./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:54:33,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:54:33,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:54:33,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:54:33,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:54:33,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:54:33,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:54:33,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:54:33,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:54:33,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:54:33,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:54:33,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:54:33,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:54:33,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:54:33,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:54:33,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:54:33,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:54:33,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:54:33,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:54:33,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:54:33,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:54:33,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:54:33,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:54:33,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:54:33,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:54:33,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:54:33,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:54:33,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:54:33,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:54:33,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:54:33,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:54:33,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:54:33,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:54:33,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:54:33,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:54:33,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:54:33,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:54:33,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:54:33,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:54:33,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:54:33,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:54:33,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:54:33,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:54:33,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:54:33,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:54:33,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:54:33,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:54:33,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:54:33,771 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:54:33,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:54:33,771 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:54:33,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:54:33,773 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:54:33,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:54:33,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:54:33,774 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:54:33,774 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:54:33,774 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:54:33,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:54:33,775 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:54:33,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:54:33,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:54:33,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:54:33,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:54:33,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:54:33,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:54:33,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:54:33,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:54:33,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:54:33,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:54:33,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:54:33,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:33,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:54:33,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:54:33,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:54:33,782 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:54:33,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:54:33,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:54:33,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:54:33,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:54:33,784 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_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-11-25 18:54:34,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:54:34,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:54:34,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:54:34,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:54:34,062 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:54:34,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-25 18:54:34,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/data/37f493dd9/d36b8aa394d64865b35df9dcf297c32d/FLAGc259763c1 [2021-11-25 18:54:34,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:54:34,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-25 18:54:34,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/data/37f493dd9/d36b8aa394d64865b35df9dcf297c32d/FLAGc259763c1 [2021-11-25 18:54:34,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/data/37f493dd9/d36b8aa394d64865b35df9dcf297c32d [2021-11-25 18:54:34,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:54:34,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:54:34,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:34,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:54:34,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:54:35,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:34" (1/1) ... [2021-11-25 18:54:35,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318dcacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:35, skipping insertion in model container [2021-11-25 18:54:35,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:34" (1/1) ... [2021-11-25 18:54:35,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:54:35,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:54:35,404 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_cf21ff2f-b496-47e0-b06f-4413624ce581/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-11-25 18:54:35,410 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_cf21ff2f-b496-47e0-b06f-4413624ce581/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-11-25 18:54:36,262 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,264 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,266 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,291 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,293 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,298 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,299 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,302 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:36,720 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:54:36,722 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:54:36,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:54:36,725 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:54:36,727 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:54:36,727 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:54:36,728 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:54:36,729 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:54:36,730 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:54:36,731 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:54:36,945 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:54:36,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:37,045 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:54:37,071 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_cf21ff2f-b496-47e0-b06f-4413624ce581/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-11-25 18:54:37,077 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_cf21ff2f-b496-47e0-b06f-4413624ce581/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-11-25 18:54:37,147 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,158 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,159 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,160 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,163 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,171 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:54:37,234 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:54:37,236 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:54:37,237 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:54:37,238 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:54:37,246 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:54:37,247 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:54:37,247 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:54:37,248 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:54:37,248 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:54:37,249 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:54:37,285 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:54:37,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:37,592 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:54:37,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37 WrapperNode [2021-11-25 18:54:37,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:37,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:37,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:54:37,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:54:37,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,764 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-11-25 18:54:37,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:37,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:54:37,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:54:37,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:54:37,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:54:37,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:54:37,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:54:37,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:54:37,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (1/1) ... [2021-11-25 18:54:37,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:37,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:54:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:54:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:54:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:54:37,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:54:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-25 