./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:47:25,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:47:25,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:47:25,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:47:25,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:47:25,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:47:25,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:47:25,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:47:25,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:47:25,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:47:25,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:47:25,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:47:25,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:47:25,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:47:25,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:47:25,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:47:25,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:47:25,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:47:25,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:47:25,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:47:25,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:47:25,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:47:25,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:47:25,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:47:25,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:47:25,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:47:25,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:47:25,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:47:25,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:47:25,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:47:25,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:47:25,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:47:25,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:47:25,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:47:25,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:47:25,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:47:25,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:47:25,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:47:25,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:47:25,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:47:25,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:47:25,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:47:25,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:47:25,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:47:25,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:47:25,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:47:25,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:47:25,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:47:25,881 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:47:25,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:47:25,881 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:47:25,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:47:25,881 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:47:25,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:47:25,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:47:25,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:47:25,882 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:47:25,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:47:25,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:47:25,883 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:47:25,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:47:25,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:47:25,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:47:25,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:47:25,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:47:25,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:47:25,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:47:25,885 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:47:25,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:47:25,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:47:25,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:47:25,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:25,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:47:25,886 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:47:25,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:47:25,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:47:25,887 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:47:25,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:47:25,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:47:25,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:47:25,887 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_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2022-11-03 01:47:26,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:47:26,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:47:26,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:47:26,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:47:26,213 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:47:26,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-03 01:47:26,295 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/data/81daeb774/8b9f1db84ff64f2ea319c6b56af0d3f5/FLAGea2400e2e [2022-11-03 01:47:27,224 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:47:27,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-03 01:47:27,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/data/81daeb774/8b9f1db84ff64f2ea319c6b56af0d3f5/FLAGea2400e2e [2022-11-03 01:47:27,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/data/81daeb774/8b9f1db84ff64f2ea319c6b56af0d3f5 [2022-11-03 01:47:27,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:47:27,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:47:27,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:27,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:47:27,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:47:27,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:27" (1/1) ... [2022-11-03 01:47:27,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6812858c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:27, skipping insertion in model container [2022-11-03 01:47:27,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:27" (1/1) ... [2022-11-03 01:47:27,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:47:27,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:47:28,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-03 01:47:28,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-03 01:47:29,308 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,309 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,309 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,310 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,312 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,327 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,328 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,330 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,331 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,333 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,335 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,336 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,336 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:29,743 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 01:47:29,745 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 01:47:29,746 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 01:47:29,749 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 01:47:29,753 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 01:47:29,755 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 01:47:29,756 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 01:47:29,757 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 01:47:29,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 01:47:29,769 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 01:47:29,990 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 01:47:30,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:30,076 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:47:30,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-03 01:47:30,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-03 01:47:30,196 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,197 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,197 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,198 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,199 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,207 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,208 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,209 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,210 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,211 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,212 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,212 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,213 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:47:30,253 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 01:47:30,255 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 01:47:30,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 01:47:30,257 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 01:47:30,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 01:47:30,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 01:47:30,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 01:47:30,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 01:47:30,261 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 01:47:30,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 01:47:30,289 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 01:47:30,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:30,493 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:47:30,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30 WrapperNode [2022-11-03 01:47:30,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:30,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:30,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:47:30,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:47:30,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,660 INFO L138 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-11-03 01:47:30,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:30,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:47:30,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:47:30,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:47:30,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:47:30,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:47:30,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:47:30,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:47:30,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (1/1) ... [2022-11-03 01:47:30,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:30,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:47:30,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:47:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:47:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:47:30,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:47:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 01:47:30,867 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 01:47:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:47:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 01:47:30,868 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 01:47:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:47:30,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:47:30,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:47:30,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:47:30,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:47:30,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:47:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:47:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:47:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:47:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 01:47:30,870 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 01:47:30,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:47:31,176 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:47:31,178 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:47:31,584 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:47:31,781 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:47:31,781 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:47:31,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:31 BoogieIcfgContainer [2022-11-03 01:47:31,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:47:31,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:47:31,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:47:31,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:47:31,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:47:27" (1/3) ... [2022-11-03 01:47:31,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1f3cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:31, skipping insertion in model container [2022-11-03 01:47:31,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:30" (2/3) ... [2022-11-03 01:47:31,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1f3cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:31, skipping insertion in model container [2022-11-03 01:47:31,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:31" (3/3) ... [2022-11-03 01:47:31,797 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2022-11-03 01:47:31,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:47:31,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:47:31,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:47:31,894 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;@5e0cdacc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:47:31,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:47:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 01:47:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:47:31,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:31,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:31,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2063254078, now seen corresponding path program 1 times [2022-11-03 01:47:31,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:31,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108201548] [2022-11-03 01:47:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:32,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108201548] [2022-11-03 01:47:32,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108201548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824325185] [2022-11-03 01:47:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:32,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:32,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:32,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:47:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 01:47:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:33,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 01:47:33,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 01:47:33,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-03 01:47:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:33,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-03 01:47:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:47:35,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:35,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824325185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:35,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:47:35,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 01:47:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657595522] [2022-11-03 01:47:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:47:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:47:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:47:35,560 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:47:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:36,059 INFO L93 Difference]: Finished difference Result 119 states and 174 transitions. [2022-11-03 01:47:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:47:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-03 01:47:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:36,083 INFO L225 Difference]: With dead ends: 119 [2022-11-03 01:47:36,083 