49:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:59,425 WARN L234 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:50:00,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:50:01,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445620482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:01,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642469894] [2022-11-03 02:50:01,373 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:50:01,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:50:01,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:50:01,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:50:01,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:50:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,487 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:50:01,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 02:50:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:01,965 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:50:01,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,078 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:50:02,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:50:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-11-03 02:50:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:50:02,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:02,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:50:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:02,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:03,298 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 02:50:04,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 163 for LOIs [2022-11-03 02:50:04,205 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:50:04,225 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:50:04,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:50:30,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [642469894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:30,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:50:30,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-03 02:50:30,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376152891] [2022-11-03 02:50:30,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:30,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:50:30,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:50:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1184, Unknown=7, NotChecked=0, Total=1332 [2022-11-03 02:50:30,213 INFO L87 Difference]: Start difference. First operand 79 states and 103 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) [2022-11-03 02:50:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:30,537 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2022-11-03 02:50:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:50:30,538 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 [2022-11-03 02:50:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:30,540 INFO L225 Difference]: With dead ends: 138 [2022-11-03 02:50:30,540 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 02:50:30,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=149, Invalid=1250, Unknown=7, NotChecked=0, Total=1406 [2022-11-03 02:50:30,542 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:30,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-11-03 02:50:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 02:50:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-03 02:50:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 58 states have internal predecessors, (69), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-03 02:50:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-11-03 02:50:30,580 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 48 [2022-11-03 02:50:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-11-03 02:50:30,581 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) [2022-11-03 02:50:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-11-03 02:50:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:50:30,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:30,582 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] [2022-11-03 02:50:30,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:30,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash -963369005, now seen corresponding path program 1 times [2022-11-03 02:50:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384767543] [2022-11-03 02:50:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:50:31,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384767543] [2022-11-03 02:50:31,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384767543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932273900] [2022-11-03 02:50:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:31,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:31,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:31,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:50:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:50:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:31,458 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:50:31,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:50:31,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 9 [2022-11-03 02:50:31,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:31,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 28 [2022-11-03 02:50:31,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2022-11-03 02:50:53,059 WARN L234 SmtUtils]: Spent 19.46s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:55,603 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:50:55,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 72 [2022-11-03 02:50:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:55,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,621 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:50:55,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 42 [2022-11-03 02:50:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:55,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:51:00,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932273900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385929399] [2022-11-03 02:51:00,396 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:51:00,396 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:00,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:00,397 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:00,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:51:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,467 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:51:00,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:51:00,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,556 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:51:00,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:00,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:02,594 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2022-11-03 02:51:02,673 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 168 for LOIs [2022-11-03 02:51:04,303 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:51:04,305 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:51:04,326 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:51:04,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:51:17,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4572#(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))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#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)) (= 78 (select |#length| 4)) (= (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) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (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))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 16) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 8) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 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_38|) 0)) 16) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 2)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 5)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (= 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_38|) 0)) 24)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 16) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 4)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 32) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 3)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 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|) (= ~tl_last_error~0 0) (= |#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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:51:17,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:51:17,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:17,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2022-11-03 02:51:17,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244043953] [2022-11-03 02:51:17,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:17,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:51:17,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:17,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:51:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:51:17,296 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-03 02:51:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:21,518 INFO L93 Difference]: Finished difference Result 260 states and 428 transitions. [2022-11-03 02:51:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:51:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 48 [2022-11-03 02:51:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:21,522 INFO L225 Difference]: With dead ends: 260 [2022-11-03 02:51:21,522 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 02:51:21,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=495, Invalid=4335, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 