./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 04:40:40,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:40:40,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:40:40,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:40:40,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:40:40,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:40:40,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:40:40,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:40:40,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:40:40,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:40:40,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:40:40,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:40:40,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:40:40,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:40:40,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:40:40,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:40:40,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:40:40,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:40:40,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:40:40,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:40:40,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:40:40,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:40:40,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:40:40,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:40:40,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:40:40,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:40:40,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:40:40,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:40:40,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:40:40,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:40:40,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:40:40,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:40:40,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:40:40,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:40:40,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:40:40,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:40:40,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:40:40,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:40:40,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:40:40,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:40:40,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:40:40,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 04:40:40,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:40:40,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:40:40,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:40:40,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:40:40,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:40:40,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:40:40,363 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:40:40,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:40:40,364 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:40:40,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:40:40,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:40:40,365 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:40:40,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:40:40,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:40:40,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:40:40,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:40:40,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:40:40,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:40:40,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:40:40,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:40:40,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:40:40,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:40:40,369 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-12-14 04:40:40,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:40:40,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:40:40,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:40:40,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:40:40,553 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:40:40,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-12-14 04:40:43,168 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:40:43,443 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:40:43,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-12-14 04:40:43,478 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/data/9b3541439/c4f436be825d497099a5a858f127e4e2/FLAGf8c48163b [2022-12-14 04:40:43,488 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/data/9b3541439/c4f436be825d497099a5a858f127e4e2 [2022-12-14 04:40:43,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:40:43,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:40:43,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:40:43,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:40:43,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:40:43,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:40:43" (1/1) ... [2022-12-14 04:40:43,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761e6dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:43, skipping insertion in model container [2022-12-14 04:40:43,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:40:43" (1/1) ... [2022-12-14 04:40:43,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:40:43,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:40:43,806 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-12-14 04:40:43,814 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-12-14 04:40:44,465 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 04:40:44,471 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,472 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,472 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,473 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,474 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,488 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,488 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,490 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,491 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,493 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,494 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,494 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,495 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,548 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:44,548 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:44,549 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:44,553 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 04:40:44,555 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 04:40:44,556 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 04:40:44,765 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 04:40:44,767 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 04:40:44,768 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 04:40:44,769 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 04:40:44,770 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 04:40:44,771 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 04:40:44,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 04:40:44,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 04:40:44,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 04:40:44,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 04:40:44,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 04:40:44,886 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 04:40:44,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:40:44,925 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:40:44,936 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-12-14 04:40:44,937 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_9ea8c444-d067-4617-8b42-1bf1423c19ab/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-12-14 04:40:44,978 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 04:40:44,982 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,982 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,983 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,983 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,984 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,992 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,993 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,994 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,995 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,996 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,997 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,997 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:44,998 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 04:40:45,006 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:45,007 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:45,007 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 04:40:45,012 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 04:40:45,013 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 04:40:45,014 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 04:40:45,038 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 04:40:45,038 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 04:40:45,039 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 04:40:45,039 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 04:40:45,040 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 04:40:45,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 04:40:45,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 04:40:45,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 04:40:45,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 04:40:45,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 04:40:45,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 04:40:45,064 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 04:40:45,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:40:45,253 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:40:45,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45 WrapperNode [2022-12-14 04:40:45,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:40:45,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:40:45,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:40:45,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:40:45,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,330 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-12-14 04:40:45,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:40:45,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:40:45,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:40:45,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:40:45,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:40:45,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:40:45,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:40:45,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:40:45,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (1/1) ... [2022-12-14 04:40:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:40:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:40:45,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:40:45,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:40:45,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 04:40:45,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 04:40:45,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 04:40:45,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 04:40:45,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:40:45,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:40:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 04:40:45,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 04:40:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 04:40:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 04:40:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 04:40:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 04:40:45,427 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 04:40:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:40:45,602 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:40:45,604 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:40:45,783 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:40:45,845 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:40:45,846 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 04:40:45,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:40:45 BoogieIcfgContainer [2022-12-14 04:40:45,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:40:45,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:40:45,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:40:45,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:40:45,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:40:43" (1/3) ... [2022-12-14 04:40:45,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce417ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:40:45, skipping insertion in model container [2022-12-14 04:40:45,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:40:45" (2/3) ... [2022-12-14 04:40:45,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce417ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:40:45, skipping insertion in model container [2022-12-14 04:40:45,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:40:45" (3/3) ... [2022-12-14 04:40:45,854 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-12-14 04:40:45,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:40:45,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:40:45,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:40:45,918 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;@33be036e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:40:45,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:40:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 04:40:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 04:40:45,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:40:45,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:40:45,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:40:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:40:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-12-14 04:40:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:40:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450860768] [2022-12-14 04:40:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:40:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:40:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:40:46,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:40:46,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450860768] [2022-12-14 04:40:46,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450860768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:40:46,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877564112] [2022-12-14 