./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur --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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- 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-38b53e6 [2022-11-26 00:30:17,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:30:17,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:30:17,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:30:17,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:30:17,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:30:17,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:30:17,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:30:17,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:30:17,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:30:17,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:30:17,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:30:17,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:30:17,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:30:17,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:30:17,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:30:17,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:30:17,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:30:17,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:30:17,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:30:17,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:30:17,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:30:17,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:30:17,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:30:17,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:30:17,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:30:17,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:30:17,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:30:17,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:30:17,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:30:17,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:30:17,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:30:17,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:30:17,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:30:17,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:30:17,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:30:17,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:30:17,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:30:17,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:30:17,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:30:17,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:30:17,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:30:17,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:30:17,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:30:17,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:30:17,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:30:17,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:30:17,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:30:17,962 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:30:17,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:30:17,962 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:30:17,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:30:17,963 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:30:17,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:30:17,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:30:17,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:30:17,964 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:30:17,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:30:17,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:30:17,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:30:17,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:30:17,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:30:17,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:30:17,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:30:17,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:30:17,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:30:17,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:30:17,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:30:17,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:30:17,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:30:17,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:30:17,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:30:17,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:30:17,970 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:30:17,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:30:17,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:30:17,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:30:17,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:30:17,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:30:17,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:30:17,971 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_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-26 00:30:18,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:30:18,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:30:18,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:30:18,272 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:30:18,273 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:30:18,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-26 00:30:21,398 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:30:21,919 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:30:21,920 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-26 00:30:21,958 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/data/fca143cd3/a62395b2a7cf476ead38d94085d0e13f/FLAG59eb393b5 [2022-11-26 00:30:21,979 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/data/fca143cd3/a62395b2a7cf476ead38d94085d0e13f [2022-11-26 00:30:21,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:30:21,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:30:21,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:30:21,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:30:21,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:30:21,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:30:21" (1/1) ... [2022-11-26 00:30:21,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fa37b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:21, skipping insertion in model container [2022-11-26 00:30:21,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:30:21" (1/1) ... [2022-11-26 00:30:22,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:30:22,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:30:22,408 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_d47f2892-b1ba-434a-b807-cb81f8023c39/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-26 00:30:22,417 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_d47f2892-b1ba-434a-b807-cb81f8023c39/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-26 00:30:23,382 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:30:23,388 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,389 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,390 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,391 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,392 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,407 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,408 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,410 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,411 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,413 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,414 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,415 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,416 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:23,491 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:23,491 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:23,492 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:23,498 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:30:23,500 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:30:23,501 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:30:23,860 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:30:23,864 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:30:23,866 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:30:23,867 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:30:23,869 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:30:23,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:30:23,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:30:23,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:30:23,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:30:23,876 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:30:23,886 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:30:24,078 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:30:24,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:30:24,151 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:30:24,181 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_d47f2892-b1ba-434a-b807-cb81f8023c39/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-26 00:30:24,182 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_d47f2892-b1ba-434a-b807-cb81f8023c39/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-26 00:30:24,232 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:30:24,237 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,237 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,238 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,238 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,239 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,252 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,253 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,254 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,256 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,257 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,258 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,258 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,259 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:30:24,275 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:24,275 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:24,277 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:30:24,289 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:30:24,291 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:30:24,293 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:30:24,313 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:30:24,314 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:30:24,314 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:30:24,315 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:30:24,316 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:30:24,317 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:30:24,317 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:30:24,318 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:30:24,318 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:30:24,319 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:30:24,319 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:30:24,344 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:30:24,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:30:24,637 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:30:24,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24 WrapperNode [2022-11-26 00:30:24,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:30:24,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:30:24,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:30:24,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:30:24,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,743 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-26 00:30:24,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:30:24,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:30:24,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:30:24,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:30:24,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:30:24,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:30:24,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:30:24,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:30:24,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (1/1) ... [2022-11-26 00:30:24,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:30:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:24,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:30:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:30:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:30:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:30:24,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:30:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:30:24,876 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:30:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:30:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-26 00:30:24,877 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-26 00:30:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:30:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:30:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:30:24,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:30:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:30:24,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:30:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:30:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:30:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:30:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-26 00:30:24,881 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-26 00:30:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:30:25,189 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:30:25,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:30:25,540 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:30:25,739 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:30:25,740 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:30:25,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:30:25 BoogieIcfgContainer [2022-11-26 00:30:25,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:30:25,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:30:25,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:30:25,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:30:25,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:30:21" (1/3) ... [2022-11-26 00:30:25,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fff2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:30:25, skipping insertion in model container [2022-11-26 00:30:25,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:30:24" (2/3) ... [2022-11-26 00:30:25,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fff2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:30:25, skipping insertion in model container [2022-11-26 00:30:25,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:30:25" (3/3) ... [2022-11-26 00:30:25,761 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-26 00:30:25,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:30:25,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:30:25,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:30:25,865 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;@62585b23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:30:25,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:30:25,875 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) [2022-11-26 00:30:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:30:25,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:25,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:25,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-11-26 00:30:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171050654] [2022-11-26 00:30:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:25,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:30:26,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171050654] [2022-11-26 00:30:26,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171050654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735340893] [2022-11-26 00:30:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:26,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:26,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:26,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:26,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:30:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-26 