02:51:21,526 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 111 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:21,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 724 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1482 Invalid, 0 Unknown, 567 Unchecked, 2.5s Time] [2022-11-03 02:51:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 02:51:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2022-11-03 02:51:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 102 states have internal predecessors, (121), 33 states have call successors, (33), 14 states have call predecessors, (33), 19 states have return successors, (67), 31 states have call predecessors, (67), 32 states have call successors, (67) [2022-11-03 02:51:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 221 transitions. [2022-11-03 02:51:21,608 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 221 transitions. Word has length 48 [2022-11-03 02:51:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:21,608 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 221 transitions. [2022-11-03 02:51:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-03 02:51:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 221 transitions. [2022-11-03 02:51:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:51:21,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:21,610 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] [2022-11-03 02:51:21,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:21,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1615843155, now seen corresponding path program 1 times [2022-11-03 02:51:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506754915] [2022-11-03 02:51:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:51:21,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506754915] [2022-11-03 02:51:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506754915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279710457] [2022-11-03 02:51:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:21,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:21,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:21,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:21,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:51:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:51:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:51:22,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:22,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279710457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:22,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:22,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 02:51:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138945712] [2022-11-03 02:51:22,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:22,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:51:22,287 INFO L87 Difference]: Start difference. First operand 148 states and 221 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) [2022-11-03 02:51:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:22,530 INFO L93 Difference]: Finished difference Result 215 states and 316 transitions. [2022-11-03 02:51:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:51:22,531 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 [2022-11-03 02:51:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:22,532 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:51:22,532 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 02:51:22,533 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 [2022-11-03 02:51:22,534 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:22,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 166 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 02:51:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-03 02:51:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 99 states have internal predecessors, (116), 33 states have call successors, (33), 14 states have call predecessors, (33), 18 states have return successors, (62), 31 states have call predecessors, (62), 32 states have call successors, (62) [2022-11-03 02:51:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-11-03 02:51:22,597 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 52 [2022-11-03 02:51:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:22,598 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-11-03 02:51:22,598 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) [2022-11-03 02:51:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-11-03 02:51:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:51:22,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:22,600 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] [2022-11-03 02:51:22,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:22,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 961107576, now seen corresponding path program 1 times [2022-11-03 02:51:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243957791] [2022-11-03 02:51:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:51:23,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243957791] [2022-11-03 02:51:23,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243957791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981681492] [2022-11-03 02:51:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:23,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:23,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:51:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:51:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:51:23,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:23,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981681492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:23,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:23,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 02:51:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826170911] [2022-11-03 02:51:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:51:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:51:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:51:23,462 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-03 02:51:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:23,765 INFO L93 Difference]: Finished difference Result 215 states and 316 transitions. [2022-11-03 02:51:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:51:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 55 [2022-11-03 02:51:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:23,766 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:51:23,766 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 02:51:23,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:51:23,767 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:23,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 02:51:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-11-03 02:51:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 100 states have internal predecessors, (116), 34 states have call successors, (34), 14 states have call predecessors, (34), 18 states have return successors, (65), 32 states have call predecessors, (65), 33 states have call successors, (65) [2022-11-03 02:51:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 215 transitions. [2022-11-03 02:51:23,847 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 215 transitions. Word has length 55 [2022-11-03 02:51:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 215 transitions. [2022-11-03 02:51:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-03 02:51:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 215 transitions. [2022-11-03 02:51:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:51:23,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:23,849 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] [2022-11-03 02:51:23,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:51:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:51:24,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1875676065, now seen corresponding path program 1 times [2022-11-03 02:51:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725570043] [2022-11-03 02:51:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:51:24,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725570043] [2022-11-03 02:51:24,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725570043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:24,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676953821] [2022-11-03 02:51:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:24,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:24,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:24,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:51:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:51:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:24,709 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:51:24,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:51:24,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 9 [2022-11-03 02:51:24,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:24,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 19 [2022-11-03 02:51:24,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:51:24,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2022-11-03 02:51:52,044 WARN L234 SmtUtils]: Spent 23.31s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:51:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:52:02,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676953821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263938430] [2022-11-03 02:52:02,932 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:52:02,932 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:02,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:02,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:02,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,001 