./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:02:12,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:02:12,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:02:12,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:02:12,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:02:12,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:02:12,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:02:12,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:02:12,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:02:12,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:02:12,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:02:12,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:02:12,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:02:12,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:02:12,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:02:12,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:02:12,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:02:12,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:02:12,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:02:12,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:02:12,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:02:12,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:02:12,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:02:12,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:02:12,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:02:12,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:02:12,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:02:12,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:02:12,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:02:12,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:02:12,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:02:12,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:02:12,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:02:12,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:02:12,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:02:12,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:02:12,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:02:12,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:02:12,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:02:12,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:02:12,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:02:12,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:02:12,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:02:12,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:02:12,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:02:12,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:02:12,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:02:12,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:02:12,908 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:02:12,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:02:12,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:02:12,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:02:12,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:02:12,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:02:12,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:02:12,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:02:12,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:02:12,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:02:12,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:02:12,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:02:12,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:02:12,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:02:12,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:02:12,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:02:12,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:02:12,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:02:12,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:02:12,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:02:12,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:02:12,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:02:12,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:02:12,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:02:12,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:02:12,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:02:12,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:02:12,916 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:02:12,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:02:12,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:02:12,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:02:12,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:02:12,917 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_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-21 01:02:13,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:02:13,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:02:13,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:02:13,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:02:13,220 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:02:13,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-21 01:02:13,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/data/739e04416/73bd179d21bb4cdabecd21679ad3351b/FLAG1cb2dd557 [2021-11-21 01:02:14,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:02:14,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-21 01:02:14,076 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/data/739e04416/73bd179d21bb4cdabecd21679ad3351b/FLAG1cb2dd557 [2021-11-21 01:02:14,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/data/739e04416/73bd179d21bb4cdabecd21679ad3351b [2021-11-21 01:02:14,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:02:14,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:02:14,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:02:14,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:02:14,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:02:14,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:02:14" (1/1) ... [2021-11-21 01:02:14,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59521869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:14, skipping insertion in model container [2021-11-21 01:02:14,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:02:14" (1/1) ... [2021-11-21 01:02:14,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:02:14,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:02:14,575 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_5f9cb263-5a23-468f-add1-ad0d789646c6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-21 01:02:14,582 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_5f9cb263-5a23-468f-add1-ad0d789646c6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-21 01:02:15,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,337 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,337 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,338 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,363 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,364 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,365 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,369 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:15,731 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:02:15,732 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:02:15,733 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:02:15,734 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:02:15,736 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:02:15,736 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:02:15,737 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:02:15,738 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:02:15,738 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:02:15,739 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:02:15,925 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:02:15,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:02:16,051 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:02:16,086 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_5f9cb263-5a23-468f-add1-ad0d789646c6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-21 01:02:16,087 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_5f9cb263-5a23-468f-add1-ad0d789646c6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-21 01:02:16,136 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,137 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,137 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,137 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,138 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,145 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,145 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,146 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,147 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:02:16,185 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:02:16,186 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:02:16,187 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:02:16,187 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:02:16,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:02:16,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:02:16,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:02:16,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:02:16,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:02:16,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:02:16,214 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:02:16,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:02:16,453 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:02:16,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16 WrapperNode [2021-11-21 01:02:16,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:02:16,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:02:16,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:02:16,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:02:16,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,592 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 150 [2021-11-21 01:02:16,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:02:16,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:02:16,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:02:16,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:02:16,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:02:16,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:02:16,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:02:16,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:02:16,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (1/1) ... [2021-11-21 01:02:16,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:02:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:16,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:02:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:02:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:02:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:02:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:02:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:02:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:02:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:02:16,734 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 