00:30:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:30:27,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:30:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-26 00:30:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-26 00:30:29,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:29,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:29,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:29,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:29,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:30,007 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-26 00:30:30,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 8 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 132 treesize of output 78 [2022-11-26 00:30:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:30,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:30,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:30,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:30,036 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:30:30,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 31 [2022-11-26 00:30:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:30:30,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:30,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735340893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:30,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:30,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-26 00:30:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716467607] [2022-11-26 00:30:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:30,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:30:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:30:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:30:30,093 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 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:30:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:31,108 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2022-11-26 00:30:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:30:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-26 00:30:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:31,118 INFO L225 Difference]: With dead ends: 121 [2022-11-26 00:30:31,119 INFO L226 Difference]: Without dead ends: 79 [2022-11-26 00:30:31,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:30:31,125 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:31,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 238 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:30:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-26 00:30:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-26 00:30:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-26 00:30:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2022-11-26 00:30:31,209 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 37 [2022-11-26 00:30:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:31,210 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2022-11-26 00:30:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:30:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2022-11-26 00:30:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:30:31,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:31,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:31,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:30:31,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2022-11-26 00:30:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:31,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542240396] [2022-11-26 00:30:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:30:31,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542240396] [2022-11-26 00:30:31,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542240396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447552175] [2022-11-26 00:30:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:31,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:31,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:30:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-26 00:30:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:32,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:30:32,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:30:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 00:30:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:30:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 00:30:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 00:30:32,453 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 00:30:32,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-26 00:30:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-26 00:30:32,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2022-11-26 00:30:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-26 00:30:32,529 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 14 treesize of output 13 [2022-11-26 00:30:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:32,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-26 00:30:32,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:30:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:30:35,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:39,955 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse1 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse1) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-26 00:30:40,111 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16)) (.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse0 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse7 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-26 00:30:40,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-11-26 00:30:40,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 149 [2022-11-26 00:30:40,315 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 136 treesize of output 128 [2022-11-26 00:30:40,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2022-11-26 00:30:40,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-11-26 00:30:40,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 348 treesize of output 310 [2022-11-26 00:30:40,400 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 156 treesize of output 148 [2022-11-26 00:30:40,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-11-26 00:30:40,547 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 4 [2022-11-26 00:30:40,579 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 4 [2022-11-26 00:30:40,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 70 [2022-11-26 00:30:40,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 75 [2022-11-26 00:30:40,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-26 00:30:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:40,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-26 00:30:40,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-26 00:30:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:40,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-11-26 00:30:40,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,823 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 31 treesize of output 29 [2022-11-26 00:30:40,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,843 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:30:40,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2022-11-26 00:30:40,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:40,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 57 [2022-11-26 00:30:40,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,875 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 20 treesize of output 18 [2022-11-26 00:30:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,917 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:30:40,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 00:30:40,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,930 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:30:40,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 00:30:40,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,945 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:30:40,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 00:30:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:40,957 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:30:40,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 00:30:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-26 00:30:41,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447552175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:41,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192112323] [2022-11-26 00:30:41,099 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:30:41,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:41,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:41,110 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:41,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,213 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:30:41,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:30:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 00:30:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:30:41,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:30:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:30:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:30:41,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,822 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 00:30:41,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 00:30:41,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:41,889 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:30:41,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:30:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:30:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:30:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:41,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,053 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:30:42,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:30:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:42,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:30:42,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:30:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:30:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 00:30:42,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:30:42,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:30:42,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:30:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:30:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:30:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:30:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:42,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:30:43,048 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 00:30:43,279 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-26 00:30:43,332 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:30:43,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:46,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [192112323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:46,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:46,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-26 00:30:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332812039] [2022-11-26 00:30:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:30:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:30:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-26 00:30:46,562 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:30:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:48,777 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-11-26 00:30:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:30:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-26 00:30:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:48,781 INFO L225 Difference]: With dead ends: 138 [2022-11-26 00:30:48,781 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 00:30:48,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=120, Invalid=942, Unknown=2, NotChecked=126, Total=1190 [2022-11-26 00:30:48,786 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:48,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 205 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:30:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 00:30:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-26 00:30:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 66 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 00:30:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2022-11-26 00:30:48,840 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 38 [2022-11-26 00:30:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:48,841 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2022-11-26 00:30:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:30:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2022-11-26 00:30:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:30:48,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:48,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:48,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:30:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:49,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 537137871, now seen corresponding path program 1 times [2022-11-26 00:30:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189538335] [2022-11-26 00:30:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:30:49,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189538335] [2022-11-26 00:30:49,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189538335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673231415] [2022-11-26 00:30:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:49,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:49,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:30:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:49,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:30:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:30:49,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:49,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673231415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:49,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:49,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-26 00:30:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794330683] [2022-11-26 00:30:49,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:49,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:30:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:30:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:30:49,585 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:49,752 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-11-26 00:30:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:30:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2022-11-26 00:30:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:49,759 INFO L225 Difference]: With dead ends: 207 [2022-11-26 00:30:49,760 INFO L226 Difference]: Without dead ends: 111 [2022-11-26 00:30:49,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:30:49,766 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 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 [2022-11-26 00:30:49,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 144 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:30:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-26 00:30:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2022-11-26 00:30:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 66 states have internal predecessors, (83), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 00:30:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2022-11-26 00:30:49,813 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 40 [2022-11-26 00:30:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:49,813 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2022-11-26 00:30:49,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2022-11-26 00:30:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:30:49,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:49,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:49,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:50,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:50,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1649408245, now