./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh --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 f77b746008f8945d6b8e05796af79a5acefb89d87a5a0c6bf7d985df753c1b0e --- 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-2329fc7 [2022-12-14 15:21:39,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:21:39,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:21:39,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:21:39,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:21:39,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:21:39,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:21:39,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:21:39,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:21:39,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:21:39,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:21:39,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:21:39,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:21:39,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:21:39,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:21:39,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:21:39,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:21:39,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:21:39,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:21:39,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:21:39,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:21:39,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:21:39,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:21:39,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:21:39,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:21:39,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:21:39,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:21:39,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:21:39,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:21:39,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:21:39,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:21:39,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:21:39,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:21:39,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:21:39,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:21:39,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:21:39,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:21:39,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:21:39,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:21:39,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:21:39,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:21:39,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 15:21:39,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:21:39,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:21:39,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:21:39,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:21:39,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:21:39,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:21:39,747 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:21:39,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:21:39,747 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:21:39,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:21:39,748 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:21:39,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:21:39,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:21:39,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:21:39,748 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:21:39,748 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:21:39,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:21:39,749 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:21:39,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:21:39,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:21:39,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:21:39,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:21:39,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:21:39,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:21:39,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:21:39,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:21:39,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:21:39,752 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_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77b746008f8945d6b8e05796af79a5acefb89d87a5a0c6bf7d985df753c1b0e [2022-12-14 15:21:39,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:21:39,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:21:39,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:21:39,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:21:39,935 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:21:39,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2022-12-14 15:21:42,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:21:42,876 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:21:42,877 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2022-12-14 15:21:42,892 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/data/91cdb80b0/67259f16f6064e4c8379b103ac041f82/FLAG9107753f0 [2022-12-14 15:21:42,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/data/91cdb80b0/67259f16f6064e4c8379b103ac041f82 [2022-12-14 15:21:42,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:21:42,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:21:42,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:21:42,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:21:42,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:21:42,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:21:42" (1/1) ... [2022-12-14 15:21:42,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cad4bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:42, skipping insertion in model container [2022-12-14 15:21:42,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:21:42" (1/1) ... [2022-12-14 15:21:42,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:21:42,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:21:43,181 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2022-12-14 15:21:43,187 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2022-12-14 15:21:43,736 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 15:21:43,743 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,744 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,745 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,745 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,747 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,762 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,763 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,765 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,766 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,768 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,769 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,770 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,770 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:43,825 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:43,825 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:43,826 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:43,831 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 15:21:43,833 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 15:21:43,834 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 15:21:44,037 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 15:21:44,038 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 15:21:44,039 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 15:21:44,040 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 15:21:44,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 15:21:44,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 15:21:44,044 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 15:21:44,044 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 15:21:44,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 15:21:44,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 15:21:44,046 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 15:21:44,154 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 15:21:44,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:21:44,192 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:21:44,203 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2022-12-14 15:21:44,203 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2022-12-14 15:21:44,238 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 15:21:44,242 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,242 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,243 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,243 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,244 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,251 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,251 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,252 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,253 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,254 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,255 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,255 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,255 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:44,260 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:44,260 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:44,260 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:44,263 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 15:21:44,264 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 15:21:44,264 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 15:21:44,292 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 15:21:44,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 15:21:44,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 15:21:44,294 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 15:21:44,295 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 15:21:44,296 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 15:21:44,297 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 15:21:44,297 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 15:21:44,298 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 15:21:44,298 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 15:21:44,298 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 15:21:44,319 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 15:21:44,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:21:44,465 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:21:44,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44 WrapperNode [2022-12-14 