04:40:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:40:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:40:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:40:46,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:40:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:40:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 04:40:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:40:46,748 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 [2022-12-14 04:40:46,760 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 [2022-12-14 04:40:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,828 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 [2022-12-14 04:40:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:46,844 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 [2022-12-14 04:40:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:40:47,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:40:47,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877564112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:40:47,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:40:47,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-12-14 04:40:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397475222] [2022-12-14 04:40:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:40:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:40:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:40:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:40:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:40:47,959 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 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:40:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:40:48,558 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2022-12-14 04:40:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:40:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-12-14 04:40:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:40:48,566 INFO L225 Difference]: With dead ends: 121 [2022-12-14 04:40:48,566 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 04:40:48,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:40:48,570 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:40:48,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 211 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 04:40:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 04:40:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-12-14 04:40:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-12-14 04:40:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2022-12-14 04:40:48,622 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 37 [2022-12-14 04:40:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:40:48,622 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2022-12-14 04:40:48,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:40:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2022-12-14 04:40:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 04:40:48,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:40:48,626 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] [2022-12-14 04:40:48,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:40:48,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 04:40:48,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:40:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:40:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2022-12-14 04:40:48,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:40:48,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996815821] [2022-12-14 04:40:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:40:48,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:40:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:40:49,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:40:49,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996815821] [2022-12-14 04:40:49,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996815821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:40:49,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561376667] [2022-12-14 04:40:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:40:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:40:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:40:49,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:40:49,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:40:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 04:40:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:40:49,278 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 [2022-12-14 04:40:49,292 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 [2022-12-14 04:40:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,343 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 [2022-12-14 04:40:49,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,349 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 [2022-12-14 04:40:49,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,373 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 [2022-12-14 04:40:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,379 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 [2022-12-14 04:40:49,468 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 04:40:49,469 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 [2022-12-14 04:40:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,479 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 [2022-12-14 04:40:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 04:40:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:49,497 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 [2022-12-14 04:40:49,509 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 [2022-12-14 04:40:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:40:50,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:40:52,720 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= 0 (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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_rend_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-12-14 04:40:52,813 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse7 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |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_rend_harness_~#list~0#1.base|) .cse2) 0)))))) is different from false [2022-12-14 04:40:52,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:40:52,868 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 04:40:52,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:40:52,877 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 193 treesize of output 167 [2022-12-14 04:40:52,885 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 [2022-12-14 04:40:52,893 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 73 treesize of output 69 [2022-12-14 04:40:52,940 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 7 treesize of output 3 [2022-12-14 04:40:52,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:40:52,959 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 76 treesize of output 80 [2022-12-14 04:40:53,026 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 04:40:53,027 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 [2022-12-14 04:40:53,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:40:53,043 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 [2022-12-14 04:40:53,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,052 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 42 treesize of output 34 [2022-12-14 04:40:53,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:40:53,063 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 [2022-12-14 04:40:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,069 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 86 treesize of output 68 [2022-12-14 04:40:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,081 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 04:40:53,081 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 61 treesize of output 44 [2022-12-14 04:40:53,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,087 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 20 treesize of output 18 [2022-12-14 04:40:53,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:40:53,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,114 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 04:40:53,114 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 [2022-12-14 04:40:53,119 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:40:53,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,128 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 04:40:53,129 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 [2022-12-14 04:40:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-12-14 04:40:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561376667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:40:53,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719237781] [2022-12-14 04:40:53,213 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 04:40:53,213 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:40:53,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:40:53,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:40:53,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:40:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,303 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:40:53,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:40:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,371 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:40:53,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:40:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,585 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 [2022-12-14 04:40:53,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:40:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:40:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:40:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,750 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 04:40:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 04:40:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,774 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 [2022-12-14 04:40:53,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:53,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:40:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,828 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 [2022-12-14 04:40:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,855 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 [2022-12-14 04:40:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:53,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:40:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,367 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 04:40:54,368 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 [2022-12-14 04:40:54,727 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 04:40:54,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 680 [2022-12-14 04:40:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:40:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:55,009 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 04:40:55,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 678 treesize of output 687 [2022-12-14 04:40:55,097 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 04:40:55,097 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 [2022-12-14 04:40:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:40:55,143 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 04:40:55,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-12-14 04:40:55,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 04:41:01,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:41:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:41:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 04:41:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 04:41:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:41:01,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:41:01,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:41:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:41:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 04:41:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:41:01,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:01,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:41:01,982 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-12-14 04:41:02,128 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-12-14 04:41:02,164 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:41:02,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:41:04,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [719237781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:04,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:41:04,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-12-14 04:41:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9079035] [2022-12-14 04:41:04,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:04,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 04:41:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 04:41:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=668, Unknown=4, NotChecked=106, Total=870 [2022-12-14 04:41:04,392 INFO L87 Difference]: Start difference. First operand 79 states and 106 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) [2022-12-14 04:41:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:41:05,712 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2022-12-14 04:41:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 04:41:05,713 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 [2022-12-14 04:41:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:41:05,713 INFO L225 Difference]: With dead ends: 142 [2022-12-14 04:41:05,713 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 04:41:05,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=113, Invalid=821, Unknown=4, NotChecked=118, Total=1056 [2022-12-14 04:41:05,715 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:41:05,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 195 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 04:41:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 04:41:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-12-14 04:41:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 66 states have internal predecessors, (86), 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) [2022-12-14 04:41:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2022-12-14 04:41:05,737 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 38 [2022-12-14 04:41:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:41:05,737 