seen corresponding path program 1 times [2022-11-26 00:30:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117382853] [2022-11-26 00:30:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:30:50,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117382853] [2022-11-26 00:30:50,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117382853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840556170] [2022-11-26 00:30:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:50,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:50,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:50,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:30:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:30:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:30:50,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:50,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840556170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:50,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:50,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-26 00:30:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782942237] [2022-11-26 00:30:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:30:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:30:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:30:50,572 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:50,803 INFO L93 Difference]: Finished difference Result 249 states and 334 transitions. [2022-11-26 00:30:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:30:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-26 00:30:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:50,806 INFO L225 Difference]: With dead ends: 249 [2022-11-26 00:30:50,806 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:30:50,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:30:50,808 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 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 [2022-11-26 00:30:50,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:30:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:30:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2022-11-26 00:30:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 68 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 00:30:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2022-11-26 00:30:50,845 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 42 [2022-11-26 00:30:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:50,845 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2022-11-26 00:30:50,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2022-11-26 00:30:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:30:50,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:50,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:51,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1709149374, now seen corresponding path program 1 times [2022-11-26 00:30:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852167294] [2022-11-26 00:30:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:30:51,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852167294] [2022-11-26 00:30:51,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852167294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993771875] [2022-11-26 00:30:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:51,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:51,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:51,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:51,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:30:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:30:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:30:51,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:51,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993771875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:51,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:51,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-26 00:30:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576796929] [2022-11-26 00:30:51,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:51,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:30:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:30:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:30:51,617 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:51,702 INFO L93 Difference]: Finished difference Result 225 states and 309 transitions. [2022-11-26 00:30:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:30:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-11-26 00:30:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:51,705 INFO L225 Difference]: With dead ends: 225 [2022-11-26 00:30:51,705 INFO L226 Difference]: Without dead ends: 133 [2022-11-26 00:30:51,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:30:51,707 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:51,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:30:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-26 00:30:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2022-11-26 00:30:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 74 states have internal predecessors, (93), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 00:30:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-26 00:30:51,771 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 43 [2022-11-26 00:30:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:51,772 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-26 00:30:51,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:30:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-26 00:30:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:30:51,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:51,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:51,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:51,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:51,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2022-11-26 00:30:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:51,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327085077] [2022-11-26 00:30:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:51,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:30:52,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:52,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327085077] [2022-11-26 00:30:52,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327085077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:52,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781082358] [2022-11-26 00:30:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:52,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:52,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:30:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-26 00:30:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:52,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 00:30:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:30:52,734 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 00:30:52,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-26 00:30:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-26 00:30:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-26 00:30:52,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 00:30:52,853 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33| Int) (v_DerPreprocessor_10 (Array Int Int)) (v_DerPreprocessor_9 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33|))) (let ((.cse1 (select .cse0 24))) (and (= (select .cse0 0) .cse1) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33|) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_9) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33| v_DerPreprocessor_10) .cse1 v_DerPreprocessor_9) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33| v_DerPreprocessor_10) .cse1)) (= (select v_DerPreprocessor_10 24) .cse1) (not (= .cse1 0)) (<= (+ 2 .cse1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_33|))))) is different from true [2022-11-26 00:31:27,013 WARN L233 SmtUtils]: Spent 30.64s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 6 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:31:36,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:31:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781082358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871961001] [2022-11-26 00:31:41,684 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:31:41,685 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:41,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:41,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:41,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:41,766 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:31:41,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:31:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:41,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 00:31:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:31:42,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:31:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:31:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:31:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,281 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:31:42,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:31:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:31:42,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:31:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:31:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:31:42,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:31:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:42,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,044 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 00:31:43,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-26 00:31:43,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,400 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-26 00:31:43,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-11-26 00:31:43,599 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-26 00:31:43,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 643 treesize of output 654 [2022-11-26 00:31:43,859 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-26 00:31:43,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 646 treesize of output 664 [2022-11-26 00:31:43,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:43,948 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 00:31:43,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-11-26 00:31:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:43,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-26 00:31:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:31:57,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:31:57,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:31:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:31:57,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:31:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:31:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:31:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:31:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:31:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:31:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:31:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:58,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:31:58,605 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-26 00:31:59,045 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-26 00:31:59,106 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:31:59,126 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-26 00:31:59,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:32:06,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [871961001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:06,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:32:06,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-26 00:32:06,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395175882] [2022-11-26 00:32:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:06,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:32:06,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:32:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2221, Unknown=155, NotChecked=98, Total=2652 [2022-11-26 00:32:06,328 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:32:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:10,472 INFO L93 Difference]: Finished difference Result 227 states and 291 transitions. [2022-11-26 00:32:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:32:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-26 00:32:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:10,475 INFO L225 Difference]: With dead ends: 227 [2022-11-26 00:32:10,475 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:32:10,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=230, Invalid=2803, Unknown=163, NotChecked=110, Total=3306 [2022-11-26 00:32:10,477 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:10,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 204 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:32:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:32:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-26 00:32:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 82 states have internal predecessors, (102), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-26 00:32:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-11-26 00:32:10,517 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 46 [2022-11-26 00:32:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:10,518 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-11-26 00:32:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:32:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-11-26 00:32:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:32:10,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:10,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:10,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:32:10,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:10,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2022-11-26 00:32:10,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198189943] [2022-11-26 00:32:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:10,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:32:11,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198189943] [2022-11-26 00:32:11,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198189943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049940027] [2022-11-26 00:32:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:11,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:11,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:11,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:11,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:32:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:32:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:32:14,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:32:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049940027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112903209] [2022-11-26 00:32:14,614 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:32:14,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:32:14,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:32:14,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:32:14,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:32:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,683 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:32:14,683 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 [2022-11-26 00:32:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,751 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:32:14,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:32:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:14,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:32:14,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:32:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:32:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:32:15,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,151 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 00:32:15,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 00:32:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,241 