./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_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_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:32:38,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:32:38,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:32:38,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:32:38,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:32:38,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:32:38,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:32:38,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:32:38,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:32:38,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:32:38,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:32:38,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:32:38,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:32:38,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:32:38,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:32:38,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:32:38,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:32:38,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:32:38,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:32:38,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:32:38,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:32:38,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:32:38,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:32:38,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:32:38,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:32:38,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:32:38,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:32:38,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:32:38,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:32:38,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:32:38,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:32:38,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:32:38,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:32:38,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:32:38,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:32:38,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:32:38,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:32:38,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:32:38,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:32:38,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:32:38,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:32:38,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 05:32:38,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:32:38,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:32:38,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:32:38,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:32:38,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:32:38,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:32:38,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:32:38,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:32:38,727 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:32:38,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:32:38,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:32:38,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:32:38,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:32:38,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:32:38,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:32:38,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:32:38,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:32:38,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:32:38,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:32:38,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:32:38,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:32:38,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:38,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:32:38,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:32:38,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:32:38,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:32:38,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:32:38,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:32:38,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:32:38,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:32:38,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:32:38,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-20 05:32:39,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:32:39,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:32:39,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:32:39,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:32:39,144 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:32:39,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-20 05:32:39,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/data/b0b074036/3f498312f02149f9891ada7041a8b8b3/FLAGa4b53a02e [2021-11-20 05:32:40,076 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:32:40,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-20 05:32:40,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/data/b0b074036/3f498312f02149f9891ada7041a8b8b3/FLAGa4b53a02e [2021-11-20 05:32:40,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/data/b0b074036/3f498312f02149f9891ada7041a8b8b3 [2021-11-20 05:32:40,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:32:40,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:32:40,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:40,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:32:40,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:32:40,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:40" (1/1) ... [2021-11-20 05:32:40,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e916d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:40, skipping insertion in model container [2021-11-20 05:32:40,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:40" (1/1) ... [2021-11-20 05:32:40,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:32:40,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:32:41,015 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_41918b6b-85b2-494d-9cf9-b1e1dbc97347/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-20 05:32:41,021 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_41918b6b-85b2-494d-9cf9-b1e1dbc97347/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-20 05:32:42,000 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,001 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,002 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,018 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,022 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,024 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,025 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,026 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,027 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,444 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:32:42,447 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:32:42,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:32:42,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:32:42,458 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:32:42,460 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:32:42,461 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:32:42,462 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:32:42,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:32:42,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:32:42,666 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:32:42,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:42,760 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:32:42,791 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_41918b6b-85b2-494d-9cf9-b1e1dbc97347/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-20 05:32:42,792 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_41918b6b-85b2-494d-9cf9-b1e1dbc97347/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-20 05:32:42,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,873 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,874 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,888 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,888 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,890 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,890 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,892 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,893 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,893 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:32:42,945 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:32:42,946 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:32:42,948 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:32:42,949 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:32:42,957 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:32:42,958 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:32:42,959 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:32:42,960 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:32:42,960 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:32:42,961 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:32:42,987 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:32:43,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:43,326 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:32:43,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43 WrapperNode [2021-11-20 05:32:43,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:43,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:43,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:32:43,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:32:43,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,490 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-11-20 05:32:43,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:43,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:32:43,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:32:43,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:32:43,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:32:43,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:32:43,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:32:43,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:32:43,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (1/1) ... [2021-11-20 