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2022-12-14 04:41:05,737 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) [2022-12-14 04:41:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2022-12-14 04:41:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 04:41:05,738 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:41:05,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:41:05,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:41:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 04:41:05,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:41:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:41:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2022-12-14 04:41:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:41:05,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398733075] [2022-12-14 04:41:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:41:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:41:06,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:41:06,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398733075] [2022-12-14 04:41:06,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398733075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:41:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704410110] [2022-12-14 04:41:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:06,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:41:06,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:41:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:41:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 04:41:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:41:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:41:06,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:41:06,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704410110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:06,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:41:06,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 04:41:06,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034252800] [2022-12-14 04:41:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:41:06,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:06,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:41:06,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:41:06,222 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:41:06,349 INFO L93 Difference]: Finished difference Result 209 states and 279 transitions. [2022-12-14 04:41:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:41:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-12-14 04:41:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:41:06,351 INFO L225 Difference]: With dead ends: 209 [2022-12-14 04:41:06,351 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 04:41:06,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:41:06,353 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:41:06,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 144 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:41:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 04:41:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-12-14 04:41:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 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) [2022-12-14 04:41:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2022-12-14 04:41:06,386 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 39 [2022-12-14 04:41:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:41:06,386 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2022-12-14 04:41:06,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2022-12-14 04:41:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:41:06,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:41:06,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:41:06,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 04:41:06,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:06,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:41:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:41:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2022-12-14 04:41:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:41:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300889850] [2022-12-14 04:41:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:41:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:41:06,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:41:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300889850] [2022-12-14 04:41:06,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300889850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:41:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750681794] [2022-12-14 04:41:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:06,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:41:06,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:41:06,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:41:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 04:41:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:41:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:41:06,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:41:06,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750681794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:06,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:41:06,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 04:41:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102210521] [2022-12-14 04:41:06,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:41:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:41:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:41:06,980 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:41:07,147 INFO L93 Difference]: Finished difference Result 251 states and 339 transitions. [2022-12-14 04:41:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:41:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-12-14 04:41:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:41:07,149 INFO L225 Difference]: With dead ends: 251 [2022-12-14 04:41:07,149 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 04:41:07,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 04:41:07,150 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 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 [2022-12-14 04:41:07,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:41:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 04:41:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2022-12-14 04:41:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 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) [2022-12-14 04:41:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-12-14 04:41:07,181 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 41 [2022-12-14 04:41:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:41:07,181 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-12-14 04:41:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-12-14 04:41:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 04:41:07,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:41:07,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:41:07,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:41:07,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:07,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:41:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:41:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2022-12-14 04:41:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:41:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154160215] [2022-12-14 04:41:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:41:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:41:07,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:41:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154160215] [2022-12-14 04:41:07,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154160215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:41:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135232480] [2022-12-14 04:41:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:07,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:41:07,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:41:07,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:41:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:41:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:41:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 04:41:07,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:41:07,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135232480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:07,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:41:07,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 04:41:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78569883] [2022-12-14 04:41:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:41:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:41:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:41:07,766 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:41:07,830 INFO L93 Difference]: Finished difference Result 225 states and 311 transitions. [2022-12-14 04:41:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:41:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-12-14 04:41:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:41:07,832 INFO L225 Difference]: With dead ends: 225 [2022-12-14 04:41:07,832 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 04:41:07,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:41:07,833 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 [2022-12-14 04:41:07,834 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] [2022-12-14 04:41:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 04:41:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2022-12-14 04:41:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.323943661971831) internal successors, (94), 74 states have internal predecessors, (94), 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) [2022-12-14 04:41:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2022-12-14 04:41:07,861 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 42 [2022-12-14 04:41:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:41:07,861 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2022-12-14 04:41:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:41:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2022-12-14 04:41:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 04:41:07,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:41:07,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:41:07,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:41:08,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:08,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:41:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:41:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2022-12-14 04:41:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:41:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112411003] [2022-12-14 04:41:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:41:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:41:08,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:41:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112411003] [2022-12-14 04:41:08,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112411003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:41:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561430404] [2022-12-14 04:41:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:08,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:41:08,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:41:08,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:41:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 04:41:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:41:08,533 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 04:41:08,533 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 04:41:08,545 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 04:41:08,546 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 04:41:08,553 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 10 treesize of output 9 [2022-12-14 04:41:08,561 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 [2022-12-14 04:41:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:08,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2022-12-14 04:41:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 04:41:21,436 WARN L233 SmtUtils]: Spent 8.82s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:41:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:41:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:41:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:41:25,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561430404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:41:25,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383495113] [2022-12-14 04:41:25,918 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 04:41:25,918 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:41:25,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:41:25,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:41:25,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:41:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:25,961 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:41:25,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:41:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,001 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:41:26,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:41:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:41:26,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:41:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:41:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:41:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:41:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:41:26,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:41:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:26,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:41:26,837 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-12-14 04:41:27,359 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-12-14 04:41:27,409 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:41:27,422 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 04:41:27,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:41:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1383495113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:32,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:41:32,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-12-14 04:41:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426481834] [2022-12-14 