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:32:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:32:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:32:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:32:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:15,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:32:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:15,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:15,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:15,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,074 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 00:32:16,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-26 00:32:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,418 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 00:32:16,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-11-26 00:32:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:32:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:16,522 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 00:32:16,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 686 treesize of output 639 [2022-11-26 00:32:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:16,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 660 treesize of output 639 [2022-11-26 00:32:16,783 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-26 00:32:16,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-11-26 00:32:16,905 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-26 00:32:16,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-26 00:32:17,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:32:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:17,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:32:18,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:32:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:32:18,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:32:18,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:32:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:32:18,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:32:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:18,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:18,891 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-26 00:32:19,710 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-26 00:32:19,755 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:32:19,773 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:32:19,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:32:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2112903209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:25,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:32:25,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-26 00:32:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032990834] [2022-11-26 00:32:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:32:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:32:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:32:25,551 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:32:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:30,253 INFO L93 Difference]: Finished difference Result 253 states and 321 transitions. [2022-11-26 00:32:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:32:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-26 00:32:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:30,255 INFO L225 Difference]: With dead ends: 253 [2022-11-26 00:32:30,255 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 00:32:30,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:32:30,257 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 182 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:32:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 00:32:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2022-11-26 00:32:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3) internal successors, (104), 84 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-26 00:32:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2022-11-26 00:32:30,320 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 48 [2022-11-26 00:32:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:30,321 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2022-11-26 00:32:30,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:32:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2022-11-26 00:32:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:32:30,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:30,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:30,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:30,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:30,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:30,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1197144193, now seen corresponding path program 1 times [2022-11-26 00:32:30,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:30,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43509222] [2022-11-26 00:32:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:32:30,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43509222] [2022-11-26 00:32:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43509222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119291024] [2022-11-26 00:32:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:30,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:30,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:30,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:32:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:32:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:31,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 00:32:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:31,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:32:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:31,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 00:32:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:31,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-26 00:32:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:32:31,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:31,663 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_939 (Array Int Int)) (v_ArrVal_938 (Array Int Int)) (v_ArrVal_941 Int)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_938) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_939) |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_941)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2022-11-26 00:32:31,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:32:31,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:32:31,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:32:31,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-26 00:32:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-11-26 00:32:31,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-11-26 00:32:31,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 00:32:31,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:32:31,810 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 20 treesize of output 24 [2022-11-26 00:32:31,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-26 00:32:31,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 00:32:31,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:32:31,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-11-26 00:32:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-26 00:32:32,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119291024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [806674658] [2022-11-26 00:32:32,076 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:32:32,077 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:32:32,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:32:32,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:32:32,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:32:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,142 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:32:32,142 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 [2022-11-26 00:32:32,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,204 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:32:32,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:32:32,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:32:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:32:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:32:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:32:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:32,604 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:32:32,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:32:32,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,693 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:32:32,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:32:32,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:32:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:32:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:32:32,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:32:32,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:32:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:32:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:32:32,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:32,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 00:32:32,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:32:32,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:32:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:33,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:32:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:33,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:33,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:32:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:33,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:32:35,833 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 00:32:35,859 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:32:36,671 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:32:36,673 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:32:36,692 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:32:36,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:32:43,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5024#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_63|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_63| 0))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:32:43,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:32:43,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:32:43,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2022-11-26 00:32:43,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563541070] [2022-11-26 00:32:43,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:32:43,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:32:43,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:43,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:32:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2253, Unknown=1, NotChecked=96, Total=2550 [2022-11-26 00:32:43,880 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-26 00:32:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:45,630 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-11-26 00:32:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:32:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2022-11-26 00:32:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:45,632 INFO L225 Difference]: With dead ends: 261 [2022-11-26 00:32:45,633 INFO L226 Difference]: Without dead ends: 199 [2022-11-26 00:32:45,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=304, Invalid=3359, Unknown=1, NotChecked=118, Total=3782 [2022-11-26 00:32:45,635 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 184 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:45,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 505 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 991 Invalid, 0 Unknown, 121 Unchecked, 1.1s Time] [2022-11-26 00:32:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-26 00:32:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 129. [2022-11-26 00:32:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.3012048192771084) internal successors, (108), 88 states have internal predecessors, (108), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 00:32:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2022-11-26 00:32:45,696 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 49 [2022-11-26 00:32:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:45,697 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2022-11-26 00:32:45,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-26 00:32:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2022-11-26 00:32:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:32:45,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:45,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:45,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:32:45,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:45,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash -150880783, now seen corresponding path program 1 times [2022-11-26 00:32:45,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:45,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667248454] [2022-11-26 00:32:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:32:46,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667248454] [2022-11-26 00:32:46,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667248454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337410223] [2022-11-26 00:32:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:46,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:46,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:46,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:32:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:46,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:32:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:32:46,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:32:46,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337410223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:46,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:32:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-11-26 00:32:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760861849] [2022-11-26 00:32:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:32:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:32:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:32:46,703 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:32:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:46,937 INFO L93 Difference]: Finished difference Result 247 states and 313 transitions. [2022-11-26 00:32:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:32:46,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-26 00:32:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:46,940 INFO L225 Difference]: With dead ends: 247 [2022-11-26 00:32:46,941 INFO L226 Difference]: Without dead ends: 131 [2022-11-26 00:32:46,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:32:46,944 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 166 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 [2022-11-26 00:32:46,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 166 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:32:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-26 00:32:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-26 00:32:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 88 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 00:32:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 163 transitions. [2022-11-26 00:32:47,000 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 163 transitions. Word has length 52 [2022-11-26 00:32:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:47,000 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 163 transitions. [2022-11-26 00:32:47,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:32:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 163 transitions. [2022-11-26 00:32:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:32:47,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:47,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:47,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:47,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:47,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2078798571, now