./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P --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 --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:57:15,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:57:15,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:57:15,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:57:15,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:57:15,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:57:15,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:57:15,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:57:15,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:57:15,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:57:15,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:57:15,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:57:15,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:57:15,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:57:15,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:57:15,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:57:15,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:57:15,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:57:16,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:57:16,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:57:16,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:57:16,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:57:16,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:57:16,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:57:16,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:57:16,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:57:16,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:57:16,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:57:16,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:57:16,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:57:16,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:57:16,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:57:16,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:57:16,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:57:16,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:57:16,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:57:16,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:57:16,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:57:16,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:57:16,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:57:16,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:57:16,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:57:16,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:57:16,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:57:16,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:57:16,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:57:16,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:57:16,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:57:16,110 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:57:16,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:57:16,111 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:57:16,111 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:57:16,112 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:57:16,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:57:16,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:57:16,113 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:57:16,113 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:57:16,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:57:16,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:57:16,113 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:57:16,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:57:16,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:57:16,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:57:16,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:57:16,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:57:16,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:57:16,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:57:16,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:57:16,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:57:16,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:57:16,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:57:16,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:57:16,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:57:16,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:57:16,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:57:16,120 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-21 01:57:16,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:57:16,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:57:16,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:57:16,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:57:16,412 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:57:16,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-21 01:57:16,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/data/616d8f5d4/672800248d0e4206b93bd0dd32e62003/FLAG4023a4276 [2021-11-21 01:57:17,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:57:17,286 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-21 01:57:17,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/data/616d8f5d4/672800248d0e4206b93bd0dd32e62003/FLAG4023a4276 [2021-11-21 01:57:17,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/data/616d8f5d4/672800248d0e4206b93bd0dd32e62003 [2021-11-21 01:57:17,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:57:17,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:57:17,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:57:17,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:57:17,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:57:17,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:17" (1/1) ... [2021-11-21 01:57:17,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c88a552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:17, skipping insertion in model container [2021-11-21 01:57:17,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:17" (1/1) ... [2021-11-21 01:57:17,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:57:17,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:57:18,261 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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-21 01:57:18,267 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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-21 01:57:19,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,111 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,112 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,114 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,114 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,116 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,481 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:57:19,482 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:57:19,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:57:19,485 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:57:19,487 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:57:19,488 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:57:19,488 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:57:19,489 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:57:19,490 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:57:19,491 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:57:19,643 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:57:19,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:57:19,712 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:57:19,726 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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-21 01:57:19,727 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_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-21 01:57:19,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,786 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,786 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:57:19,874 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:57:19,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:57:19,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:57:19,892 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:57:19,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:57:19,899 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:57:19,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:57:19,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:57:19,902 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:57:19,903 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:57:19,938 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:57:19,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:57:20,223 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:57:20,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20 WrapperNode [2021-11-21 01:57:20,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:57:20,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:57:20,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:57:20,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:57:20,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,417 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2021-11-21 01:57:20,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:57:20,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:57:20,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:57:20,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:57:20,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:57:20,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:57:20,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:57:20,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:57:20,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (1/1) ... [2021-11-21 01:57:20,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:57:20,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:20,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:57:20,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:57:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:57:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:57:20,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:57:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:57:20,602 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:57:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:57:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 01:57:20,603 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 01:57:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:57:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:57:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:57:20,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:57:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:57:20,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:57:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:57:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:57:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:57:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:57:20,604 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:57:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:57:20,865 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:57:20,867 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:57:21,209 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:57:21,351 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:57:21,352 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:57:21,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:21 BoogieIcfgContainer [2021-11-21 01:57:21,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:57:21,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:57:21,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:57:21,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:57:21,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:57:17" (1/3) ... [2021-11-21 01:57:21,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a754532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:21, skipping insertion in model container [2021-11-21 01:57:21,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:20" (2/3) ... [2021-11-21 01:57:21,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a754532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:21, skipping insertion in model container [2021-11-21 01:57:21,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:21" (3/3) ... [2021-11-21 01:57:21,365 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-11-21 01:57:21,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:57:21,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:57:21,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:57:21,447 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:57:21,450 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:57:21,480 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) [2021-11-21 01:57:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:57:21,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:21,489 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:57:21,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:57:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2063254078, now seen corresponding path program 1 times [2021-11-21 01:57:21,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605432876] [2021-11-21 01:57:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:21,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:57:21,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605432876] [2021-11-21 01:57:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605432876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:57:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813517091] [2021-11-21 01:57:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:21,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:21,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:21,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:57:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:57:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,347 INFO L388 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 [2021-11-21 01:57:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,360 INFO L388 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 [2021-11-21 01:57:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,489 INFO L388 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 [2021-11-21 01:57:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:22,516 INFO L388 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 [2021-11-21 01:57:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:57:25,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813517091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:25,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:57:25,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-21 01:57:25,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657138564] [2021-11-21 01:57:25,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:25,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:57:25,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:57:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:57:25,425 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) [2021-11-21 01:57:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:25,850 INFO L93 Difference]: Finished difference Result 119 states and 174 transitions. [2021-11-21 01:57:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:57:25,852 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 [2021-11-21 01:57:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:25,863 INFO L225 Difference]: With dead ends: 119 [2021-11-21 01:57:25,863 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 01:57:25,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:57:25,875 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:25,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 228 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2021-11-21 01:57:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 01:57:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-11-21 01:57:25,938 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) [2021-11-21 01:57:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-11-21 01:57:25,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 37 [2021-11-21 01:57:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:25,942 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-11-21 01:57:25,942 INFO L471 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) [2021-11-21 01:57:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-11-21 01:57:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:57:25,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:25,945 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:57:25,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:26,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:57:26,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:57:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1943617686, now seen corresponding path program 1 