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 01:47:36,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:47:36,098 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:36,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 219 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-11-03 01:47:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 01:47:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2022-11-03 01:47:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-03 01:47:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-11-03 01:47:36,159 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 37 [2022-11-03 01:47:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:36,160 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-11-03 01:47:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:47:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-11-03 01:47:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 01:47:36,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:36,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:36,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:36,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:47:36,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1943617686, now seen corresponding path program 1 times [2022-11-03 01:47:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390633857] [2022-11-03 01:47:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:47:36,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:36,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390633857] [2022-11-03 01:47:36,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390633857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042772437] [2022-11-03 01:47:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:36,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:36,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:47:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 01:47:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:37,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 01:47:37,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 01:47:37,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:47:37,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 01:47:37,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:47:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:47:37,354 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:47:37,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_63| input size 65 context size 65 output size 65 [2022-11-03 01:47:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466314857] [2022-11-03 01:47:37,378 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 01:47:37,378 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:37,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:37,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:37,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,533 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:47:37,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:47:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:37,646 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:47:37,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:47:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:47:38,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:47:38,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:47:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:47:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:47:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:47:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:38,322 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:47:38,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:47:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,459 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:47:38,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 01:47:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:38,551 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:47:38,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:47:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,696 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:47:38,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 01:47:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:47:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 01:47:38,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:47:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 01:47:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:38,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:47:38,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:47:38,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:47:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:39,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 01:47:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:39,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:47:39,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:39,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:47:39,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:39,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:47:39,832 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 01:47:40,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2022-11-03 01:47:40,151 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:47:40,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:47:43,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1466314857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:43,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:47:43,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2022-11-03 01:47:43,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146702700] [2022-11-03 01:47:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:47:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:47:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:47:43,337 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:47:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:43,943 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-11-03 01:47:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:47:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-03 01:47:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:43,946 INFO L225 Difference]: With dead ends: 100 [2022-11-03 01:47:43,946 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 01:47:43,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:47:43,948 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:43,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 211 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-03 01:47:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 01:47:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-11-03 01:47:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 01:47:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-11-03 01:47:43,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2022-11-03 01:47:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-11-03 01:47:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:47:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-11-03 01:47:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:47:43,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:43,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:44,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:44,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1859140634, now seen corresponding path program 1 times [2022-11-03 01:47:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610768639] [2022-11-03 01:47:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:44,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610768639] [2022-11-03 01:47:44,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610768639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8514621] [2022-11-03 01:47:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:44,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:44,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:47:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:47:44,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:47:44,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8514621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:47:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 01:47:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730948139] [2022-11-03 01:47:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:47:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:47:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:47:44,603 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:44,797 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2022-11-03 01:47:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:47:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-03 01:47:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:44,799 INFO L225 Difference]: With dead ends: 88 [2022-11-03 01:47:44,799 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 01:47:44,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:47:44,800 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:44,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 149 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 01:47:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 01:47:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 01:47:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-03 01:47:44,829 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2022-11-03 01:47:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:44,829 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-03 01:47:44,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-03 01:47:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:47:44,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:44,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:44,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:45,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2129804384, now seen corresponding path program 1 times [2022-11-03 01:47:45,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:45,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102539784] [2022-11-03 01:47:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:45,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102539784] [2022-11-03 01:47:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102539784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970405454] [2022-11-03 01:47:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:45,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:47:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:47:45,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:45,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970405454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:45,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:47:45,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 01:47:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584327245] [2022-11-03 01:47:45,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:45,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:47:45,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:47:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:47:45,623 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:45,891 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2022-11-03 01:47:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:47:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-03 01:47:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:45,893 INFO L225 Difference]: With dead ends: 105 [2022-11-03 01:47:45,893 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 01:47:45,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:47:45,895 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:45,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 175 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 01:47:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-03 01:47:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 01:47:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 01:47:45,935 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2022-11-03 01:47:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:45,935 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 01:47:45,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 01:47:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:47:45,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:45,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:45,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:46,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:46,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash -647115340, now seen corresponding path program 1 times [2022-11-03 01:47:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798071623] [2022-11-03 01:47:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:46,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:46,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798071623] [2022-11-03 01:47:46,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798071623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043842985] [2022-11-03 01:47:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:46,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:46,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:46,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:47:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:46,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:46,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043842985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:46,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:47:46,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 01:47:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592051777] [2022-11-03 01:47:46,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:46,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:47:46,632 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:46,715 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-11-03 01:47:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-03 01:47:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:46,717 INFO L225 Difference]: With dead ends: 106 [2022-11-03 01:47:46,718 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 01:47:46,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:47:46,720 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:46,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 01:47:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-03 01:47:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 01:47:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-11-03 01:47:46,736 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2022-11-03 01:47:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:46,736 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-11-03 01:47:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:47:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-11-03 01:47:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:47:46,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:46,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:46,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:46,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:46,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 625474841, now seen corresponding path program 1 times [2022-11-03 01:47:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:46,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410025631] [2022-11-03 01:47:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:47,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:47,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410025631] [2022-11-03 01:47:47,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410025631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:47,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234055174] [2022-11-03 01:47:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:47,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:47,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:47,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:47:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 01:47:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:47,562 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 01:47:47,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 01:47:47,586 