seen corresponding path program 1 times [2022-11-26 00:32:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:47,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155736447] [2022-11-26 00:32:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:32:47,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155736447] [2022-11-26 00:32:47,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155736447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047097441] [2022-11-26 00:32:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:47,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:32:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:32:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:32:48,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:32:48,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047097441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:48,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:32:48,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-26 00:32:48,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474759052] [2022-11-26 00:32:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:48,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:32:48,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:32:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:32:48,113 INFO L87 Difference]: Start difference. First operand 129 states and 163 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:32:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:48,406 INFO L93 Difference]: Finished difference Result 273 states and 343 transitions. [2022-11-26 00:32:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:32:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-11-26 00:32:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:48,410 INFO L225 Difference]: With dead ends: 273 [2022-11-26 00:32:48,410 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 00:32:48,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:32:48,411 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:48,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 190 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:32:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 00:32:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2022-11-26 00:32:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 88 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 00:32:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 161 transitions. [2022-11-26 00:32:48,469 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 161 transitions. Word has length 56 [2022-11-26 00:32:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:48,469 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 161 transitions. [2022-11-26 00:32:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:32:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 161 transitions. [2022-11-26 00:32:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:32:48,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:48,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:48,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:32:48,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 48483986, now seen corresponding path program 1 times [2022-11-26 00:32:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:48,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244228008] [2022-11-26 00:32:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:32:48,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244228008] [2022-11-26 00:32:48,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244228008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972717359] [2022-11-26 00:32:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:48,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:48,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:32:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-26 00:32:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:49,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 00:32:49,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:49,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:32:49,427 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 00:32:49,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 104 [2022-11-26 00:32:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:49,433 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 100 treesize of output 82 [2022-11-26 00:32:49,440 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 14 treesize of output 13 [2022-11-26 00:32:49,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:32:49,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-26 00:32:49,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:32:58,070 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:33:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:33:05,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:33:09,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972717359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:09,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429445479] [2022-11-26 00:33:09,701 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:33:09,702 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:09,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:09,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:09,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:09,776 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:33:09,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:33:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:09,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 00:33:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:33:10,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:33:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:33:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,124 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 [2022-11-26 00:33:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:10,200 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:33:10,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:33:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:10,278 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:33:10,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:33:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:33:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,405 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:33:10,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:33:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:33:10,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:33:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:10,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:33:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:33:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:10,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:33:10,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:33:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:33:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:10,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:11,557 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-26 00:33:12,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-26 00:33:12,407 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:33:12,427 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:33:12,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:20,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1429445479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:20,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:33:20,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 18, 7] total 46 [2022-11-26 00:33:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908622073] [2022-11-26 00:33:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:33:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:33:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1896, Unknown=1, NotChecked=0, Total=2070 [2022-11-26 00:33:20,379 INFO L87 Difference]: Start difference. First operand 129 states and 161 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:33:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:26,900 INFO L93 Difference]: Finished difference Result 257 states and 317 transitions. [2022-11-26 00:33:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:33:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-11-26 00:33:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:26,904 INFO L225 Difference]: With dead ends: 257 [2022-11-26 00:33:26,905 INFO L226 Difference]: Without dead ends: 137 [2022-11-26 00:33:26,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=257, Invalid=2603, Unknown=2, NotChecked=0, Total=2862 [2022-11-26 00:33:26,907 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:26,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 149 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:33:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-26 00:33:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2022-11-26 00:33:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 88 states have internal predecessors, (102), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 00:33:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2022-11-26 00:33:26,960 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 60 [2022-11-26 00:33:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2022-11-26 00:33:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:33:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2022-11-26 00:33:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:33:26,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:26,962 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:26,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:27,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:27,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -894820411, now seen corresponding path program 1 times [2022-11-26 00:33:27,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055783169] [2022-11-26 00:33:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:27,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:33:27,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055783169] [2022-11-26 00:33:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055783169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:33:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903800803] [2022-11-26 00:33:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:27,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:27,443 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:27,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:33:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:33:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:33:27,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:33:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903800803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [609039687] [2022-11-26 00:33:28,079 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:33:28,079 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:28,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:28,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:28,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,139 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:33:28,140 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 [2022-11-26 00:33:28,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,197 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:33:28,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:33:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:33:28,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:33:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:33:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:33:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,563 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:33:28,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:33:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,619 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:33:28,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:33:28,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,731 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:33:28,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:33:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:33:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:33:28,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 00:33:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 00:33:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 00:33:28,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:33:28,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:33:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:29,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:29,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:33:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:29,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:29,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:31,579 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 00:33:31,603 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:33:32,437 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:33:32,439 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:33:32,458 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:33:32,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:40,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8514#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 0) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_99| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_99|))) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:40,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:40,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:33:40,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-26 00:33:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600555088] [2022-11-26 00:33:40,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:33:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:33:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:33:40,185 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 00:33:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:40,563 INFO L93 Difference]: Finished difference Result 257 states and 317 transitions. [2022-11-26 00:33:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:33:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-11-26 00:33:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:40,564 INFO L225 Difference]: With dead ends: 257 [2022-11-26 00:33:40,564 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 00:33:40,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:33:40,567 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:40,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 533 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:33:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 00:33:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2022-11-26 00:33:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 92 states have internal predecessors, (105), 28 states have call successors, (28), 14 states have call predecessors, (28), 18 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2022-11-26 00:33:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-11-26 00:33:40,612 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 63 [2022-11-26 00:33:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:40,613 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-11-26 00:33:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 00:33:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-11-26 00:33:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 00:33:40,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:40,614 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:40,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:40,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:40,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash 292884767, now seen corresponding path program 1 times [2022-11-26 00:33:40,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:40,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004318888] [2022-11-26 00:33:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:40,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 00:33:41,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004318888] [2022-11-26 00:33:41,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004318888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:33:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516193536] [2022-11-26 00:33:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:41,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:41,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:41,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:33:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-26 00:33:41,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:43,604 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_41| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_41| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_41|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_41|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_41| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_41| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_41|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_41|) 0)))) is different from true [2022-11-26 00:33:44,481 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:33:44,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-26 00:33:44,488 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-26 00:33:44,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-26 00:33:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-26 00:33:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:45,125 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-26 00:33:45,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-26 00:33:45,136 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-26 00:33:45,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-26 00:33:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:33:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516193536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128236383] [2022-11-26 00:33:45,166 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:33:45,167 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:45,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:45,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:45,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,228 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:33:45,228 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 [2022-11-26 00:33:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,291 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:33:45,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:33:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:33:45,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:33:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:33:45,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:33:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:45,671 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:33:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:33:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,749 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 00:33:45,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 00:33:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:33:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,901 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:33:45,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:33:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:33:46,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:33:46,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:33:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:46,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:33:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:33:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:33:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:33:46,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:46,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:33:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:46,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:33:48,687 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 00:33:48,710 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:33:49,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:33:49,567 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:33:49,584 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:33:49,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:58,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9529#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| Int)) (and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 16)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_121|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_121|))) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:58,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:58,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:33:58,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-11-26 00:33:58,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403811203] [2022-11-26 00:33:58,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:58,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:33:58,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:33:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-11-26 00:33:58,616 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-26 00:34:00,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:02,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:04,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:08,439 INFO L93 Difference]: Finished difference Result 392 states and 482 transitions. [2022-11-26 00:34:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:34:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-11-26 00:34:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:08,442 INFO L225 Difference]: With dead ends: 392 [2022-11-26 00:34:08,442 INFO L226 Difference]: Without dead ends: 253 [2022-11-26 00:34:08,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=892, Invalid=7853, Unknown=1, NotChecked=184, Total=8930 [2022-11-26 00:34:08,446 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 223 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 110 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:08,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 425 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1152 Invalid, 3 Unknown, 118 Unchecked, 7.4s Time] [2022-11-26 00:34:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-26 00:34:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 170. [2022-11-26 00:34:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 115 states have (on average 1.208695652173913) internal successors, (139), 119 states have internal predecessors, (139), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 00:34:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 205 transitions. [2022-11-26 00:34:08,525 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 205 transitions. Word has length 65 [2022-11-26 00:34:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:08,525 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 205 transitions. [2022-11-26 00:34:08,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-26 00:34:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 205 transitions. [2022-11-26 00:34:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:34:08,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:08,532 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:08,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:08,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:34:08,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash 242292360, now seen corresponding path program 2 times [2022-11-26 00:34:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055142456] [2022-11-26 00:34:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:34:10,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055142456] [2022-11-26 00:34:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055142456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371682594] [2022-11-26 00:34:10,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:10,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:10,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:34:10,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:34:10,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:10,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-26 00:34:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:34:15,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:34:19,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371682594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764677832] [2022-11-26 00:34:19,793 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:34:19,793 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:19,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:19,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:19,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:19,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:19,866 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:34:19,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:34:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:19,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 00:34:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:34:20,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:34:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:34:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:34:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:20,279 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:34:20,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:34:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,369 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:34:20,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:34:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:34:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:34:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:34:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:34:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:34:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:34:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:34:20,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:20,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:34:20,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:34:20,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:34:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:34:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:34:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:34:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:34:23,292 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 00:34:23,315 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:34:24,105 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:34:24,107 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:34:24,123 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:34:24,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:34,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10865#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24)) 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_143|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_143| 16)))) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:34,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:34,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:34,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-26 00:34:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924896446] [2022-11-26 00:34:34,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:34:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:34:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:34:34,426 INFO L87 Difference]: Start difference. First operand 170 states and 205 transitions. Second operand has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-26 00:34:36,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:38,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:40,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:42,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:44,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:50,205 INFO L93 Difference]: Finished difference Result 296 states and 363 transitions. [2022-11-26 00:34:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:34:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2022-11-26 00:34:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:50,208 INFO L225 Difference]: With dead ends: 296 [2022-11-26 00:34:50,208 INFO L226 Difference]: Without dead ends: 231 [2022-11-26 00:34:50,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=429, Invalid=5121, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:34:50,211 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 159 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 207 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:50,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 471 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1558 Invalid, 4 Unknown, 0 Unchecked, 12.1s Time] [2022-11-26 00:34:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-26 00:34:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2022-11-26 00:34:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 120 states have internal predecessors, (139), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 00:34:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2022-11-26 00:34:50,320 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 66 [2022-11-26 00:34:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:50,320 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2022-11-26 00:34:50,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-26 00:34:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2022-11-26 00:34:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:34:50,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:50,322 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:50,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:34:50,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 1 times [2022-11-26 00:34:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967566218] [2022-11-26 00:34:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:34:53,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967566218] [2022-11-26 00:34:53,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967566218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161047869] [2022-11-26 00:34:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:53,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:53,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:53,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:34:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-26 00:34:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:57,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:03,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161047869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414845973] [2022-11-26 00:35:03,745 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:35:03,745 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:03,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:03,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:03,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:03,816 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:35:03,817 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 [2022-11-26 00:35:03,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:03,881 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:35:03,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:35:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:35:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:35:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:35:04,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:35:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 00:35:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:35:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:35:04,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:04,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:35:14,973 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-26 00:35:15,263 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:35:16,028 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-26 00:35:16,069 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:35:16,086 