times [2021-11-21 01:57:26,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:26,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515055821] [2021-11-21 01:57:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:26,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:57:26,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515055821] [2021-11-21 01:57:26,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515055821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:57:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859258818] [2021-11-21 01:57:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:26,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:26,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:26,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:57:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 01:57:26,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,659 INFO L388 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 [2021-11-21 01:57:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,679 INFO L388 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 [2021-11-21 01:57:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-21 01:57:26,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-21 01:57:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,024 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 01:57:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 186 treesize of output 140 [2021-11-21 01:57:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:27,099 INFO L354 Elim1Store]: treesize reduction 276, result has 16.4 percent of original size [2021-11-21 01:57:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 161 treesize of output 149 [2021-11-21 01:57:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:29,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:56,866 WARN L227 SmtUtils]: Spent 14.19s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:57:59,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_2 Int)) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_4 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse5 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8))) (or (not (= (select (select (let ((.cse2 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse7 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse7 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_5 Int)) (let ((.cse9 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse11 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8)) (.cse12 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse8 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_5 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse9 v_subst_5))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse12) 0)) (not (= (select (select (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse9 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse12) 0))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_1 Int)) (= (select (select (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_1))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_3 Int)) (= (select (select (let ((.cse17 (let ((.cse18 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse18 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse18 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_3))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_6 Int)) (= (select (select (let ((.cse19 (let ((.cse20 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) is different from false [2021-11-21 01:58:01,255 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:58:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138851 treesize of output 138435 [2021-11-21 01:58:09,297 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 1171 DAG size of output: 1171 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:58:09,465 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:58:09,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 687195 treesize of output 685403 [2021-11-21 01:58:35,428 WARN L227 SmtUtils]: Spent 25.95s on a formula simplification. DAG size of input: 2570 DAG size of output: 2568 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:58:35,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:58:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438178756] [2021-11-21 01:58:35,517 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 01:58:35,518 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:58:35,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:58:35,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:58:35,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:58:35,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:35,659 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:58:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 01:58:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:35,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:35,857 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:58:35,858 INFO L388 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 [2021-11-21 01:58:38,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,440 INFO L388 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 [2021-11-21 01:58:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,522 INFO L388 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 [2021-11-21 01:58:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,696 INFO L388 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 [2021-11-21 01:58:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:38,852 INFO L388 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 [2021-11-21 01:58:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:39,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:39,090 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 01:58:39,091 INFO L388 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 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 01:58:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:39,309 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:58:39,309 INFO L388 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 [2021-11-21 01:58:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,531 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 01:58:39,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 01:58:39,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,698 INFO L388 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 [2021-11-21 01:58:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,740 INFO L388 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 [2021-11-21 01:58:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:39,794 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:58:39,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 01:58:39,988 INFO L388 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 [2021-11-21 01:58:40,120 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:58:40,121 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:58:40,151 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:58:40,152 INFO L388 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 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 01:58:40,178 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:58:40,178 INFO L388 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 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 01:58:40,202 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:58:40,203 INFO L388 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 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:58:40,234 INFO L388 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 [2021-11-21 01:58:40,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:40,322 INFO L388 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 [2021-11-21 01:58:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:40,364 INFO L388 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 [2021-11-21 01:58:40,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:40,392 INFO L388 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 [2021-11-21 01:58:40,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:40,422 INFO L388 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 [2021-11-21 01:58:42,706 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2021-11-21 01:58:44,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 34 for LOIs [2021-11-21 01:58:44,241 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 01:58:44,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:58:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1438178756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:46,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:58:46,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2021-11-21 01:58:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658340103] [2021-11-21 01:58:46,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:46,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:58:46,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:58:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=669, Unknown=5, NotChecked=52, Total=812 [2021-11-21 01:58:46,521 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) [2021-11-21 01:58:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:47,062 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2021-11-21 01:58:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:58:47,063 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 [2021-11-21 01:58:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:47,066 INFO L225 Difference]: With dead ends: 100 [2021-11-21 01:58:47,066 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 01:58:47,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=94, Invalid=717, Unknown=5, NotChecked=54, Total=870 [2021-11-21 01:58:47,069 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:47,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 381 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2021-11-21 01:58:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 01:58:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-11-21 01:58:47,080 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) [2021-11-21 01:58:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-11-21 01:58:47,082 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2021-11-21 01:58:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:47,082 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-11-21 01:58:47,082 INFO L471 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) [2021-11-21 01:58:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-11-21 01:58:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:58:47,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:47,084 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:58:47,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:47,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:58:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1859140634, now seen corresponding path program 1 times [2021-11-21 01:58:47,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325304645] [2021-11-21 01:58:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:47,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:58:47,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:47,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325304645] [2021-11-21 01:58:47,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325304645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850917679] [2021-11-21 01:58:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:47,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:47,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:58:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:58:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:58:47,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:58:47,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850917679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:47,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:58:47,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 01:58:47,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341424483] [2021-11-21 01:58:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:47,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:58:47,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:58:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:58:47,685 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) [2021-11-21 01:58:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:47,826 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2021-11-21 01:58:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:58:47,827 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 [2021-11-21 01:58:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:47,828 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:58:47,828 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:58:47,829 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:58:47,830 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:47,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 151 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:58:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:58:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-21 01:58:47,843 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) [2021-11-21 01:58:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-21 01:58:47,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2021-11-21 01:58:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:47,845 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-21 01:58:47,845 INFO L471 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) [2021-11-21 01:58:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-21 01:58:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:58:47,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:47,847 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:58:47,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:48,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:58:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2129804384, now seen corresponding path program 1 times [2021-11-21 01:58:48,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482647886] [2021-11-21 01:58:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:48,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:58:48,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:48,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482647886] [2021-11-21 01:58:48,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482647886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:48,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138991199] [2021-11-21 01:58:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:48,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:48,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:48,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:58:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:58:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:58:48,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:58:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138991199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:48,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:58:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 01:58:48,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569561402] [2021-11-21 01:58:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:58:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:58:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:58:48,443 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) [2021-11-21 01:58:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:48,644 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2021-11-21 01:58:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:58:48,645 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 [2021-11-21 01:58:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:48,649 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:58:48,650 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:58:48,654 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:58:48,657 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:48,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 182 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:58:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:58:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-11-21 01:58:48,683 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) [2021-11-21 01:58:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-21 01:58:48,688 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-11-21 01:58:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:48,689 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-21 01:58:48,689 INFO L471 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) [2021-11-21 01:58:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-21 01:58:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:58:48,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:48,696 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:58:48,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:48,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:48,918 