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:47:47,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 01:47:47,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 01:47:47,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 01:47:47,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-11-03 01:47:47,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 01:48:13,604 WARN L234 SmtUtils]: Spent 21.51s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:48:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:16,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:16,701 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-03 01:48:16,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 77 case distinctions, treesize of input 209 treesize of output 143 [2022-11-03 01:48:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:16,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:16,730 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-03 01:48:16,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 140 treesize of output 86 [2022-11-03 01:48:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:16,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:48:21,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234055174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629699053] [2022-11-03 01:48:21,208 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 01:48:21,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:48:21,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:48:21,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:48:21,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:48:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,318 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:48:21,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:48:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 01:48:21,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:48:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:48:21,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:48:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:48:21,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:48:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:48:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:48:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:21,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:48:22,699 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 131 for LOIs [2022-11-03 01:48:23,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2022-11-03 01:48:23,407 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:48:23,432 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 01:48:23,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:48:31,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [629699053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:31,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:48:31,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-03 01:48:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155094767] [2022-11-03 01:48:31,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:31,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:48:31,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:48:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1522, Unknown=1, NotChecked=0, Total=1722 [2022-11-03 01:48:31,321 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:48:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:34,042 INFO L93 Difference]: Finished difference Result 129 states and 176 transitions. [2022-11-03 01:48:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:48:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-03 01:48:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:34,045 INFO L225 Difference]: With dead ends: 129 [2022-11-03 01:48:34,045 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 01:48:34,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=246, Invalid=1733, Unknown=1, NotChecked=0, Total=1980 [2022-11-03 01:48:34,048 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 17 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 302 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 95 Unchecked, 0.9s Time] [2022-11-03 01:48:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 01:48:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2022-11-03 01:48:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-03 01:48:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-11-03 01:48:34,085 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 45 [2022-11-03 01:48:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:34,085 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-11-03 01:48:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:48:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-11-03 01:48:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:48:34,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:34,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:34,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:34,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 105816945, now seen corresponding path program 1 times [2022-11-03 01:48:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492459492] [2022-11-03 01:48:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:34,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492459492] [2022-11-03 01:48:34,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492459492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066109357] [2022-11-03 01:48:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:34,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:34,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:34,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:48:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 01:48:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:34,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 01:48:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:34,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:48:35,057 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:48:35,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_76| input size 53 context size 53 output size 53 [2022-11-03 01:48:35,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179553557] [2022-11-03 01:48:35,061 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 01:48:35,061 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:48:35,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:48:35,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:48:35,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:48:35,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,144 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:48:35,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:48:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,231 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:48:35,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:48:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:48:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:48:35,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:48:35,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:48:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:48:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:35,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:35,749 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:48:35,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:48:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,866 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:48:35,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 01:48:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:35,940 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:48:35,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:48:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,078 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:48:36,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 01:48:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:48:36,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:48:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:48:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 01:48:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:48:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:48:36,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:48:36,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:48:36,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:48:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:48:36,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:48:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 01:48:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:48:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:48:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:48:36,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:48:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:48:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:36,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 01:48:37,276 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 01:48:37,709 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 01:48:37,784 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:48:37,804 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 01:48:37,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:48:42,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1179553557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:42,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:42,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 24 [2022-11-03 01:48:42,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817704220] [2022-11-03 01:48:42,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:42,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:48:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:48:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:48:42,682 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:48:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:43,335 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2022-11-03 01:48:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:48:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-03 01:48:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:43,337 INFO L225 Difference]: With dead ends: 122 [2022-11-03 01:48:43,337 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 01:48:43,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:48:43,339 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:43,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 166 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 238 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-11-03 01:48:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 01:48:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-11-03 01:48:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-03 01:48:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-03 01:48:43,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 46 [2022-11-03 01:48:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:43,388 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-03 01:48:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:48:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-03 01:48:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:48:43,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:43,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:43,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:43,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 848277815, now seen corresponding path program 1 times [2022-11-03 01:48:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586737808] [2022-11-03 01:48:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:44,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586737808] [2022-11-03 01:48:44,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586737808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526558587] [2022-11-03 01:48:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:44,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:44,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:44,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:48:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 01:48:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:56,495 WARN L234 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:48:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:48:57,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:59,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526558587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:59,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184398612] [2022-11-03 01:48:59,704 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:48:59,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:48:59,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:48:59,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:48:59,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:48:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:59,810 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:48:59,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:48:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:59,918 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:48:59,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:49:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:49:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:00,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:49:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:00,375 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:49:00,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:49:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,478 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:49:00,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 01:49:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:00,547 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:49:00,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:49:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:49:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,718 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:49:00,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 01:49:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:49:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 01:49:00,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 01:49:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:00,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 01:49:00,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:49:00,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:49:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 01:49:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:49:02,076 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 01:49:02,979 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 01:49:03,023 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:49:03,052 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:49:03,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [184398612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:24,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-03 01:49:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628902308] [2022-11-03 01:49:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:24,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:49:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:49:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1180, Unknown=10, NotChecked=0, Total=1332 [2022-11-03 01:49:24,769 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:49:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:28,178 INFO L93 Difference]: Finished difference Result 135 states and 171 transitions. [2022-11-03 01:49:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:49:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-03 01:49:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:28,180 INFO L225 Difference]: With dead ends: 135 [2022-11-03 01:49:28,180 INFO L226 Difference]: Without dead ends: 82 [2022-11-03 01:49:28,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=165, Invalid=1384, Unknown=11, NotChecked=0, Total=1560 [2022-11-03 01:49:28,182 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:28,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 189 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 296 Invalid, 0 Unknown, 271 Unchecked, 