15:21:44,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:21:44,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:21:44,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:21:44,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:21:44,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,550 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-12-14 15:21:44,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:21:44,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:21:44,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:21:44,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:21:44,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:21:44,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:21:44,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:21:44,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:21:44,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (1/1) ... [2022-12-14 15:21:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:21:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:44,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:21:44,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:21:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 15:21:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 15:21:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:21:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:21:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 15:21:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 15:21:44,654 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 15:21:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:21:44,833 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:21:44,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:21:45,039 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:21:45,132 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:21:45,132 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 15:21:45,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:45 BoogieIcfgContainer [2022-12-14 15:21:45,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:21:45,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:21:45,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:21:45,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:21:45,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:21:42" (1/3) ... [2022-12-14 15:21:45,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545269d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:21:45, skipping insertion in model container [2022-12-14 15:21:45,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:44" (2/3) ... [2022-12-14 15:21:45,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545269d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:21:45, skipping insertion in model container [2022-12-14 15:21:45,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:45" (3/3) ... [2022-12-14 15:21:45,143 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness_negated.i [2022-12-14 15:21:45,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:21:45,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:21:45,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:21:45,211 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;@51411d17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:21:45,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:21:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-12-14 15:21:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 15:21:45,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:45,222 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] [2022-12-14 15:21:45,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-12-14 15:21:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:45,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606470964] [2022-12-14 15:21:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:45,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606470964] [2022-12-14 15:21:45,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606470964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909184219] [2022-12-14 15:21:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:45,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:21:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:21:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:45,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909184219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:45,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:45,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-12-14 15:21:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362640911] [2022-12-14 15:21:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:21:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:21:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:45,859 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:21:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:45,963 INFO L93 Difference]: Finished difference Result 83 states and 115 transitions. [2022-12-14 15:21:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:21:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-12-14 15:21:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:45,972 INFO L225 Difference]: With dead ends: 83 [2022-12-14 15:21:45,972 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 15:21:45,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:45,977 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:45,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 168 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 15:21:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-14 15:21:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-12-14 15:21:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2022-12-14 15:21:46,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 37 [2022-12-14 15:21:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:46,011 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2022-12-14 15:21:46,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:21:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2022-12-14 15:21:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:21:46,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:46,013 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] [2022-12-14 15:21:46,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 15:21:46,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2022-12-14 15:21:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782053197] [2022-12-14 15:21:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:46,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782053197] [2022-12-14 15:21:46,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782053197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352756404] [2022-12-14 15:21:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:46,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:46,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:21:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:21:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:46,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:46,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352756404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:46,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:46,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:21:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444826320] [2022-12-14 15:21:46,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:46,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:46,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:46,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:21:46,592 INFO L87 Difference]: Start difference. First operand 45 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) [2022-12-14 15:21:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:46,713 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2022-12-14 15:21:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:21:46,714 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 [2022-12-14 15:21:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:46,715 INFO L225 Difference]: With dead ends: 84 [2022-12-14 15:21:46,715 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 15:21:46,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:21:46,717 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:46,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 144 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 15:21:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-14 15:21:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-12-14 15:21:46,724 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 39 [2022-12-14 15:21:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:46,724 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-12-14 15:21:46,725 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) [2022-12-14 15:21:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-12-14 15:21:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:21:46,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:46,726 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] [2022-12-14 15:21:46,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:46,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:46,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2022-12-14 15:21:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:46,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879333352] [2022-12-14 15:21:46,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:46,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:47,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879333352] [2022-12-14 15:21:47,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879333352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628892376] [2022-12-14 15:21:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:47,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:47,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:47,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:47,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:21:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:21:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:47,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628892376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:47,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:47,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 15:21:47,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238884087] [2022-12-14 15:21:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:21:47,268 INFO L87 Difference]: Start difference. First operand 48 states and 64 