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:58:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash -647115340, now seen corresponding path program 1 times [2021-11-21 01:58:48,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:48,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904449612] [2021-11-21 01:58:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:48,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:58:49,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904449612] [2021-11-21 01:58:49,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904449612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105831166] [2021-11-21 01:58:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:49,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:49,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:49,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:49,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:58:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:58:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:58:49,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:58:49,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105831166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:49,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:58:49,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-21 01:58:49,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735906718] [2021-11-21 01:58:49,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:58:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:58:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:58:49,262 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) [2021-11-21 01:58:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:49,316 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2021-11-21 01:58:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:58:49,317 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 [2021-11-21 01:58:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:49,318 INFO L225 Difference]: With dead ends: 106 [2021-11-21 01:58:49,318 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 01:58:49,319 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:58:49,320 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:49,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:58:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 01:58:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-21 01:58:49,332 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) [2021-11-21 01:58:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-11-21 01:58:49,333 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2021-11-21 01:58:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-11-21 01:58:49,334 INFO L471 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) [2021-11-21 01:58:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-11-21 01:58:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:58:49,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:49,335 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:58:49,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:49,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:49,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:58:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash 625474841, now seen corresponding path program 1 times [2021-11-21 01:58:49,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:49,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550538051] [2021-11-21 01:58:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:49,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:58:49,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550538051] [2021-11-21 01:58:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550538051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708858788] [2021-11-21 01:58:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:49,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:49,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:49,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:58:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-21 01:58:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:49,923 INFO L388 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 16 treesize of output 17 [2021-11-21 01:58:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:49,931 INFO L388 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 18 treesize of output 19 [2021-11-21 01:58:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:57,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:59:02,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708858788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101626007] [2021-11-21 01:59:02,268 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 01:59:02,268 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:59:02,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:59:02,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:59:02,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:59:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:02,367 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:59:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 01:59:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:02,462 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:59:02,463 INFO L388 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 [2021-11-21 01:59:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,430 INFO L388 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 [2021-11-21 01:59:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,499 INFO L388 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 [2021-11-21 01:59:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,573 INFO L388 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 [2021-11-21 01:59:04,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,648 INFO L388 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 [2021-11-21 01:59:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,807 INFO L388 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 [2021-11-21 01:59:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,860 INFO L388 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 [2021-11-21 01:59:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,899 INFO L388 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 [2021-11-21 01:59:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,023 INFO L388 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 [2021-11-21 01:59:10,524 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-21 01:59:14,380 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 01:59:14,412 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 01:59:14,608 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-21 01:59:15,193 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:19,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [101626007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:19,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:59:19,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 16, 8] total 41 [2021-11-21 01:59:19,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505521415] [2021-11-21 01:59:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:19,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:59:19,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:59:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:59:19,567 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 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) [2021-11-21 01:59:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:20,389 INFO L93 Difference]: Finished difference Result 133 states and 186 transitions. [2021-11-21 01:59:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:59:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 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 [2021-11-21 01:59:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:20,392 INFO L225 Difference]: With dead ends: 133 [2021-11-21 01:59:20,392 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:59:20,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:59:20,394 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:20,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 283 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 298 Invalid, 0 Unknown, 30 Unchecked, 0.8s Time] [2021-11-21 01:59:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:59:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2021-11-21 01:59:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.25) internal successors, (60), 51 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2021-11-21 01:59:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-11-21 01:59:20,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 45 [2021-11-21 01:59:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-11-21 01:59:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 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) [2021-11-21 01:59:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-11-21 01:59:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:59:20,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:20,419 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:59:20,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:20,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:59:20,630 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:59:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 105816945, now seen corresponding path program 1 times [2021-11-21 01:59:20,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:20,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785135216] [2021-11-21 01:59:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:20,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:59:20,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:20,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785135216] [2021-11-21 01:59:20,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785135216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:59:20,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977574603] [2021-11-21 01:59:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:20,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:20,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:20,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:59:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-21 01:59:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:21,004 INFO L388 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 [2021-11-21 01:59:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:21,086 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 01:59:21,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 81 [2021-11-21 01:59:21,097 INFO L354 Elim1Store]: treesize reduction 47, result has 24.2 percent of original size [2021-11-21 01:59:21,098 INFO L388 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 120 treesize of output 87 [2021-11-21 01:59:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:59:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:59:37,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977574603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975003272] [2021-11-21 01:59:37,800 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 01:59:37,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:59:37,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:59:37,801 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:59:37,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:59:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:37,899 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:59:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 01:59:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:38,046 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:59:38,046 INFO L388 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 [2021-11-21 01:59:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,862 INFO L388 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 [2021-11-21 01:59:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:39,960 INFO L388 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 [2021-11-21 01:59:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,036 INFO L388 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 [2021-11-21 01:59:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,127 INFO L388 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 [2021-11-21 01:59:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,315 INFO L388 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 [2021-11-21 01:59:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,422 INFO L354 Elim1Store]: treesize reduction 82, result has 35.9 percent of original size [2021-11-21 01:59:40,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 01:59:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,596 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 01:59:40,596 INFO L388 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 [2021-11-21 01:59:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,727 INFO L388 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 [2021-11-21 01:59:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:40,836 INFO L388 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 [2021-11-21 01:59:40,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:40,965 INFO L388 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 [2021-11-21 01:59:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,373 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 01:59:41,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 01:59:41,720 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 01:59:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 503 treesize of output 593 [2021-11-21 01:59:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:41,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:41,995 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 01:59:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 587 treesize of output 603 [2021-11-21 01:59:42,283 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 01:59:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 636 treesize of output 717 [2021-11-21 01:59:42,382 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 01:59:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 01:59:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:42,421 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 01:59:42,515 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:59:42,516 INFO L388 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 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 01:59:55,147 INFO L388 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 [2021-11-21 01:59:55,216 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:59:55,217 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:59:55,247 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:59:55,296 INFO L388 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 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 01:59:55,323 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:59:55,325 INFO L388 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 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 01:59:55,346 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:59:55,346 INFO L388 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 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:59:55,411 INFO L388 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 [2021-11-21 01:59:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:55,534 INFO L388 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 [2021-11-21 01:59:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:55,580 INFO L388 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 [2021-11-21 01:59:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:55,595 INFO L388 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 [2021-11-21 01:59:55,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:55,623 INFO L388 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 [2021-11-21 01:59:58,812 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-21 02:00:03,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:00:03,324 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:00:03,436 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 80 for LOIs [2021-11-21 02:00:03,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:00:09,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [975003272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:00:09,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:00:09,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 18, 10] total 47 [2021-11-21 02:00:09,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53792876] [2021-11-21 02:00:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:00:09,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 02:00:09,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:00:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 02:00:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1994, Unknown=1, NotChecked=0, Total=2162 [2021-11-21 