01:02:16,734 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 01:02:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:02:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:02:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-11-21 01:02:16,735 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-11-21 01:02:16,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:02:16,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:02:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:02:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:02:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:02:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:02:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:02:16,736 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:02:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:02:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-21 01:02:16,737 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-21 01:02:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:02:17,021 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:02:17,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:02:17,352 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:02:17,512 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:02:17,512 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:02:17,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:02:17 BoogieIcfgContainer [2021-11-21 01:02:17,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:02:17,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:02:17,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:02:17,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:02:17,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:02:14" (1/3) ... [2021-11-21 01:02:17,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23806088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:02:17, skipping insertion in model container [2021-11-21 01:02:17,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:02:16" (2/3) ... [2021-11-21 01:02:17,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23806088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:02:17, skipping insertion in model container [2021-11-21 01:02:17,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:02:17" (3/3) ... [2021-11-21 01:02:17,530 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-11-21 01:02:17,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:02:17,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:02:17,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:02:17,595 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:02:17,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:02:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 01:02:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:02:17,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:17,620 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:17,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 520735072, now seen corresponding path program 1 times [2021-11-21 01:02:17,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:17,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245995210] [2021-11-21 01:02:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:17,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:02:18,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245995210] [2021-11-21 01:02:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245995210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908259530] [2021-11-21 01:02:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:18,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:18,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:18,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:02:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:02:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:02:18,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:02:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908259530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:18,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:02:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 10 [2021-11-21 01:02:18,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209858149] [2021-11-21 01:02:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:18,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:02:18,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:02:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:02:18,804 INFO L87 Difference]: Start difference. First operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-21 01:02:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:19,091 INFO L93 Difference]: Finished difference Result 140 states and 205 transitions. [2021-11-21 01:02:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:02:19,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42 [2021-11-21 01:02:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:19,106 INFO L225 Difference]: With dead ends: 140 [2021-11-21 01:02:19,106 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:02:19,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:02:19,119 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:19,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 363 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:02:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-21 01:02:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2021-11-21 01:02:19,202 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 42 [2021-11-21 01:02:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:19,203 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2021-11-21 01:02:19,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-21 01:02:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2021-11-21 01:02:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:02:19,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:19,207 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:19,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:19,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:02:19,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1517449636, now seen corresponding path program 1 times [2021-11-21 01:02:19,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939423682] [2021-11-21 01:02:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:19,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:19,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939423682] [2021-11-21 01:02:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939423682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:19,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:19,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:02:19,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510090307] [2021-11-21 01:02:19,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:19,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:02:19,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:02:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:02:19,598 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:02:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:19,769 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2021-11-21 01:02:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:02:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 44 [2021-11-21 01:02:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:19,772 INFO L225 Difference]: With dead ends: 140 [2021-11-21 01:02:19,772 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:02:19,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:02:19,775 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:19,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 402 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:02:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-21 01:02:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2021-11-21 01:02:19,796 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 44 [2021-11-21 01:02:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:19,797 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2021-11-21 01:02:19,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:02:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2021-11-21 01:02:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:02:19,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:19,802 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2021-11-21 01:02:19,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:02:19,802 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -301934184, now seen corresponding path program 1 times [2021-11-21 01:02:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401535010] [2021-11-21 01:02:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:19,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:19,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:19,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401535010] [2021-11-21 01:02:19,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401535010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:19,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:19,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:02:19,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040584803] [2021-11-21 01:02:19,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:19,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:02:19,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:02:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:02:19,982 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:02:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:20,220 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2021-11-21 01:02:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:02:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2021-11-21 01:02:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:20,226 INFO L225 Difference]: With dead ends: 149 [2021-11-21 01:02:20,226 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 01:02:20,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:02:20,233 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 69 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:20,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 01:02:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-11-21 01:02:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-11-21 01:02:20,263 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 46 [2021-11-21 01:02:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:20,263 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-11-21 01:02:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:02:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-11-21 01:02:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:02:20,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:20,270 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1] [2021-11-21 01:02:20,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:02:20,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -271050449, now seen corresponding path program 1 times [2021-11-21 01:02:20,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674564997] [2021-11-21 01:02:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:20,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:20,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674564997] [2021-11-21 