04:41:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:41:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:41:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 04:41:32,356 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:41:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:41:35,404 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2022-12-14 04:41:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 04:41:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-12-14 04:41:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:41:35,406 INFO L225 Difference]: With dead ends: 172 [2022-12-14 04:41:35,406 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 04:41:35,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 04:41:35,408 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 67 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:41:35,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 362 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 04:41:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 04:41:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-12-14 04:41:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.32) internal successors, (99), 79 states have internal predecessors, (99), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-12-14 04:41:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-12-14 04:41:35,439 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 45 [2022-12-14 04:41:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:41:35,439 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-12-14 04:41:35,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:41:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-12-14 04:41:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 04:41:35,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:41:35,440 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] [2022-12-14 04:41:35,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:41:35,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 04:41:35,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:41:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:41:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2022-12-14 04:41:35,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:41:35,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130670848] [2022-12-14 04:41:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:35,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:41:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:41:35,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:41:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130670848] [2022-12-14 04:41:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130670848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:41:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554680694] [2022-12-14 04:41:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:41:35,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:41:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:41:35,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:41:35,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:41:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:41:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 04:41:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:41:36,086 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 [2022-12-14 04:41:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:36,089 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 [2022-12-14 04:41:36,138 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 04:41:36,139 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 [2022-12-14 04:41:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:36,143 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 [2022-12-14 04:41:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:36,150 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 [2022-12-14 04:41:36,156 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 [2022-12-14 04:41:36,231 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse0 (select .cse1 24))) (and (not (= .cse0 0)) (= (select .cse1 0) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))))) is different from true [2022-12-14 04:41:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:41:48,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:41:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 04:41:51,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554680694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:41:51,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514466374] [2022-12-14 04:41:51,821 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 04:41:51,821 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:41:51,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:41:51,822 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:41:51,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:41:51,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:51,866 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:41:51,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:41:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:51,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 04:41:52,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:41:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:41:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:41:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:41:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:52,108 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 04:41:52,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 04:41:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:41:52,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,180 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 04:41:52,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 04:41:52,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:52,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:41:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,223 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 [2022-12-14 04:41:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,235 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 [2022-12-14 04:41:52,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:41:52,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:41:52,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:41:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 04:41:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:41:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:41:52,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:41:52,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:41:52,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:41:52,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 04:41:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 04:41:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:41:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 04:41:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 04:41:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:41:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:41:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:41:52,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:41:53,170 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-12-14 04:41:53,432 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-12-14 04:41:53,463 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:41:53,474 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 04:41:53,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:41:58,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [514466374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:41:58,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:41:58,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-12-14 04:41:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570439302] [2022-12-14 04:41:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:41:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:41:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:41:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:41:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2223, Unknown=136, NotChecked=98, Total=2652 [2022-12-14 04:41:58,884 INFO L87 Difference]: Start difference. First operand 118 states and 153 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) [2022-12-14 04:42:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:01,998 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2022-12-14 04:42:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 04:42:01,999 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 [2022-12-14 04:42:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:02,000 INFO L225 Difference]: With dead ends: 178 [2022-12-14 04:42:02,000 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 04:42:02,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=247, Invalid=2803, Unknown=146, NotChecked=110, Total=3306 [2022-12-14 04:42:02,001 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:02,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 206 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 04:42:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 04:42:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-12-14 04:42:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 82 states have internal predecessors, (103), 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) [2022-12-14 04:42:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2022-12-14 04:42:02,035 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 46 [2022-12-14 04:42:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:02,035 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2022-12-14 04:42:02,036 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) [2022-12-14 04:42:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2022-12-14 04:42:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 04:42:02,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:02,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:02,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:42:02,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 04:42:02,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2022-12-14 04:42:02,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261743818] [2022-12-14 04:42:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:02,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:42:02,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261743818] [2022-12-14 04:42:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261743818] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316941482] [2022-12-14 04:42:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:02,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:02,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:42:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 04:42:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 04:42:04,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:42:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316941482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025862192] [2022-12-14 04:42:06,462 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:42:06,462 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:42:06,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:42:06,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:42:06,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:42:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,498 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:42:06,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:42:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,538 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:42:06,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:42:06,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:42:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:42:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:42:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:42:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:42:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:06,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:42:07,322 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 128 for LOIs [2022-12-14 04:42:08,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 173 for LOIs [2022-12-14 04:42:08,120 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:42:08,132 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:42:08,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:42:13,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1025862192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:13,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:42:13,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-12-14 04:42:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660754186] [2022-12-14 04:42:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:42:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:42:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:42:13,968 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:42:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:18,497 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2022-12-14 04:42:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 04:42:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-12-14 04:42:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:18,499 INFO L225 Difference]: With dead ends: 191 [2022-12-14 04:42:18,499 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 04:42:18,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 04:42:18,500 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:18,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 249 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 04:42:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 04:42:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-12-14 04:42:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 83 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) [2022-12-14 04:42:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-12-14 04:42:18,536 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 47 [2022-12-14 04:42:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:18,536 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-12-14 04:42:18,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:42:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-12-14 04:42:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 04:42:18,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:18,537 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] [2022-12-14 04:42:18,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:42:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:18,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2022-12-14 