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:35:16,150 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:39,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11931#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) 3)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) 4)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) (- 8))) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| 16) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) 2)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) (- 8))) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) 0) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:39,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:39,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:39,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 42 [2022-11-26 00:35:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634494635] [2022-11-26 00:35:39,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:35:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:35:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=5566, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:35:39,658 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-26 00:35:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:45,930 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2022-11-26 00:35:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:35:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-26 00:35:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:45,933 INFO L225 Difference]: With dead ends: 265 [2022-11-26 00:35:45,933 INFO L226 Difference]: Without dead ends: 226 [2022-11-26 00:35:45,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=846, Invalid=9254, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 00:35:45,937 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 220 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:45,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 741 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:35:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-26 00:35:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 171. [2022-11-26 00:35:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 120 states have internal predecessors, (137), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 00:35:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2022-11-26 00:35:46,025 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 67 [2022-11-26 00:35:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:46,025 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2022-11-26 00:35:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-26 00:35:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2022-11-26 00:35:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:35:46,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:46,027 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:46,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 00:35:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:46,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-11-26 00:35:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859068816] [2022-11-26 00:35:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 00:35:46,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859068816] [2022-11-26 00:35:46,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859068816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:46,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:46,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:35:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307026386] [2022-11-26 00:35:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:35:46,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:35:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:35:46,467 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 00:35:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:46,753 INFO L93 Difference]: Finished difference Result 193 states and 226 transitions. [2022-11-26 00:35:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-26 00:35:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:46,755 INFO L225 Difference]: With dead ends: 193 [2022-11-26 00:35:46,755 INFO L226 Difference]: Without dead ends: 191 [2022-11-26 00:35:46,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:46,756 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 10 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:46,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 306 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-26 00:35:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2022-11-26 00:35:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 122 states have (on average 1.1721311475409837) internal successors, (143), 126 states have internal predecessors, (143), 35 states have call successors, (35), 21 states have call predecessors, (35), 23 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-11-26 00:35:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 213 transitions. [2022-11-26 00:35:46,906 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 213 transitions. Word has length 70 [2022-11-26 00:35:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:46,906 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 213 transitions. [2022-11-26 00:35:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 00:35:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 213 transitions. [2022-11-26 00:35:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:35:46,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:46,909 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:46,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:35:46,909 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash -358000847, now seen corresponding path program 2 times [2022-11-26 00:35:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573509743] [2022-11-26 00:35:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:46,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:35:48,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573509743] [2022-11-26 00:35:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573509743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077202157] [2022-11-26 00:35:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:35:48,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:48,647 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:35:49,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:35:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:49,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-26 00:35:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:14,029 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:36:14,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:15,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:36:15,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-26 00:36:15,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:36:15,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-26 00:36:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 00:36:15,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077202157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381591063] [2022-11-26 00:36:15,134 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:36:15,134 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:15,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:15,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:15,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:15,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,204 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:36:15,204 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 [2022-11-26 00:36:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,266 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:36:15,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:36:15,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:36:15,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:36:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:36:15,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:36:15,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:36:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 00:36:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 00:36:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:15,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:36:25,585 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-26 00:36:25,816 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:36:26,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-26 00:36:26,533 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:36:26,548 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:36:26,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:46,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13675#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 4)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 2)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 16) 0) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 3)))))' at error location [2022-11-26 00:36:46,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:46,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:46,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-11-26 00:36:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933717465] [2022-11-26 00:36:46,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:36:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:36:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=3509, Unknown=7, NotChecked=0, Total=3906 [2022-11-26 00:36:46,541 INFO L87 Difference]: Start difference. First operand 181 states and 213 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-26 00:37:06,893 WARN L233 SmtUtils]: Spent 20.08s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:16,990 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:27,091 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:37,190 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:57,362 WARN L233 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:07,611 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:28,236 WARN L233 SmtUtils]: Spent 20.11s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:29,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:29,081 INFO L93 Difference]: Finished difference Result 274 states and 320 transitions. [2022-11-26 00:38:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:38:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-26 00:38:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:29,083 INFO L225 Difference]: With dead ends: 274 [2022-11-26 00:38:29,083 INFO L226 Difference]: Without dead ends: 198 [2022-11-26 00:38:29,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 146.3s TimeCoverageRelationStatistics Valid=599, Invalid=5246, Unknown=7, NotChecked=0, Total=5852 [2022-11-26 00:38:29,085 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 213 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:29,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 703 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:38:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-26 00:38:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2022-11-26 00:38:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 118 states have internal predecessors, (129), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-26 00:38:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-11-26 00:38:29,222 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 73 [2022-11-26 00:38:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:29,223 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-11-26 00:38:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-26 00:38:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-11-26 00:38:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 00:38:29,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:29,224 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:29,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:29,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:38:29,440 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1472651218, now seen corresponding path program 1 times [2022-11-26 00:38:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:29,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558142245] [2022-11-26 00:38:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 00:38:29,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558142245] [2022-11-26 00:38:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558142245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:38:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61185954] [2022-11-26 00:38:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:29,750 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:38:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:29,973 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2022-11-26 00:38:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-26 00:38:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:29,975 INFO L225 Difference]: With dead ends: 180 [2022-11-26 00:38:29,975 INFO L226 Difference]: Without dead ends: 178 [2022-11-26 00:38:29,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:38:29,976 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:38:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-26 00:38:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-11-26 00:38:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 121 states have (on average 1.115702479338843) internal successors, (135), 124 states have internal predecessors, (135), 32 states have call successors, (32), 23 states have call predecessors, (32), 24 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-26 00:38:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2022-11-26 00:38:30,076 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 76 [2022-11-26 00:38:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:30,076 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2022-11-26 00:38:30,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:38:30,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2022-11-26 00:38:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:38:30,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:30,078 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:38:30,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1828961022, now seen corresponding path program 1 times [2022-11-26 00:38:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317802463] [2022-11-26 00:38:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-26 00:38:34,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:34,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317802463] [2022-11-26 00:38:34,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317802463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:34,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557164791] [2022-11-26 00:38:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:34,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:34,591 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:34,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47f2892-b1ba-434a-b807-cb81f8023c39/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:38:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-26 00:38:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:35,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 00:38:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:35,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:38:35,307 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-26 00:38:35,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 100 [2022-11-26 00:38:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:35,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 72 [2022-11-26 00:38:35,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 00:38:35,470 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select .cse1 24) (select v_DerPreprocessor_90 24)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_90) .cse0 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_90) .cse0)))))) is different from true [2022-11-26 00:38:36,656 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse2 0)) (= (select v_DerPreprocessor_90 24) (select .cse3 24)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2))))))) is different from true [2022-11-26 00:38:36,698 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse2 0)) (= (select v_DerPreprocessor_90 