01:02:20,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674564997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:20,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:20,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:20,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579871622] [2021-11-21 01:02:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:20,380 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:02:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:20,499 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2021-11-21 01:02:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:02:20,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2021-11-21 01:02:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:20,504 INFO L225 Difference]: With dead ends: 145 [2021-11-21 01:02:20,504 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 01:02:20,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:02:20,507 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 35 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:20,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 218 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 01:02:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-21 01:02:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-21 01:02:20,538 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 47 [2021-11-21 01:02:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:20,538 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-21 01:02:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:02:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-21 01:02:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:02:20,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:20,545 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:20,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:02:20,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1195380273, now seen corresponding path program 1 times [2021-11-21 01:02:20,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077049815] [2021-11-21 01:02:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:20,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:02:20,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077049815] [2021-11-21 01:02:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077049815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173715342] [2021-11-21 01:02:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:20,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:20,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:20,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:02:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:02:20,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:02:21,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:02:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173715342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:21,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:02:21,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 13 [2021-11-21 01:02:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669455057] [2021-11-21 01:02:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:02:21,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:02:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:02:21,254 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 10 states, 6 states have (on average 4.166666666666667) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:21,496 INFO L93 Difference]: Finished difference Result 145 states and 196 transitions. [2021-11-21 01:02:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:02:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 4.166666666666667) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2021-11-21 01:02:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:21,500 INFO L225 Difference]: With dead ends: 145 [2021-11-21 01:02:21,500 INFO L226 Difference]: Without dead ends: 79 [2021-11-21 01:02:21,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:02:21,502 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 18 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:21,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 643 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-21 01:02:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-11-21 01:02:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-21 01:02:21,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 50 [2021-11-21 01:02:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:21,522 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-21 01:02:21,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 4.166666666666667) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-21 01:02:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:02:21,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:21,526 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:21,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:21,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:21,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash -286328061, now seen corresponding path program 1 times [2021-11-21 01:02:21,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:21,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312152951] [2021-11-21 01:02:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:21,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:21,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312152951] [2021-11-21 01:02:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312152951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46059016] [2021-11-21 01:02:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:21,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:21,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:21,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:02:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:02:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:02:22,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:02:22,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46059016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:22,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:02:22,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-21 01:02:22,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515152524] [2021-11-21 01:02:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:22,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:02:22,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:02:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:02:22,316 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:22,535 INFO L93 Difference]: Finished difference Result 150 states and 202 transitions. [2021-11-21 01:02:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:02:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 52 [2021-11-21 01:02:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:22,537 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:02:22,537 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 01:02:22,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:02:22,538 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 22 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:22,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 505 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 01:02:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-21 01:02:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-21 01:02:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2021-11-21 01:02:22,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2021-11-21 01:02:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:22,548 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2021-11-21 01:02:22,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2021-11-21 01:02:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:02:22,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:22,550 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:22,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:22,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:22,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash 212739364, now seen corresponding path program 1 times [2021-11-21 01:02:22,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:22,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151108398] [2021-11-21 01:02:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:22,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:02:23,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151108398] [2021-11-21 01:02:23,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151108398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:23,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:23,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 01:02:23,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950765779] [2021-11-21 01:02:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:02:23,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:02:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:02:23,288 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:23,991 INFO L93 Difference]: Finished difference Result 124 states and 175 transitions. [2021-11-21 01:02:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:02:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2021-11-21 01:02:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:23,994 INFO L225 Difference]: With dead ends: 124 [2021-11-21 01:02:23,994 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:02:23,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:02:23,995 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 37 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:23,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 749 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:02:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:02:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2021-11-21 01:02:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 55 states have internal predecessors, (59), 42 states have call successors, (42), 9 states have call predecessors, (42), 10 states have return successors, (43), 40 states have call predecessors, (43), 41 states have call successors, (43) [2021-11-21 01:02:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2021-11-21 01:02:24,011 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 53 [2021-11-21 01:02:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:24,011 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2021-11-21 01:02:24,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:02:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2021-11-21 01:02:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:02:24,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:24,013 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:24,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:02:24,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:24,014 INFO L85 PathProgramCache]: Analyzing trace with hash -548953146, now seen corresponding path program 1 times [2021-11-21 01:02:24,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:24,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434131085] [2021-11-21 01:02:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:24,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:24,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434131085] [2021-11-21 