0.7s Time] [2022-11-03 01:49:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-03 01:49:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-11-03 01:49:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 51 states have internal predecessors, (61), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (17), 14 states have call predecessors, (17), 15 states have call successors, (17) [2022-11-03 01:49:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2022-11-03 01:49:28,212 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 48 [2022-11-03 01:49:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:28,213 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2022-11-03 01:49:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:49:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2022-11-03 01:49:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:49:28,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:28,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:28,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:28,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1479119613, now seen corresponding path program 1 times [2022-11-03 01:49:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:28,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157829163] [2022-11-03 01:49:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:49:28,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157829163] [2022-11-03 01:49:28,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157829163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342958848] [2022-11-03 01:49:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:28,709 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:28,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:49:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 01:49:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:29,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 01:49:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:29,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:49:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:29,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-03 01:49:29,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:29,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 01:49:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:49:29,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:29,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_882 Int) (v_ArrVal_883 (Array Int Int)) (v_ArrVal_884 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_883) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_884) |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_882)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)))) is different from false [2022-11-03 01:49:29,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:49:29,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:49:29,775 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:49:29,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:49:29,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-11-03 01:49:29,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-11-03 01:49:29,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 01:49:29,920 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-11-03 01:49:29,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:49:29,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 93 [2022-11-03 01:49:29,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 6 [2022-11-03 01:49:30,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 01:49:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-03 01:49:30,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342958848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:30,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1416461004] [2022-11-03 01:49:30,176 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:49:30,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:30,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:30,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:30,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,275 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:49:30,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:49:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 01:49:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:30,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:49:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:30,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:49:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:30,759 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:49:30,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:49:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,896 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:49:30,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 01:49:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:49:30,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:30,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:49:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 01:49:31,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:49:31,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:49:31,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:49:31,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 01:49:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 01:49:31,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 01:49:31,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:49:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 01:49:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 01:49:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:49:31,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:49:31,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:49:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 01:49:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:31,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:49:33,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 01:49:33,171 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:49:33,929 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:49:33,931 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:49:33,952 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:49:34,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:41,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3679#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24)) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_75|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75| 24))) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_75|)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:49:41,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:49:41,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:41,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2022-11-03 01:49:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193729874] [2022-11-03 01:49:41,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:41,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:49:41,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:49:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2253, Unknown=1, NotChecked=96, Total=2550 [2022-11-03 01:49:41,412 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-03 01:49:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:42,879 INFO L93 Difference]: Finished difference Result 186 states and 263 transitions. [2022-11-03 01:49:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:49:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2022-11-03 01:49:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:42,882 INFO L225 Difference]: With dead ends: 186 [2022-11-03 01:49:42,882 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 01:49:42,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=286, Invalid=3257, Unknown=1, NotChecked=116, Total=3660 [2022-11-03 01:49:42,884 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:42,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 626 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 705 Invalid, 0 Unknown, 504 Unchecked, 0.9s Time] [2022-11-03 01:49:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 01:49:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2022-11-03 01:49:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 78 states have internal predecessors, (90), 27 states have call successors, (27), 11 states have call predecessors, (27), 14 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-03 01:49:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 156 transitions. [2022-11-03 01:49:42,946 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 156 transitions. Word has length 49 [2022-11-03 01:49:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:42,946 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 156 transitions. [2022-11-03 01:49:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-03 01:49:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 156 transitions. [2022-11-03 01:49:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:49:42,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:42,948 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:42,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:43,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 01:49:43,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash 376968697, now seen corresponding path program 1 times [2022-11-03 01:49:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:43,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744291485] [2022-11-03 01:49:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:43,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:49:43,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744291485] [2022-11-03 01:49:43,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744291485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438097256] [2022-11-03 01:49:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:43,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:43,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:43,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:49:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:49:43,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:43,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438097256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:43,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:43,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-11-03 01:49:43,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992917543] [2022-11-03 01:49:43,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:43,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:49:43,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:49:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:49:43,884 INFO L87 Difference]: Start difference. First operand 115 states and 156 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:49:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:44,141 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2022-11-03 01:49:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-11-03 01:49:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:44,144 INFO L225 Difference]: With dead ends: 176 [2022-11-03 01:49:44,144 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 01:49:44,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:49:44,146 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:44,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 166 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 01:49:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-03 01:49:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 27 states have call successors, (27), 11 states have call predecessors, (27), 14 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-03 01:49:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2022-11-03 01:49:44,205 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 50 [2022-11-03 01:49:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:44,205 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2022-11-03 01:49:44,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:49:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2022-11-03 01:49:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:49:44,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:44,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:44,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:44,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1257865549, now seen corresponding path program 1 times [2022-11-03 01:49:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59176267] [2022-11-03 01:49:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:49:44,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59176267] [2022-11-03 01:49:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59176267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569555932] [2022-11-03 01:49:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:44,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:44,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:44,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:49:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:49:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:49:45,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:45,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569555932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:45,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:45,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-03 01:49:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898512475] [2022-11-03 01:49:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:49:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:49:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:49:45,199 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:49:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:45,483 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-11-03 01:49:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:49:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-03 01:49:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:45,485 INFO L225 Difference]: With dead ends: 183 [2022-11-03 01:49:45,486 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 01:49:45,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:49:45,487 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:45,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 01:49:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2022-11-03 01:49:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.2) internal successors, (84), 74 states have internal predecessors, (84), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (35), 25 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-03 01:49:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2022-11-03 01:49:45,535 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 52 [2022-11-03 01:49:45,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:45,535 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2022-11-03 01:49:45,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:49:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2022-11-03 01:49:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:49:45,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:45,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:45,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:45,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash 475793178, now seen corresponding path program 1 times [2022-11-03 01:49:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:45,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016392905] [2022-11-03 01:49:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:49:45,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016392905] [2022-11-03 01:49:45,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016392905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:45,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044701383] [2022-11-03 01:49:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:45,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:45,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:45,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:49:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:49:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:49:46,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:49:46,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044701383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836144102] [2022-11-03 