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) [2022-12-14 15:21:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:47,428 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2022-12-14 15:21:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:47,428 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 [2022-12-14 15:21:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:47,430 INFO L225 Difference]: With dead ends: 99 [2022-12-14 15:21:47,430 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 15:21:47,430 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 [2022-12-14 15:21:47,431 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:47,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 169 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 15:21:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-12-14 15:21:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-12-14 15:21:47,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 41 [2022-12-14 15:21:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:47,438 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-12-14 15:21:47,438 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) [2022-12-14 15:21:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-12-14 15:21:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:21:47,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:47,439 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] [2022-12-14 15:21:47,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:21:47,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 15:21:47,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2022-12-14 15:21:47,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:47,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119707649] [2022-12-14 15:21:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:47,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119707649] [2022-12-14 15:21:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119707649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398014395] [2022-12-14 15:21:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:47,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:47,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:21:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:21:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:21:48,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:48,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398014395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:48,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:48,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 15:21:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267139524] [2022-12-14 15:21:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:21:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:21:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:48,071 INFO L87 Difference]: Start difference. First operand 50 states and 67 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) [2022-12-14 15:21:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:48,115 INFO L93 Difference]: Finished difference Result 100 states and 142 transitions. [2022-12-14 15:21:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:21:48,115 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 [2022-12-14 15:21:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:48,116 INFO L225 Difference]: With dead ends: 100 [2022-12-14 15:21:48,116 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:21:48,117 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 [2022-12-14 15:21:48,118 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:48,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:21:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:21:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-12-14 15:21:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-12-14 15:21:48,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 42 [2022-12-14 15:21:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:48,127 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-12-14 15:21:48,128 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) [2022-12-14 15:21:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-12-14 15:21:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:21:48,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:48,129 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] [2022-12-14 15:21:48,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:21:48,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:48,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2022-12-14 15:21:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:48,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810842209] [2022-12-14 15:21:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:48,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810842209] [2022-12-14 15:21:48,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810842209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274026954] [2022-12-14 15:21:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:48,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:48,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:48,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:21:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:21:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:48,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:48,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274026954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:48,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:48,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:21:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327358481] [2022-12-14 15:21:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:21:48,731 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:48,813 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2022-12-14 15:21:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-12-14 15:21:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:48,814 INFO L225 Difference]: With dead ends: 99 [2022-12-14 15:21:48,815 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 15:21:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:48,816 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:48,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 214 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 15:21:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-12-14 15:21:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2022-12-14 15:21:48,826 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 45 [2022-12-14 15:21:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:48,826 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2022-12-14 15:21:48,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2022-12-14 15:21:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:21:48,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:48,828 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] [2022-12-14 15:21:48,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:21:49,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:49,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2022-12-14 15:21:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495067546] [2022-12-14 15:21:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:49,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:49,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495067546] [2022-12-14 15:21:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495067546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353750333] [2022-12-14 15:21:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:49,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:49,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:21:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:21:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:49,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:49,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353750333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:49,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:49,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 15:21:49,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223202654] [2022-12-14 15:21:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:21:49,892 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:49,996 INFO L93 Difference]: Finished difference Result 104 states and 141 transitions. [2022-12-14 15:21:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:21:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2022-12-14 15:21:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:49,997 INFO L225 Difference]: With dead ends: 104 [2022-12-14 15:21:49,997 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 15:21:49,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:21:49,999 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:49,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 260 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 15:21:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-12-14 15:21:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-12-14 15:21:50,008 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 47 [2022-12-14 15:21:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:50,008 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-12-14 15:21:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-12-14 15:21:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 15:21:50,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:50,010 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] [2022-12-14 15:21:50,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:21:50,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:50,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2022-12-14 15:21:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786424141] [2022-12-14 15:21:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:50,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786424141] [2022-12-14 15:21:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786424141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797706756] [2022-12-14 15:21:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:50,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:50,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:50,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:50,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:21:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:21:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:21:50,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797706756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:50,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:50,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-12-14 