18:54:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-25 18:54:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:54:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-25 18:54:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-25 18:54:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:54:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:54:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:54:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:54:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:54:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:54:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:54:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:54:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:54:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:54:37,945 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:54:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:54:38,185 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:54:38,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:54:38,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:54:38,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:54:38,664 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:54:38,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:38 BoogieIcfgContainer [2021-11-25 18:54:38,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:54:38,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:54:38,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:54:38,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:54:38,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:54:34" (1/3) ... [2021-11-25 18:54:38,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eccb1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:38, skipping insertion in model container [2021-11-25 18:54:38,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:37" (2/3) ... [2021-11-25 18:54:38,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eccb1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:38, skipping insertion in model container [2021-11-25 18:54:38,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:38" (3/3) ... [2021-11-25 18:54:38,677 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-11-25 18:54:38,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:54:38,690 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:54:38,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:54:38,787 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 [2021-11-25 18:54:38,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:54:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 18:54:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:54:38,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:38,824 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] [2021-11-25 18:54:38,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2021-11-25 18:54:38,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:38,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069080871] [2021-11-25 18:54:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:38,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:54:39,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:39,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069080871] [2021-11-25 18:54:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069080871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:39,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917417882] [2021-11-25 18:54:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:39,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:39,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:39,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:54:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:39,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-25 18:54:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,015 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 [2021-11-25 18:54:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,063 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 [2021-11-25 18:54:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,237 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 [2021-11-25 18:54:40,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:40,275 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 [2021-11-25 18:54:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:54:44,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:54:44,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917417882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:44,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:54:44,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-25 18:54:44,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676597011] [2021-11-25 18:54:44,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:44,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:54:44,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:54:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:54:44,041 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 18:54:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:44,466 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2021-11-25 18:54:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:54:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2021-11-25 18:54:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:44,479 INFO L225 Difference]: With dead ends: 110 [2021-11-25 18:54:44,479 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 18:54:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:54:44,486 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:44,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 382 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2021-11-25 18:54:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 18:54:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-11-25 18:54:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-25 18:54:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-11-25 18:54:44,541 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 37 [2021-11-25 18:54:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:44,542 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-11-25 18:54:44,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 18:54:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-11-25 18:54:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 18:54:44,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:44,546 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] [2021-11-25 18:54:44,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:44,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:44,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2021-11-25 18:54:44,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014108601] [2021-11-25 18:54:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:44,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:54:44,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014108601] [2021-11-25 18:54:44,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014108601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238249075] [2021-11-25 18:54:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:44,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:44,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:44,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:54:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:45,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-25 18:54:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:45,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,277 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 [2021-11-25 18:54:45,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,297 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 [2021-11-25 18:54:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,381 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:54:45,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-25 18:54:45,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,415 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:54:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-25 18:54:45,546 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-11-25 18:54:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 110 [2021-11-25 18:54:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-25 18:54:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2021-11-25 18:54:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2021-11-25 18:54:45,611 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 14 treesize of output 13 [2021-11-25 18:54:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-25 18:54:45,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:54:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:54:48,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:56,705 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24)) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))))))) is different from false [2021-11-25 18:54:58,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_212 Int)) (or (= v_ArrVal_212 0) (and (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse0 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse1 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse1 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse2 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse2 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse3 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse3 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24)) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse5 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse5 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24)) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse7 (store |c_#memory_$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_ArrVal_212)))) (store (store .cse7 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0))) (<= |c_#StackHeapBarrier| v_ArrVal_212))) is different from false [2021-11-25 18:54:59,311 INFO L354 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-11-25 18:54:59,312 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 500 treesize of output 385 [2021-11-25 18:54:59,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 885 treesize of output 857 [2021-11-25 18:54:59,458 INFO L354 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-11-25 18:54:59,458 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 857 treesize of output 741 [2021-11-25 18:54:59,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1503 treesize of output 1463 [2021-11-25 18:54:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1660 treesize of output 1656 [2021-11-25 18:54:59,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1656 treesize of output 1654 [2021-11-25 18:54:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1680 