24) (select .cse3 24)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2)))))) (not (= (mod |c_assume_abort_if_not_#in~cond| 256) 0))) is different from true [2022-11-26 00:38:37,251 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse2 (select .cse3 0))) (and (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select .cse3 24) (select v_DerPreprocessor_93 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse2 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (not (= .cse2 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse4 0)) (= (select v_DerPreprocessor_90 24) (select .cse5 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse4 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse4))))))) is different from true [2022-11-26 00:38:39,855 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse3 (+ .cse4 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse2) .cse3) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse4 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse6 (+ .cse7 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse7 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse9 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse8 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse11 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse10 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)))) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| 0))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse13 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse12 (select .cse13 0))) (and (<= (+ .cse12 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select .cse13 24) (select v_DerPreprocessor_93 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse12 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse12 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse12) (select |c_#memory_$Pointer$.base| .cse12)) (not (= .cse12 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse15 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse14 (select .cse15 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse14 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse14 0)) (= (select v_DerPreprocessor_90 24) (select .cse15 24)) (= (select |c_#memory_$Pointer$.base| .cse14) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse14 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse14 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse14))))))) is different from true [2022-11-26 00:39:37,232 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|))) (let ((.cse3 (select .cse5 0))) (let ((.cse2 (select |c_#memory_$Pointer$.base| .cse3)) (.cse4 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) 0)))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= .cse2 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3)) (<= (+ 2 .cse3) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) 0) (= (select .cse2 .cse4) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select .cse5 24) (select v_DerPreprocessor_93 24)) (not (= .cse3 0))))))) (exists ((v_DerPreprocessor_95 (Array Int Int)) (v_DerPreprocessor_96 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse6 (select .cse7 0))) (and (<= (+ .cse6 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse6 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse6)) (not (= .cse6 0)) (= (select .cse7 24) (select v_DerPreprocessor_95 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse9 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse8 (select .cse9 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse8 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse8 0)) (= (select v_DerPreprocessor_90 24) (select .cse9 24)) (= (select |c_#memory_$Pointer$.base| .cse8) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse8 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse8))))))) is different from true [2022-11-26 00:39:40,377 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|))) (let ((.cse3 (select .cse5 0))) (let ((.cse2 (select |c_#memory_$Pointer$.base| .cse3)) (.cse4 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) 0)))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= .cse2 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3)) (<= (+ 2 .cse3) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) 0) (= (select .cse2 .cse4) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select .cse5 24) (select v_DerPreprocessor_93 24)) (not (= .cse3 0))))))) (exists ((v_DerPreprocessor_97 (Array Int Int)) (v_DerPreprocessor_98 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103| Int)) (let ((.cse9 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103|))) (let ((.cse8 (select .cse9 0))) (let ((.cse6 (select |c_#memory_$Pointer$.base| .cse8)) (.cse7 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103|) 0)))) (and (= (select .cse6 .cse7) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103|) (not (= .cse8 0)) (= (select v_DerPreprocessor_97 24) (select .cse9 24)) (= .cse6 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_98) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103| v_DerPreprocessor_97) .cse8 v_DerPreprocessor_98) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103| v_DerPreprocessor_97) .cse8)) (<= (+ 2 .cse8) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103|) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_103|) (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse7) 0)))))) (exists ((v_DerPreprocessor_95 (Array Int Int)) (v_DerPreprocessor_96 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse11 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse10 (select .cse11 0))) (and (<= (+ .cse10 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select |c_#memory_$Pointer$.base| .cse10) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse10 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse10 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse10)) (not (= .cse10 0)) (= (select .cse11 24) (select v_DerPreprocessor_95 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse13 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse12 (select .cse13 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse12 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse12 0)) (= (select v_DerPreprocessor_90 24) (select .cse13 24)) (= (select |c_#memory_$Pointer$.base| .cse12) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse12 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse12 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse12))))))) is different from true [2022-11-26 00:39:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 31 refuted. 17 times theorem prover too weak. 6 trivial. 54 not checked. [2022-11-26 00:39:57,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:56,098 INFO L321 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2022-11-26 00:40:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 140 [2022-11-26 00:41:12,135 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:12,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557164791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017304762] [2022-11-26 00:41:12,139 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:41:12,139 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:12,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:12,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:12,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:12,626 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 00:41:12,626 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 [2022-11-26 00:41:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,146 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:41:13,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:41:13,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 00:41:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 00:41:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:41:13,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 00:41:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:13,941 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:41:13,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:41:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:14,241 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:41:14,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 00:41:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:41:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 00:41:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,127 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:41:15,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 00:41:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 00:41:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:41:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:41:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 00:41:15,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 00:41:15,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:41:15,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:41:15,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 00:41:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:41:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:41:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 00:41:17,281 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-26 00:41:17,312 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-11-26 00:41:18,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-26 00:41:18,608 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 00:41:18,631 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:41:18,703 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:42:25,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15319#(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 [2022-11-26 00:42:25,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:42:25,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:42:25,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36] total 54 [2022-11-26 00:42:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459043371] [2022-11-26 00:42:25,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:42:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-26 00:42:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-26 00:42:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=6622, Unknown=52, NotChecked=1190, Total=8190 [2022-11-26 00:42:25,786 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand has 54 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 20 states have call successors, (23), 9 states have call predecessors, (23), 16 states have return successors, (23), 18 states have call predecessors, (23), 19 states have call successors, (23) [2022-11-26 00:42:40,520 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select .cse1 24) (select v_DerPreprocessor_90 24)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_90) .cse0 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_90) .cse0))))))) is different from true [2022-11-26 00:42:55,614 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse2 0)) (= (select v_DerPreprocessor_90 24) (select .cse3 24)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse2))))))) is different from true [2022-11-26 00:43:05,937 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse2 (select .cse3 0))) (and (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select .cse3 24) (select v_DerPreprocessor_93 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse2 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (not (= .cse2 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse4 0)) (= (select v_DerPreprocessor_90 24) (select .cse5 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse4 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse4))))))) is different from true [2022-11-26 00:43:14,384 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse3 (+ .cse4 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse2) .cse3) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse4 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse6 (+ .cse7 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse7 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse9 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse8 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)) (.cse11 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_88|) (not (= .cse10 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88|)))) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_88| 0))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse13 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse12 (select .cse13 0))) (and (<= (+ .cse12 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select .cse13 24) (select v_DerPreprocessor_93 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse12 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse12 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_93) .cse12) (select |c_#memory_$Pointer$.base| .cse12)) (not (= .cse12 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse15 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse14 (select .cse15 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse14 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse14 0)) (= (select v_DerPreprocessor_90 24) (select .cse15 24)) (= (select |c_#memory_$Pointer$.base| .cse14) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse14 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse14 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse14))))))) is different from true [2022-11-26 00:43:43,502 WARN L233 SmtUtils]: Spent 21.74s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:47,399 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((v_DerPreprocessor_91 (Array Int Int)) (v_DerPreprocessor_92 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|))) (let ((.cse0 (select .cse1 0))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (= (select .cse1 24) (select v_DerPreprocessor_91 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0 v_DerPreprocessor_92) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_241| v_DerPreprocessor_91) .cse0)))))) (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|))) (let ((.cse3 (select .cse5 0))) (let ((.cse2 (select |c_#memory_$Pointer$.base| .cse3)) (.cse4 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) 0)))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= .cse2 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3 v_DerPreprocessor_94) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102| v_DerPreprocessor_93) .cse3)) (<= (+ 2 .cse3) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) 0) (= (select .cse2 .cse4) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_102|) (= (select .cse5 24) (select v_DerPreprocessor_93 24)) (not (= .cse3 0))))))) (exists ((v_DerPreprocessor_95 (Array Int Int)) (v_DerPreprocessor_96 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))) (let ((.cse6 (select .cse7 0))) (and (<= (+ .cse6 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|) (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse6 v_DerPreprocessor_96) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101| v_DerPreprocessor_95) .cse6)) (not (= .cse6 0)) (= (select .cse7 24) (select v_DerPreprocessor_95 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_101|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| Int) (v_DerPreprocessor_90 (Array Int Int)) (v_DerPreprocessor_89 (Array Int Int))) (let ((.cse9 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|))) (let ((.cse8 (select .cse9 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (<= (+ .cse8 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242|) (not (= .cse8 0)) (= (select v_DerPreprocessor_90 24) (select .cse9 24)) (= (select |c_#memory_$Pointer$.base| .cse8) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse8 v_DerPreprocessor_89) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_242| v_DerPreprocessor_90) .cse8))))))) is different from true [2022-11-26 00:44:06,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:08,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:10,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:12,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:14,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:16,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:18,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:20,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:22,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:44:24,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]