15:21:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112901935] [2022-12-14 15:21:50,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:50,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:21:50,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:21:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:50,608 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:50,658 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2022-12-14 15:21:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:21:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 48 [2022-12-14 15:21:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:50,660 INFO L225 Difference]: With dead ends: 94 [2022-12-14 15:21:50,660 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 15:21:50,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:50,661 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:50,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 164 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:21:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 15:21:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 15:21:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-14 15:21:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2022-12-14 15:21:50,669 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 48 [2022-12-14 15:21:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:50,670 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2022-12-14 15:21:50,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2022-12-14 15:21:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:21:50,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:50,671 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:50,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:21:50,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 15:21:50,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:50,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1121524683, now seen corresponding path program 1 times [2022-12-14 15:21:50,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:50,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345600439] [2022-12-14 15:21:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:50,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:50,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345600439] [2022-12-14 15:21:50,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345600439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22852602] [2022-12-14 15:21:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:50,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:21:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:21:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:51,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22852602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:51,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:51,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 15:21:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351343114] [2022-12-14 15:21:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:21:51,185 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-12-14 15:21:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:51,311 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-12-14 15:21:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 50 [2022-12-14 15:21:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:51,312 INFO L225 Difference]: With dead ends: 101 [2022-12-14 15:21:51,312 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 15:21:51,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:21:51,314 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:51,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 15:21:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 15:21:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 37 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-14 15:21:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-12-14 15:21:51,321 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 50 [2022-12-14 15:21:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:51,321 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-12-14 15:21:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-12-14 15:21:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-12-14 15:21:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 15:21:51,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:51,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:51,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:21:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:51,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1473411471, now seen corresponding path program 1 times [2022-12-14 15:21:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61892909] [2022-12-14 15:21:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:51,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61892909] [2022-12-14 15:21:51,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61892909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829483521] [2022-12-14 15:21:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:51,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:51,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:51,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:51,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:21:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:21:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:51,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:51,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829483521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:51,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:51,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 15:21:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241035657] [2022-12-14 15:21:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:51,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:21:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:21:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:21:51,961 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:52,118 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2022-12-14 15:21:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-12-14 15:21:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:52,120 INFO L225 Difference]: With dead ends: 103 [2022-12-14 15:21:52,120 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 15:21:52,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:52,121 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 178 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 15:21:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-12-14 15:21:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-12-14 15:21:52,126 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 52 [2022-12-14 15:21:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:52,126 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-12-14 15:21:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-12-14 15:21:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 15:21:52,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:52,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-12-14 15:21:52,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:21:52,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:52,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1126327094, now seen corresponding path program 1 times [2022-12-14 15:21:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:52,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879583810] [2022-12-14 15:21:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:52,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:21:52,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:52,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879583810] [2022-12-14 15:21:52,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879583810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:52,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433140477] [2022-12-14 15:21:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:52,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:52,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:52,463 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:21:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:21:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 15:21:52,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:52,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433140477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:52,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:52,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:21:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33574514] [2022-12-14 15:21:52,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:52,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:21:52,635 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:52,709 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2022-12-14 15:21:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 56 [2022-12-14 15:21:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:52,710 INFO L225 Difference]: With dead ends: 91 [2022-12-14 15:21:52,711 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 15:21:52,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:52,712 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:52,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 15:21:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-12-14 15:21:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-12-14 15:21:52,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 56 [2022-12-14 15:21:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:52,717 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-12-14 15:21:52,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-12-14 15:21:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:21:52,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:52,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2022-12-14 15:21:52,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:52,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:21:52,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1290419280, now seen corresponding path program 2 times [2022-12-14 15:21:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:52,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066364448] [2022-12-14 15:21:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:52,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:53,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:53,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066364448] [2022-12-14 