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:52:03,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:52:03,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,092 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:52:03,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:03,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:04,152 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 133 for LOIs [2022-11-03 02:52:05,066 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 187 for LOIs [2022-11-03 02:52:05,134 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:52:05,150 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:52:05,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:52:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [263938430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:12,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:52:12,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 15, 8] total 43 [2022-11-03 02:52:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763377472] [2022-11-03 02:52:12,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:12,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:52:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:52:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1592, Unknown=1, NotChecked=0, Total=1806 [2022-11-03 02:52:12,263 INFO L87 Difference]: Start difference. First operand 147 states and 215 transitions. Second operand has 20 states, 15 states have (on average 1.4666666666666666) 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) [2022-11-03 02:52:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:16,986 INFO L93 Difference]: Finished difference Result 269 states and 407 transitions. [2022-11-03 02:52:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:52:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4666666666666666) 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 59 [2022-11-03 02:52:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:16,989 INFO L225 Difference]: With dead ends: 269 [2022-11-03 02:52:16,989 INFO L226 Difference]: Without dead ends: 207 [2022-11-03 02:52:16,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=302, Invalid=1953, Unknown=1, NotChecked=0, Total=2256 [2022-11-03 02:52:16,991 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:16,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 202 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 199 Unchecked, 1.7s Time] [2022-11-03 02:52:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-03 02:52:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2022-11-03 02:52:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 123 states have internal predecessors, (143), 48 states have call successors, (48), 15 states have call predecessors, (48), 19 states have return successors, (79), 46 states have call predecessors, (79), 47 states have call successors, (79) [2022-11-03 02:52:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 270 transitions. [2022-11-03 02:52:17,132 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 270 transitions. Word has length 59 [2022-11-03 02:52:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:17,132 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 270 transitions. [2022-11-03 02:52:17,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4666666666666666) 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) [2022-11-03 02:52:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 270 transitions. [2022-11-03 02:52:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:52:17,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:17,136 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] [2022-11-03 02:52:17,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:52:17,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash -113358028, now seen corresponding path program 1 times [2022-11-03 02:52:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:17,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664427862] [2022-11-03 02:52:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:52:17,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:17,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664427862] [2022-11-03 02:52:17,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664427862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:52:17,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432700557] [2022-11-03 02:52:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:17,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:17,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:17,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:52:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-03 02:52:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:18,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,092 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:52:18,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_107| input size 46 context size 46 output size 46 [2022-11-03 02:52:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534745972] [2022-11-03 02:52:18,095 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:52:18,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:18,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:18,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:18,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,173 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:52:18,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:52:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,265 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:52:18,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,675 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:52:18,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:52:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:18,736 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:52:18,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,853 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:52:18,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:52:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:52:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2022-11-03 02:52:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-11-03 02:52:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:19,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:19,985 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 02:52:20,736 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 163 for LOIs [2022-11-03 02:52:20,781 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:52:20,801 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:52:20,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:52:25,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1534745972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:25,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:52:25,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 24 [2022-11-03 02:52:25,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380850483] [2022-11-03 02:52:25,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:25,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:52:25,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:52:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:52:25,226 INFO L87 Difference]: Start difference. First operand 185 states and 270 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) [2022-11-03 02:52:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:26,814 INFO L93 Difference]: Finished difference Result 259 states and 361 transitions. [2022-11-03 02:52:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:52:26,818 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 [2022-11-03 02:52:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:26,820 INFO L225 Difference]: With dead ends: 259 [2022-11-03 02:52:26,820 INFO L226 Difference]: Without dead ends: 201 [2022-11-03 02:52:26,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:52:26,822 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:26,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 197 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 390 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2022-11-03 02:52:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-03 02:52:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2022-11-03 02:52:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 120 states have (on average 1.1833333333333333) internal successors, (142), 128 states have internal predecessors, (142), 47 states have call successors, (47), 15 states have call predecessors, (47), 21 states have return successors, (76), 45 states have call predecessors, (76), 46 states have call successors, (76) [2022-11-03 02:52:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 265 transitions. [2022-11-03 02:52:26,929 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 265 transitions. Word has length 60 [2022-11-03 02:52:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 265 transitions. [2022-11-03 02:52:26,930 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) [2022-11-03 02:52:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 265 transitions. [2022-11-03 02:52:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:52:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:26,932 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] [2022-11-03 02:52:26,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:27,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:52:27,158 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -129172476, now seen corresponding path program 1 times [2022-11-03 02:52:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:27,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781074346] [2022-11-03 