04:42:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:18,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769866428] [2022-12-14 04:42:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:42:19,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769866428] [2022-12-14 04:42:19,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769866428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826522817] [2022-12-14 04:42:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:19,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:19,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:42:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:19,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 04:42:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:42:21,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:42:21,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826522817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:21,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4930762] [2022-12-14 04:42:21,402 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:42:21,402 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:42:21,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:42:21,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:42:21,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:42:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,445 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:42:21,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:42:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,487 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:42:21,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:42:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:21,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:42:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:42:21,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:42:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:42:21,754 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 04:42:21,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 04:42:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,814 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 04:42:21,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 04:42:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,834 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 [2022-12-14 04:42:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,847 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 [2022-12-14 04:42:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:42:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,882 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 [2022-12-14 04:42:21,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,935 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 29 treesize of output 17 [2022-12-14 04:42:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:42:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 04:42:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,961 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 71 treesize of output 19 [2022-12-14 04:42:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:21,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:42:21,986 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 [2022-12-14 04:42:22,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:42:22,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:42:22,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,048 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 59 treesize of output 13 [2022-12-14 04:42:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 04:42:22,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:42:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 04:42:22,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 04:42:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:42:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:42:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:22,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:42:22,690 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-12-14 04:42:23,288 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-12-14 04:42:23,326 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:42:23,339 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:42:23,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:42:30,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [4930762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:30,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:42:30,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-12-14 04:42:30,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755392323] [2022-12-14 04:42:30,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:42:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:42:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:42:30,503 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:42:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:33,931 INFO L93 Difference]: Finished difference Result 197 states and 251 transitions. [2022-12-14 04:42:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 04:42:33,932 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 [2022-12-14 04:42:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:33,933 INFO L225 Difference]: With dead ends: 197 [2022-12-14 04:42:33,933 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 04:42:33,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 04:42:33,934 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:33,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 165 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 04:42:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 04:42:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2022-12-14 04:42:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3125) internal successors, (105), 84 states have internal predecessors, (105), 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) [2022-12-14 04:42:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2022-12-14 04:42:33,972 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 48 [2022-12-14 04:42:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:33,972 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2022-12-14 04:42:33,972 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) [2022-12-14 04:42:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2022-12-14 04:42:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 04:42:33,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:33,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:33,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 04:42:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:34,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2022-12-14 04:42:34,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740939253] [2022-12-14 04:42:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:34,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 04:42:34,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740939253] [2022-12-14 04:42:34,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740939253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912449086] [2022-12-14 04:42:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:34,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:34,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:34,324 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:34,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:42:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 04:42:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:37,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:42:40,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912449086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:40,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327141707] [2022-12-14 04:42:40,645 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:42:40,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:42:40,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:42:40,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:42:40,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:42:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,689 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:42:40,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:42:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,725 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:42:40,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:42:40,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:42:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:42:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:42:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:42:41,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:42:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:41,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:42:42,117 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-12-14 04:42:42,184 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 04:42:42,735 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 04:42:42,737 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:42:42,750 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:42:42,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:42:52,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6397#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 16) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 8) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 16) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 2)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) (= 0 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 24)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 16) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 4)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)) 32) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0) 3)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_38|) 0)))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:42:52,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:42:52,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:42:52,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-12-14 04:42:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850014016] [2022-12-14 04:42:52,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:52,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 04:42:52,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 04:42:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 04:42:52,782 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-12-14 04:42:54,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:42:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:58,328 INFO L93 Difference]: Finished difference Result 475 states and 635 transitions. [2022-12-14 04:42:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 04:42:58,329 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) Word has length 48 [2022-12-14 04:42:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:58,330 INFO L225 Difference]: With dead ends: 475 [2022-12-14 04:42:58,330 INFO L226 Difference]: Without dead ends: 367 [2022-12-14 04:42:58,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 04:42:58,332 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 166 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:58,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 368 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1004 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 04:42:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-12-14 04:42:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 124. [2022-12-14 04:42:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.225) internal successors, (98), 84 states have internal predecessors, (98), 27 states have call successors, (27), 14 states have call predecessors, (27), 16 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2022-12-14 04:42:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2022-12-14 04:42:58,407 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 48 [2022-12-14 04:42:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:58,408 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2022-12-14 04:42:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-12-14 04:42:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2022-12-14 04:42:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 04:42:58,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:58,409 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-12-14 04:42:58,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 04:42:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 04:42:58,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash 870437201, now seen corresponding path program 1 times [2022-12-14 04:42:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014297570] [2022-12-14 04:42:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 04:42:58,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014297570] [2022-12-14 04:42:58,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014297570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412556324] [2022-12-14 04:42:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:58,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:58,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:42:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 04:42:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:42:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 04:42:59,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412556324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424297898] [2022-12-14 04:42:59,100 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:42:59,100 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:42:59,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:42:59,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:42:59,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:42:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,144 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:42:59,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:42:59,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,186 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:42:59,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:42:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:59,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:42:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:42:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:42:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:42:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:42:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:42:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:59,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:43:06,252 