treesize of output 1676 [2021-11-25 18:54:59,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1710 treesize of output 1702 [2021-11-25 18:54:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1702 treesize of output 1700 [2021-11-25 18:54:59,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1700 treesize of output 1696 [2021-11-25 18:54:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1696 treesize of output 1688 [2021-11-25 18:54:59,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1756 treesize of output 1740 [2021-11-25 18:54:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1772 treesize of output 1764 [2021-11-25 18:54:59,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1764 treesize of output 1760 [2021-11-25 18:55:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1824 treesize of output 1808 [2021-11-25 18:55:00,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1808 treesize of output 1800 [2021-11-25 18:55:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1800 treesize of output 1792 [2021-11-25 18:55:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1856 treesize of output 1840 [2021-11-25 18:55:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1840 treesize of output 1832 [2021-11-25 18:55:00,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1896 treesize of output 1880 [2021-11-25 18:55:01,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-25 18:55:01,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:55:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:01,729 INFO L354 Elim1Store]: treesize reduction 82, result has 58.4 percent of original size [2021-11-25 18:55:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 210 treesize of output 300 [2021-11-25 18:55:02,161 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 18:55:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 35 [2021-11-25 18:55:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2021-11-25 18:55:02,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238249075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:02,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334724596] [2021-11-25 18:55:02,332 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:55:02,332 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:02,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:55:02,343 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:55:02,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:55:02,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,481 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 18:55:02,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 18:55:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,580 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 18:55:02,581 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 [2021-11-25 18:55:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:02,989 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 [2021-11-25 18:55:03,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,016 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 [2021-11-25 18:55:03,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,044 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 [2021-11-25 18:55:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,072 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 [2021-11-25 18:55:03,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:03,177 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:55:03,177 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 [2021-11-25 18:55:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,209 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 [2021-11-25 18:55:03,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,339 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 18:55:03,339 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 [2021-11-25 18:55:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,379 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 [2021-11-25 18:55:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2021-11-25 18:55:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:03,447 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 [2021-11-25 18:55:03,529 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 [2021-11-25 18:55:03,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,549 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 [2021-11-25 18:55:03,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:03,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2021-11-25 18:55:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,596 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 71 treesize of output 19 [2021-11-25 18:55:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2021-11-25 18:55:03,643 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 [2021-11-25 18:55:03,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,710 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 [2021-11-25 18:55:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,733 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 59 treesize of output 13 [2021-11-25 18:55:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2021-11-25 18:55:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,767 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 53 treesize of output 23 [2021-11-25 18:55:03,781 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 [2021-11-25 18:55:03,793 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 [2021-11-25 18:55:03,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,837 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 [2021-11-25 18:55:03,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,847 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 [2021-11-25 18:55:03,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,872 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 [2021-11-25 18:55:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:03,884 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 [2021-11-25 18:55:04,528 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 55 for LOIs [2021-11-25 18:55:04,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2021-11-25 18:55:04,859 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 18:55:04,884 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:55:07,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1334724596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:07,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:07,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2021-11-25 18:55:07,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211819499] [2021-11-25 18:55:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:07,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:55:07,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:55:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2021-11-25 18:55:07,738 INFO L87 Difference]: Start difference. First operand 57 states and 77 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) [2021-11-25 18:55:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:08,208 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2021-11-25 18:55:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:55:08,209 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 [2021-11-25 18:55:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:08,210 INFO L225 Difference]: With dead ends: 103 [2021-11-25 18:55:08,210 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:55:08,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=108, Invalid=828, Unknown=2, NotChecked=118, Total=1056 [2021-11-25 18:55:08,213 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:08,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 286 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-11-25 18:55:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:55:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-25 18:55:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 18:55:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-11-25 18:55:08,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2021-11-25 18:55:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:08,225 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-11-25 18:55:08,225 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) [2021-11-25 18:55:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-11-25 18:55:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:55:08,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:08,227 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] [2021-11-25 18:55:08,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:55:08,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:08,441 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2021-11-25 18:55:08,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669189134] [2021-11-25 18:55:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:08,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:08,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:08,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669189134] [2021-11-25 18:55:08,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669189134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:08,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829098954] [2021-11-25 18:55:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:08,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:08,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:08,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:08,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:55:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:55:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:55:08,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:08,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829098954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:08,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:08,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 18:55:08,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937429914] [2021-11-25 18:55:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:08,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:55:08,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:55:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:55:08,819 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:55:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:08,934 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-11-25 18:55:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:55:08,939 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 [2021-11-25 18:55:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:08,940 INFO L225 Difference]: With dead ends: 86 [2021-11-25 18:55:08,940 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 18:55:08,941 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 [2021-11-25 18:55:08,942 