02:52:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:27,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:52:27,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781074346] [2022-11-03 02:52:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781074346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:52:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065176245] [2022-11-03 02:52:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:27,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:27,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:27,419 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:27,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:52:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 02:52:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:27,880 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:52:27,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:27,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:27,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:27,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:27,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:52:28,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 11 [2022-11-03 02:52:52,645 WARN L234 SmtUtils]: Spent 20.74s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:00,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:53:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065176245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273834440] [2022-11-03 02:53:04,352 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:53:04,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:04,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:04,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:04,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,426 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:53:04,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:53:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,503 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:53:04,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:04,883 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:53:04,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,041 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:53:05,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:53:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:53:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:53:05,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-11-03 02:53:05,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:05,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:07,584 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 02:53:07,604 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:53:08,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:53:08,319 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:53:08,337 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:53:08,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:26,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8879#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137| Int)) (and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24)) 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_137|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_137| 0))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:53:26,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:26,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:26,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 8] total 26 [2022-11-03 02:53:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102005055] [2022-11-03 02:53:26,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:26,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:53:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:53:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2530, Unknown=6, NotChecked=0, Total=2756 [2022-11-03 02:53:26,523 INFO L87 Difference]: Start difference. First operand 189 states and 265 transitions. Second operand has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2022-11-03 02:53:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:29,095 INFO L93 Difference]: Finished difference Result 330 states and 474 transitions. [2022-11-03 02:53:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:53:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 63 [2022-11-03 02:53:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:29,097 INFO L225 Difference]: With dead ends: 330 [2022-11-03 02:53:29,098 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:53:29,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=342, Invalid=4208, Unknown=6, NotChecked=0, Total=4556 [2022-11-03 02:53:29,100 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:29,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 401 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-03 02:53:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:53:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 180. [2022-11-03 02:53:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 118 states have (on average 1.152542372881356) internal successors, (136), 124 states have internal predecessors, (136), 39 states have call successors, (39), 18 states have call predecessors, (39), 22 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2022-11-03 02:53:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 226 transitions. [2022-11-03 02:53:29,222 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 226 transitions. Word has length 63 [2022-11-03 02:53:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:29,223 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 226 transitions. [2022-11-03 02:53:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (24), 5 states have call predecessors, (24), 9 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2022-11-03 02:53:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 226 transitions. [2022-11-03 02:53:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:53:29,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:29,226 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1] [2022-11-03 02:53:29,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:29,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:53:29,427 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1776695341, now seen corresponding path program 1 times [2022-11-03 02:53:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:29,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203320304] [2022-11-03 02:53:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:53:30,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203320304] [2022-11-03 02:53:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203320304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606303738] [2022-11-03 02:53:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:30,194 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:30,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:53:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:53:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:53:30,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:53:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606303738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470270920] [2022-11-03 02:53:30,982 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:53:30,982 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:30,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:30,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:30,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,079 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:53:31,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 02:53:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:53:32,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2022-11-03 02:53:33,030 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:53:33,710 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:53:33,711 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:53:33,728 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:53:33,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:46,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10104#(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))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 24)) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 24)) 0)) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 16)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| 2)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 24)) 0) 16) (<= 0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| 4)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| 3)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| 5)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54| 0)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 1) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_54|) 8) 0))) (= |~#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)) (= 78 (select |#length| 4)) (= (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) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (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))) (= |#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|) (= ~tl_last_error~0 0) (= |#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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:53:46,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:46,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:46,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-03 02:53:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653587416] [2022-11-03 02:53:46,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:53:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:53:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:53:46,497 