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2022-12-14 04:43:06,439 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 04:43:06,955 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-12-14 04:43:06,988 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:43:07,003 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:43:07,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:43:18,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7722#(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) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (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) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 16) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 1) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 8) 0) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 32) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| 0)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 24) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:43:18,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:43:18,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:43:18,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-12-14 04:43:18,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784443396] [2022-12-14 04:43:18,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:18,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 04:43:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 04:43:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 04:43:18,698 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 04:43:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:18,978 INFO L93 Difference]: Finished difference Result 258 states and 317 transitions. [2022-12-14 04:43:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 04:43:18,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2022-12-14 04:43:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:18,982 INFO L225 Difference]: With dead ends: 258 [2022-12-14 04:43:18,982 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 04:43:18,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 04:43:18,983 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:18,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 446 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:43:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 04:43:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 130. [2022-12-14 04:43:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 90 states have internal predecessors, (102), 27 states have call successors, (27), 14 states have call predecessors, (27), 18 states have return successors, (30), 25 states have call predecessors, (30), 25 states have call successors, (30) [2022-12-14 04:43:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-12-14 04:43:19,056 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 64 [2022-12-14 04:43:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:19,056 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-12-14 04:43:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 04:43:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-12-14 04:43:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 04:43:19,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:19,057 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:19,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:43:19,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 04:43:19,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1749815189, now seen corresponding path program 1 times [2022-12-14 04:43:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:19,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586790529] [2022-12-14 04:43:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:43:19,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586790529] [2022-12-14 04:43:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586790529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900929007] [2022-12-14 04:43:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:19,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:19,596 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:19,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:43:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 04:43:19,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:43:19,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 04:43:20,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900929007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:20,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405649194] [2022-12-14 04:43:20,063 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:43:20,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:43:20,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:43:20,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:43:20,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:43:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,110 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:43:20,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:43:20,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 04:43:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:43:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:43:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:43:20,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:43:20,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:43:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:43:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:43:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:20,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:43:21,451 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-12-14 04:43:21,508 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 04:43:22,039 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 04:43:22,040 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:43:22,054 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:43:22,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:43:30,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8738#(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 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (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) (= (select |#valid| 4) 1) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 3)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 0)) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0) 16) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:43:30,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:43:30,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:43:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-12-14 04:43:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209267004] [2022-12-14 04:43:30,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 04:43:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 04:43:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 04:43:30,341 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-12-14 04:43:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:31,798 INFO L93 Difference]: Finished difference Result 333 states and 414 transitions. [2022-12-14 04:43:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 04:43:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-12-14 04:43:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:31,800 INFO L225 Difference]: With dead ends: 333 [2022-12-14 04:43:31,800 INFO L226 Difference]: Without dead ends: 213 [2022-12-14 04:43:31,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=523, Invalid=5483, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 04:43:31,802 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 137 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:31,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 523 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 04:43:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-14 04:43:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2022-12-14 04:43:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 95 states have internal predecessors, (110), 28 states have call successors, (28), 14 states have call predecessors, (28), 18 states have return successors, (31), 27 states have call predecessors, (31), 26 states have call successors, (31) [2022-12-14 04:43:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2022-12-14 04:43:31,885 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 66 [2022-12-14 04:43:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:31,885 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2022-12-14 04:43:31,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-12-14 04:43:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2022-12-14 04:43:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 04:43:31,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:31,886 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] [2022-12-14 04:43:31,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 04:43:32,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:32,087 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:32,089 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 2 times [2022-12-14 04:43:32,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:32,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334905217] [2022-12-14 04:43:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:43:33,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:33,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334905217] [2022-12-14 04:43:33,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334905217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:33,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507369674] [2022-12-14 04:43:33,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:43:33,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:33,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:33,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:43:34,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:43:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-14 04:43:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:34,080 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 04:43:34,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 04:43:34,201 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 04:43:34,204 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:34,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 04:43:34,212 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:43:37,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:43,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:43:43,377 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 7909 treesize of output 7237 [2022-12-14 04:43:43,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:43:43,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 8917 treesize of output 8711 [2022-12-14 04:43:44,008 INFO L321 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2022-12-14 04:43:44,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 37429 treesize of output 34614 [2022-12-14 04:43:45,061 INFO L321 Elim1Store]: treesize reduction 10, result has 96.8 percent of original size [2022-12-14 04:43:45,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 34521 treesize of output 33360 [2022-12-14 04:43:45,976 INFO L321 Elim1Store]: treesize reduction 17, result has 94.6 percent of original size [2022-12-14 04:43:45,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 40653 treesize of output 39153 [2022-12-14 04:43:49,080 INFO L321 Elim1Store]: treesize reduction 17, result has 94.4 percent of original size [2022-12-14 04:43:49,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 37728 treesize of output 37610 [2022-12-14 04:51:14,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:51:14,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 456 treesize of output 521 [2022-12-14 04:51:19,707 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:19,883 INFO L321 Elim1Store]: treesize reduction 51, result has 1.9 percent of original size [2022-12-14 04:51:19,883 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 456 treesize of output 1 [2022-12-14 04:51:19,919 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:51:23,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 109 [2022-12-14 04:51:23,573 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,591 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,619 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,633 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,680 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,725 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,768 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,790 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 87 treesize of output 85 [2022-12-14 04:51:23,798 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 88 [2022-12-14 04:51:23,820 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:23,903 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 04:51:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 04:51:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507369674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:51:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504267238] [2022-12-14 04:51:24,752 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:51:24,752 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:51:24,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:51:24,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:51:24,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:51:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:24,805 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 04:51:24,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 04:51:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:24,854 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:51:24,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:51:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:51:25,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:51:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:51:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:51:25,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:51:25,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 04:51:25,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 04:51:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:51:25,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:51:32,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-12-14 04:51:32,613 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 146 for LOIs [2022-12-14 04:51:33,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-12-14 04:51:33,687 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:51:33,698 