05:32:43,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:43,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:32:43,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:32:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 05:32:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 05:32:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-20 05:32:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-20 05:32:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:32:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:32:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:32:43,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:32:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-20 05:32:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-20 05:32:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:32:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-20 05:32:43,679 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-20 05:32:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:32:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:32:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:32:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:32:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-20 05:32:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-20 05:32:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 05:32:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 05:32:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:32:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:32:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:32:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:32:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:32:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 05:32:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 05:32:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-20 05:32:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-20 05:32:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:32:44,037 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:32:44,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:32:44,424 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:32:44,432 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:32:44,433 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 05:32:44,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:44 BoogieIcfgContainer [2021-11-20 05:32:44,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:32:44,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:32:44,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:32:44,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:32:44,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:40" (1/3) ... [2021-11-20 05:32:44,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9528cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:44, skipping insertion in model container [2021-11-20 05:32:44,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:43" (2/3) ... [2021-11-20 05:32:44,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9528cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:44, skipping insertion in model container [2021-11-20 05:32:44,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:44" (3/3) ... [2021-11-20 05:32:44,450 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-11-20 05:32:44,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:32:44,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:32:44,508 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:32:44,515 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=PETRI_NET, 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 [2021-11-20 05:32:44,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:32:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 05:32:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:32:44,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:44,576 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:44,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-11-20 05:32:44,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500314427] [2021-11-20 05:32:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:44,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:32:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:32:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:32:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:32:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:32:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:32:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:32:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:32:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:32:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:32:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:32:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:32:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-20 05:32:45,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500314427] [2021-11-20 05:32:45,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500314427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244631327] [2021-11-20 05:32:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:45,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:45,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:45,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:45,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:32:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:32:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 05:32:46,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244631327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:46,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 05:32:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836562343] [2021-11-20 05:32:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:46,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:46,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:46,076 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:32:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:46,197 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-11-20 05:32:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-20 05:32:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:46,229 INFO L225 Difference]: With dead ends: 274 [2021-11-20 05:32:46,233 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 05:32:46,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:46,244 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 05:32:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-11-20 05:32:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-20 05:32:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-11-20 05:32:46,328 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-11-20 05:32:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:46,330 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-11-20 05:32:46,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:32:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-11-20 05:32:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:32:46,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:46,335 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:46,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:46,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 05:32:46,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-11-20 05:32:46,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058648090] [2021-11-20 05:32:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:46,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:32:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:32:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:32:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:32:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:32:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:32:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:32:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:32:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:32:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:32:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:32:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:32:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-20 05:32:46,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058648090] [2021-11-20 05:32:46,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058648090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322134841] [2021-11-20 05:32:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:46,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:46,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:46,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:32:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:32:46,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:32:47,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:47,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322134841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:47,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:47,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 05:32:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104202976] [2021-11-20 05:32:47,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:47,207 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:32:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:47,245 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-11-20 05:32:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-20 05:32:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:47,249 INFO L225 Difference]: With dead ends: 252 [2021-11-20 05:32:47,249 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 05:32:47,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:47,252 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:47,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 520 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 05:32:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-20 05:32:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-20 05:32:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-11-20 05:32:47,269 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-11-20 05:32:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:47,270 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-11-20 05:32:47,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:32:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-11-20 05:32:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:32:47,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:47,273 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:47,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:47,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:47,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-11-20 