01:49:46,601 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:49:46,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:46,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:46,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:46,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:46,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:46,694 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:49:46,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:49:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:46,794 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:49:46,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:49:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:49:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:47,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:49:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:49:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:49:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:49:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:49:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:47,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:49:48,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 134 for LOIs [2022-11-03 01:49:48,949 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:49:49,759 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:49:49,760 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:49:49,778 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:49:49,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:01,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5734#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 16) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 1) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 8) 0) (not (= 5 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 0)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 8) 0) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 32) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|)) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|) 24) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_22|))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:01,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:01,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:01,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-03 01:50:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642861752] [2022-11-03 01:50:01,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:50:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:50:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 01:50:01,167 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 01:50:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:01,588 INFO L93 Difference]: Finished difference Result 181 states and 251 transitions. [2022-11-03 01:50:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:50:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 56 [2022-11-03 01:50:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:01,591 INFO L225 Difference]: With dead ends: 181 [2022-11-03 01:50:01,591 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 01:50:01,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 01:50:01,593 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:01,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 586 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:50:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 01:50:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2022-11-03 01:50:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 75 states have internal predecessors, (85), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (35), 25 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-03 01:50:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-11-03 01:50:01,646 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 56 [2022-11-03 01:50:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:01,647 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-11-03 01:50:01,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 01:50:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-11-03 01:50:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 01:50:01,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:01,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:01,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:50:01,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash -776819820, now seen corresponding path program 2 times [2022-11-03 01:50:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:01,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46195480] [2022-11-03 01:50:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:50:02,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46195480] [2022-11-03 01:50:02,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46195480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892922008] [2022-11-03 01:50:02,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:50:02,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:02,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:02,557 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:02,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:50:02,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:50:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:50:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:02,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892922008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:02,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:50:02,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2022-11-03 01:50:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512877232] [2022-11-03 01:50:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:02,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:50:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:50:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:50:02,934 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 01:50:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:03,142 INFO L93 Difference]: Finished difference Result 177 states and 243 transitions. [2022-11-03 01:50:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:50:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-11-03 01:50:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:03,144 INFO L225 Difference]: With dead ends: 177 [2022-11-03 01:50:03,144 INFO L226 Difference]: Without dead ends: 124 [2022-11-03 01:50:03,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:50:03,146 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:03,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 257 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-03 01:50:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2022-11-03 01:50:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 76 states have internal predecessors, (86), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (35), 25 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-03 01:50:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2022-11-03 01:50:03,196 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 58 [2022-11-03 01:50:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:03,196 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2022-11-03 01:50:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 01:50:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2022-11-03 01:50:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 01:50:03,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:03,198 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:03,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:03,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:03,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -159249322, now seen corresponding path program 1 times [2022-11-03 01:50:03,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:03,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676673956] [2022-11-03 01:50:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:03,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:50:07,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676673956] [2022-11-03 01:50:07,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676673956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393143463] [2022-11-03 01:50:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:07,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:07,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:07,093 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:07,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:50:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 01:50:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:07,552 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 01:50:07,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 01:50:07,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 01:50:07,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 01:50:07,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:50:07,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:50:25,584 WARN L234 SmtUtils]: Spent 16.08s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:50:29,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:50:34,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393143463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:34,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597644319] [2022-11-03 01:50:34,080 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:50:34,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:34,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:34,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:34,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,154 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:50:34,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:50:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,251 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:50:34,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:50:34,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:50:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:50:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:50:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:50:34,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:50:34,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:50:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:50:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:34,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:50:36,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 134 for LOIs [2022-11-03 01:50:36,283 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 01:50:36,906 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:50:36,908 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:50:36,930 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:50:36,998 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:49,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7211#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| 3)) (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 8) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| 4)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| 0)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27| 5)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|) 24) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_27|)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:49,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:49,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:49,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 11] total 39 [2022-11-03 01:50:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961489407] [2022-11-03 01:50:49,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:49,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 01:50:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 01:50:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=3852, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 01:50:49,771 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 39 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 16 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-03 01:50:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:59,913 INFO L93 Difference]: Finished difference Result 298 states and 438 transitions. [2022-11-03 01:50:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 01:50:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 16 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) Word has length 59 [2022-11-03 01:50:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:59,917 INFO L225 Difference]: With dead ends: 298 [2022-11-03 01:50:59,917 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 01:50:59,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 129 SyntacticMatches, 13 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=841, Invalid=8470, Unknown=1, NotChecked=0, Total=9312 [2022-11-03 01:50:59,922 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 100 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:59,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1010 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2468 Invalid, 0 Unknown, 348 Unchecked, 3.5s Time] [2022-11-03 01:50:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 01:51:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2022-11-03 01:51:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 131 states have internal predecessors, (143), 54 states have call successors, (54), 14 states have call predecessors, (54), 22 states have return successors, (94), 52 states have call predecessors, (94), 53 states have call successors, (94) [2022-11-03 01:51:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 291 transitions. [2022-11-03 01:51:00,061 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 291 transitions. Word has length 59 [2022-11-03 01:51:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:00,062 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 291 transitions. [2022-11-03 01:51:00,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 16 states have call successors, (27), 5 states have call predecessors, (27), 9 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-03 01:51:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 291 transitions. [2022-11-03 01:51:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:51:00,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:00,069 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:00,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:51:00,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1822501617, now seen corresponding path program 1 times [2022-11-03 01:51:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329024510] [2022-11-03 01:51:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:51:02,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:02,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329024510] [2022-11-03 01:51:02,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329024510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:02,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762321617] [2022-11-03 01:51:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:02,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:02,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:02,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:51:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-03 01:51:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:06,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:13,421 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse1 (+ 8 .cse12))) (or (not (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))) (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse4 (+ .cse2 8))) (or (= .cse2 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (let ((.cse5 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse7 (+ .cse5 8))) (or (= .cse5 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse6) .cse7) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse9 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|) 8))) (or (= 0 .cse8) (not (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse11 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|) 8))) (or (= 0 .cse10) (not (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))))) (and (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|) (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and (= .cse12 0) (= .cse0 0)) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |c_aws_linked_list_node_next_is_valid_#in~node.base|))))) is different from false [2022-11-03 01:51:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 1 not checked. [2022-11-03 01:51:29,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762321617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077113636] [2022-11-03 01:51:29,918 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:51:29,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:29,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:29,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:29,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,094 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:51:30,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:51:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,295 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:51:30,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:51:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:51:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:51:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:51:30,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:51:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:51:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:51:30,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:51:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:30,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:51:40,791 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-03 01:51:41,089 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 01:51:41,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 01:51:41,755 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:51:41,774 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:51:41,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:21,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8509#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129| Int)) (and (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 16) 0) (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129| 4)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 24)) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 24)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|)) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 24)) 0) 16) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_129|) 8) 0))) (= (select (select |#memory_int| 1) 0) 48) (= 33 (select |#length| 2)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:21,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:21,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:21,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 15] total 55 [2022-11-03 01:52:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748033597] [2022-11-03 01:52:21,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 01:52:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 01:52:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=6174, Unknown=1, NotChecked=160, Total=6806 [2022-11-03 01:52:21,550 INFO L87 Difference]: Start difference. First operand 198 states and 291 transitions. Second operand has 55 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 01:52:26,543 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse20 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse19 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse21 (+ 8 .cse20))) (let ((.cse6 (= (select (select |c_#memory_$Pointer$.base| .cse19) .cse21) |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse4 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse19) .cse21)))) (let ((.cse1 (not .cse4)) (.cse0 (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse7 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (.cse8 (mod |c_aws_linked_list_node_next_is_valid_#res| 256)) (.cse3 (= .cse20 0)) (.cse5 (= .cse19 0)) (.cse2 (not .cse6))) (and (or .cse0 (and (or .cse1 (<= 1 |c_aws_linked_list_node_next_is_valid_#res|) .cse2) (<= |c_aws_linked_list_node_next_is_valid_#res| 1)) .cse3) (or (and .cse4 (or (not .cse3) (not .cse5)) .cse6 (or (not .cse7) (not .cse0))) (= .cse8 0)) (or .cse1 (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse11 (+ .cse9 8))) (or (= .cse9 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))) (let ((.cse13 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse14 (+ .cse12 8))) (or (= .cse12 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse13) .cse14) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse13) .cse14) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (let ((.cse15 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse16 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|) 8))) (or (= 0 .cse15) (not (= (select (select |c_#memory_$Pointer$.base| .cse15) .cse16) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse15) .cse16) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45| Int)) (let ((.cse17 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)) (.cse18 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|) 8))) (or (= 0 .cse17) (not (= (select (select |c_#memory_$Pointer$.base| .cse17) .cse18) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_38|)) (not (= (select (select |c_#memory_$Pointer$.offset| .cse17) .cse18) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_45|)))))))) (and .cse0 .cse7) (not (<= .cse8 0)) (and .cse3 .cse5) .cse2)))))) is different from false [2022-11-03 01:52:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:59,075 INFO L93 Difference]: Finished difference Result 380 states and 538 transitions. [2022-11-03 01:52:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 01:52:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 67 [2022-11-03 01:52:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:59,080 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:52:59,080 INFO L226 Difference]: Without dead ends: 300 [2022-11-03 01:52:59,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 117 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 4260 ImplicationChecksByTransitivity, 73.0s TimeCoverageRelationStatistics Valid=1048, Invalid=12530, Unknown=2, NotChecked=462, Total=14042 [2022-11-03 01:52:59,085 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 177 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:59,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1028 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2208 Invalid, 0 Unknown, 929 Unchecked, 11.4s Time] [2022-11-03 01:52:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-03 01:52:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 261. [2022-11-03 01:52:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 166 states have (on average 1.180722891566265) internal successors, (196), 176 states have internal predecessors, (196), 62 states have call successors, (62), 24 states have call predecessors, (62), 32 states have return successors, (103), 60 states have call predecessors, (103), 61 states have call successors, (103) [2022-11-03 01:52:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 361 transitions. [2022-11-03 01:52:59,217 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 361 transitions. Word has length 67 [2022-11-03 01:52:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:59,217 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 361 transitions. [2022-11-03 01:52:59,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 01:52:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 361 transitions. [2022-11-03 01:52:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:52:59,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:59,220 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1] [2022-11-03 01:52:59,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-03 01:52:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:52:59,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:59,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2057962446, now seen corresponding path program 2 times [2022-11-03 01:52:59,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:59,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673521354] [2022-11-03 01:52:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 01:52:59,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:59,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673521354] [2022-11-03 01:52:59,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673521354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:59,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853294594] [2022-11-03 01:52:59,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:59,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:59,904 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:59,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:53:00,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:53:00,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:53:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:00,341 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:53:00,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-11-03 01:53:14,768 WARN L234 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:53:29,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:53:49,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853294594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:49,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687885995] [2022-11-03 01:53:49,910 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:53:49,910 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:49,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:49,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:49,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,379 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:53:50,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:53:50,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 01:53:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:53:50,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:53:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:53:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:53:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:50,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:53:50,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:53:50,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:53:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:51,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:53:52,711 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 134 for LOIs [2022-11-03 01:53:52,797 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:53:53,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:53:53,669 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:53:53,691 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:53:53,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:40,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9990#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 16) 0) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|)) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 32) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 24) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 24) 0) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 0)) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_70|) 16) 0))) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:40,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:40,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:40,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 7] total 20 [2022-11-03 01:54:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110967363] [2022-11-03 01:54:40,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:54:40,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:54:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1894, Unknown=5, NotChecked=0, Total=2162 [2022-11-03 01:54:40,795 INFO L87 Difference]: Start difference. First operand 261 states and 361 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:54:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:47,152 INFO L93 Difference]: Finished difference Result 377 states and 527 transitions. [2022-11-03 01:54:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:54:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 68 [2022-11-03 01:54:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:47,155 INFO L225 Difference]: With dead ends: 377 [2022-11-03 01:54:47,155 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 01:54:47,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=339, Invalid=2848, Unknown=5, NotChecked=0, Total=3192 [2022-11-03 01:54:47,158 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:47,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 301 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 370 Invalid, 0 Unknown, 60 Unchecked, 2.2s Time] [2022-11-03 01:54:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 01:54:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 261. [2022-11-03 01:54:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 167 states have (on average 1.1497005988023952) internal successors, (192), 177 states have internal predecessors, (192), 60 states have call successors, (60), 25 states have call predecessors, (60), 33 states have return successors, (107), 58 states have call predecessors, (107), 59 states have call successors, (107) [2022-11-03 01:54:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 359 transitions. [2022-11-03 01:54:47,315 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 359 transitions. Word has length 68 [2022-11-03 01:54:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:47,315 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 359 transitions. [2022-11-03 01:54:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:54:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 359 transitions. [2022-11-03 01:54:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 01:54:47,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:47,317 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:47,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:54:47,539 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1322446601, now seen corresponding path program 1 times [2022-11-03 01:54:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:47,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843539684] [2022-11-03 01:54:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:54:49,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843539684] [2022-11-03 01:54:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843539684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76373626] [2022-11-03 01:54:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:49,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:49,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:49,354 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:49,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:54:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:49,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 01:54:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:54:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:56,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 11 [2022-11-03 01:54:57,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:54:57,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 22 [2022-11-03 01:54:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:54:59,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76373626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:59,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154889546] [2022-11-03 01:54:59,045 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:54:59,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:59,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:59,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:59,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,464 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:54:59,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:54:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,910 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:54:59,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:55:00,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:55:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:55:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:55:00,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:55:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:55:00,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:55:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:55:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:55:10,139 