01:02:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434131085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429736547] [2021-11-21 01:02:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:24,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:24,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:24,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:02:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:02:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:02:24,711 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 01:02:24,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 44 [2021-11-21 01:02:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:02:26,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:32,216 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 6706 treesize of output 6642 [2021-11-21 01:02:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:02:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429736547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270031842] [2021-11-21 01:02:33,746 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-21 01:02:33,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:33,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:33,756 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:33,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:34,026 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-21 01:02:34,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-21 01:02:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:34,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-21 01:02:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:02:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:02:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:02:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:02:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:02:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,837 INFO L354 Elim1Store]: treesize reduction 162, result has 22.1 percent of original size [2021-11-21 01:02:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 52 treesize of output 93 [2021-11-21 01:02:37,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,021 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-21 01:02:38,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:02:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:02:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,291 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-21 01:02:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 62 [2021-11-21 01:02:38,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 01:02:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:38,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:38,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:39,590 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-21 01:02:39,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 774 treesize of output 783 [2021-11-21 01:02:39,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:39,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:39,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:39,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:40,091 INFO L354 Elim1Store]: treesize reduction 603, result has 18.0 percent of original size [2021-11-21 01:02:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 865 treesize of output 874 [2021-11-21 01:02:40,395 INFO L354 Elim1Store]: treesize reduction 252, result has 15.2 percent of original size [2021-11-21 01:02:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 968 treesize of output 981 [2021-11-21 01:02:40,802 INFO L354 Elim1Store]: treesize reduction 332, result has 13.8 percent of original size [2021-11-21 01:02:40,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 974 treesize of output 994 [2021-11-21 01:02:40,960 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 01:02:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 983 treesize of output 936 [2021-11-21 01:02:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:41,005 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 938 treesize of output 917 [2021-11-21 01:02:41,125 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:02:41,125 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 926 treesize of output 874 [2021-11-21 01:02:52,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:02:52,278 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:02:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:02:52,317 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:02:52,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-21 01:02:52,363 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:02:52,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 01:02:52,397 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:02:52,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:02:52,461 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 6 treesize of output 5 [2021-11-21 01:02:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:02:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:02:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:52,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:02:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:52,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:02:59,033 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-21 01:03:05,146 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 67 for LOIs [2021-11-21 01:03:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,361 INFO L354 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2021-11-21 01:03:07,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 727 treesize of output 581 [2021-11-21 01:03:07,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,506 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-21 01:03:07,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 287 [2021-11-21 01:03:07,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,678 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-21 01:03:07,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 309 treesize of output 273 [2021-11-21 01:03:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:07,773 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-21 01:03:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 262 [2021-11-21 01:03:08,963 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 01:03:09,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:03:09,107 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 26 for LOIs [2021-11-21 01:03:09,552 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 108 for LOIs [2021-11-21 01:03:09,651 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 01:03:10,135 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:03:16,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:03:16,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:03:16,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2021-11-21 01:03:16,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594932462] [2021-11-21 01:03:16,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:03:16,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:03:16,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:03:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3556, Unknown=2, NotChecked=0, Total=3782 [2021-11-21 01:03:16,019 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-21 01:03:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:19,777 INFO L93 Difference]: Finished difference Result 264 states and 387 transitions. [2021-11-21 01:03:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:03:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) Word has length 54 [2021-11-21 01:03:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:19,781 INFO L225 Difference]: With dead ends: 264 [2021-11-21 01:03:19,781 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 01:03:19,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=353, Invalid=5194, Unknown=3, NotChecked=0, Total=5550 [2021-11-21 01:03:19,785 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 180 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1824 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 882 Invalid, 0 Unknown, 308 Unchecked, 1.1s Time] [2021-11-21 01:03:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 01:03:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2021-11-21 01:03:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.162162162162162) internal successors, (86), 79 states have internal predecessors, (86), 46 states have call successors, (46), 11 states have call predecessors, (46), 13 states have return successors, (50), 43 states have call predecessors, (50), 45 states have call successors, (50) [2021-11-21 01:03:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2021-11-21 01:03:19,808 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 54 [2021-11-21 01:03:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2021-11-21 01:03:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-21 01:03:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2021-11-21 01:03:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 01:03:19,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:19,811 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:03:19,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:03:20,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:20,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:03:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash 209078681, now seen corresponding path program 2 times [2021-11-21 01:03:20,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:20,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424958141] [2021-11-21 01:03:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:20,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:03:20,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:20,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424958141] [2021-11-21 01:03:20,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424958141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:20,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45293831] [2021-11-21 01:03:20,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:03:20,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:20,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:03:20,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:03:20,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:03:21,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:03:21,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:03:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-21 01:03:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:03:21,339 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 10 treesize of output 8 [2021-11-21 01:03:21,541 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:03:21,542 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 33 treesize of output 20 [2021-11-21 01:03:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,814 INFO L354 Elim1Store]: treesize reduction 293, result has 15.3 percent of original size [2021-11-21 01:03:38,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 527 treesize of output 346 [2021-11-21 01:03:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:38,901 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-11-21 