05:32:47,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:47,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333854188] [2021-11-20 05:32:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:47,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:32:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:32:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:32:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:32:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:32:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:32:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:32:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:32:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:32:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:32:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:32:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:32:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:32:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 05:32:48,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333854188] [2021-11-20 05:32:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333854188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071146561] [2021-11-20 05:32:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:48,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:48,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:48,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:32:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 05:32:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:48,474 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 16 treesize of output 17 [2021-11-20 05:33:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:33:13,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:33:13,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071146561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:13,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:33:13,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-11-20 05:33:13,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628252373] [2021-11-20 05:33:13,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:13,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:33:13,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:33:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:33:13,243 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:13,532 INFO L93 Difference]: Finished difference Result 322 states and 439 transitions. [2021-11-20 05:33:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:33:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-20 05:33:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:13,538 INFO L225 Difference]: With dead ends: 322 [2021-11-20 05:33:13,538 INFO L226 Difference]: Without dead ends: 219 [2021-11-20 05:33:13,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 20 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:33:13,540 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 58 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:13,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1173 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2021-11-20 05:33:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-20 05:33:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 185. [2021-11-20 05:33:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 124 states have internal predecessors, (146), 49 states have call successors, (49), 13 states have call predecessors, (49), 14 states have return successors, (53), 47 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-20 05:33:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 248 transitions. [2021-11-20 05:33:13,569 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 248 transitions. Word has length 116 [2021-11-20 05:33:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:13,570 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 248 transitions. [2021-11-20 05:33:13,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 248 transitions. [2021-11-20 05:33:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:33:13,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:13,574 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:13,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:13,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:13,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash 401032922, now seen corresponding path program 1 times [2021-11-20 05:33:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:13,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334975185] [2021-11-20 05:33:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:13,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:33:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:33:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:33:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:33:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:33:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:33:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:33:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:33:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:33:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:33:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:33:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 05:33:14,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334975185] [2021-11-20 05:33:14,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334975185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280572737] [2021-11-20 05:33:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:14,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:14,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:14,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:33:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:33:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:14,535 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 05:33:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-20 05:33:14,560 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-20 05:33:14,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-20 05:33:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 127 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 05:33:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:33:43,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280572737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:43,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:43,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 11] total 34 [2021-11-20 05:33:43,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749528072] [2021-11-20 05:33:43,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:43,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:33:43,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:33:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1002, Unknown=2, NotChecked=0, Total=1122 [2021-11-20 05:33:43,361 INFO L87 Difference]: Start difference. First operand 185 states and 248 transitions. Second operand has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-20 05:33:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:48,732 INFO L93 Difference]: Finished difference Result 458 states and 617 transitions. [2021-11-20 05:33:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:33:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) Word has length 116 [2021-11-20 05:33:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:48,743 INFO L225 Difference]: With dead ends: 458 [2021-11-20 05:33:48,743 INFO L226 Difference]: Without dead ends: 294 [2021-11-20 05:33:48,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 232 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=241, Invalid=2206, Unknown=3, NotChecked=0, Total=2450 [2021-11-20 05:33:48,753 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 109 mSDsluCounter, 3345 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:48,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 3553 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 597 Unchecked, 0.3s Time] [2021-11-20 05:33:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-20 05:33:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 283. [2021-11-20 05:33:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 192 states have (on average 1.1927083333333333) internal successors, (229), 196 states have internal predecessors, (229), 66 states have call successors, (66), 22 states have call predecessors, (66), 24 states have return successors, (88), 64 states have call predecessors, (88), 65 states have call successors, (88) [2021-11-20 05:33:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 383 transitions. [2021-11-20 05:33:48,814 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 383 transitions. Word has length 116 [2021-11-20 05:33:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 383 transitions. [2021-11-20 05:33:48,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-20 05:33:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 383 transitions. [2021-11-20 05:33:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:33:48,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:48,819 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:48,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:49,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 2 times [2021-11-20 05:33:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:49,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692826020] [2021-11-20 05:33:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:33:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:33:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:33:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:33:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:33:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:33:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:33:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:33:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:33:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:33:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:33:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-20 05:33:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:49,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692826020] [2021-11-20 05:33:49,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692826020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421199017] [2021-11-20 