02:00:09,472 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 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) [2021-11-21 02:00:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:10,534 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2021-11-21 02:00:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 02:00:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 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 [2021-11-21 02:00:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:10,537 INFO L225 Difference]: With dead ends: 130 [2021-11-21 02:00:10,538 INFO L226 Difference]: Without dead ends: 82 [2021-11-21 02:00:10,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=182, Invalid=2169, Unknown=1, NotChecked=0, Total=2352 [2021-11-21 02:00:10,540 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:10,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 199 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 254 Invalid, 0 Unknown, 209 Unchecked, 0.5s Time] [2021-11-21 02:00:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-21 02:00:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-21 02:00:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 states have internal predecessors, (67), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2021-11-21 02:00:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-11-21 02:00:10,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 46 [2021-11-21 02:00:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-11-21 02:00:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 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) [2021-11-21 02:00:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-11-21 02:00:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 02:00:10,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:10,569 INFO L514 BasicCegarLoop]: 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] [2021-11-21 02:00:10,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 02:00:10,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:10,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:00:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2023309535, now seen corresponding path program 1 times [2021-11-21 02:00:10,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:00:10,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350291534] [2021-11-21 02:00:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:10,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:00:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 02:00:10,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:00:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350291534] [2021-11-21 02:00:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350291534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:00:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825087151] [2021-11-21 02:00:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:10,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:10,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:10,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 02:00:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 02:00:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:11,234 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:00:11,235 INFO L388 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 63 treesize of output 50 [2021-11-21 02:00:11,264 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 02:00:11,264 INFO L388 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 71 treesize of output 54 [2021-11-21 02:00:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:00:21,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 02:00:24,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825087151] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350962151] [2021-11-21 02:00:24,040 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:00:24,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:00:24,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:00:24,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:00:24,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:00:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:24,185 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:00:24,185 INFO L388 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 [2021-11-21 02:00:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 02:00:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,616 INFO L388 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 [2021-11-21 02:00:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,690 INFO L388 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 [2021-11-21 02:00:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:26,809 INFO L388 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 [2021-11-21 02:00:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,023 INFO L388 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 [2021-11-21 02:00:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,210 INFO L388 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 [2021-11-21 02:00:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,378 INFO L388 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 [2021-11-21 02:00:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,551 INFO L388 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 [2021-11-21 02:00:27,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:27,618 INFO L388 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 [2021-11-21 02:00:33,551 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-21 02:00:40,669 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 02:00:40,695 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:00:40,817 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-21 02:00:41,198 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:00:51,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [350962151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:00:51,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:00:51,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [8, 10, 6] total 36 [2021-11-21 02:00:51,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142570049] [2021-11-21 02:00:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:00:51,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 02:00:51,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:00:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 02:00:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 02:00:51,232 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 02:00:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:52,187 INFO L93 Difference]: Finished difference Result 146 states and 196 transitions. [2021-11-21 02:00:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 02:00:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2021-11-21 02:00:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:52,189 INFO L225 Difference]: With dead ends: 146 [2021-11-21 02:00:52,189 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 02:00:52,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 02:00:52,191 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 25 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 248 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 327 Invalid, 0 Unknown, 32 Unchecked, 0.9s Time] [2021-11-21 02:00:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 02:00:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-11-21 02:00:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 55 states have internal predecessors, (64), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2021-11-21 02:00:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-11-21 02:00:52,217 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 47 [2021-11-21 02:00:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:52,217 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-11-21 02:00:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 02:00:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-11-21 02:00:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 02:00:52,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:52,219 INFO L514 BasicCegarLoop]: 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] [2021-11-21 02:00:52,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 02:00:52,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:52,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:00:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 848277815, now seen corresponding path program 1 times [2021-11-21 02:00:52,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:00:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438089639] [2021-11-21 02:00:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:52,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:00:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 02:00:52,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:00:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438089639] [2021-11-21 02:00:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438089639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:00:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736280359] [2021-11-21 02:00:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:52,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:52,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 02:00:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 02:00:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:52,875 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:00:52,876 INFO L388 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 63 treesize of output 50 [2021-11-21 02:00:52,894 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 02:00:52,894 INFO L388 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 71 treesize of output 54 [2021-11-21 02:00:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 02:00:55,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 02:00:55,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736280359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:55,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349029832] [2021-11-21 02:00:55,477 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:00:55,477 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:00:55,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:00:55,478 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:00:55,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:00:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:55,580 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 02:00:55,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 02:00:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:55,776 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:00:55,776 INFO L388 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 [2021-11-21 02:00:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,753 INFO L388 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 [2021-11-21 02:00:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:57,905 INFO L388 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 [2021-11-21 02:00:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,031 INFO L388 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 [2021-11-21 02:00:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,116 INFO L388 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 [2021-11-21 02:00:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,318 INFO L354 Elim1Store]: treesize reduction 122, result has 27.4 percent of original size [2021-11-21 02:00:58,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 02:00:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:58,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:58,456 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-21 02:00:58,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 02:00:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 02:00:58,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 02:00:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 02:00:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:58,908 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 02:00:58,908 INFO L388 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 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 02:00:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,686 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-21 02:00:59,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 736 treesize of output 745 [2021-11-21 02:00:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:00:59,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:00:59,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:01:00,259 INFO L354 Elim1Store]: treesize reduction 603, result has 18.0 percent of original size [2021-11-21 02:01:00,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 827 treesize of output 836 [2021-11-21 02:01:00,351 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 02:01:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 930 treesize of output 883 [2021-11-21 02:01:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:00,411 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 885 treesize of output 864 [2021-11-21 02:01:00,794 INFO L354 Elim1Store]: treesize reduction 230, result has 21.8 percent of original size [2021-11-21 02:01:00,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 866 treesize of output 901 [2021-11-21 02:01:01,009 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-21 02:01:01,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 891 treesize of output 903 [2021-11-21 02:01:01,080 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:01:01,081 INFO L388 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 1 case distinctions, treesize of input 904 treesize of output 852 [2021-11-21 02:01:08,486 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:01:08,486 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 02:01:08,531 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:01:08,532 INFO L388 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 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 02:01:08,571 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:01:08,571 INFO L388 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 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 02:01:08,598 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 02:01:08,599 INFO L388 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 1 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 02:01:08,667 INFO L388 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 [2021-11-21 02:01:08,833 INFO L388 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 [2021-11-21 02:01:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:08,940 INFO L388 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 [2021-11-21 02:01:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:08,963 INFO L388 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 [2021-11-21 02:01:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:09,048 INFO L388 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 [2021-11-21 02:01:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:09,096 INFO L388 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 [2021-11-21 02:01:12,886 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-21 02:01:19,922 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:01:19,974 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:01:20,091 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:01:20,748 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:01:26,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [349029832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:01:26,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:01:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 10, 6] total 39 [2021-11-21 02:01:26,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474737208] [2021-11-21 02:01:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:01:26,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 02:01:26,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:01:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 02:01:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1325, Unknown=1, NotChecked=0, Total=1482 [2021-11-21 02:01:26,034 INFO L87 Difference]: Start difference. First operand 80 states and 100 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) [2021-11-21 02:01:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:27,488 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2021-11-21 02:01:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 02:01:27,489 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 [2021-11-21 02:01:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:27,490 INFO L225 Difference]: With dead ends: 146 [2021-11-21 02:01:27,490 INFO L226 Difference]: Without dead ends: 93 [2021-11-21 02:01:27,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=179, Invalid=1542, Unknown=1, NotChecked=0, Total=1722 [2021-11-21 02:01:27,492 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:27,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 216 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 