INFO L87 Difference]: Start difference. First operand 180 states and 226 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-03 02:53:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:48,644 INFO L93 Difference]: Finished difference Result 329 states and 465 transitions. [2022-11-03 02:53:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:53:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-03 02:53:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:48,648 INFO L225 Difference]: With dead ends: 329 [2022-11-03 02:53:48,649 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 02:53:48,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=532, Invalid=5630, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:53:48,651 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 136 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:48,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 566 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:53:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 02:53:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 208. [2022-11-03 02:53:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 143 states have internal predecessors, (159), 48 states have call successors, (48), 18 states have call predecessors, (48), 24 states have return successors, (58), 46 states have call predecessors, (58), 47 states have call successors, (58) [2022-11-03 02:53:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 265 transitions. [2022-11-03 02:53:48,806 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 265 transitions. Word has length 66 [2022-11-03 02:53:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:48,807 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 265 transitions. [2022-11-03 02:53:48,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-03 02:53:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 265 transitions. [2022-11-03 02:53:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:53:48,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:48,809 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] [2022-11-03 02:53:48,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:49,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:53:49,024 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2022-11-03 02:53:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968500256] [2022-11-03 02:53:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:49,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:53:51,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968500256] [2022-11-03 02:53:51,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968500256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638798794] [2022-11-03 02:53:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:51,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:51,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:51,730 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:51,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:53:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-03 02:53:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:55,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:01,561 INFO L356 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2022-11-03 02:54:01,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 78 [2022-11-03 02:54:01,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638798794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:01,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79187356] [2022-11-03 02:54:01,707 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:54:01,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:54:01,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:54:01,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:54:01,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:54:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:01,781 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:54:01,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:54:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:01,886 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:54:01,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:02,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:02,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:54:12,344 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 152 for LOIs [2022-11-03 02:54:12,619 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:54:13,306 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-03 02:54:13,350 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:54:13,367 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:54:13,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:36,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11291#(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))) (= 1 (select |#valid| 5)) (= (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))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98| Int)) (and (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 4)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 2)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0)) 8) 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_98|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 5)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 3)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 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_98|) 0)) 24) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0)) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0)) 16) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 16) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 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_98|) 0)) 16) 0))) (= |~#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)) (= 78 (select |#length| 4)) (= (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) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:54:36,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:36,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:54:36,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-11-03 02:54:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262752955] [2022-11-03 02:54:36,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:54:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:54:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=5421, Unknown=0, NotChecked=0, Total=5852 [2022-11-03 02:54:36,946 INFO L87 Difference]: Start difference. First operand 208 states and 265 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) [2022-11-03 02:54:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:41,037 INFO L93 Difference]: Finished difference Result 386 states and 515 transitions. [2022-11-03 02:54:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:54:41,042 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 [2022-11-03 02:54:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:41,045 INFO L225 Difference]: With dead ends: 386 [2022-11-03 02:54:41,045 INFO L226 Difference]: Without dead ends: 309 [2022-11-03 02:54:41,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=849, Invalid=10493, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:54:41,049 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:41,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 960 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1437 Invalid, 0 Unknown, 610 Unchecked, 1.4s Time] [2022-11-03 02:54:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-03 02:54:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-11-03 02:54:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 186 states have internal predecessors, (207), 56 states have call successors, (56), 24 states have call predecessors, (56), 33 states have return successors, (77), 54 states have call predecessors, (77), 55 states have call successors, (77) [2022-11-03 02:54:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2022-11-03 02:54:41,220 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 67 [2022-11-03 02:54:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:41,221 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2022-11-03 02:54:41,221 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) [2022-11-03 02:54:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2022-11-03 02:54:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:54:41,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:41,222 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] [2022-11-03 02:54:41,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:41,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1989271983, now seen corresponding path program 1 times [2022-11-03 02:54:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748443366] [2022-11-03 02:54:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:54:41,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748443366] [2022-11-03 02:54:41,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748443366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:41,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:41,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:54:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801025170] [2022-11-03 02:54:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:41,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:54:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:54:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:54:41,686 INFO L87 Difference]: Start difference. First operand 265 states and 340 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) [2022-11-03 02:54:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:42,017 INFO L93 Difference]: Finished difference Result 287 states and 367 transitions. [2022-11-03 02:54:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:54:42,018 