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:51:33,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:51:50,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9943#(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) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (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) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53| Int)) (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) 8))) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) 8)) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) 16) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (- 8))) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| 16) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) 1) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) 32) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (- 8))) 0) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_53|)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:51:50,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:51:50,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:51:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18] total 52 [2022-12-14 04:51:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890249479] [2022-12-14 04:51:50,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:51:50,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 04:51:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 04:51:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=5636, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 04:51:50,033 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand has 52 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 21 states have call successors, (30), 5 states have call predecessors, (30), 12 states have return successors, (29), 18 states have call predecessors, (29), 20 states have call successors, (29) [2022-12-14 04:51:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:58,617 INFO L93 Difference]: Finished difference Result 531 states and 684 transitions. [2022-12-14 04:51:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 04:51:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 21 states have call successors, (30), 5 states have call predecessors, (30), 12 states have return successors, (29), 18 states have call predecessors, (29), 20 states have call successors, (29) Word has length 67 [2022-12-14 04:51:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:58,620 INFO L225 Difference]: With dead ends: 531 [2022-12-14 04:51:58,620 INFO L226 Difference]: Without dead ends: 414 [2022-12-14 04:51:58,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 135 SyntacticMatches, 16 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1243, Invalid=10747, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 04:51:58,623 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 409 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:58,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 675 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 04:51:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-14 04:51:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2022-12-14 04:51:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 202 states have (on average 1.188118811881188) internal successors, (240), 212 states have internal predecessors, (240), 61 states have call successors, (61), 28 states have call predecessors, (61), 36 states have return successors, (71), 59 states have call predecessors, (71), 57 states have call successors, (71) [2022-12-14 04:51:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 372 transitions. [2022-12-14 04:51:58,814 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 372 transitions. Word has length 67 [2022-12-14 04:51:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:58,814 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 372 transitions. [2022-12-14 04:51:58,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 21 states have call successors, (30), 5 states have call predecessors, (30), 12 states have return successors, (29), 18 states have call predecessors, (29), 20 states have call successors, (29) [2022-12-14 04:51:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 372 transitions. [2022-12-14 04:51:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 04:51:58,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:58,815 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:58,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 04:51:59,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 04:51:59,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1298768452, now seen corresponding path program 1 times [2022-12-14 04:51:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:59,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839377484] [2022-12-14 04:51:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 04:51:59,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839377484] [2022-12-14 04:51:59,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839377484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:51:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333818115] [2022-12-14 04:51:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:59,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:51:59,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:51:59,936 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:51:59,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:52:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 04:52:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:00,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 04:52:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:00,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:52:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:00,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 04:52:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:00,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 04:52:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 04:52:00,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:52:00,710 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 Int) (v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1252 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1252) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1255) |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_1253)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)))) is different from false [2022-12-14 04:52:00,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:52:00,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 04:52:00,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:52:00,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-12-14 04:52:00,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-12-14 04:52:00,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-12-14 04:52:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 04:52:00,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:52:00,821 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 66 treesize of output 68 [2022-12-14 04:52:00,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 04:52:00,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:52:00,898 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 48 treesize of output 52 [2022-12-14 04:52:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-12-14 04:52:01,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333818115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:52:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112331232] [2022-12-14 04:52:01,051 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:52:01,051 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:52:01,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:52:01,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:52:01,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:52:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,099 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:52:01,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:52:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 04:52:01,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:52:01,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:52:01,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:52:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:52:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:52:01,353 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 04:52:01,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 04:52:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:52:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:52:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:52:01,400 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 04:52:01,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 04:52:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,468 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 04:52:01,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 04:52:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,497 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 [2022-12-14 04:52:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,517 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 [2022-12-14 04:52:01,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:52:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:52:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 04:52:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:52:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:52:01,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:52:01,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:52:01,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:52:01,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:52:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:52:01,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 04:52:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:52:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:52:01,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:52:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 04:52:01,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:52:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:52:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:01,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:52:02,763 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-12-14 04:52:02,768 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-12-14 04:52:03,731 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-12-14 04:52:03,760 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:52:03,775 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:52:03,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:52:09,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11681#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:52:09,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:52:09,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:52:09,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-12-14 04:52:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815353100] [2022-12-14 04:52:09,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:52:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 04:52:09,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 04:52:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3194, Unknown=1, NotChecked=114, Total=3540 [2022-12-14 04:52:09,749 INFO L87 Difference]: Start difference. First operand 300 states and 372 transitions. Second operand has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 04:52:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:11,373 INFO L93 Difference]: Finished difference Result 358 states and 448 transitions. [2022-12-14 04:52:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:52:11,373 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 68 [2022-12-14 04:52:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:11,375 INFO L225 Difference]: With dead ends: 358 [2022-12-14 04:52:11,376 INFO L226 Difference]: Without dead ends: 293 [2022-12-14 04:52:11,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=363, Invalid=4470, Unknown=1, NotChecked=136, Total=4970 [2022-12-14 04:52:11,377 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 241 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:11,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 815 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1361 Invalid, 0 Unknown, 135 Unchecked, 1.0s Time] [2022-12-14 04:52:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-12-14 04:52:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 237. [2022-12-14 04:52:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 160 states have (on average 1.175) internal successors, (188), 168 states have internal predecessors, (188), 48 states have call successors, (48), 22 states have call predecessors, (48), 28 states have return successors, (56), 46 states have call predecessors, (56), 45 states have call successors, (56) [2022-12-14 04:52:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 292 transitions. [2022-12-14 04:52:11,527 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 292 transitions. Word has length 68 [2022-12-14 04:52:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:11,527 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 292 transitions. [2022-12-14 04:52:11,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 04:52:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 292 transitions. [2022-12-14 04:52:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 04:52:11,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:11,528 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1] [2022-12-14 04:52:11,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 04:52:11,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:52:11,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:52:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1433923146, now seen corresponding path program 2 times [2022-12-14 04:52:11,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:52:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864262778] [2022-12-14 04:52:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:11,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:52:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 04:52:11,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:52:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864262778] [2022-12-14 04:52:11,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864262778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933272476] [2022-12-14 04:52:11,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:52:11,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:52:11,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:52:11,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 04:52:12,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:52:12,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:52:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 04:52:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:52:12,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:52:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933272476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:52:12,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:52:12,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 04:52:12,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580222438] [2022-12-14 04:52:12,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:52:12,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:52:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:52:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:52:12,206 INFO L87 Difference]: Start difference. First operand 237 states and 292 transitions. Second operand has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:52:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:12,468 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2022-12-14 04:52:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:52:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-12-14 04:52:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:12,470 INFO L225 Difference]: With dead ends: 411 [2022-12-14 04:52:12,470 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 04:52:12,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:52:12,472 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:12,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 209 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:52:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 04:52:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 237. [2022-12-14 04:52:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 160 states have (on average 1.175) internal successors, (188), 168 states have internal predecessors, (188), 48 states have call successors, (48), 22 states have call predecessors, (48), 28 states have return successors, (56), 46 states have call predecessors, (56), 45 states have call successors, (56) [2022-12-14 04:52:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 292 transitions. [2022-12-14 04:52:12,669 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 292 transitions. Word has length 71 [2022-12-14 04:52:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:12,670 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 292 transitions. [2022-12-14 04:52:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:52:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 292 transitions. [2022-12-14 04:52:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 04:52:12,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:12,671 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:52:12,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 04:52:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:12,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:52:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-12-14 04:52:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:52:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963468638] [2022-12-14 04:52:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:52:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 04:52:13,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:52:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963468638] [2022-12-14 04:52:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963468638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:52:13,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:52:13,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:52:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917949656] [2022-12-14 04:52:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:52:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:52:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:52:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:52:13,066 INFO L87 Difference]: Start difference. First operand 237 states and 292 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) [2022-12-14 04:52:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:13,430 INFO L93 Difference]: Finished difference Result 261 states and 318 transitions. [2022-12-14 04:52:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:52:13,431 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 [2022-12-14 04:52:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:13,433 INFO L225 Difference]: With dead ends: 261 [2022-12-14 04:52:13,433 INFO L226 Difference]: Without dead ends: 259 [2022-12-14 04:52:13,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:52:13,433 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:13,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 281 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:52:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-12-14 04:52:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2022-12-14 04:52:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.165680473372781) internal successors, (197), 177 states have internal predecessors, (197), 51 states have call successors, (51), 25 states have call predecessors, (51), 31 states have return successors, (59), 49 states have call predecessors, (59), 48 states have call successors, (59) [2022-12-14 04:52:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 307 transitions. [2022-12-14 04:52:13,608 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 307 transitions. Word has length 70 [2022-12-14 04:52:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:13,608 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 307 transitions. [2022-12-14 04:52:13,608 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) [2022-12-14 04:52:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 307 transitions. [2022-12-14 04:52:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 04:52:13,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:13,610 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:52:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 04:52:13,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:52:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash 683217571, now seen corresponding path program 3 times [2022-12-14 04:52:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:52:13,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452813959] [2022-12-14 04:52:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:52:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 04:52:14,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:52:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452813959] [2022-12-14 04:52:14,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452813959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100879858] [2022-12-14 04:52:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:52:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:52:14,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:52:14,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea8c444-d067-4617-8b42-1bf1423c19ab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 04:52:14,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:52:14,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:52:14,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 04:52:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:14,735 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 04:52:14,735 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 04:52:14,746 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 04:52:14,746 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 04:52:16,851 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_71| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_71| Int)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_71| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_71|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_71|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_71| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_71| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_71|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_71|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_71|))))) is different from true [2022-12-14 04:52:18,948 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_228| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_228| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_228|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_228| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_228|) 0) 16)))) is different from true [2022-12-14 04:52:23,033 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_67| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_67|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_67| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_67|) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_67|)))) is different from true [2022-12-14 04:52:33,106 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:47,185 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:57,269 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:53:07,391 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:53:15,490 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:53:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 04:53:15,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:53:18,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100879858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510225751] [2022-12-14 04:53:18,196 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 04:53:18,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:53:18,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:53:18,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:53:18,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:53:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,242 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 04:53:18,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 04:53:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 04:53:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 04:53:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:53:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 04:53:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 04:53:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,522 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 04:53:18,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 04:53:18,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,540 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 [2022-12-14 04:53:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:53:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 04:53:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,612 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 [2022-12-14 04:53:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,628 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 [2022-12-14 04:53:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:18,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:18,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,004 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 04:53:19,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 04:53:19,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:19,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,276 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 04:53:19,277 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 680 treesize of output 689 [2022-12-14 04:53:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:19,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 04:53:19,508 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 04:53:19,509 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 [2022-12-14 04:53:19,620 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 04:53:19,620 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 [2022-12-14 04:53:19,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:53:19,669 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 04:53:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-12-14 04:53:19,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 04:54:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:54:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 04:54:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,891 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 47 treesize of output 13 [2022-12-14 04:54:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 04:54:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 04:54:32,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:54:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:54:32,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 04:54:32,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 04:54:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:32,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 04:54:34,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-12-14 04:54:34,108 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-12-14 04:54:34,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-12-14 04:54:34,601 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 04:54:34,613 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 04:54:34,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:47,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14998#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24)))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_205|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_203| 0))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 04:54:47,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:47,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:47,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 14] total 39 [2022-12-14 04:54:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032085391] [2022-12-14 04:54:47,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 04:54:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 04:54:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3731, Unknown=13, NotChecked=378, Total=4422 [2022-12-14 04:54:47,637 INFO L87 Difference]: Start difference. First operand 252 states and 307 transitions. Second operand has 39 states, 35 states have (on average 3.0) internal successors, (105), 37 states have internal predecessors, (105), 18 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (29), 13 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 04:54:50,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:52,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:56,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:58,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]