438 Invalid, 0 Unknown, 101 Unchecked, 0.6s Time] [2021-11-21 02:01:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-21 02:01:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-11-21 02:01:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 61 states have internal predecessors, (71), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-21 02:01:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-11-21 02:01:27,528 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 48 [2021-11-21 02:01:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:27,529 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-11-21 02:01:27,529 INFO L471 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) [2021-11-21 02:01:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-11-21 02:01:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 02:01:27,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:27,530 INFO L514 BasicCegarLoop]: 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] [2021-11-21 02:01:27,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:27,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:27,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:01:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash -749602731, now seen corresponding path program 1 times [2021-11-21 02:01:27,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:01:27,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139170093] [2021-11-21 02:01:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:27,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:01:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:01:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:01:27,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:01:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139170093] [2021-11-21 02:01:27,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139170093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:01:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704114109] [2021-11-21 02:01:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:27,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:27,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:27,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 02:01:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:01:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-21 02:01:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:28,085 INFO L388 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 18 treesize of output 19 [2021-11-21 02:01:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:28,092 INFO L388 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 16 treesize of output 17 [2021-11-21 02:01:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 02:01:34,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 02:01:39,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704114109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104277000] [2021-11-21 02:01:39,014 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:01:39,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:01:39,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:01:39,015 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:01:39,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:01:39,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:39,113 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 02:01:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 02:01:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:39,247 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:01:39,247 INFO L388 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 [2021-11-21 02:01:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,316 INFO L388 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 [2021-11-21 02:01:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,442 INFO L388 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 [2021-11-21 02:01:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,517 INFO L388 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 [2021-11-21 02:01:41,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,651 INFO L388 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 [2021-11-21 02:01:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,841 INFO L388 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 [2021-11-21 02:01:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:41,942 INFO L388 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 [2021-11-21 02:01:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,034 INFO L388 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 [2021-11-21 02:01:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:01:42,111 INFO L388 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 [2021-11-21 02:01:55,396 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-21 02:01:56,672 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2021-11-21 02:02:02,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 02:02:02,412 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:02:02,526 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:02:03,048 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:02:11,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:02:11,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:02:11,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2021-11-21 02:02:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468246808] [2021-11-21 02:02:11,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 02:02:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 02:02:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:02:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 02:02:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 02:02:11,421 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-21 02:02:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:14,490 INFO L93 Difference]: Finished difference Result 264 states and 410 transitions. [2021-11-21 02:02:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 02:02:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 48 [2021-11-21 02:02:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:14,494 INFO L225 Difference]: With dead ends: 264 [2021-11-21 02:02:14,494 INFO L226 Difference]: Without dead ends: 221 [2021-11-21 02:02:14,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=496, Invalid=4474, Unknown=0, NotChecked=0, Total=4970 [2021-11-21 02:02:14,497 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 85 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:14,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 618 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1236 Invalid, 0 Unknown, 221 Unchecked, 1.7s Time] [2021-11-21 02:02:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-21 02:02:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2021-11-21 02:02:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 114 states have internal predecessors, (129), 33 states have call successors, (33), 15 states have call predecessors, (33), 22 states have return successors, (57), 31 states have call predecessors, (57), 32 states have call successors, (57) [2021-11-21 02:02:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 219 transitions. [2021-11-21 02:02:14,559 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 219 transitions. Word has length 48 [2021-11-21 02:02:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:14,559 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 219 transitions. [2021-11-21 02:02:14,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-21 02:02:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 219 transitions. [2021-11-21 02:02:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 02:02:14,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:14,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:14,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:14,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 02:02:14,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:02:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1087213269, now seen corresponding path program 1 times [2021-11-21 02:02:14,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:02:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239072911] [2021-11-21 02:02:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:14,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:02:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 02:02:14,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:02:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239072911] [2021-11-21 02:02:14,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239072911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:02:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95946306] [2021-11-21 02:02:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:14,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:02:14,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:02:14,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 02:02:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 02:02:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 02:02:15,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 02:02:15,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95946306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:02:15,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 02:02:15,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-11-21 02:02:15,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552452884] [2021-11-21 02:02:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:02:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 02:02:15,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:02:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 02:02:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-21 02:02:15,279 INFO L87 Difference]: Start difference. First operand 161 states and 219 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 02:02:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:15,478 INFO L93 Difference]: Finished difference Result 228 states and 316 transitions. [2021-11-21 02:02:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 02:02:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-11-21 02:02:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:15,480 INFO L225 Difference]: With dead ends: 228 [2021-11-21 02:02:15,481 INFO L226 Difference]: Without dead ends: 158 [2021-11-21 02:02:15,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-21 02:02:15,482 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:15,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 174 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 02:02:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-21 02:02:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-21 02:02:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 103 states have (on average 1.203883495145631) internal successors, (124), 111 states have internal predecessors, (124), 33 states have call successors, (33), 15 states have call predecessors, (33), 21 states have return successors, (52), 31 states have call predecessors, (52), 32 states have call successors, (52) [2021-11-21 02:02:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 209 transitions. [2021-11-21 02:02:15,531 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 209 transitions. Word has length 52 [2021-11-21 02:02:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:15,531 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 209 transitions. [2021-11-21 02:02:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 02:02:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 209 transitions. [2021-11-21 02:02:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 02:02:15,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:15,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:15,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:15,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 02:02:15,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:02:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -825825266, now seen corresponding path program 1 times [2021-11-21 02:02:15,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:02:15,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755641741] [2021-11-21 02:02:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:15,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:02:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:02:15,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:02:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755641741] [2021-11-21 02:02:15,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755641741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:02:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455630873] [2021-11-21 02:02:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:15,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:15,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:02:15,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:02:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 02:02:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:02:16,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:02:16,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 02:02:16,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455630873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:02:16,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 02:02:16,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-21 02:02:16,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219378688] [2021-11-21 02:02:16,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:02:16,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 02:02:16,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:02:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 02:02:16,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-21 02:02:16,254 INFO L87 Difference]: Start difference. First operand 158 states and 209 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) [2021-11-21 02:02:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:16,496 INFO L93 Difference]: Finished difference Result 228 states and 315 transitions. [2021-11-21 02:02:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 02:02:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2021-11-21 02:02:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:16,499 INFO L225 Difference]: With dead ends: 228 [2021-11-21 02:02:16,499 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 02:02:16,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-21 02:02:16,501 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:16,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 211 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 02:02:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 02:02:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2021-11-21 02:02:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 100 states have (on average 1.19) internal successors, (119), 107 states have internal predecessors, (119), 33 states have call successors, (33), 15 states have call predecessors, (33), 20 states have return successors, (46), 31 states have call predecessors, (46), 32 states have call successors, (46) [2021-11-21 02:02:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2021-11-21 02:02:16,550 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 56 [2021-11-21 02:02:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:16,551 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2021-11-21 02:02:16,551 INFO L471 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) [2021-11-21 02:02:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2021-11-21 02:02:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 02:02:16,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:16,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:16,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 02:02:16,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:16,767 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:02:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:16,768 INFO L85 PathProgramCache]: Analyzing trace with hash 583158517, now seen corresponding path program 1 times [2021-11-21 02:02:16,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:02:16,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902338729] [2021-11-21 02:02:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:16,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:02:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 02:02:16,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:02:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902338729] [2021-11-21 02:02:16,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902338729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:02:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701091337] [2021-11-21 02:02:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:16,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:16,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:02:16,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:02:16,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 