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 [2022-11-03 02:54:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:42,020 INFO L225 Difference]: With dead ends: 287 [2022-11-03 02:54:42,020 INFO L226 Difference]: Without dead ends: 285 [2022-11-03 02:54:42,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:54:42,021 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:42,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:54:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-03 02:54:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-11-03 02:54:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 177 states have (on average 1.1751412429378532) internal successors, (208), 188 states have internal predecessors, (208), 60 states have call successors, (60), 25 states have call predecessors, (60), 34 states have return successors, (81), 58 states have call predecessors, (81), 59 states have call successors, (81) [2022-11-03 02:54:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 349 transitions. [2022-11-03 02:54:42,205 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 349 transitions. Word has length 70 [2022-11-03 02:54:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:42,206 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 349 transitions. [2022-11-03 02:54:42,206 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) [2022-11-03 02:54:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 349 transitions. [2022-11-03 02:54:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:54:42,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:42,208 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] [2022-11-03 02:54:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:54:42,208 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2027580686, now seen corresponding path program 2 times [2022-11-03 02:54:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904107076] [2022-11-03 02:54:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:42,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:54:44,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904107076] [2022-11-03 02:54:44,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904107076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104758075] [2022-11-03 02:54:44,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:54:44,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:44,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:44,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:44,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:54:44,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:54:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 02:54:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:09,152 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:55:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:55:09,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:09,915 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:55:09,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:09,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:55:09,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:55:10,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104758075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:10,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067018624] [2022-11-03 02:55:10,026 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:55:10,026 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:55:10,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:55:10,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:55:10,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:55:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,107 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:55:10,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 02:55:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:10,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:55:20,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 157 for LOIs [2022-11-03 02:55:20,522 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 02:55:21,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-03 02:55:21,163 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:55:21,180 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:55:21,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:55:41,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13639#(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))) (= 1 (select |#valid| 5)) (= (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))) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |~#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)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#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)) (= 40 (select |#length| 5)) (= (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) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|)) 0) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|)) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) (- 8)))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117| 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|) (- 8))) 0) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_117|)) 0))) (= |#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) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:55:41,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:55:41,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:55:41,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 31 [2022-11-03 02:55:41,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099914289] [2022-11-03 02:55:41,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:41,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:55:41,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:55:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:55:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=3065, Unknown=7, NotChecked=0, Total=3422 [2022-11-03 02:55:41,487 INFO L87 Difference]: Start difference. First operand 272 states and 349 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2022-11-03 02:55:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:59,895 INFO L93 Difference]: Finished difference Result 537 states and 753 transitions. [2022-11-03 02:55:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:55:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) Word has length 73 [2022-11-03 02:55:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:59,898 INFO L225 Difference]: With dead ends: 537 [2022-11-03 02:55:59,898 INFO L226 Difference]: Without dead ends: 386 [2022-11-03 02:55:59,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 184 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 62.1s TimeCoverageRelationStatistics Valid=656, Invalid=5809, Unknown=15, NotChecked=0, Total=6480 [2022-11-03 02:55:59,901 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 219 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:59,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1109 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1327 Invalid, 0 Unknown, 527 Unchecked, 1.3s Time] [2022-11-03 02:55:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-03 02:56:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2022-11-03 02:56:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 201 states have (on average 1.144278606965174) internal successors, (230), 215 states have internal predecessors, (230), 61 states have call successors, (61), 29 states have call predecessors, (61), 41 states have return successors, (84), 59 states have call predecessors, (84), 60 states have call successors, (84) [2022-11-03 02:56:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 375 transitions. [2022-11-03 02:56:00,068 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 375 transitions. Word has length 73 [2022-11-03 02:56:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:00,069 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 375 transitions. [2022-11-03 02:56:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2022-11-03 02:56:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 375 transitions. [2022-11-03 02:56:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:56:00,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:00,071 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, 1] [2022-11-03 02:56:00,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:56:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:56:00,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash 347135943, now seen corresponding path program 1 times [2022-11-03 02:56:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:56:00,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795500895] [2022-11-03 02:56:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:56:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:56:01,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:56:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795500895] [2022-11-03 02:56:01,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795500895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:56:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33571519] [2022-11-03 02:56:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:01,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:56:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:56:01,661 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:56:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:56:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:56:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:56:04,263 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|)))) is different from true [2022-11-03 02:56:06,380 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_259| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_259|) 0) 