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-03 01:55:10,380 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:55:11,124 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:55:11,130 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:55:11,151 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:55:11,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:55,350 WARN L234 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 219 DAG size of output: 173 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:09,388 WARN L234 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 228 DAG size of output: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:13,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11425#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 4)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 2)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 16) 0) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 5)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_112|) 0) 3)))) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 33 (select |#length| 2)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:13,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:13,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:13,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 15] total 38 [2022-11-03 01:56:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360183197] [2022-11-03 01:56:13,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:13,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:56:13,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:56:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3809, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 01:56:13,882 INFO L87 Difference]: Start difference. First operand 261 states and 359 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (27), 3 states have call predecessors, (27), 8 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) [2022-11-03 01:56:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:24,267 INFO L93 Difference]: Finished difference Result 336 states and 475 transitions. [2022-11-03 01:56:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:56:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (27), 3 states have call predecessors, (27), 8 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) Word has length 69 [2022-11-03 01:56:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:24,270 INFO L225 Difference]: With dead ends: 336 [2022-11-03 01:56:24,270 INFO L226 Difference]: Without dead ends: 283 [2022-11-03 01:56:24,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=579, Invalid=6063, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 01:56:24,273 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 189 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:24,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1095 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 906 Invalid, 0 Unknown, 211 Unchecked, 5.0s Time] [2022-11-03 01:56:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-03 01:56:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 259. [2022-11-03 01:56:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 175 states have internal predecessors, (189), 60 states have call successors, (60), 25 states have call predecessors, (60), 32 states have return successors, (95), 58 states have call predecessors, (95), 59 states have call successors, (95) [2022-11-03 01:56:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 344 transitions. [2022-11-03 01:56:24,421 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 344 transitions. Word has length 69 [2022-11-03 01:56:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:24,422 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 344 transitions. [2022-11-03 01:56:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (27), 3 states have call predecessors, (27), 8 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) [2022-11-03 01:56:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 344 transitions. [2022-11-03 01:56:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:56:24,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:24,423 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:24,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:56:24,636 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1272987309, now seen corresponding path program 1 times [2022-11-03 01:56:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63558021] [2022-11-03 01:56:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:24,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 01:56:25,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:25,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63558021] [2022-11-03 01:56:25,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63558021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:25,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:25,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:56:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638899583] [2022-11-03 01:56:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:25,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:56:25,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:56:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:56:25,205 INFO L87 Difference]: Start difference. First operand 259 states and 344 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 01:56:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:26,227 INFO L93 Difference]: Finished difference Result 273 states and 361 transitions. [2022-11-03 01:56:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-03 01:56:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:26,229 INFO L225 Difference]: With dead ends: 273 [2022-11-03 01:56:26,230 INFO L226 Difference]: Without dead ends: 271 [2022-11-03 01:56:26,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:56:26,231 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:26,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:56:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-03 01:56:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2022-11-03 01:56:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 169 states have (on average 1.136094674556213) internal successors, (192), 178 states have internal predecessors, (192), 64 states have call successors, (64), 26 states have call predecessors, (64), 33 states have return successors, (99), 62 states have call predecessors, (99), 63 states have call successors, (99) [2022-11-03 01:56:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 355 transitions. [2022-11-03 01:56:26,346 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 355 transitions. Word has length 70 [2022-11-03 01:56:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:26,346 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 355 transitions. [2022-11-03 01:56:26,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 01:56:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 355 transitions. [2022-11-03 01:56:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:56:26,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:26,349 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 01:56:26,349 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -588384080, now seen corresponding path program 2 times [2022-11-03 01:56:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:26,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648648448] [2022-11-03 01:56:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:30,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648648448] [2022-11-03 01:56:30,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648648448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261960045] [2022-11-03 01:56:30,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:30,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:30,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:56:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:56:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 01:56:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:59,081 WARN L234 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:56:59,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:03,713 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:03,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-03 01:57:03,782 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:03,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 01:57:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:04,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261960045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420498780] [2022-11-03 01:57:04,205 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:57:04,205 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:04,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:04,206 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:04,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:04,589 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:57:04,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 01:57:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,004 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:57:05,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:57:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:57:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:57:05,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:57:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:57:05,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:57:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:57:05,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 01:57:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:05,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:57:15,201 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 01:57:15,435 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 01:57:16,013 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 01:57:16,057 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:57:16,079 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:57:16,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:53,487 WARN L234 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 219 DAG size of output: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:06,293 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 228 DAG size of output: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:12,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13651#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 0) 16) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 16) 0) (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 24)) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| 5)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 8) 0) (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 0)) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| 3)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| 2)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67|) 24) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_#in~list#1.base_BEFORE_CALL_67| 4)))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:58:12,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:58:12,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:12,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-11-03 01:58:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189387073] [2022-11-03 01:58:12,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:58:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:58:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3631, Unknown=7, NotChecked=0, Total=4032 [2022-11-03 01:58:12,817 INFO L87 Difference]: Start difference. First operand 267 states and 355 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-03 01:58:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:38,910 INFO L93 Difference]: Finished difference Result 495 states and 679 transitions. [2022-11-03 01:58:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 01:58:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-03 01:58:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:38,913 INFO L225 Difference]: With dead ends: 495 [2022-11-03 01:58:38,914 INFO L226 Difference]: Without dead ends: 307 [2022-11-03 01:58:38,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 106.8s TimeCoverageRelationStatistics Valid=688, Invalid=6438, Unknown=14, NotChecked=0, Total=7140 [2022-11-03 01:58:38,915 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 329 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:38,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1079 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1377 Invalid, 0 Unknown, 403 Unchecked, 7.2s Time] [2022-11-03 01:58:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-03 01:58:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 225. [2022-11-03 01:58:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 154 states have internal predecessors, (163), 48 states have call successors, (48), 25 states have call predecessors, (48), 31 states have return successors, (66), 45 states have call predecessors, (66), 47 states have call successors, (66) [2022-11-03 01:58:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 277 transitions. [2022-11-03 01:58:39,066 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 277 transitions. Word has length 73 [2022-11-03 01:58:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:39,066 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 277 transitions. [2022-11-03 01:58:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-03 01:58:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 277 transitions. [2022-11-03 01:58:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:58:39,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:39,068 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:39,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:39,284 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1098738422, now seen corresponding path program 2 times [2022-11-03 01:58:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632115542] [2022-11-03 01:58:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:58:42,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:42,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632115542] [2022-11-03 01:58:42,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632115542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:42,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619647343] [2022-11-03 01:58:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:58:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:42,511 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:42,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:58:42,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:58:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:58:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 01:58:44,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619647343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:44,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:58:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-03 01:58:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318976767] [2022-11-03 01:58:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:58:44,788 INFO L87 Difference]: Start difference. First operand 225 states and 277 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 01:58:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:45,202 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2022-11-03 01:58:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-03 01:58:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:45,204 INFO L225 Difference]: With dead ends: 283 [2022-11-03 01:58:45,204 INFO L226 Difference]: Without dead ends: 215 [2022-11-03 01:58:45,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:58:45,207 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:45,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-11-03 01:58:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-03 01:58:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-11-03 01:58:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 142 states have internal predecessors, (148), 46 states have call successors, (46), 24 states have call predecessors, (46), 28 states