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 147 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 [2021-11-25 18:55:08,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 147 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:55:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 18:55:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-25 18:55:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-25 18:55:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-11-25 18:55:08,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2021-11-25 18:55:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:08,954 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-11-25 18:55:08,954 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) [2021-11-25 18:55:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-11-25 18:55:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 18:55:08,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:08,956 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] [2021-11-25 18:55:08,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:09,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:09,169 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2021-11-25 18:55:09,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951414410] [2021-11-25 18:55:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:09,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:09,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951414410] [2021-11-25 18:55:09,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951414410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468499568] [2021-11-25 18:55:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:09,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:09,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:09,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:55:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:55:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:55:09,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468499568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:09,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-25 18:55:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36088805] [2021-11-25 18:55:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:55:09,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:55:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:55:09,603 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:55:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:09,801 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2021-11-25 18:55:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:55:09,802 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 [2021-11-25 18:55:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:09,803 INFO L225 Difference]: With dead ends: 103 [2021-11-25 18:55:09,804 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 18:55:09,805 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 [2021-11-25 18:55:09,806 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 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 [2021-11-25 18:55:09,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:55:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 18:55:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-25 18:55:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-25 18:55:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2021-11-25 18:55:09,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2021-11-25 18:55:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:09,820 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2021-11-25 18:55:09,821 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) [2021-11-25 18:55:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2021-11-25 18:55:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:55:09,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:09,823 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] [2021-11-25 18:55:09,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:10,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:10,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2021-11-25 18:55:10,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:10,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966016004] [2021-11-25 18:55:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:10,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:10,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966016004] [2021-11-25 18:55:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966016004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982798297] [2021-11-25 18:55:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:10,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:10,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:10,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:10,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:55:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:55:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:55:10,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982798297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:10,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:10,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-25 18:55:10,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650739640] [2021-11-25 18:55:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:10,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:10,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:55:10,451 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:55:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:10,501 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2021-11-25 18:55:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:10,502 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 [2021-11-25 18:55:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:10,504 INFO L225 Difference]: With dead ends: 104 [2021-11-25 18:55:10,504 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:55:10,505 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 [2021-11-25 18:55:10,506 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 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 [2021-11-25 18:55:10,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:55:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:55:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-25 18:55:10,518 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) [2021-11-25 18:55:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-25 18:55:10,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2021-11-25 18:55:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:10,520 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-25 18:55:10,520 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) [2021-11-25 18:55:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-25 18:55:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:55:10,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:10,523 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] [2021-11-25 18:55:10,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:10,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:10,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2021-11-25 18:55:10,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:10,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179110136] [2021-11-25 18:55:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:10,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:10,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179110136] [2021-11-25 18:55:10,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179110136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536504268] [2021-11-25 18:55:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:10,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:10,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:10,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:55:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:11,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-25 18:55:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:11,152 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-11-25 18:55:11,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-11-25 18:55:11,172 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:55:11,172 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 9 treesize of output 15 [2021-11-25 18:55:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:55:11,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 18:55:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:11,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-25 18:55:11,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-25 18:55:11,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 18:55:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:55:17,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:55:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:55:22,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536504268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:22,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43602460] [2021-11-25 18:55:22,552 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-25 18:55:22,552 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:22,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:55:22,553 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:55:22,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:55:22,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,637 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 18:55:22,637 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 [2021-11-25 18:55:22,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-25 18:55:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,973 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 [2021-11-25 18:55:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:22,996 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 [2021-11-25 18:55:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,023 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 [2021-11-25 18:55:23,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,047 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 [2021-11-25 18:55:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,112 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 [2021-11-25 18:55:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,137 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 [2021-11-25 18:55:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,174 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 [2021-11-25 18:55:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:23,206 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 [2021-11-25 18:55:24,118 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 137 for LOIs [2021-11-25 18:55:24,811 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 