02:02:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-21 02:02:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:17,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:17,179 INFO L388 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 27 treesize of output 15 [2021-11-21 02:02:17,226 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-21 02:02:17,226 INFO L388 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 102 treesize of output 89 [2021-11-21 02:02:17,261 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-21 02:02:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 70 [2021-11-21 02:02:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 02:02:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 02:02:24,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701091337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:24,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753207136] [2021-11-21 02:02:24,146 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 02:02:24,147 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:02:24,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:02:24,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:02:24,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:02:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:24,248 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:02:24,248 INFO L388 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 [2021-11-21 02:02:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:24,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 02:02:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,282 INFO L388 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 [2021-11-21 02:02:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,417 INFO L388 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 [2021-11-21 02:02:26,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,493 INFO L388 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 [2021-11-21 02:02:26,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,568 INFO L388 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 [2021-11-21 02:02:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,818 INFO L354 Elim1Store]: treesize reduction 82, result has 35.9 percent of original size [2021-11-21 02:02:26,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 02:02:26,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:26,922 INFO L388 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 [2021-11-21 02:02:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,090 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 02:02:27,090 INFO L388 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 [2021-11-21 02:02:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,210 INFO L388 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 [2021-11-21 02:02:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,311 INFO L388 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 [2021-11-21 02:02:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:27,443 INFO L388 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 [2021-11-21 02:02:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:27,966 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 02:02:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 02:02:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:02:28,196 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 02:02:28,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 503 treesize of output 519 [2021-11-21 02:02:28,462 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 02:02:28,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 552 treesize of output 633 [2021-11-21 02:02:28,840 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 02:02:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 633 treesize of output 723 [2021-11-21 02:02:28,935 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 02:02:28,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 02:02:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:28,957 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 02:02:29,017 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:02:29,018 INFO L388 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 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 02:02:41,219 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:02:41,219 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 02:02:41,262 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:02:41,263 INFO L388 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 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 02:02:41,294 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 02:02:41,294 INFO L388 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 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 02:02:41,328 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:02:41,328 INFO L388 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 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 02:02:41,370 INFO L388 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 [2021-11-21 02:02:41,569 INFO L388 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 [2021-11-21 02:02:41,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:41,620 INFO L388 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 [2021-11-21 02:02:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:41,656 INFO L388 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 [2021-11-21 02:02:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:41,701 INFO L388 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 [2021-11-21 02:02:41,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:41,712 INFO L388 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 [2021-11-21 02:02:45,360 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-21 02:02:52,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:02:52,371 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:02:52,493 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:02:53,108 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:02:55,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [753207136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 02:02:55,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:02:55,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 21, 6] total 48 [2021-11-21 02:02:55,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824955580] [2021-11-21 02:02:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:02:55,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 02:02:55,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:02:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 02:02:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2074, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 02:02:55,818 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 02:02:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:56,931 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2021-11-21 02:02:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 02:02:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2021-11-21 02:02:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:56,933 INFO L225 Difference]: With dead ends: 209 [2021-11-21 02:02:56,933 INFO L226 Difference]: Without dead ends: 154 [2021-11-21 02:02:56,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 02:02:56,936 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:56,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 157 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 277 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2021-11-21 02:02:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-21 02:02:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-21 02:02:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 100 states have (on average 1.18) internal successors, (118), 107 states have internal predecessors, (118), 33 states have call successors, (33), 15 states have call predecessors, (33), 20 states have return successors, (46), 31 states have call predecessors, (46), 32 states have call successors, (46) [2021-11-21 02:02:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 197 transitions. [2021-11-21 02:02:56,983 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 197 transitions. Word has length 60 [2021-11-21 02:02:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:56,984 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 197 transitions. [2021-11-21 02:02:56,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 02:02:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 197 transitions. [2021-11-21 02:02:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 02:02:56,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:56,986 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:57,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:57,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 02:02:57,205 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:02:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 808212643, now seen corresponding path program 1 times [2021-11-21 02:02:57,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:02:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211689590] [2021-11-21 02:02:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:57,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:02:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 02:02:57,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:02:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211689590] [2021-11-21 02:02:57,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211689590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:02:57,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928662819] [2021-11-21 02:02:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:02:57,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:57,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:02:57,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:02:57,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 02:02:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:02:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 02:02:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:02:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 02:02:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928662819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308466197] [2021-11-21 02:02:57,975 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:02:57,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:02:57,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:02:57,976 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:02:57,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:02:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:58,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:58,083 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:02:58,084 INFO L388 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 [2021-11-21 02:02:58,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:02:58,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 02:03:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,399 INFO L388 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 [2021-11-21 02:03:00,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,529 INFO L388 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 [2021-11-21 02:03:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,612 INFO L388 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 [2021-11-21 02:03:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,676 INFO L388 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 [2021-11-21 02:03:00,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:00,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:00,896 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 02:03:00,897 INFO L388 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 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 02:03:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,024 INFO L388 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 [2021-11-21 02:03:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,111 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 02:03:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 02:03:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,279 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 02:03:01,279 INFO L388 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 [2021-11-21 02:03:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,383 INFO L388 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 [2021-11-21 02:03:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,441 INFO L388 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 [2021-11-21 02:03:01,492 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 02:03:01,493 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 02:03:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:01,825 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 02:03:01,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 02:03:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:02,056 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-21 02:03:02,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 485 treesize of output 507 [2021-11-21 02:03:02,141 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 02:03:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 552 treesize of output 523 [2021-11-21 02:03:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:02,158 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 520 treesize of output 507 [2021-11-21 02:03:02,400 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 02:03:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 501 treesize of output 582 [2021-11-21 02:03:02,722 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 02:03:02,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 582 treesize of output 672 [2021-11-21 02:03:02,784 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:03:02,785 INFO L388 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 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 02:03:14,348 INFO L388 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 [2021-11-21 02:03:14,371 INFO L388 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 [2021-11-21 02:03:14,422 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:03:14,423 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 02:03:14,458 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:03:14,459 INFO L388 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 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 02:03:14,501 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:03:14,501 INFO L388 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 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 02:03:14,524 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 02:03:14,524 INFO L388 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 02:03:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:14,740 INFO L388 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 [2021-11-21 02:03:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:14,780 INFO L388 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 [2021-11-21 02:03:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:14,801 INFO L388 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 [2021-11-21 02:03:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:14,872 INFO L388 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 [2021-11-21 02:03:21,318 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2021-11-21 02:03:21,622 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 02:03:28,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:03:28,928 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:03:29,028 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:03:29,608 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:03:34,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:03:34,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:03:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2021-11-21 02:03:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035552977] [2021-11-21 02:03:34,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 02:03:34,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 02:03:34,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:03:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 02:03:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 02:03:34,226 INFO L87 Difference]: Start difference. First operand 154 states and 197 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 02:03:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:03:34,498 INFO L93 Difference]: Finished difference Result 220 states and 302 transitions. [2021-11-21 02:03:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 02:03:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2021-11-21 02:03:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:03:34,501 INFO L225 Difference]: With dead ends: 220 [2021-11-21 02:03:34,501 INFO L226 Difference]: Without dead ends: 162 [2021-11-21 02:03:34,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 02:03:34,504 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:03:34,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 