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_259| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_259| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_259|) 0))))) is different from true [2022-11-03 02:56:08,487 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88|) 0))))) is different from true [2022-11-03 02:56:18,561 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:56:32,645 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:56:42,740 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:56:52,877 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:57:00,985 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:57:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-03 02:57:01,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:57:03,664 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:57:03,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 31 [2022-11-03 02:57:03,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:57:03,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 25 [2022-11-03 02:57:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:57:03,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33571519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233058159] [2022-11-03 02:57:03,757 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:57:03,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:57:03,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:57:03,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:57:03,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:57:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:03,831 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:57:03,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:57:03,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:03,906 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:57:03,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:57:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:57:04,286 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:57:04,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,392 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:57:04,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:57:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2022-11-03 02:57:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:57:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2022-11-03 02:57:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-11-03 02:57:04,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:57:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:57:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:04,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:57:05,914 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-03 02:57:05,926 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-11-03 02:57:06,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:57:06,969 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:57:06,986 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:57:07,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:57:14,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15433#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:57:14,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:57:14,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:57:14,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 14] total 35 [2022-11-03 02:57:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791895639] [2022-11-03 02:57:14,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:57:14,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:57:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:57:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:57:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3170, Unknown=10, NotChecked=348, Total=3782 [2022-11-03 02:57:14,169 INFO L87 Difference]: Start difference. First operand 304 states and 375 transitions. Second operand has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-03 02:58:29,551 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:58:45,626 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:58:59,688 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:59:09,756 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:59:11,764 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_97|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_90|)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_88|) 0)))))) is different from true [2022-11-03 02:59:23,823 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:59:36,151 WARN L234 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:59:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:59:37,280 INFO L93 Difference]: Finished difference Result 471 states and 582 transitions. [2022-11-03 02:59:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:59:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) Word has length 74 [2022-11-03 02:59:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:59:37,283 INFO L225 Difference]: With dead ends: 471 [2022-11-03 02:59:37,283 INFO L226 Difference]: Without dead ends: 279 [2022-11-03 02:59:37,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 179 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 209.6s TimeCoverageRelationStatistics Valid=528, Invalid=6404, Unknown=56, NotChecked=668, Total=7656 [2022-11-03 02:59:37,285 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 166 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:59:37,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 680 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1234 Invalid, 0 Unknown, 655 Unchecked, 1.4s Time] [2022-11-03 02:59:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-03 02:59:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 243. [2022-11-03 02:59:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 172 states have internal predecessors, (187), 46 states have call successors, (46), 26 states have call predecessors, (46), 32 states have return successors, (55), 44 states have call predecessors, (55), 45 states have call successors, (55) [2022-11-03 02:59:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2022-11-03 02:59:37,421 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 74 [2022-11-03 02:59:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:59:37,421 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2022-11-03 02:59:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-03 02:59:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2022-11-03 02:59:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:59:37,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:59:37,423 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 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] [2022-11-03 02:59:37,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:59:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:37,650 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:59:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:59:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1010269368, now seen corresponding path program 1 times [2022-11-03 02:59:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:59:37,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967355515] [2022-11-03 02:59:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:37,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:59:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:59:39,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:59:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967355515] [2022-11-03 02:59:39,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967355515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:59:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480543131] [2022-11-03 02:59:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:59:39,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:59:39,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:59:39,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27da8076-5f48-4d90-b17c-0ba56aae2f1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:59:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:59:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:06,852 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:00:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:00:07,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:00:07,915 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:00:07,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:07,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:00:07,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:00:08,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480543131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:00:08,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016082527] [2022-11-03 03:00:08,003 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:00:08,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:00:08,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:00:08,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:00:08,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:00:08,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,100 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:00:08,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-11-03 03:00:08,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:00:08,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:00:18,318 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 152 for LOIs [2022-11-03 03:00:18,556 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-03 03:00:19,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-03 03:00:19,427 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 03:00:19,444 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:00:19,501 INFO L180 IcfgInterpreter]: Interpretation finished