05:33:49,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:33:49,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:49,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:49,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:33:49,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:33:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:33:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:49,802 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 16 treesize of output 17 [2021-11-20 05:33:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:33:52,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:33:52,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421199017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:52,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:33:52,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-11-20 05:33:52,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934840246] [2021-11-20 05:33:52,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:52,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:33:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:33:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:33:52,062 INFO L87 Difference]: Start difference. First operand 283 states and 383 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:52,437 INFO L93 Difference]: Finished difference Result 490 states and 679 transitions. [2021-11-20 05:33:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:33:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-20 05:33:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:52,443 INFO L225 Difference]: With dead ends: 490 [2021-11-20 05:33:52,448 INFO L226 Difference]: Without dead ends: 368 [2021-11-20 05:33:52,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:33:52,451 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 44 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:52,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1599 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2021-11-20 05:33:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-20 05:33:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 328. [2021-11-20 05:33:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 222 states have (on average 1.1891891891891893) internal successors, (264), 227 states have internal predecessors, (264), 77 states have call successors, (77), 25 states have call predecessors, (77), 28 states have return successors, (102), 75 states have call predecessors, (102), 76 states have call successors, (102) [2021-11-20 05:33:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 443 transitions. [2021-11-20 05:33:52,519 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 443 transitions. Word has length 116 [2021-11-20 05:33:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:52,520 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 443 transitions. [2021-11-20 05:33:52,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 443 transitions. [2021-11-20 05:33:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:33:52,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:52,528 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:52,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:52,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:52,744 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash -552701722, now seen corresponding path program 1 times [2021-11-20 05:33:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814167701] [2021-11-20 05:33:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:52,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:33:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:33:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:33:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:33:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:33:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:52,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:33:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:33:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:33:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:33:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:33:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:33:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 05:33:53,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:53,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814167701] [2021-11-20 05:33:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814167701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:53,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041887871] [2021-11-20 05:33:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:53,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:53,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:53,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:33:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 05:33:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,380 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 [2021-11-20 05:33:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,388 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 [2021-11-20 05:33:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:53,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-20 05:33:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:33:53,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 05:33:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:33:57,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:33:57,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041887871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:57,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:33:57,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-11-20 05:33:57,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915422385] [2021-11-20 05:33:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:57,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:33:57,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:33:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:33:57,171 INFO L87 Difference]: Start difference. First operand 328 states and 443 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:57,650 INFO L93 Difference]: Finished difference Result 555 states and 786 transitions. [2021-11-20 05:33:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:33:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-20 05:33:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:57,663 INFO L225 Difference]: With dead ends: 555 [2021-11-20 05:33:57,664 INFO L226 Difference]: Without dead ends: 433 [2021-11-20 05:33:57,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 20 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:33:57,667 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 45 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:57,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 841 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-11-20 05:33:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-20 05:33:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 393. [2021-11-20 05:33:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 278 states have internal predecessors, (319), 88 states have call successors, (88), 28 states have call predecessors, (88), 36 states have return successors, (136), 86 states have call predecessors, (136), 87 states have call successors, (136) [2021-11-20 05:33:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 543 transitions. [2021-11-20 05:33:57,729 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 543 transitions. Word has length 116 [2021-11-20 05:33:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:57,730 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 543 transitions. [2021-11-20 05:33:57,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:33:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 543 transitions. [2021-11-20 05:33:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:33:57,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:57,736 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:57,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:57,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:33:57,952 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1362048348, now seen corresponding path program 1 times [2021-11-20 05:33:57,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:57,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920548389] [2021-11-20 05:33:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:57,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:33:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:33:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:33:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:33:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:33:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:33:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:33:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:33:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:33:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:33:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:33:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:33:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 05:33:58,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920548389] [2021-11-20 05:33:58,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920548389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:58,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357298011] [2021-11-20 05:33:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:58,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:58,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:58,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:58,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:33:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:33:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:58,556 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:33:58,557 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 16 treesize of output 17 [2021-11-20 05:34:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:34:00,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:00,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357298011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:00,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:00,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2021-11-20 05:34:00,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126834002] [2021-11-20 