569 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 02:03:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-21 02:03:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-11-21 02:03:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 110 states have internal predecessors, (119), 33 states have call successors, (33), 15 states have call predecessors, (33), 21 states have return successors, (51), 31 states have call predecessors, (51), 32 states have call successors, (51) [2021-11-21 02:03:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2021-11-21 02:03:34,546 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 63 [2021-11-21 02:03:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:03:34,547 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2021-11-21 02:03:34,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 02:03:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2021-11-21 02:03:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 02:03:34,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:03:34,549 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:03:34,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 02:03:34,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 02:03:34,770 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:03:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:03:34,771 INFO L85 PathProgramCache]: Analyzing trace with hash 850706141, now seen corresponding path program 1 times [2021-11-21 02:03:34,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:03:34,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630385270] [2021-11-21 02:03:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:03:34,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:03:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:03:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:03:34,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:03:34,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630385270] [2021-11-21 02:03:34,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630385270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:03:34,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437788775] [2021-11-21 02:03:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:03:34,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:03:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:03:34,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:03:34,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 02:03:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:03:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 02:03:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:35,127 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:03:35,128 INFO L388 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 63 treesize of output 50 [2021-11-21 02:03:35,151 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 02:03:35,151 INFO L388 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 71 treesize of output 54 [2021-11-21 02:03:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:03:52,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 02:03:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437788775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887147408] [2021-11-21 02:03:53,732 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:03:53,732 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:03:53,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:03:53,733 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:03:53,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:03:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:53,823 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:03:53,823 INFO L388 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 [2021-11-21 02:03:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:53,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 02:03:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,267 INFO L388 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 [2021-11-21 02:03:56,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,309 INFO L388 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 [2021-11-21 02:03:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,393 INFO L388 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 [2021-11-21 02:03:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,476 INFO L388 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 [2021-11-21 02:03:56,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,824 INFO L388 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 [2021-11-21 02:03:56,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:56,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:56,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:56,924 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 02:03:56,924 INFO L388 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 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 02:03:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:57,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:57,040 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 02:03:57,040 INFO L388 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 [2021-11-21 02:03:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,189 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 02:03:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 02:03:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,361 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 02:03:57,361 INFO L388 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 [2021-11-21 02:03:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,494 INFO L388 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 [2021-11-21 02:03:57,550 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 02:03:57,551 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 02:03:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:57,917 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 02:03:57,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 02:03:58,206 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 02:03:58,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 503 treesize of output 584 [2021-11-21 02:03:58,617 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 02:03:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 584 treesize of output 674 [2021-11-21 02:03:58,718 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 02:03:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 668 treesize of output 651 [2021-11-21 02:03:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,742 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 648 treesize of output 635 [2021-11-21 02:03:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:03:58,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:03:59,004 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 02:03:59,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 629 treesize of output 645 [2021-11-21 02:03:59,074 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:03:59,075 INFO L388 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 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 02:04:11,102 INFO L388 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 [2021-11-21 02:04:11,195 INFO L388 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 [2021-11-21 02:04:11,286 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:04:11,286 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 02:04:11,323 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:04:11,324 INFO L388 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 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 02:04:11,371 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 02:04:11,372 INFO L388 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 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 02:04:11,395 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 02:04:11,395 INFO L388 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 02:04:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:11,471 INFO L388 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 [2021-11-21 02:04:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:11,530 INFO L388 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 [2021-11-21 02:04:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:11,591 INFO L388 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 [2021-11-21 02:04:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:11,646 INFO L388 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 [2021-11-21 02:04:18,592 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2021-11-21 02:04:18,872 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 02:04:26,281 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:04:26,316 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:04:26,423 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:04:26,991 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:04:39,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:04:39,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:04:39,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 14] total 36 [2021-11-21 02:04:39,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653832147] [2021-11-21 02:04:39,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 02:04:39,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 02:04:39,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:04:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 02:04:39,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3724, Unknown=7, NotChecked=0, Total=4032 [2021-11-21 02:04:39,606 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 02:04:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:04:44,754 INFO L93 Difference]: Finished difference Result 295 states and 420 transitions. [2021-11-21 02:04:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 02:04:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) Word has length 65 [2021-11-21 02:04:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:04:44,758 INFO L225 Difference]: With dead ends: 295 [2021-11-21 02:04:44,758 INFO L226 Difference]: Without dead ends: 220 [2021-11-21 02:04:44,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=535, Invalid=7466, Unknown=9, NotChecked=0, Total=8010 [2021-11-21 02:04:44,762 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 112 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 02:04:44,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 907 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 664 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2021-11-21 02:04:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-21 02:04:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 176. [2021-11-21 02:04:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 116 states have (on average 1.146551724137931) internal successors, (133), 123 states have internal predecessors, (133), 35 states have call successors, (35), 19 states have call predecessors, (35), 24 states have return successors, (43), 33 states have call predecessors, (43), 34 states have call successors, (43) [2021-11-21 02:04:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 211 transitions. [2021-11-21 02:04:44,827 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 211 transitions. Word has length 65 [2021-11-21 02:04:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:04:44,828 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 211 transitions. [2021-11-21 02:04:44,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 02:04:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 211 transitions. [2021-11-21 02:04:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 02:04:44,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:04:44,830 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:04:44,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 02:04:45,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:04:45,058 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:04:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:04:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash -812384439, now seen corresponding path program 1 times [2021-11-21 02:04:45,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:04:45,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475615087] [2021-11-21 02:04:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:04:45,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:04:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:04:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 02:04:45,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:04:45,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475615087] [2021-11-21 02:04:45,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475615087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:04:45,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40441849] [2021-11-21 02:04:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:04:45,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:04:45,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:04:45,504 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:04:45,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 02:04:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:04:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-21 02:04:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:04:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:45,823 INFO L388 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 27 treesize of output 15 [2021-11-21 02:04:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:45,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:45,895 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-21 02:04:45,895 INFO L388 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 4 case distinctions, treesize of input 53 treesize of output 48 [2021-11-21 02:04:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:04:48,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:04:55,339 INFO L388 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 13258 treesize of output 13130 [2021-11-21 02:04:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:04:56,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40441849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:04:56,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125856092] [2021-11-21 02:04:56,995 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:04:56,995 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:04:56,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:04:56,996 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:04:56,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:04:57,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:57,098 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 02:04:57,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 02:04:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:57,214 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:04:57,215 INFO L388 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 [2021-11-21 02:04:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,238 INFO L388 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 [2021-11-21 02:04:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,367 INFO L388 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 [2021-11-21 02:04:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,456 INFO L388 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 [2021-11-21 02:04:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,500 INFO L388 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 [2021-11-21 02:04:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:59,702 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 02:04:59,702 INFO L388 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 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 02:04:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,783 INFO L388 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 [2021-11-21 02:04:59,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,867 INFO L388 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 [2021-11-21 02:04:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:04:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:04:59,965 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 02:04:59,966 INFO L388 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 [2021-11-21 02:05:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,201 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 02:05:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 02:05:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,338 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 02:05:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 02:05:00,488 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:05:00,489 INFO L388 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 02:05:00,516 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 02:05:00,517 INFO L388 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 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-21 02:05:00,574 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:05:00,574 