15:21:53,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066364448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460148487] [2022-12-14 15:21:53,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:21:53,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:53,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:53,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:21:53,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 15:21:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:21:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:21:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:21:53,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:53,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460148487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:53,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:53,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-12-14 15:21:53,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956865468] [2022-12-14 15:21:53,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:53,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:53,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:21:53,453 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-14 15:21:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:53,510 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-12-14 15:21:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:21:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 58 [2022-12-14 15:21:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:53,512 INFO L225 Difference]: With dead ends: 62 [2022-12-14 15:21:53,512 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 15:21:53,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:53,513 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:53,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:21:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 15:21:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-12-14 15:21:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-12-14 15:21:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2022-12-14 15:21:53,520 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 58 [2022-12-14 15:21:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:53,520 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2022-12-14 15:21:53,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-14 15:21:53,521 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2022-12-14 15:21:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:21:53,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:53,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:53,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:21:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:53,723 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1346863439, now seen corresponding path program 1 times [2022-12-14 15:21:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564699849] [2022-12-14 15:21:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:54,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564699849] [2022-12-14 15:21:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564699849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243599498] [2022-12-14 15:21:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:54,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:54,106 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:54,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:21:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:21:54,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243599498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:54,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:54,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2022-12-14 15:21:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664323298] [2022-12-14 15:21:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:54,335 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 15:21:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:54,438 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-12-14 15:21:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2022-12-14 15:21:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:54,439 INFO L225 Difference]: With dead ends: 104 [2022-12-14 15:21:54,439 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:21:54,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:21:54,440 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:54,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 237 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:21:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-12-14 15:21:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 15:21:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-12-14 15:21:54,445 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 64 [2022-12-14 15:21:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:54,445 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-12-14 15:21:54,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 15:21:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-12-14 15:21:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 15:21:54,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:54,446 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 15:21:54,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:54,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -249636200, now seen corresponding path program 1 times [2022-12-14 15:21:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:54,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758599706] [2022-12-14 15:21:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:56,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758599706] [2022-12-14 15:21:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758599706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820814592] [2022-12-14 15:21:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:56,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:56,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:21:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 15:21:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:22:05,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:22:08,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820814592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:22:08,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154569202] [2022-12-14 15:22:08,797 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-12-14 15:22:08,797 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:22:08,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:22:08,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:22:08,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:22:08,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:08,889 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 15:22:08,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 15:22:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:08,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 15:22:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 15:22:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 15:22:09,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 15:22:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 15:22:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 15:22:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 15:22:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 15:22:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:09,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 15:22:10,809 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 194 for LOIs [2022-12-14 15:22:11,148 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-12-14 15:22:11,692 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 15:22:11,693 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 15:22:11,705 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 15:22:11,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:22:24,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4902#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18| Int)) (and (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 24) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 8) 0) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 24)) 0) 16) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 24)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 8) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|) 1))) (= (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) (= (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))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 15:22:24,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:22:24,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:22:24,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 36 [2022-12-14 15:22:24,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022199576] [2022-12-14 15:22:24,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:22:24,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 15:22:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:22:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 15:22:24,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3726, Unknown=1, NotChecked=0, Total=4160 [2022-12-14 15:22:24,895 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2022-12-14 15:22:27,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:22:29,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:22:31,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:22:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:37,695 INFO L93 Difference]: Finished difference Result 200 states and 295 transitions. [2022-12-14 15:22:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 15:22:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) Word has length 65 [2022-12-14 15:22:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:37,698 INFO L225 Difference]: With dead ends: 200 [2022-12-14 15:22:37,698 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 15:22:37,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2967 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=906, Invalid=7283, Unknown=1, NotChecked=0, Total=8190 [2022-12-14 15:22:37,700 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 265 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 404 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:37,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 592 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2027 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2022-12-14 15:22:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 