180 for LOIs [2021-11-25 18:55:24,913 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 18:55:24,933 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 23 for LOIs [2021-11-25 18:55:25,016 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:55:30,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [43602460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:30,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:30,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2021-11-25 18:55:30,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061482663] [2021-11-25 18:55:30,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:30,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:55:30,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:55:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:55:30,114 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:55:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:30,703 INFO L93 Difference]: Finished difference Result 126 states and 173 transitions. [2021-11-25 18:55:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:55:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2021-11-25 18:55:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:30,705 INFO L225 Difference]: With dead ends: 126 [2021-11-25 18:55:30,705 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 18:55:30,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:55:30,707 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:30,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 282 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 235 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2021-11-25 18:55:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 18:55:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2021-11-25 18:55:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-25 18:55:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2021-11-25 18:55:30,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 45 [2021-11-25 18:55:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:30,738 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-11-25 18:55:30,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:55:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2021-11-25 18:55:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:55:30,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:30,752 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] [2021-11-25 18:55:30,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:30,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:55:30,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2021-11-25 18:55:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:30,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753399807] [2021-11-25 18:55:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:30,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:55:31,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:31,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753399807] [2021-11-25 18:55:31,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753399807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:31,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947063577] [2021-11-25 18:55:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:31,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:31,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:31,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:55:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:55:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:31,424 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-11-25 18:55:31,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-11-25 18:55:31,436 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:55:31,437 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 9 treesize of output 15 [2021-11-25 18:55:31,441 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 10 treesize of output 9 [2021-11-25 18:55:31,461 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 16 treesize of output 15 [2021-11-25 18:55:31,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-11-25 18:55:31,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:55:31,503 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 35 treesize of output 17 [2021-11-25 18:55:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:55:37,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:55:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:55:41,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947063577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731183367] [2021-11-25 18:55:41,670 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-25 18:55:41,670 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:41,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:55:41,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:55:41,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:55:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:41,757 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 18:55:41,757 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 [2021-11-25 18:55:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:41,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-25 18:55:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,053 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 [2021-11-25 18:55:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,075 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 [2021-11-25 18:55:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,102 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 [2021-11-25 18:55:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,135 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 [2021-11-25 18:55:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:42,215 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:55:42,216 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 [2021-11-25 18:55:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,317 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 18:55:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 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 [2021-11-25 18:55:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,342 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 [2021-11-25 18:55:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:42,408 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 [2021-11-25 18:55:42,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,440 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 [2021-11-25 18:55:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2021-11-25 18:55:42,513 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 [2021-11-25 18:55:42,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,533 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 [2021-11-25 18:55:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,555 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 47 treesize of output 13 [2021-11-25 18:55:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,569 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 41 treesize of output 23 [2021-11-25 18:55:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,589 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 71 treesize of output 19 [2021-11-25 18:55:42,600 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 [2021-11-25 18:55:42,652 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 [2021-11-25 18:55:42,661 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 [2021-11-25 18:55:42,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,677 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 [2021-11-25 18:55:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,693 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 53 treesize of output 23 [2021-11-25 18:55:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2021-11-25 18:55:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,734 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 71 treesize of output 19 [2021-11-25 18:55:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,766 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 [2021-11-25 18:55:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,778 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 [2021-11-25 18:55:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,795 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 [2021-11-25 18:55:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:42,818 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 [2021-11-25 18:55:43,730 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 55 for LOIs [2021-11-25 18:55:44,203 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2021-11-25 18:55:44,266 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 18:55:44,290 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2021-11-25 18:55:44,387 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:55:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1731183367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:48,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:48,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2021-11-25 18:55:48,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340519161] [2021-11-25 18:55:48,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:48,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:55:48,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:55:48,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:55:48,168 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:55:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:48,566 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2021-11-25 18:55:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:55:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2021-11-25 18:55:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:48,568 INFO L225 Difference]: With dead ends: 120 [2021-11-25 18:55:48,569 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:55:48,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:55:48,571 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 220 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2021-11-25 18:55:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:55:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-11-25 18:55:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-25 18:55:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-11-25 18:55:48,590 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 46 [2021-11-25 18:55:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:48,590 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-11-25 18:55:48,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:55:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-11-25 18:55:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:55:48,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:48,592 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] [2021-11-25 18:55:48,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:48,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:48,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2021-11-25 18:55:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998504771] [2021-11-25 18:55:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:48,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:48,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998504771] [2021-11-25 18:55:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998504771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929401574] [2021-11-25 18:55:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:48,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:48,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:49,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:55:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:49,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 18:55:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:55:51,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:55:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:55:51,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929401574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272986571] [2021-11-25 18:55:51,994 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-25 18:55:51,994 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:51,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:55:51,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:55:51,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:55:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,069 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 18:55:52,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 18:55:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,127 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 18:55:52,127 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 [2021-11-25 18:55:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,421 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 [2021-11-25 18:55:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,451 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 [2021-11-25 18:55:52,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,485 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 [2021-11-25 18:55:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,512 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 [2021-11-25 18:55:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,568 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 35 treesize of output 7 [2021-11-25 18:55:52,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2021-11-25 18:55:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,635 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 [2021-11-25 18:55:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:52,663 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 [2021-11-25 18:55:53,550 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 133 for LOIs [2021-11-25 18:55:54,786 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2021-11-25 18:55:54,855 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 18:55:54,875 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 18:55:54,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:55:59,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [272986571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:59,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:59,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2021-11-25 18:55:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70279965] [2021-11-25 18:55:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:55:59,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:59,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:55:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:55:59,788 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:56:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:03,193 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2021-11-25 18:56:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:56:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2021-11-25 18:56:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:03,195 INFO L225 Difference]: With dead ends: 153 [2021-11-25 18:56:03,195 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 18:56:03,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:56:03,197 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 109 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:03,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 199 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 501 Invalid, 0 Unknown, 105 Unchecked, 1.0s Time] [2021-11-25 18:56:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 18:56:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-11-25 18:56:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2021-11-25 18:56:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-11-25 18:56:03,227 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 47 [2021-11-25 18:56:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:03,227 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-11-25 18:56:03,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 18:56:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-11-25 18:56:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:56:03,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:03,229 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] [2021-11-25 18:56:03,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:03,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:03,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:56:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2021-11-25 18:56:03,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:03,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622626923] [2021-11-25 18:56:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:03,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:56:03,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622626923] [2021-11-25 18:56:03,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622626923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389228810] [2021-11-25 18:56:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:03,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:03,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:03,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf21ff2f-b496-47e0-b06f-4413624ce581/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:56:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 18:56:03,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:56:06,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:56:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:56:07,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389228810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:56:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299860093] [2021-11-25 18:56:07,108 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-25 18:56:07,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:56:07,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:56:07,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:56:07,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:56:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,182 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 18:56:07,182 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 [2021-11-25 18:56:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-25 18:56:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,472 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 [2021-11-25 18:56:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,485 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 [2021-11-25 18:56:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,505 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 [2021-11-25 18:56:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,555 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 [2021-11-25 18:56:07,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:07,641 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:56:07,642 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 [2021-11-25 18:56:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,660 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 [2021-11-25 18:56:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,678 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 [2021-11-25 18:56:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,753 INFO L354 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2021-11-25 18:56:07,754 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 5 case distinctions, treesize of input 37 treesize of output 74 [2021-11-25 18:56:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:07,813 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:56:07,813 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 [2021-11-25 18:56:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:07,903 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 18:56:07,903 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 [2021-11-25 18:56:07,911 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:56:07,912 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:56:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:08,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:08,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:08,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:08,217 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-25 18:56:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 337 treesize of output 365 [2021-11-25 18:56:08,700 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-25 18:56:08,701 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 309 treesize of output 399 [2021-11-25 18:56:09,036 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-25 18:56:09,037 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 292 treesize of output 373 [2021-11-25 18:56:09,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:09,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:09,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:09,188 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-25 18:56:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 315 treesize of output 337 [2021-11-25 18:56:09,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:09,296 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 18:56:09,296 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 1 case distinctions, treesize of input 309 treesize of output 280 [2021-11-25 18:56:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,345 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 296 treesize of output 283 [2021-11-25 18:56:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:09,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19