INFO L388 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 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 02:05:00,611 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 02:05:00,612 INFO L388 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 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 02:05:00,785 INFO L388 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 [2021-11-21 02:05:00,850 INFO L388 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 [2021-11-21 02:05:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:00,921 INFO L388 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 [2021-11-21 02:05:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:01,003 INFO L388 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 [2021-11-21 02:05:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:01,041 INFO L388 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 [2021-11-21 02:05:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:05:01,085 INFO L388 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 [2021-11-21 02:05:09,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2021-11-21 02:05:09,663 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 21 for LOIs [2021-11-21 02:05:16,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:05:16,212 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:05:16,352 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:05:16,927 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:05:23,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:05:23,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:05:23,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2021-11-21 02:05:23,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994774967] [2021-11-21 02:05:23,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 02:05:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 02:05:23,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:05:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 02:05:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3297, Unknown=3, NotChecked=0, Total=3540 [2021-11-21 02:05:23,734 INFO L87 Difference]: Start difference. First operand 176 states and 211 transitions. Second operand has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-21 02:05:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:05:26,930 INFO L93 Difference]: Finished difference Result 327 states and 439 transitions. [2021-11-21 02:05:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 02:05:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 68 [2021-11-21 02:05:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:05:26,934 INFO L225 Difference]: With dead ends: 327 [2021-11-21 02:05:26,934 INFO L226 Difference]: Without dead ends: 253 [2021-11-21 02:05:26,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=358, Invalid=4609, Unknown=3, NotChecked=0, Total=4970 [2021-11-21 02:05:26,936 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 182 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 02:05:26,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 875 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1049 Invalid, 0 Unknown, 547 Unchecked, 1.1s Time] [2021-11-21 02:05:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-21 02:05:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 218. [2021-11-21 02:05:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 142 states have (on average 1.1549295774647887) internal successors, (164), 150 states have internal predecessors, (164), 49 states have call successors, (49), 21 states have call predecessors, (49), 26 states have return successors, (65), 46 states have call predecessors, (65), 48 states have call successors, (65) [2021-11-21 02:05:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 278 transitions. [2021-11-21 02:05:27,004 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 278 transitions. Word has length 68 [2021-11-21 02:05:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:05:27,004 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 278 transitions. [2021-11-21 02:05:27,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-21 02:05:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 278 transitions. [2021-11-21 02:05:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 02:05:27,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:05:27,006 INFO L514 BasicCegarLoop]: 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] [2021-11-21 02:05:27,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 02:05:27,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 02:05:27,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:05:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:05:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1822501617, now seen corresponding path program 1 times [2021-11-21 02:05:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:05:27,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741619114] [2021-11-21 02:05:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:05:27,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:05:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:05:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 02:05:27,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:05:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741619114] [2021-11-21 02:05:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741619114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:05:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080987269] [2021-11-21 02:05:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:05:27,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:05:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:05:27,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:05:27,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 02:05:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:05:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-21 02:05:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:05:28,328 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 02:05:28,328 INFO L388 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 63 treesize of output 50 [2021-11-21 02:05:28,360 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 02:05:28,360 INFO L388 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 71 treesize of output 54 [2021-11-21 02:05:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:05:51,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:06:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:06:15,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080987269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:06:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683395105] [2021-11-21 02:06:15,504 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:06:15,505 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:06:15,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:06:15,505 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:06:15,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:06:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:15,609 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 02:06:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 02:06:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:15,772 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:06:15,772 INFO L388 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 [2021-11-21 02:06:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,903 INFO L388 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 [2021-11-21 02:06:17,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,000 INFO L388 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 [2021-11-21 02:06:18,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,054 INFO L388 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 [2021-11-21 02:06:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,129 INFO L388 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 [2021-11-21 02:06:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,272 INFO L388 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 [2021-11-21 02:06:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,466 INFO L388 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 [2021-11-21 02:06:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,523 INFO L388 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 [2021-11-21 02:06:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:06:18,572 INFO L388 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 [2021-11-21 02:06:47,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 135 for LOIs [2021-11-21 02:06:49,476 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 02:06:55,681 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 02:06:55,720 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 02:06:55,821 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 02:06:56,375 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:07:23,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:07:23,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:07:23,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31, 15] total 59 [2021-11-21 02:07:23,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106029261] [2021-11-21 02:07:23,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 02:07:23,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-21 02:07:23,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:07:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-21 02:07:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=6933, Unknown=8, NotChecked=0, Total=7482 [2021-11-21 02:07:23,933 INFO L87 Difference]: Start difference. First operand 218 states and 278 transitions. Second operand has 59 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 19 states have call successors, (30), 5 states have call predecessors, (30), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-21 02:07:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:07:44,935 INFO L93 Difference]: Finished difference Result 327 states and 458 transitions. [2021-11-21 02:07:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-21 02:07:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 19 states have call successors, (30), 5 states have call predecessors, (30), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) Word has length 67 [2021-11-21 02:07:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:07:44,938 INFO L225 Difference]: With dead ends: 327 [2021-11-21 02:07:44,938 INFO L226 Difference]: Without dead ends: 269 [2021-11-21 02:07:44,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 136 SyntacticMatches, 9 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4505 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=948, Invalid=12151, Unknown=11, NotChecked=0, Total=13110 [2021-11-21 02:07:44,942 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 43 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 02:07:44,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1147 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 822 Invalid, 0 Unknown, 1149 Unchecked, 0.9s Time] [2021-11-21 02:07:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-21 02:07:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 245. [2021-11-21 02:07:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 171 states have internal predecessors, (184), 52 states have call successors, (52), 24 states have call predecessors, (52), 31 states have return successors, (73), 49 states have call predecessors, (73), 51 states have call successors, (73) [2021-11-21 02:07:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 309 transitions. [2021-11-21 02:07:45,009 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 309 transitions. Word has length 67 [2021-11-21 02:07:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:07:45,010 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 309 transitions. [2021-11-21 02:07:45,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 19 states have call successors, (30), 5 states have call predecessors, (30), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-21 02:07:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 309 transitions. [2021-11-21 02:07:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 02:07:45,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:07:45,011 INFO L514 BasicCegarLoop]: 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] [2021-11-21 02:07:45,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 02:07:45,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 02:07:45,212 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:07:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:07:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1322446601, now seen corresponding path program 1 times [2021-11-21 02:07:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:07:45,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928639239] [2021-11-21 02:07:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:07:45,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:07:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:07:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 02:07:45,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:07:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928639239] [2021-11-21 02:07:45,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928639239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 02:07:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521384714] [2021-11-21 02:07:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:07:45,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:07:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:07:45,500 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:07:45,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb6705-e7e2-4e68-ad59-a4fa4f310c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 02:07:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:07:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 02:07:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:07:45,786 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-21 02:07:45,786 INFO L388 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 33 treesize of output 29 [2021-11-21 02:07:59,847 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:08:16,267 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:08:25,490 WARN L227 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:08:32,698 WARN L227 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:08:40,796 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:08:51,053 WARN L227 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:09:01,142 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:09:15,706 WARN L227 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 33 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:09:22,135 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:09:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 02:09:23,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:48,717 INFO L388 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 177 treesize of output 169 [2021-11-21 02:09:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 02:09:48,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521384714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240735813] [2021-11-21 02:09:48,860 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 02:09:48,861 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:09:48,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:09:48,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:09:48,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:09:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:48,973 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 02:09:48,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 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 [2021-11-21 02:09:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:49,128 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 02:09:49,128 INFO L388 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 [2021-11-21 02:09:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,029 INFO L388 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 [2021-11-21 02:09:51,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,098 INFO L388 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 [2021-11-21 02:09:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,304 INFO L388 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 [2021-11-21 02:09:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,372 INFO L388 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 [2021-11-21 02:09:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,543 INFO L388 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 [2021-11-21 02:09:51,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,602 INFO L388 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 [2021-11-21 02:09:51,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,774 INFO L388 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 [2021-11-21 02:09:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:51,877 INFO L388 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