15:22:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2022-12-14 15:22:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 34 states have call successors, (34), 10 states have call predecessors, (34), 14 states have return successors, (45), 32 states have call predecessors, (45), 32 states have call successors, (45) [2022-12-14 15:22:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2022-12-14 15:22:37,736 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 65 [2022-12-14 15:22:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:37,736 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2022-12-14 15:22:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 4 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2022-12-14 15:22:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2022-12-14 15:22:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 15:22:37,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:37,737 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, 1] [2022-12-14 15:22:37,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:22:37,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:22:37,938 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1298768452, now seen corresponding path program 1 times [2022-12-14 15:22:37,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:22:37,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608110080] [2022-12-14 15:22:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:37,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:22:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:22:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 15:22:38,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:22:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608110080] [2022-12-14 15:22:38,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608110080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:22:38,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:22:38,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:22:38,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258985540] [2022-12-14 15:22:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:22:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:22:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:22:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:22:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:22:38,221 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-12-14 15:22:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:38,352 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2022-12-14 15:22:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:22:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 68 [2022-12-14 15:22:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:38,353 INFO L225 Difference]: With dead ends: 140 [2022-12-14 15:22:38,353 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 15:22:38,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:22:38,354 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:38,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 237 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:22:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 15:22:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2022-12-14 15:22:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 87 states have internal predecessors, (94), 37 states have call successors, (37), 12 states have call predecessors, (37), 18 states have return successors, (54), 35 states have call predecessors, (54), 35 states have call successors, (54) [2022-12-14 15:22:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 185 transitions. [2022-12-14 15:22:38,384 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 185 transitions. Word has length 68 [2022-12-14 15:22:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:38,384 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 185 transitions. [2022-12-14 15:22:38,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-12-14 15:22:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 185 transitions. [2022-12-14 15:22:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:22:38,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:38,385 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:22:38,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 15:22:38,386 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2118844566, now seen corresponding path program 1 times [2022-12-14 15:22:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:22:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147346189] [2022-12-14 15:22:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:22:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:22:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 15:22:38,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:22:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147346189] [2022-12-14 15:22:38,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147346189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620612657] [2022-12-14 15:22:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:38,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:22:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:22:38,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:22:38,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:22:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:22:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:22:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:39,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 15:22:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:39,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:22:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 15:22:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:39,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 15:22:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 15:22:39,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:39,585 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1117 (Array Int Int)) (v_ArrVal_1116 (Array Int Int)) (v_ArrVal_1114 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1117) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1116) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1114)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)))) is different from false [2022-12-14 15:22:39,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:22:39,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:22:39,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:22:39,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-12-14 15:22:39,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-12-14 15:22:39,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-12-14 15:22:39,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 15:22:39,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 15:22:39,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:22:39,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-14 15:22:39,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2022-12-14 15:22:39,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 15:22:39,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:22:39,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-12-14 15:22:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 1 not checked. [2022-12-14 15:22:39,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620612657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:22:39,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113173178] [2022-12-14 15:22:39,907 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 15:22:39,907 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:22:39,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:22:39,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:22:39,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:22:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:39,957 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 15:22:39,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 15:22:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,004 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 15:22:40,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 15:22:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 15:22:40,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 15:22:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 15:22:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 15:22:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:40,274 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 15:22:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 15:22:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 15:22:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 15:22:40,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,399 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 15:22:40,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-12-14 15:22:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,476 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 15:22:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 15:22:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 15:22:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 15:22:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 15:22:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 15:22:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 15:22:40,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 15:22:40,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 15:22:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 15:22:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 15:22:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 15:22:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:40,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 15:22:40,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 15:22:40,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 15:22:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 15:22:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 15:22:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 15:22:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:40,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 15:22:41,861 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-12-14 15:22:41,897 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-12-14 15:22:43,083 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-12-14 15:22:43,087 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 15:22:43,101 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 15:22:43,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:22:50,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6339#(and (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#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) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:22:50,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:22:50,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:22:50,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-12-14 15:22:50,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909150258] [2022-12-14 15:22:50,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:22:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 15:22:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:22:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 15:22:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3086, Unknown=1, NotChecked=112, Total=3422 [2022-12-14 15:22:50,541 INFO L87 Difference]: Start difference. First operand 135 states and 185 transitions. Second operand has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2022-12-14 15:22:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:52,345 INFO L93 Difference]: Finished difference Result 311 states and 403 transitions. [2022-12-14 15:22:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 15:22:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) Word has length 70 [2022-12-14 15:22:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:52,347 INFO L225 Difference]: With dead ends: 311 [2022-12-14 15:22:52,347 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 15:22:52,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 163 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=421, Invalid=4984, Unknown=1, NotChecked=144, Total=5550 [2022-12-14 15:22:52,348 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 267 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:52,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 751 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1344 Invalid, 0 Unknown, 116 Unchecked, 1.1s Time] [2022-12-14 15:22:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 15:22:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 172. [2022-12-14 15:22:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 106 states have (on average 1.179245283018868) internal successors, (125), 116 states have internal predecessors, (125), 40 states have call successors, (40), 17 states have call predecessors, (40), 25 states have return successors, (55), 38 states have call predecessors, (55), 37 states have call successors, (55) [2022-12-14 15:22:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 220 transitions. [2022-12-14 15:22:52,389 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 220 transitions. Word has length 70 [2022-12-14 15:22:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:52,389 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 220 transitions. [2022-12-14 15:22:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2022-12-14 15:22:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 220 transitions. [2022-12-14 15:22:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:22:52,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:52,390 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] [2022-12-14 15:22:52,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:22:52,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:22:52,591 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-12-14 15:22:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:22:52,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623326244] [2022-12-14 15:22:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:22:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:22:52,645 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 15:22:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:22:52,720 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 15:22:52,721 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 15:22:52,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 15:22:52,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:22:52,725 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:22:52,728 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 15:22:52,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:22:52 BoogieIcfgContainer [2022-12-14 15:22:52,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 15:22:52,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 15:22:52,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 15:22:52,781 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 15:22:52,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:45" (3/4) ... [2022-12-14 15:22:52,783 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 15:22:52,838 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 15:22:52,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 15:22:52,838 INFO L158 Benchmark]: Toolchain (without parser) took 69931.00ms. Allocated memory was 109.1MB in the beginning and 339.7MB in the end (delta: 230.7MB). Free memory was 69.9MB in the beginning and 199.8MB in the end (delta: -129.8MB). Peak memory consumption was 101.7MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1556.63ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 69.7MB in the beginning and 65.0MB in the end (delta: 4.6MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.38ms. Allocated memory is still 134.2MB. Free memory was 65.0MB in the beginning and 59.4MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: Boogie Preprocessor took 36.85ms. Allocated memory is still 134.2MB. Free memory was 59.4MB in the beginning and 56.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: RCFGBuilder took 546.51ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 56.7MB in the beginning and 88.9MB in the end (delta: -32.2MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,839 INFO L158 Benchmark]: TraceAbstraction took 67643.99ms. Allocated memory was 161.5MB in the beginning and 339.7MB in the end (delta: 178.3MB). Free memory was 87.9MB in the beginning and 206.1MB in the end (delta: -118.2MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,840 INFO L158 Benchmark]: Witness Printer took 56.95ms. Allocated memory is still 339.7MB. Free memory was 206.1MB in the beginning and 199.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 15:22:52,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1556.63ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 69.7MB in the beginning and 65.0MB in the end (delta: 4.6MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.38ms. Allocated memory is still 134.2MB. Free memory was 65.0MB in the beginning and 59.4MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.85ms. Allocated memory is still 134.2MB. Free memory was 59.4MB in the beginning and 56.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 546.51ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 56.7MB in the beginning and 88.9MB in the end (delta: -32.2MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * TraceAbstraction took 67643.99ms. Allocated memory was 161.5MB in the beginning and 339.7MB in the end (delta: 178.3MB). Free memory was 87.9MB in the beginning and 206.1MB in the end (delta: -118.2MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. * Witness Printer took 56.95ms. Allocated memory is still 339.7MB. Free memory was 206.1MB in the beginning and 199.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6913-L6918] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7358] static __thread int tl_last_error = 0; [L7392] CALL aws_linked_list_rend_harness() [L7376] struct aws_linked_list list; [L7378] CALL ensure_linked_list_is_allocated(&list, 20) [L6755] CALL, EXPR nondet_uint64_t() VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L266] return __VERIFIER_nondet_ulong(); [L6755] RET, EXPR nondet_uint64_t() VAL [\old(max_length)=20, list={6:0}, list={6:0}, max_length=20, nondet_uint64_t()=18446744073709551616, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6755] size_t length = nondet_uint64_t(); [L6756] CALL assume_abort_if_not(length <= max_length) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L6756] RET assume_abort_if_not(length <= max_length) VAL [\old(max_length)=20, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6758-L6759] list->head.prev = ((void *)0) [L6761-L6762] list->tail.next = ((void *)0) [L6765] struct aws_linked_list_node *curr = &list->head; [L6767] size_t i = 0; VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6767] COND FALSE !(i < length) [L6776] curr->next = &list->tail [L6777] list->tail.prev = curr [L7378] RET ensure_linked_list_is_allocated(&list, 20) [L7381] CALL, EXPR aws_linked_list_is_valid(&list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L7381] RET, EXPR aws_linked_list_is_valid(&list) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7381] CALL assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L7381] RET assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7386] CALL aws_linked_list_rend(&list) [L4824] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4824] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4824] CALL assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L4824] RET assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4825] const struct aws_linked_list_node *rval = &list->head; VAL [list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4826] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.5s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 775 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 753 mSDsluCounter, 3779 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 116 IncrementalHoareTripleChecker+Unchecked, 3102 mSDsCounter, 718 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4597 IncrementalHoareTripleChecker+Invalid, 5434 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 718 mSolverCounterUnsat, 677 mSDtfsCounter, 4597 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1189 GetRequests, 871 SyntacticMatches, 22 SemanticMatches, 296 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 32.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=15, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 117 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 18.5s InterpolantComputationTime, 1566 NumberOfCodeBlocks, 1526 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1600 ConstructedInterpolants, 41 QuantifiedInterpolants, 11188 SizeOfPredicates, 111 NumberOfNonLiveVariables, 4547 ConjunctsInSsa, 285 ConjunctsInUnsatCore, 31 InterpolantComputations, 13 PerfectInterpolantSequences, 705/922 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 15:22:52,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6509b5f3-70a6-4285-b16a-bf316aa86d0c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE