./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/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_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 06:56:33,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:56:33,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:56:33,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:56:33,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:56:33,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:56:33,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:56:33,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:56:33,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:56:33,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:56:33,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:56:33,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:56:33,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:56:33,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:56:33,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:56:33,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:56:33,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:56:33,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:56:33,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:56:33,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:56:33,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:56:33,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:56:33,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:56:33,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:56:33,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:56:33,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:56:33,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:56:33,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:56:33,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:56:33,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:56:33,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:56:33,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:56:33,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:56:33,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:56:33,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:56:33,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:56:33,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:56:33,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:56:33,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:56:33,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:56:33,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:56:33,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:56:33,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:56:33,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:56:33,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:56:33,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:56:33,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:56:33,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:56:33,708 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:56:33,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:56:33,709 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:56:33,709 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:56:33,710 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:56:33,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:56:33,711 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:56:33,711 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:56:33,711 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:56:33,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:56:33,712 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:56:33,712 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:56:33,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:56:33,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:56:33,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:56:33,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:56:33,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:56:33,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:56:33,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:56:33,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:56:33,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:56:33,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:56:33,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:56:33,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:33,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:56:33,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:56:33,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:56:33,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:56:33,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:56:33,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:56:33,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:56:33,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:56:33,718 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_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-11-19 06:56:34,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:56:34,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:56:34,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:56:34,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:56:34,080 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:56:34,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-19 06:56:34,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/data/1e297667b/c4c797d0946d43fd9aeb0b7ac3e44404/FLAG999d8a39c [2022-11-19 06:56:34,916 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:56:34,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-19 06:56:34,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/data/1e297667b/c4c797d0946d43fd9aeb0b7ac3e44404/FLAG999d8a39c [2022-11-19 06:56:35,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/data/1e297667b/c4c797d0946d43fd9aeb0b7ac3e44404 [2022-11-19 06:56:35,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:56:35,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:56:35,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:35,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:56:35,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:56:35,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:35" (1/1) ... [2022-11-19 06:56:35,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6501f34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:35, skipping insertion in model container [2022-11-19 06:56:35,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:35" (1/1) ... [2022-11-19 06:56:35,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:56:35,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:56:35,549 WARN L234 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_4956ef68-57f9-470d-8243-147203a417af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-19 06:56:35,556 WARN L234 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_4956ef68-57f9-470d-8243-147203a417af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-19 06:56:36,314 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,314 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,315 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,316 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,317 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,331 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,332 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,334 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,335 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,338 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,339 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,339 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,340 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,682 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:56:36,684 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:56:36,685 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:56:36,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:56:36,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:56:36,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:56:36,689 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:56:36,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:56:36,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:56:36,691 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:56:36,839 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:56:36,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:36,873 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:56:36,907 WARN L234 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_4956ef68-57f9-470d-8243-147203a417af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-19 06:56:36,908 WARN L234 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_4956ef68-57f9-470d-8243-147203a417af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-19 06:56:36,942 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,943 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,943 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,944 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,945 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,952 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,952 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,953 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,954 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,955 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,955 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,956 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,956 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:56:36,989 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:56:36,990 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:56:36,991 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:56:36,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:56:36,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:56:36,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:56:36,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:56:36,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:56:36,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:56:36,996 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:56:37,021 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:56:37,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:37,219 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:56:37,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37 WrapperNode [2022-11-19 06:56:37,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:37,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:37,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:56:37,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:56:37,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,340 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-19 06:56:37,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:37,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:56:37,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:56:37,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:56:37,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:56:37,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:56:37,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:56:37,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:56:37,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (1/1) ... [2022-11-19 06:56:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:37,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:56:37,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:56:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:56:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:56:37,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:56:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-19 06:56:37,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-19 06:56:37,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:56:37,477 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-19 06:56:37,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-19 06:56:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:56:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:56:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:56:37,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:56:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:56:37,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:56:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:56:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:56:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:56:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 06:56:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 06:56:37,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:56:37,791 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:56:37,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:56:38,081 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:56:38,281 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:56:38,282 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:56:38,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:38 BoogieIcfgContainer [2022-11-19 06:56:38,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:56:38,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:56:38,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:56:38,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:56:38,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:56:35" (1/3) ... [2022-11-19 06:56:38,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34291f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:38, skipping insertion in model container [2022-11-19 06:56:38,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:37" (2/3) ... [2022-11-19 06:56:38,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34291f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:38, skipping insertion in model container [2022-11-19 06:56:38,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:38" (3/3) ... [2022-11-19 06:56:38,293 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-11-19 06:56:38,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:56:38,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:56:38,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:56:38,365 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;@205fe4ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:56:38,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:56:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:56:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:56:38,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:38,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:38,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2022-11-19 06:56:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709022656] [2022-11-19 06:56:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:56:39,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709022656] [2022-11-19 06:56:39,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709022656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876567546] [2022-11-19 06:56:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:39,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:39,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:56:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 06:56:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:39,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:56:39,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:56:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-19 06:56:39,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:39,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-19 06:56:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:56:41,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:41,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876567546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:41,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:56:41,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-19 06:56:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684474285] [2022-11-19 06:56:41,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:41,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:56:41,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:56:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:56:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:56:41,586 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) [2022-11-19 06:56:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:41,950 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-11-19 06:56:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:56:41,953 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 [2022-11-19 06:56:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:41,961 INFO L225 Difference]: With dead ends: 101 [2022-11-19 06:56:41,961 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 06:56:41,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:56:41,967 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:41,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 239 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 69 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-11-19 06:56:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 06:56:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-11-19 06:56:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:56:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-19 06:56:42,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 37 [2022-11-19 06:56:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:42,016 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-19 06:56:42,016 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) [2022-11-19 06:56:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-19 06:56:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:56:42,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:42,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:42,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:56:42,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2022-11-19 06:56:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:42,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612452394] [2022-11-19 06:56:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:56:42,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612452394] [2022-11-19 06:56:42,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612452394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:42,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144251382] [2022-11-19 06:56:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:42,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:42,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:56:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 06:56:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:42,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:56:42,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:56:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 06:56:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 06:56:43,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 06:56:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 06:56:43,178 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:56:43,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-19 06:56:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-19 06:56:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 06:56:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:43,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-19 06:56:43,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:56:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:56:44,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:48,820 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 [2022-11-19 06:56:48,929 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 [2022-11-19 06:56:48,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:56:48,995 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 [2022-11-19 06:56:49,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:56:49,009 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 [2022-11-19 06:56:49,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 148 [2022-11-19 06:56:49,029 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 [2022-11-19 06:56:49,085 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 [2022-11-19 06:56:49,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:56:49,141 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 [2022-11-19 06:56:49,229 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:56:49,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:56:49,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:56:49,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-19 06:56:49,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:49,272 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 [2022-11-19 06:56:49,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:56:49,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-19 06:56:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:49,296 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 [2022-11-19 06:56:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,316 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 06:56:49,317 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 [2022-11-19 06:56:49,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,328 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 [2022-11-19 06:56:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,352 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 [2022-11-19 06:56:49,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,370 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:56:49,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:56:49,379 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-19 06:56:49,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:49,390 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:56:49,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:56:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-19 06:56:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144251382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:49,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141915765] [2022-11-19 06:56:49,518 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:56:49,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:56:49,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:56:49,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:56:49,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:56:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:49,637 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 06:56:49,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 06:56:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:49,712 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:56:49,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:56:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:56:50,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:56:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:56:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:56:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,239 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:56:50,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:56:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:56:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:56:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:56:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:56:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:56:50,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:50,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,069 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 06:56:51,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-19 06:56:51,541 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-19 06:56:51,542 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 [2022-11-19 06:56:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:51,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:51,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:51,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:51,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:51,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:51,942 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-19 06:56:51,943 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 [2022-11-19 06:56:52,104 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-19 06:56:52,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-19 06:56:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:52,181 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 06:56:52,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-19 06:56:52,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-19 06:57:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:57:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:57:00,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:57:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:57:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:57:00,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:57:00,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:57:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:57:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:57:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:57:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:57:01,125 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-19 06:57:01,381 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-19 06:57:01,466 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:57:01,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:04,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1141915765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:04,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:04,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-11-19 06:57:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551937859] [2022-11-19 06:57:04,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:04,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:57:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:57:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=666, Unknown=6, NotChecked=106, Total=870 [2022-11-19 06:57:04,594 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:57:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:05,245 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-11-19 06:57:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:57:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-19 06:57:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:05,255 INFO L225 Difference]: With dead ends: 87 [2022-11-19 06:57:05,255 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 06:57:05,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=101, Invalid=713, Unknown=6, NotChecked=110, Total=930 [2022-11-19 06:57:05,257 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:05,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 346 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-19 06:57:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 06:57:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-19 06:57:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:57:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-19 06:57:05,294 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-19 06:57:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:05,295 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-19 06:57:05,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:57:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-19 06:57:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 06:57:05,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:05,296 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:05,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:05,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:05,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:05,498 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2022-11-19 06:57:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:05,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848548453] [2022-11-19 06:57:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:05,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:05,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848548453] [2022-11-19 06:57:05,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848548453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016059506] [2022-11-19 06:57:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:05,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:05,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:05,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:05,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:57:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:57:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:57:05,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:05,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016059506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:05,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:57:05,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 06:57:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655316013] [2022-11-19 06:57:05,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:57:05,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:57:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:57:05,918 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:06,078 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-19 06:57:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:57:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-19 06:57:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:06,080 INFO L225 Difference]: With dead ends: 86 [2022-11-19 06:57:06,080 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 06:57:06,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:57:06,081 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:06,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 06:57:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-19 06:57:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:57:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-19 06:57:06,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-19 06:57:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:06,100 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-19 06:57:06,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-19 06:57:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:57:06,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:06,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:06,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:06,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2022-11-19 06:57:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:06,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391445368] [2022-11-19 06:57:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:06,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:06,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391445368] [2022-11-19 06:57:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391445368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412642373] [2022-11-19 06:57:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:06,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:06,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:06,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:57:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:57:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:57:06,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:06,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412642373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:06,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:57:06,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 06:57:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88228832] [2022-11-19 06:57:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:57:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:57:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:57:06,780 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:07,015 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-19 06:57:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:57:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-19 06:57:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:07,017 INFO L225 Difference]: With dead ends: 103 [2022-11-19 06:57:07,017 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 06:57:07,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:57:07,019 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:07,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 06:57:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-19 06:57:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:57:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-19 06:57:07,037 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-19 06:57:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:07,037 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-19 06:57:07,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-19 06:57:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 06:57:07,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:07,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:07,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:07,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:07,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2022-11-19 06:57:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:07,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097230431] [2022-11-19 06:57:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:07,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097230431] [2022-11-19 06:57:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097230431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999259713] [2022-11-19 06:57:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:07,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:07,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:57:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:57:07,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:57:07,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:07,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999259713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:07,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:57:07,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-19 06:57:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375282308] [2022-11-19 06:57:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:57:07,734 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:07,798 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-19 06:57:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-19 06:57:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:07,800 INFO L225 Difference]: With dead ends: 104 [2022-11-19 06:57:07,800 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 06:57:07,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:57:07,802 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:07,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 06:57:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-19 06:57:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:57:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-19 06:57:07,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-19 06:57:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:07,820 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-19 06:57:07,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:57:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-19 06:57:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:57:07,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:07,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:07,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:08,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2022-11-19 06:57:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:08,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860945801] [2022-11-19 06:57:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:08,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860945801] [2022-11-19 06:57:08,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860945801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800151715] [2022-11-19 06:57:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:08,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:08,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:08,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:08,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:57:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:08,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 06:57:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:08,633 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 06:57:08,634 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 [2022-11-19 06:57:08,654 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:57:08,655 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 [2022-11-19 06:57:08,665 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 [2022-11-19 06:57:08,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:57:08,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:08,699 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 [2022-11-19 06:57:08,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:57:20,591 WARN L233 SmtUtils]: Spent 10.09s 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) [2022-11-19 06:57:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800151715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366736209] [2022-11-19 06:57:27,561 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:57:27,562 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:27,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:27,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:27,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:27,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,636 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 06:57:27,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 06:57:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,706 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:57:27,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:57:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:57:27,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:57:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:57:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:57:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:57:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:57:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:57:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:28,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:57:28,956 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-19 06:57:29,584 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-19 06:57:29,664 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:57:29,683 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 06:57:29,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:36,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [366736209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:36,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:36,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-19 06:57:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633187854] [2022-11-19 06:57:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:36,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:57:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:36,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:57:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:57:36,705 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:57:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:37,702 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2022-11-19 06:57:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 06:57:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-19 06:57:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:37,704 INFO L225 Difference]: With dead ends: 127 [2022-11-19 06:57:37,704 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 06:57:37,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:57:37,706 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:37,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 448 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 156 Unchecked, 0.9s Time] [2022-11-19 06:57:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 06:57:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-19 06:57:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-19 06:57:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-11-19 06:57:37,739 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 45 [2022-11-19 06:57:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:37,739 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-11-19 06:57:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:57:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-11-19 06:57:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:57:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:37,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:37,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:57:37,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2022-11-19 06:57:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289580075] [2022-11-19 06:57:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:57:38,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:38,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289580075] [2022-11-19 06:57:38,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289580075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:38,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173521268] [2022-11-19 06:57:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:38,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:38,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:38,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:57:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-19 06:57:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:38,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 06:57:38,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:38,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:57:38,641 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:57:38,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-19 06:57:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:38,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-19 06:57:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:38,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-19 06:57:38,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:57:38,766 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 [2022-11-19 06:57:50,593 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:57:52,727 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|)) (.cse0 (select .cse2 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 8) 0) (not (= .cse0 0)) (= (select .cse1 16) 0) (= (select .cse2 8) 0) (= .cse0 (select v_DerPreprocessor_23 24)) (= .cse0 (select .cse2 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|))) (let ((.cse3 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|)) (.cse4 (select .cse5 24))) (and (= (select .cse3 16) 0) (= .cse4 (select v_DerPreprocessor_25 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4)) (= (select .cse5 16) 0) (= .cse4 (select .cse5 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse3 8) 0) (<= (+ 2 .cse4) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse5 8) 0) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse6 (select .cse7 24))) (and (not (= .cse6 0)) (= (select .cse7 0) .cse6) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse6 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (= .cse6 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse6) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|)))))) is different from true [2022-11-19 06:57:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-11-19 06:57:56,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:58:01,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173521268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583672154] [2022-11-19 06:58:01,356 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:58:01,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:01,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:01,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:01,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,436 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:58:01,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:58:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:58:01,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:58:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:58:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:01,883 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:58:01,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:58:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:58:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,008 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:58:02,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:58:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:02,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:58:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:58:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:58:02,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:58:02,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:58:02,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:58:02,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 06:58:02,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:58:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:58:02,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:58:02,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:58:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:58:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:58:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:58:02,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:58:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:58:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,487 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 [2022-11-19 06:58:02,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:58:02,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:02,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:58:03,463 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 06:58:03,878 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-19 06:58:03,930 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:58:03,948 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 06:58:04,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:11,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [583672154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:11,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:11,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-19 06:58:11,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057996533] [2022-11-19 06:58:11,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:11,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:58:11,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:58:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2164, Unknown=107, NotChecked=194, Total=2652 [2022-11-19 06:58:11,039 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:58:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:12,219 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2022-11-19 06:58:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:58:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-19 06:58:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:12,222 INFO L225 Difference]: With dead ends: 120 [2022-11-19 06:58:12,222 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 06:58:12,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=202, Invalid=2345, Unknown=113, NotChecked=202, Total=2862 [2022-11-19 06:58:12,224 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:12,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 180 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 222 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-11-19 06:58:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 06:58:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-11-19 06:58:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-19 06:58:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-19 06:58:12,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 46 [2022-11-19 06:58:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:12,256 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-19 06:58:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:58:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-19 06:58:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:58:12,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:12,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:12,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:12,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:58:12,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:58:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2022-11-19 06:58:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867698364] [2022-11-19 06:58:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:13,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867698364] [2022-11-19 06:58:13,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867698364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451039711] [2022-11-19 06:58:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:13,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:13,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:13,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:58:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 06:58:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:58:17,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:17,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451039711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:17,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250172097] [2022-11-19 06:58:17,386 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:58:17,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:17,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:17,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:17,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,449 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 06:58:17,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 06:58:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,517 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:58:17,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:58:17,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:58:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:17,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:58:17,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:58:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:58:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:58:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:17,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:58:18,710 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 128 for LOIs [2022-11-19 06:58:19,655 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 173 for LOIs [2022-11-19 06:58:19,723 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:58:19,754 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:58:19,811 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [250172097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:28,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 06:58:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2546590] [2022-11-19 06:58:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:58:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:58:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 06:58:28,083 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:58:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:32,467 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2022-11-19 06:58:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:58:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-19 06:58:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:32,479 INFO L225 Difference]: With dead ends: 153 [2022-11-19 06:58:32,479 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 06:58:32,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:58:32,481 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 110 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:32,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 197 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 370 Invalid, 0 Unknown, 199 Unchecked, 1.2s Time] [2022-11-19 06:58:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 06:58:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-19 06:58:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-11-19 06:58:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-11-19 06:58:32,545 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 47 [2022-11-19 06:58:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:32,545 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-11-19 06:58:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:58:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-11-19 06:58:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:58:32,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:32,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:32,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 06:58:32,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:58:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2022-11-19 06:58:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221448956] [2022-11-19 06:58:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:32,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:58:32,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221448956] [2022-11-19 06:58:32,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221448956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681118929] [2022-11-19 06:58:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:32,955 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:32,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:58:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-19 06:58:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:58:38,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:58:42,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681118929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:42,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949853435] [2022-11-19 06:58:42,733 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:58:42,733 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:42,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:42,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:42,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:42,794 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 06:58:42,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 06:58:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:42,854 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:58:42,854 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 [2022-11-19 06:58:43,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:58:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:58:43,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:58:43,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:58:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:58:43,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,295 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 50 treesize of output 28 [2022-11-19 06:58:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:43,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:58:44,804 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-19 06:58:44,875 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 06:58:45,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 06:58:45,614 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:58:45,632 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:58:45,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:59,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4117#(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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:59,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:59,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:59,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-19 06:58:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481971779] [2022-11-19 06:58:59,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:59,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:58:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:58:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:58:59,162 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-19 06:59:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:01,174 INFO L93 Difference]: Finished difference Result 213 states and 307 transitions. [2022-11-19 06:59:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 06:59:01,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 48 [2022-11-19 06:59:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:01,177 INFO L225 Difference]: With dead ends: 213 [2022-11-19 06:59:01,177 INFO L226 Difference]: Without dead ends: 145 [2022-11-19 06:59:01,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 06:59:01,179 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:01,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 370 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 478 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-11-19 06:59:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-19 06:59:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2022-11-19 06:59:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 77 states have internal predecessors, (88), 29 states have call successors, (29), 13 states have call predecessors, (29), 14 states have return successors, (38), 27 states have call predecessors, (38), 28 states have call successors, (38) [2022-11-19 06:59:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2022-11-19 06:59:01,242 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 48 [2022-11-19 06:59:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:01,242 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2022-11-19 06:59:01,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-19 06:59:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2022-11-19 06:59:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:59:01,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:01,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:01,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:01,446 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1274670411, now seen corresponding path program 1 times [2022-11-19 06:59:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:01,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609519347] [2022-11-19 06:59:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 06:59:02,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609519347] [2022-11-19 06:59:02,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609519347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155218861] [2022-11-19 06:59:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:02,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:02,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:59:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 06:59:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:59:05,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 06:59:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155218861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153664882] [2022-11-19 06:59:05,726 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:59:05,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:05,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:05,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:05,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:05,790 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:59:05,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:59:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:05,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:59:06,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:59:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:59:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:59:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:06,183 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:59:06,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:59:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,267 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:59:06,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:59:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:59:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:06,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:59:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:59:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:59:06,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 06:59:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 06:59:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:59:06,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:59:06,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:59:06,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:59:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:59:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:59:06,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:59:06,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:59:06,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:59:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,701 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 [2022-11-19 06:59:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:59:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:59:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:06,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:59:07,321 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 06:59:08,048 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 06:59:08,090 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:59:08,106 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:59:08,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:14,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [153664882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:14,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:14,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 06:59:14,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788339407] [2022-11-19 06:59:14,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:59:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:14,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:59:14,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 06:59:14,533 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:59:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:15,680 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-11-19 06:59:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 06:59:15,681 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 64 [2022-11-19 06:59:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:15,682 INFO L225 Difference]: With dead ends: 240 [2022-11-19 06:59:15,682 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 06:59:15,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:59:15,684 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:15,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 140 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 157 Unchecked, 0.4s Time] [2022-11-19 06:59:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 06:59:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122. [2022-11-19 06:59:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 29 states have call successors, (29), 13 states have call predecessors, (29), 14 states have return successors, (30), 26 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-19 06:59:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-11-19 06:59:15,749 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 64 [2022-11-19 06:59:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-11-19 06:59:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:59:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-11-19 06:59:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:59:15,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:15,751 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] [2022-11-19 06:59:15,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:15,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:15,958 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash 557997523, now seen corresponding path program 1 times [2022-11-19 06:59:15,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:15,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456557977] [2022-11-19 06:59:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:15,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 06:59:16,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456557977] [2022-11-19 06:59:16,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456557977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090290015] [2022-11-19 06:59:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:16,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:16,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:16,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:16,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:59:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 06:59:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:59:16,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 06:59:16,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090290015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:16,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782228049] [2022-11-19 06:59:16,740 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:59:16,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:16,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:16,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:16,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:16,805 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 06:59:16,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 06:59:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:16,875 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:59:16,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:59:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:17,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:59:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:59:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:59:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:59:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:59:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:17,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:59:26,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-19 06:59:27,185 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 06:59:27,905 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 06:59:27,954 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:59:27,970 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:59:28,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:44,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6009#(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$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51| Int)) (and (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) 4)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 16) 0) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 8) 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 8) 0))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:44,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:44,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-11-19 06:59:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093878964] [2022-11-19 06:59:44,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:44,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:59:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:59:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:59:44,969 INFO L87 Difference]: Start difference. First operand 122 states and 150 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) [2022-11-19 06:59:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:45,286 INFO L93 Difference]: Finished difference Result 192 states and 247 transitions. [2022-11-19 06:59:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:59:45,291 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 [2022-11-19 06:59:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:45,292 INFO L225 Difference]: With dead ends: 192 [2022-11-19 06:59:45,292 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 06:59:45,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:59:45,294 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:45,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 06:59:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2022-11-19 06:59:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.1625) internal successors, (93), 85 states have internal predecessors, (93), 29 states have call successors, (29), 13 states have call predecessors, (29), 15 states have return successors, (33), 26 states have call predecessors, (33), 28 states have call successors, (33) [2022-11-19 06:59:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-11-19 06:59:45,352 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 64 [2022-11-19 06:59:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:45,352 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-11-19 06:59:45,353 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) [2022-11-19 06:59:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-11-19 06:59:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 06:59:45,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:45,354 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:45,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:59:45,561 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1356635027, now seen corresponding path program 1 times [2022-11-19 06:59:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070177506] [2022-11-19 06:59:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:59:46,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070177506] [2022-11-19 06:59:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070177506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147148409] [2022-11-19 06:59:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:46,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:46,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:46,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:59:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:59:46,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:46,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 06:59:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147148409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891452056] [2022-11-19 06:59:47,007 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:59:47,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:47,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:47,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:47,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,078 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:59:47,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 06:59:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:59:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:59:47,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:59:47,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:59:47,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:59:47,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:59:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:59:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:47,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:59:48,934 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-19 06:59:49,000 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-19 06:59:49,536 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 06:59:49,538 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 06:59:49,554 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:59:49,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:00,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6929#(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 [2022-11-19 07:00:00,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:00,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-19 07:00:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125232525] [2022-11-19 07:00:00,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:00:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:00:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:00:00,590 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-19 07:00:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:02,440 INFO L93 Difference]: Finished difference Result 272 states and 399 transitions. [2022-11-19 07:00:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:00:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-19 07:00:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:02,443 INFO L225 Difference]: With dead ends: 272 [2022-11-19 07:00:02,443 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 07:00:02,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=532, Invalid=5630, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:00:02,446 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:02,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 513 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:00:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 07:00:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 168. [2022-11-19 07:00:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 111 states have internal predecessors, (122), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (58), 43 states have call predecessors, (58), 44 states have call successors, (58) [2022-11-19 07:00:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 225 transitions. [2022-11-19 07:00:02,587 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 225 transitions. Word has length 66 [2022-11-19 07:00:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:02,587 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 225 transitions. [2022-11-19 07:00:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-19 07:00:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 225 transitions. [2022-11-19 07:00:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:00:02,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:02,590 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] [2022-11-19 07:00:02,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:02,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:00:02,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 907432197, now seen corresponding path program 1 times [2022-11-19 07:00:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:02,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592766935] [2022-11-19 07:00:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:02,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:00:04,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592766935] [2022-11-19 07:00:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592766935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479603524] [2022-11-19 07:00:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:04,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:04,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:00:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 07:00:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:04,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:00:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:04,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:00:04,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:04,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:00:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:04,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-19 07:00:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:05,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:05,487 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1176 Int) (v_ArrVal_1175 (Array Int Int)) (v_ArrVal_1174 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1175) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1174) |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_1176)) |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 [2022-11-19 07:00:05,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:05,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:00:05,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:05,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-19 07:00:05,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-11-19 07:00:05,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-11-19 07:00:05,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:00:05,612 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 50 treesize of output 48 [2022-11-19 07:00:05,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:05,620 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 59 treesize of output 63 [2022-11-19 07:00:05,651 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 [2022-11-19 07:00:05,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:00:05,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:05,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-11-19 07:00:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-11-19 07:00:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479603524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137088378] [2022-11-19 07:00:05,893 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:00:05,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:05,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:05,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:05,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:05,966 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:00:05,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:00:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:05,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 07:00:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:00:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:00:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:00:06,278 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 24 treesize of output 9 [2022-11-19 07:00:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:06,354 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:00:06,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:00:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,436 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:00:06,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-19 07:00:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,527 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:00:06,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:00:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:00:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:00:06,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:00:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:00:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:00:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:00:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:00:06,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:00:06,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:00:06,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:00:06,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:00:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:00:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:00:06,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:00:06,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:00:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:00:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:06,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:00:07,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:07,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:00:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:07,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:00:08,363 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-19 07:00:08,368 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-11-19 07:00:09,635 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:00:09,671 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:00:09,690 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:00:09,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:17,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8103#(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 [2022-11-19 07:00:17,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:17,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:17,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-11-19 07:00:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339231764] [2022-11-19 07:00:17,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:17,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:00:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:00:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3194, Unknown=1, NotChecked=114, Total=3540 [2022-11-19 07:00:17,130 INFO L87 Difference]: Start difference. First operand 168 states and 225 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) [2022-11-19 07:00:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:18,518 INFO L93 Difference]: Finished difference Result 224 states and 294 transitions. [2022-11-19 07:00:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:00:18,518 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 [2022-11-19 07:00:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:18,520 INFO L225 Difference]: With dead ends: 224 [2022-11-19 07:00:18,520 INFO L226 Difference]: Without dead ends: 171 [2022-11-19 07:00:18,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=325, Invalid=4234, Unknown=1, NotChecked=132, Total=4692 [2022-11-19 07:00:18,522 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 137 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:18,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 641 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 676 Invalid, 0 Unknown, 237 Unchecked, 0.7s Time] [2022-11-19 07:00:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-19 07:00:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2022-11-19 07:00:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 109 states have internal predecessors, (120), 37 states have call successors, (37), 14 states have call predecessors, (37), 19 states have return successors, (52), 35 states have call predecessors, (52), 36 states have call successors, (52) [2022-11-19 07:00:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 209 transitions. [2022-11-19 07:00:18,606 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 209 transitions. Word has length 68 [2022-11-19 07:00:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:18,607 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 209 transitions. [2022-11-19 07:00:18,607 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) [2022-11-19 07:00:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 209 transitions. [2022-11-19 07:00:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:00:18,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:18,609 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:18,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:18,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 2 times [2022-11-19 07:00:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641561231] [2022-11-19 07:00:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:18,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:00:21,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641561231] [2022-11-19 07:00:21,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641561231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696437192] [2022-11-19 07:00:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:00:21,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:21,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:21,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:00:21,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:00:21,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:00:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-19 07:00:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:00:24,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:31,417 INFO L321 Elim1Store]: treesize reduction 95, result has 1.0 percent of original size [2022-11-19 07:00:31,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 1 [2022-11-19 07:00:33,121 INFO L321 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2022-11-19 07:00:33,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 146 [2022-11-19 07:00:33,255 INFO L321 Elim1Store]: treesize reduction 24, result has 68.0 percent of original size [2022-11-19 07:00:33,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 137 [2022-11-19 07:00:44,366 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-19 07:00:44,367 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 1 [2022-11-19 07:00:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:00:44,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696437192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:44,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112046544] [2022-11-19 07:00:44,611 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:00:44,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:44,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:44,612 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:44,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,669 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:00:44,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 07:00:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,730 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:00:44,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:00:44,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:00:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:44,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:00:44,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:00:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,031 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 [2022-11-19 07:00:45,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:00:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:00:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 07:00:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:00:54,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-19 07:00:54,766 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 32 for LOIs [2022-11-19 07:00:55,798 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:00:55,839 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:00:55,854 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:00:55,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:01:17,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9174#(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$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 16) 0) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 8) 0) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) 0) 16) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 32) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|))) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:01:17,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:01:17,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:17,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 20] total 56 [2022-11-19 07:01:17,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774039633] [2022-11-19 07:01:17,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:17,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:01:17,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:01:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=6532, Unknown=3, NotChecked=0, Total=6972 [2022-11-19 07:01:17,251 INFO L87 Difference]: Start difference. First operand 159 states and 209 transitions. Second operand has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-19 07:01:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:27,029 INFO L93 Difference]: Finished difference Result 389 states and 578 transitions. [2022-11-19 07:01:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 07:01:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) Word has length 67 [2022-11-19 07:01:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:27,033 INFO L225 Difference]: With dead ends: 389 [2022-11-19 07:01:27,033 INFO L226 Difference]: Without dead ends: 304 [2022-11-19 07:01:27,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=1233, Invalid=16056, Unknown=3, NotChecked=0, Total=17292 [2022-11-19 07:01:27,038 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 403 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 3904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:27,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 901 Invalid, 3904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3128 Invalid, 0 Unknown, 459 Unchecked, 3.9s Time] [2022-11-19 07:01:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-19 07:01:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 199. [2022-11-19 07:01:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 130 states have (on average 1.146153846153846) internal successors, (149), 136 states have internal predecessors, (149), 45 states have call successors, (45), 19 states have call predecessors, (45), 23 states have return successors, (56), 43 states have call predecessors, (56), 44 states have call successors, (56) [2022-11-19 07:01:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2022-11-19 07:01:27,167 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 67 [2022-11-19 07:01:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:27,168 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2022-11-19 07:01:27,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-19 07:01:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2022-11-19 07:01:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:01:27,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:27,170 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:27,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:01:27,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:01:27,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:01:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1081195759, now seen corresponding path program 3 times [2022-11-19 07:01:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:27,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677857475] [2022-11-19 07:01:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:27,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:01:28,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677857475] [2022-11-19 07:01:28,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677857475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307555704] [2022-11-19 07:01:28,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:01:28,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:28,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:29,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:29,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:01:29,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:01:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 07:01:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:29,460 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:01:29,461 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 [2022-11-19 07:01:29,477 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:01:29,478 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 [2022-11-19 07:01:54,692 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:01:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:01:54,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:01:55,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307555704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319013209] [2022-11-19 07:01:55,927 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:01:55,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:55,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:01:55,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:01:55,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:01:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,001 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:01:56,001 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 [2022-11-19 07:01:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 07:01:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:01:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:01:56,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:01:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:01:56,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:01:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:01:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:01:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:56,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 07:02:06,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-19 07:02:06,842 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 143 for LOIs [2022-11-19 07:02:08,064 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:02:08,103 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:02:08,120 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:02:08,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:02:28,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10661#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| Int)) (and (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0) 4)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 24)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 8) 0) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 32) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0) 3)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0) 2)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 16) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) 0)) 8) 0))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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 [2022-11-19 07:02:28,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:02:28,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:28,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 39 [2022-11-19 07:02:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224067211] [2022-11-19 07:02:28,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 07:02:28,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 07:02:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3993, Unknown=7, NotChecked=0, Total=4422 [2022-11-19 07:02:28,969 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-19 07:02:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:45,393 INFO L93 Difference]: Finished difference Result 445 states and 558 transitions. [2022-11-19 07:02:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:02:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 73 [2022-11-19 07:02:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:45,395 INFO L225 Difference]: With dead ends: 445 [2022-11-19 07:02:45,396 INFO L226 Difference]: Without dead ends: 279 [2022-11-19 07:02:45,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 170 SyntacticMatches, 17 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=724, Invalid=6918, Unknown=14, NotChecked=0, Total=7656 [2022-11-19 07:02:45,398 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 295 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1115 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1234 Invalid, 0 Unknown, 337 Unchecked, 1.2s Time] [2022-11-19 07:02:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-19 07:02:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 238. [2022-11-19 07:02:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 160 states have (on average 1.11875) internal successors, (179), 167 states have internal predecessors, (179), 46 states have call successors, (46), 26 states have call predecessors, (46), 31 states have return successors, (55), 44 states have call predecessors, (55), 45 states have call successors, (55) [2022-11-19 07:02:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-11-19 07:02:45,535 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 73 [2022-11-19 07:02:45,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:45,536 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-11-19 07:02:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-19 07:02:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-11-19 07:02:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:02:45,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:45,538 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:45,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:02:45,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash -752805035, now seen corresponding path program 1 times [2022-11-19 07:02:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:45,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788152647] [2022-11-19 07:02:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:02:47,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788152647] [2022-11-19 07:02:47,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788152647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107669445] [2022-11-19 07:02:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:47,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:47,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:47,039 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:47,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:02:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 07:02:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:12,674 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:03:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:03:12,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:13,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:13,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-19 07:03:13,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:13,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-19 07:03:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:03:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107669445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888352060] [2022-11-19 07:03:13,779 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:03:13,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:13,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:13,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:13,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:13,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:13,849 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:03:13,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 07:03:13,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:13,920 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:03:13,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:03:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:03:14,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:03:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:03:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:03:14,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:03:14,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:03:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:03:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 07:03:23,393 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2022-11-19 07:03:23,601 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:03:24,291 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:03:24,329 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:03:24,346 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:03:24,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:43,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12230#(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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99| Int)) (and (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 16) 0) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 8) 0) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 24))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_99|))) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:03:43,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:03:43,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:03:43,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 37 [2022-11-19 07:03:43,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451093215] [2022-11-19 07:03:43,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:43,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:03:43,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:03:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=3767, Unknown=7, NotChecked=0, Total=4160 [2022-11-19 07:03:43,102 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-19 07:04:10,575 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:13,864 INFO L93 Difference]: Finished difference Result 351 states and 434 transitions. [2022-11-19 07:04:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:04:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) Word has length 75 [2022-11-19 07:04:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:13,866 INFO L225 Difference]: With dead ends: 351 [2022-11-19 07:04:13,866 INFO L226 Difference]: Without dead ends: 288 [2022-11-19 07:04:13,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 181 SyntacticMatches, 11 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=684, Invalid=7311, Unknown=15, NotChecked=0, Total=8010 [2022-11-19 07:04:13,868 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 190 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:13,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 999 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1357 Invalid, 0 Unknown, 217 Unchecked, 1.2s Time] [2022-11-19 07:04:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-19 07:04:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 226. [2022-11-19 07:04:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 152 states have (on average 1.111842105263158) internal successors, (169), 158 states have internal predecessors, (169), 44 states have call successors, (44), 26 states have call predecessors, (44), 29 states have return successors, (51), 41 states have call predecessors, (51), 43 states have call successors, (51) [2022-11-19 07:04:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 264 transitions. [2022-11-19 07:04:14,012 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 264 transitions. Word has length 75 [2022-11-19 07:04:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:14,013 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 264 transitions. [2022-11-19 07:04:14,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-19 07:04:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 264 transitions. [2022-11-19 07:04:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:04:14,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:14,015 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:14,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:04:14,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -79775404, now seen corresponding path program 1 times [2022-11-19 07:04:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:14,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518199764] [2022-11-19 07:04:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:04:14,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:14,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518199764] [2022-11-19 07:04:14,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518199764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:14,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:14,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:04:14,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123739085] [2022-11-19 07:04:14,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:04:14,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:14,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:04:14,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:04:14,532 INFO L87 Difference]: Start difference. First operand 226 states and 264 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:04:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:14,734 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2022-11-19 07:04:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:04:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-19 07:04:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:14,738 INFO L225 Difference]: With dead ends: 232 [2022-11-19 07:04:14,739 INFO L226 Difference]: Without dead ends: 230 [2022-11-19 07:04:14,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:14,740 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:14,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-19 07:04:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-11-19 07:04:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 161 states have internal predecessors, (172), 44 states have call successors, (44), 27 states have call predecessors, (44), 30 states have return successors, (51), 41 states have call predecessors, (51), 43 states have call successors, (51) [2022-11-19 07:04:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2022-11-19 07:04:14,862 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 76 [2022-11-19 07:04:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:14,863 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2022-11-19 07:04:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:04:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2022-11-19 07:04:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 07:04:14,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:14,865 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 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, 1, 1] [2022-11-19 07:04:14,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:04:14,865 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1751529687, now seen corresponding path program 1 times [2022-11-19 07:04:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:14,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498442965] [2022-11-19 07:04:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:04:15,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498442965] [2022-11-19 07:04:15,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498442965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:15,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:15,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:04:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226259974] [2022-11-19 07:04:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:15,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:04:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:04:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:04:15,321 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:04:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:15,644 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-11-19 07:04:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:04:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 82 [2022-11-19 07:04:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:15,646 INFO L225 Difference]: With dead ends: 236 [2022-11-19 07:04:15,646 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 07:04:15,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:04:15,647 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:15,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 07:04:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-11-19 07:04:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.1075949367088607) internal successors, (175), 164 states have internal predecessors, (175), 44 states have call successors, (44), 28 states have call predecessors, (44), 31 states have return successors, (51), 41 states have call predecessors, (51), 43 states have call successors, (51) [2022-11-19 07:04:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 270 transitions. [2022-11-19 07:04:15,800 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 270 transitions. Word has length 82 [2022-11-19 07:04:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:15,801 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 270 transitions. [2022-11-19 07:04:15,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:04:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 270 transitions. [2022-11-19 07:04:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:04:15,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:15,803 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:04:15,804 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -400229854, now seen corresponding path program 2 times [2022-11-19 07:04:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:15,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386865182] [2022-11-19 07:04:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 5 proven. 95 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:04:21,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386865182] [2022-11-19 07:04:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386865182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071525954] [2022-11-19 07:04:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:04:21,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:21,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:04:21,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:04:21,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-19 07:04:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:21,751 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 07:04:21,751 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 [2022-11-19 07:04:21,789 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 07:04:21,790 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 [2022-11-19 07:04:21,799 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 [2022-11-19 07:04:21,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 07:04:21,819 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 [2022-11-19 07:04:21,829 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 [2022-11-19 07:04:21,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2022-11-19 07:04:21,874 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 [2022-11-19 07:04:21,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-19 07:04:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:04:31,448 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 90 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:04:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:54,411 WARN L233 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 42 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:47,639 WARN L233 SmtUtils]: Spent 25.05s on a formula simplification. DAG size of input: 65 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 39 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:05:49,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071525954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77331779] [2022-11-19 07:05:49,438 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:05:49,438 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:49,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:49,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:49,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,584 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:05:49,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:05:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 07:05:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:05:49,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:05:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:05:49,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:05:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,119 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:05:50,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:05:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:05:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:05:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:05:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:05:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 07:05:50,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:50,974 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 07:05:50,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-19 07:05:51,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,510 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-19 07:05:51,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 680 treesize of output 689 [2022-11-19 07:05:51,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:51,597 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 07:05:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 686 treesize of output 639 [2022-11-19 07:05:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:51,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 660 treesize of output 639 [2022-11-19 07:05:51,883 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-19 07:05:51,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 647 treesize of output 658 [2022-11-19 07:05:52,188 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-19 07:05:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-11-19 07:06:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:06:02,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:06:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:06:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:06:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 07:06:02,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:06:02,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:06:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:06:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:06:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:06:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:02,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:06:04,186 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-19 07:06:04,238 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-19 07:06:04,917 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-19 07:06:04,958 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:06:04,974 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:06:05,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:06:26,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15138#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 16)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_247|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_245| 24)) 0))) (<= |~#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) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-19 07:06:26,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:06:26,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:26,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 22] total 73 [2022-11-19 07:06:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618743324] [2022-11-19 07:06:26,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:26,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-19 07:06:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-19 07:06:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=9552, Unknown=9, NotChecked=0, Total=10100 [2022-11-19 07:06:26,629 INFO L87 Difference]: Start difference. First operand 234 states and 270 transitions. Second operand has 73 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 63 states have internal predecessors, (140), 29 states have call successors, (38), 5 states have call predecessors, (38), 17 states have return successors, (37), 26 states have call predecessors, (37), 28 states have call successors, (37) [2022-11-19 07:07:16,053 WARN L233 SmtUtils]: Spent 22.61s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:30,769 WARN L233 SmtUtils]: Spent 14.47s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:13,116 WARN L233 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:20,673 INFO L93 Difference]: Finished difference Result 519 states and 651 transitions. [2022-11-19 07:08:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-19 07:08:20,674 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 63 states have internal predecessors, (140), 29 states have call successors, (38), 5 states have call predecessors, (38), 17 states have return successors, (37), 26 states have call predecessors, (37), 28 states have call successors, (37) Word has length 86 [2022-11-19 07:08:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:20,677 INFO L225 Difference]: With dead ends: 519 [2022-11-19 07:08:20,677 INFO L226 Difference]: Without dead ends: 460 [2022-11-19 07:08:20,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5900 ImplicationChecksByTransitivity, 208.3s TimeCoverageRelationStatistics Valid=961, Invalid=17913, Unknown=32, NotChecked=0, Total=18906 [2022-11-19 07:08:20,680 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 75 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:20,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1619 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1442 Invalid, 0 Unknown, 785 Unchecked, 3.4s Time] [2022-11-19 07:08:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-19 07:08:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 340. [2022-11-19 07:08:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 231 states have (on average 1.147186147186147) internal successors, (265), 242 states have internal predecessors, (265), 61 states have call successors, (61), 40 states have call predecessors, (61), 47 states have return successors, (80), 57 states have call predecessors, (80), 60 states have call successors, (80) [2022-11-19 07:08:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 406 transitions. [2022-11-19 07:08:20,868 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 406 transitions. Word has length 86 [2022-11-19 07:08:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:20,869 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 406 transitions. [2022-11-19 07:08:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 63 states have internal predecessors, (140), 29 states have call successors, (38), 5 states have call predecessors, (38), 17 states have return successors, (37), 26 states have call predecessors, (37), 28 states have call successors, (37) [2022-11-19 07:08:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 406 transitions. [2022-11-19 07:08:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:08:20,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:20,871 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:20,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:21,078 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1526323144, now seen corresponding path program 1 times [2022-11-19 07:08:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:08:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937126617] [2022-11-19 07:08:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:08:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:08:22,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:08:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937126617] [2022-11-19 07:08:22,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937126617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:08:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224673052] [2022-11-19 07:08:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:22,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:22,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:22,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:22,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:08:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-19 07:08:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 53 proven. 73 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:08:24,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:25,799 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 35 treesize of output 27 [2022-11-19 07:08:25,821 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-19 07:08:25,821 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-19 07:08:26,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:08:26,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:08:26,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:08:26,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 85 [2022-11-19 07:08:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 29 proven. 75 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:08:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224673052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351271955] [2022-11-19 07:08:26,858 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:08:26,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:08:26,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:08:26,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:08:26,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:08:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,009 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:08:27,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:08:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 07:08:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:08:27,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:08:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:08:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:08:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:08:27,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:08:27,411 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:08:27,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:08:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:08:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:08:27,555 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:08:27,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:08:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,702 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:08:27,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-19 07:08:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,875 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:08:27,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:08:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:27,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:08:27,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:08:27,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:08:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:08:28,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:08:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:08:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,064 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 71 treesize of output 19 [2022-11-19 07:08:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:08:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:08:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:08:28,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:08:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:08:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 07:08:28,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:08:28,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:08:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:08:28,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:08:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:08:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:08:28,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:08:29,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-19 07:08:29,623 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-11-19 07:08:30,856 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-19 07:08:30,860 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:08:30,877 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:08:30,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:08:46,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17060#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (<= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:08:46,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:08:46,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:08:46,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 42 [2022-11-19 07:08:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089817633] [2022-11-19 07:08:46,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:46,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:08:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:08:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:08:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:08:46,729 INFO L87 Difference]: Start difference. First operand 340 states and 406 transitions. Second operand has 42 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 40 states have internal predecessors, (117), 22 states have call successors, (31), 3 states have call predecessors, (31), 7 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2022-11-19 07:08:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:51,089 INFO L93 Difference]: Finished difference Result 682 states and 880 transitions. [2022-11-19 07:08:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:08:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 40 states have internal predecessors, (117), 22 states have call successors, (31), 3 states have call predecessors, (31), 7 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) Word has length 88 [2022-11-19 07:08:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:51,095 INFO L225 Difference]: With dead ends: 682 [2022-11-19 07:08:51,095 INFO L226 Difference]: Without dead ends: 622 [2022-11-19 07:08:51,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 200 SyntacticMatches, 22 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=468, Invalid=6504, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 07:08:51,097 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 147 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:51,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1502 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1473 Invalid, 0 Unknown, 493 Unchecked, 2.8s Time] [2022-11-19 07:08:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-19 07:08:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 450. [2022-11-19 07:08:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 310 states have (on average 1.1709677419354838) internal successors, (363), 327 states have internal predecessors, (363), 77 states have call successors, (77), 49 states have call predecessors, (77), 62 states have return successors, (101), 73 states have call predecessors, (101), 76 states have call successors, (101) [2022-11-19 07:08:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 541 transitions. [2022-11-19 07:08:51,345 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 541 transitions. Word has length 88 [2022-11-19 07:08:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:51,345 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 541 transitions. [2022-11-19 07:08:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 40 states have internal predecessors, (117), 22 states have call successors, (31), 3 states have call predecessors, (31), 7 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2022-11-19 07:08:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 541 transitions. [2022-11-19 07:08:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 07:08:51,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:51,348 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:51,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:51,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1301776703, now seen corresponding path program 3 times [2022-11-19 07:08:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:08:51,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783088640] [2022-11-19 07:08:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:08:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 35 proven. 86 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 07:08:55,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:08:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783088640] [2022-11-19 07:08:55,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783088640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:08:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878657605] [2022-11-19 07:08:55,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:08:55,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:55,522 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:55,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4956ef68-57f9-470d-8243-147203a417af/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:08:55,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:08:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:08:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-19 07:08:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:56,123 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:08:56,123 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 [2022-11-19 07:08:56,155 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:08:56,156 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 [2022-11-19 07:09:25,043 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:09:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 81 proven. 75 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:09:49,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 39 proven. 83 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:09:51,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878657605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:51,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197464390] [2022-11-19 07:09:51,854 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:09:51,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:09:51,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:09:51,854 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:09:51,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:09:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:51,955 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:09:51,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-19 07:09:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,054 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:09:52,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-19 07:09:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:09:52,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:09:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:09:52,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:09:52,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:09:52,440 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:09:52,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:09:52,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:09:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:09:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:09:52,555 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:09:52,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:09:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,700 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:09:52,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-19 07:09:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,887 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:09:52,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:09:52,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:52,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:09:52,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:09:52,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:09:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:09:53,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:09:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:09:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:09:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:09:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:09:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:09:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:09:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:53,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:09:54,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-19 07:09:54,484 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-11-19 07:09:55,655 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:09:55,701 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:09:55,718 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:09:55,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:10:11,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19359#(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 [2022-11-19 07:10:11,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:10:11,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:10:11,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16] total 47 [2022-11-19 07:10:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4585176] [2022-11-19 07:10:11,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:10:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 07:10:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:10:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 07:10:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=5209, Unknown=8, NotChecked=0, Total=5550 [2022-11-19 07:10:11,213 INFO L87 Difference]: Start difference. First operand 450 states and 541 transitions. Second operand has 47 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 43 states have internal predecessors, (125), 26 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38)