have return successors, (61), 43 states have call predecessors, (61), 45 states have call successors, (61) [2022-11-03 01:58:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 255 transitions. [2022-11-03 01:58:45,372 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 255 transitions. Word has length 75 [2022-11-03 01:58:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:45,372 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 255 transitions. [2022-11-03 01:58:45,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 01:58:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 255 transitions. [2022-11-03 01:58:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 01:58:45,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:45,374 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] [2022-11-03 01:58:45,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:45,581 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1482573395, now seen corresponding path program 1 times [2022-11-03 01:58:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447690169] [2022-11-03 01:58:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 01:58:46,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:46,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447690169] [2022-11-03 01:58:46,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447690169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:46,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:46,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524185720] [2022-11-03 01:58:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:46,277 INFO L87 Difference]: Start difference. First operand 210 states and 255 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 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) [2022-11-03 01:58:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:47,163 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2022-11-03 01:58:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:58:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 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 [2022-11-03 01:58:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:47,166 INFO L225 Difference]: With dead ends: 216 [2022-11-03 01:58:47,166 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 01:58:47,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:58:47,167 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:47,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 193 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 01:58:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-11-03 01:58:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 145 states have internal predecessors, (151), 46 states have call successors, (46), 25 states have call predecessors, (46), 29 states have return successors, (61), 43 states have call predecessors, (61), 45 states have call successors, (61) [2022-11-03 01:58:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 258 transitions. [2022-11-03 01:58:47,280 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 258 transitions. Word has length 76 [2022-11-03 01:58:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:47,281 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 258 transitions. [2022-11-03 01:58:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 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) [2022-11-03 01:58:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 258 transitions. [2022-11-03 01:58:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 01:58:47,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:47,283 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] [2022-11-03 01:58:47,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 01:58:47,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash -49882935, now seen corresponding path program 1 times [2022-11-03 01:58:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:47,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614983321] [2022-11-03 01:58:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:47,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 01:58:48,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614983321] [2022-11-03 01:58:48,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614983321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:48,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:48,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:58:48,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377430432] [2022-11-03 01:58:48,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:58:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:58:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:58:48,931 INFO L87 Difference]: Start difference. First operand 214 states and 258 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 01:58:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:49,869 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2022-11-03 01:58:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:58:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 82 [2022-11-03 01:58:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:49,874 INFO L225 Difference]: With dead ends: 220 [2022-11-03 01:58:49,874 INFO L226 Difference]: Without dead ends: 218 [2022-11-03 01:58:49,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:58:49,875 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:58:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-03 01:58:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-11-03 01:58:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 148 states have internal predecessors, (154), 46 states have call successors, (46), 26 states have call predecessors, (46), 30 states have return successors, (61), 43 states have call predecessors, (61), 45 states have call successors, (61) [2022-11-03 01:58:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 261 transitions. [2022-11-03 01:58:50,010 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 261 transitions. Word has length 82 [2022-11-03 01:58:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:50,010 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 261 transitions. [2022-11-03 01:58:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 01:58:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 261 transitions. [2022-11-03 01:58:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 01:58:50,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:50,012 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] [2022-11-03 01:58:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 01:58:50,013 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash -661104954, now seen corresponding path program 1 times [2022-11-03 01:58:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:50,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093098059] [2022-11-03 01:58:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:50,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 5 proven. 97 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:58:59,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093098059] [2022-11-03 01:58:59,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093098059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656991607] [2022-11-03 01:58:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:59,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:59,058 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:59,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:58:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 169 conjunts are in the unsatisfiable core [2022-11-03 01:58:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:00,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 01:59:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:59:00,732 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-03 01:59:00,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_140| input size 47 context size 47 output size 47 [2022-11-03 01:59:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340116111] [2022-11-03 01:59:00,734 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 01:59:00,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:00,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:00,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:00,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,161 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:59:01,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 01:59:01,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 01:59:01,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 01:59:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:59:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 01:59:01,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 01:59:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:01,850 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:59:01,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 01:59:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:59:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,421 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:59:02,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 01:59:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 01:59:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 01:59:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:02,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 01:59:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:59:02,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:59:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:59:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 01:59:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:59:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 01:59:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 01:59:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:02,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:59:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:03,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:03,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 01:59:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:03,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 01:59:04,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-03 01:59:04,387 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 59 for LOIs [2022-11-03 01:59:05,539 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-03 01:59:05,546 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:59:05,567 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:59:05,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:40,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17126#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:40,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:40,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:59:40,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-03 01:59:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926554066] [2022-11-03 01:59:40,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:40,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:59:40,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:59:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2892, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:59:40,335 INFO L87 Difference]: Start difference. First operand 218 states and 261 transitions. Second operand has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:00:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:00,354 INFO L93 Difference]: Finished difference Result 427 states and 604 transitions. [2022-11-03 02:00:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:00:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) Word has length 86 [2022-11-03 02:00:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:00,358 INFO L225 Difference]: With dead ends: 427 [2022-11-03 02:00:00,358 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:00:00,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=359, Invalid=5043, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 02:00:00,359 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 162 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:00,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1047 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-11-03 02:00:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:00:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 264. [2022-11-03 02:00:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 181 states have internal predecessors, (191), 59 states have call successors, (59), 27 states have call predecessors, (59), 33 states have return successors, (90), 55 states have call predecessors, (90), 58 states have call successors, (90) [2022-11-03 02:00:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 340 transitions. [2022-11-03 02:00:00,501 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 340 transitions. Word has length 86 [2022-11-03 02:00:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:00,501 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 340 transitions. [2022-11-03 02:00:00,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 02:00:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 340 transitions. [2022-11-03 02:00:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:00:00,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:00,504 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:00,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:00,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:00:00,719 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2121354386, now seen corresponding path program 2 times [2022-11-03 02:00:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644153611] [2022-11-03 02:00:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:00:05,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:05,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644153611] [2022-11-03 02:00:05,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644153611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:05,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334385400] [2022-11-03 02:00:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:05,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:05,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:05,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:05,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c73967aa-251a-4559-af05-056b290e4f64/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:00:06,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:00:06,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-03 02:00:06,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:07,062 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:00:07,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:00:07,251 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:00:07,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:00:07,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:00:07,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:00:07,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:00:07,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:00:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:07,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:07,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 7 [2022-11-03 02:00:07,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:00:07,680 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-03 02:00:07,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 28 [2022-11-03 02:00:07,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:00:07,729 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (and (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse1))) (or (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| .cse0) (exists ((v_DerPreprocessor_76 (Array Int Int)) (v_DerPreprocessor_77 (Array Int Int))) (and (= (select v_DerPreprocessor_77 .cse1) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_76) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| v_DerPreprocessor_77) .cse0 v_DerPreprocessor_76) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| v_DerPreprocessor_77) .cse0) (select |c_#memory_$Pointer$.base| .cse0)))))) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse1) 0))) is different from true [2022-11-03 02:00:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 95 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:00:54,451 INFO L328 TraceCheckSpWp]: Computing backward predicates...