01:03:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 191 treesize of output 118 [2021-11-21 01:03:39,768 INFO L354 Elim1Store]: treesize reduction 296, result has 22.3 percent of original size [2021-11-21 01:03:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 438 treesize of output 297 [2021-11-21 01:03:39,875 INFO L354 Elim1Store]: treesize reduction 291, result has 9.3 percent of original size [2021-11-21 01:03:39,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 251 treesize of output 192 [2021-11-21 01:03:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:03:40,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:03:42,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:42,222 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 792 treesize of output 720 [2021-11-21 01:03:42,566 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 3602 treesize of output 3530 [2021-11-21 01:03:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45293831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278561518] [2021-11-21 01:03:47,094 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-21 01:03:47,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:03:47,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:03:47,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:03:47,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:03:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:47,204 INFO L354 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2021-11-21 01:03:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2021-11-21 01:03:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:47,412 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-21 01:03:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-21 01:03:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:03:48,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:03:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:03:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:03:48,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:03:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:03:48,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:03:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:03:48,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:48,745 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:03:48,746 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 1 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 01:03:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:48,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:48,865 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-21 01:03:48,865 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 1 case distinctions, treesize of input 48 treesize of output 41 [2021-11-21 01:03:48,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:03:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:03:49,159 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:03:49,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:03:49,193 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:03:49,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 01:03:49,234 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:03:49,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2021-11-21 01:03:49,273 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:03:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:03:49,468 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:03:49,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:03:49,502 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:03:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 01:03:49,534 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:03:49,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 01:03:49,557 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:03:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 01:03:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:03:49,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:03:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:03:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:49,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:03:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:49,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:03:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:49,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:03:54,872 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-21 01:03:59,943 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 67 for LOIs [2021-11-21 01:04:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,037 INFO L354 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2021-11-21 01:04:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 727 treesize of output 581 [2021-11-21 01:04:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,189 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-21 01:04:02,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 287 [2021-11-21 01:04:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,340 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-21 01:04:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 309 treesize of output 273 [2021-11-21 01:04:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:02,423 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-21 01:04:02,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 262 [2021-11-21 01:04:03,781 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 01:04:03,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:04:03,937 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 26 for LOIs [2021-11-21 01:04:04,305 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 20 for LOIs [2021-11-21 01:04:04,325 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 01:04:04,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:04:10,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:04:10,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:04:10,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-11-21 01:04:10,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968488829] [2021-11-21 01:04:10,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:10,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:04:10,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:04:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4052, Unknown=4, NotChecked=0, Total=4290 [2021-11-21 01:04:10,395 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand has 27 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-21 01:04:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:13,659 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2021-11-21 01:04:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:04:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 61 [2021-11-21 01:04:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:13,662 INFO L225 Difference]: With dead ends: 192 [2021-11-21 01:04:13,662 INFO L226 Difference]: Without dead ends: 181 [2021-11-21 01:04:13,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 70 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=337, Invalid=5978, Unknown=5, NotChecked=0, Total=6320 [2021-11-21 01:04:13,665 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 45 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:13,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1826 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 764 Invalid, 0 Unknown, 210 Unchecked, 0.8s Time] [2021-11-21 01:04:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-21 01:04:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-21 01:04:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 93 states have internal predecessors, (101), 47 states have call successors, (47), 17 states have call predecessors, (47), 18 states have return successors, (48), 44 states have call predecessors, (48), 46 states have call successors, (48) [2021-11-21 01:04:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2021-11-21 01:04:13,686 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 61 [2021-11-21 01:04:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2021-11-21 01:04:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-21 01:04:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2021-11-21 01:04:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:04:13,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:13,688 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:13,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:04:13,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:04:13,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:13,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1333378944, now seen corresponding path program 1 times [2021-11-21 01:04:13,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:13,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693917944] [2021-11-21 01:04:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:13,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:04:15,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693917944] [2021-11-21 01:04:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693917944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:04:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703280486] [2021-11-21 01:04:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:15,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:15,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:15,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9cb263-5a23-468f-add1-ad0d789646c6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:04:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-21 01:04:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:15,216 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 10 treesize of output 8 [2021-11-21 01:04:15,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 01:04:15,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-21 01:04:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,287 INFO L354 Elim1Store]: treesize reduction 410, result has 12.2 percent of original size [2021-11-21 01:04:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 559 treesize of output 358 [2021-11-21 01:04:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:17,307 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-11-21 01:04:17,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 74 [2021-11-21 01:04:18,949 INFO L354 Elim1Store]: treesize reduction 165, result has 10.8 percent of original size [2021-11-21 01:04:18,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 233 treesize of output 154 [2021-11-21 01:04:18,993 INFO L354 Elim1Store]: treesize reduction 133, result has 13.1 percent of original size [2021-11-21 01:04:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 119 treesize of output 93 [2021-11-21 01:04:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:04:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:38,118 WARN L227 SmtUtils]: Spent 12.77s on a formula simplification. DAG size of input: 733 DAG size of output: 150 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:04:38,119 INFO L354 Elim1Store]: treesize reduction 264507, result has 1.3 percent of original size [2021-11-21 01:04:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 23 new quantified variables, introduced 210 case distinctions, treesize of input 663197428 treesize of output 624313229