05:34:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:00,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:34:00,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:34:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:34:00,102 INFO L87 Difference]: Start difference. First operand 393 states and 543 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:34:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:00,372 INFO L93 Difference]: Finished difference Result 647 states and 929 transitions. [2021-11-20 05:34:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:34:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-20 05:34:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:00,378 INFO L225 Difference]: With dead ends: 647 [2021-11-20 05:34:00,379 INFO L226 Difference]: Without dead ends: 525 [2021-11-20 05:34:00,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 21 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:34:00,381 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 70 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:00,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1146 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2021-11-20 05:34:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-20 05:34:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 474. [2021-11-20 05:34:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 329 states have (on average 1.2006079027355623) internal successors, (395), 343 states have internal predecessors, (395), 100 states have call successors, (100), 32 states have call predecessors, (100), 44 states have return successors, (171), 98 states have call predecessors, (171), 99 states have call successors, (171) [2021-11-20 05:34:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 666 transitions. [2021-11-20 05:34:00,458 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 666 transitions. Word has length 116 [2021-11-20 05:34:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:00,459 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 666 transitions. [2021-11-20 05:34:00,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 05:34:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 666 transitions. [2021-11-20 05:34:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:34:00,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:00,465 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:00,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:00,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:00,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1913971480, now seen corresponding path program 1 times [2021-11-20 05:34:00,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765084611] [2021-11-20 05:34:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:00,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:34:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:34:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:34:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:34:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:34:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:34:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-20 05:34:01,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:01,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765084611] [2021-11-20 05:34:01,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765084611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:01,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077181082] [2021-11-20 05:34:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:01,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:01,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:01,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:34:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:34:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 05:34:01,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:01,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077181082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:01,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:01,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 05:34:01,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899759463] [2021-11-20 05:34:01,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:01,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:01,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:34:01,593 INFO L87 Difference]: Start difference. First operand 474 states and 666 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 05:34:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:01,870 INFO L93 Difference]: Finished difference Result 741 states and 1052 transitions. [2021-11-20 05:34:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:34:01,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 116 [2021-11-20 05:34:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:01,875 INFO L225 Difference]: With dead ends: 741 [2021-11-20 05:34:01,876 INFO L226 Difference]: Without dead ends: 339 [2021-11-20 05:34:01,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:34:01,881 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 229 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:01,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 887 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:34:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-20 05:34:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-20 05:34:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 228 states have (on average 1.1754385964912282) internal successors, (268), 236 states have internal predecessors, (268), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (112), 76 states have call predecessors, (112), 77 states have call successors, (112) [2021-11-20 05:34:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 458 transitions. [2021-11-20 05:34:01,922 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 458 transitions. Word has length 116 [2021-11-20 05:34:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:01,922 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 458 transitions. [2021-11-20 05:34:01,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 05:34:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 458 transitions. [2021-11-20 05:34:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:34:01,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:01,927 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:01,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:02,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:02,146 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1755075358, now seen corresponding path program 1 times [2021-11-20 05:34:02,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:02,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935833363] [2021-11-20 05:34:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:02,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:34:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:34:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 05:34:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 05:34:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:34:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:34:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 05:34:02,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:02,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935833363] [2021-11-20 05:34:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935833363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:02,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323726532] [2021-11-20 05:34:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:02,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:02,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:02,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:02,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:34:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:34:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:02,672 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 05:34:02,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 05:34:02,688 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 05:34:02,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 05:34:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 129 proven. 5 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 05:34:11,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:34:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323726532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:12,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:12,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 11] total 30 [2021-11-20 05:34:12,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010826015] [2021-11-20 05:34:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:12,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 05:34:12,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 05:34:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:34:12,400 INFO L87 Difference]: Start difference. First operand 339 states and 458 transitions. Second operand has 30 states, 28 states have (on average 4.142857142857143) internal successors, (116), 29 states have internal predecessors, (116), 11 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-20 05:34:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:14,185 INFO L93 Difference]: Finished difference Result 737 states and 988 transitions. [2021-11-20 05:34:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:34:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.142857142857143) internal successors, (116), 29 states have internal predecessors, (116), 11 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) Word has length 116 [2021-11-20 05:34:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:14,190 INFO L225 Difference]: With dead ends: 737 [2021-11-20 05:34:14,190 INFO L226 Difference]: Without dead ends: 420 [2021-11-20 05:34:14,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 224 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 05:34:14,194 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 127 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:14,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2788 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 621 Invalid, 0 Unknown, 562 Unchecked, 0.6s Time] [2021-11-20 05:34:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-20 05:34:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 395. [2021-11-20 05:34:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 270 states have (on average 1.1888888888888889) internal successors, (321), 282 states have internal predecessors, (321), 84 states have call successors, (84), 30 states have call predecessors, (84), 40 states have return successors, (134), 82 states have call predecessors, (134), 83 states have call successors, (134) [2021-11-20 05:34:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 539 transitions. [2021-11-20 05:34:14,233 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 539 transitions. Word has length 116 [2021-11-20 05:34:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:14,234 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 539 transitions. [2021-11-20 05:34:14,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.142857142857143) internal successors, (116), 29 states have internal predecessors, (116), 11 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (36), 10 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-20 05:34:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 539 transitions. [2021-11-20 05:34:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 05:34:14,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:14,238 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:14,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:14,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:14,452 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash -441557224, now seen corresponding path program 1 times [2021-11-20 05:34:14,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270072507] [2021-11-20 05:34:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:14,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 05:34:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:34:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:34:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:34:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 05:34:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 05:34:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 05:34:14,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270072507] [2021-11-20 05:34:14,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270072507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605995749] [2021-11-20 05:34:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:14,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:14,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:14,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:34:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:34:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:34:15,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:15,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605995749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:15,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:15,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-20 05:34:15,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989245972] [2021-11-20 05:34:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:15,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:15,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:34:15,097 INFO L87 Difference]: Start difference. First operand 395 states and 539 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 05:34:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:15,393 INFO L93 Difference]: Finished difference Result 723 states and 984 transitions. [2021-11-20 05:34:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:34:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2021-11-20 05:34:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:15,397 INFO L225 Difference]: With dead ends: 723 [2021-11-20 05:34:15,398 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 05:34:15,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:34:15,400 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 217 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:15,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 746 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:34:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 05:34:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2021-11-20 05:34:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 274 states have (on average 1.186131386861314) internal successors, (325), 287 states have internal predecessors, (325), 84 states have call successors, (84), 30 states have call predecessors, (84), 41 states have return successors, (138), 82 states have call predecessors, (138), 83 states have call successors, (138) [2021-11-20 05:34:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 547 transitions. [2021-11-20 05:34:15,435 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 547 transitions. Word has length 118 [2021-11-20 05:34:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:15,435 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 547 transitions. [2021-11-20 05:34:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 05:34:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 547 transitions. [2021-11-20 05:34:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 05:34:15,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:15,439 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:15,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:15,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:15,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1084644541, now seen corresponding path program 1 times [2021-11-20 05:34:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:15,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053984562] [2021-11-20 05:34:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:15,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 05:34:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 05:34:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:34:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 05:34:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 05:34:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 05:34:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-20 05:34:15,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053984562] [2021-11-20 05:34:15,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053984562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350772154] [2021-11-20 05:34:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:15,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:15,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:15,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:34:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:34:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:34:16,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:16,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350772154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:16,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:16,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-20 05:34:16,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569603068] [2021-11-20 05:34:16,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:16,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:34:16,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:34:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:34:16,331 INFO L87 Difference]: Start difference. First operand 400 states and 547 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 05:34:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:16,718 INFO L93 Difference]: Finished difference Result 758 states and 1048 transitions. [2021-11-20 05:34:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:34:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-11-20 05:34:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:16,722 INFO L225 Difference]: With dead ends: 758 [2021-11-20 05:34:16,722 INFO L226 Difference]: Without dead ends: 437 [2021-11-20 05:34:16,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:34:16,725 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 256 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:16,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 869 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:34:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-20 05:34:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 404. [2021-11-20 05:34:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 278 states have (on average 1.1870503597122302) internal successors, (330), 291 states have internal predecessors, (330), 84 states have call successors, (84), 30 states have call predecessors, (84), 41 states have return successors, (138), 82 states have call predecessors, (138), 83 states have call successors, (138) [2021-11-20 05:34:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 552 transitions. [2021-11-20 05:34:16,762 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 552 transitions. Word has length 120 [2021-11-20 05:34:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 552 transitions. [2021-11-20 05:34:16,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 05:34:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 552 transitions. [2021-11-20 05:34:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 05:34:16,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:16,766 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:16,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:16,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:34:16,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash -831445873, now seen corresponding path program 1 times [2021-11-20 05:34:16,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264674427] [2021-11-20 05:34:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:16,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 05:34:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 05:34:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 05:34:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 05:34:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:34:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 05:34:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-20 05:34:17,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264674427] [2021-11-20 05:34:17,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264674427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575557177] [2021-11-20 05:34:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:17,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:17,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:17,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:34:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:34:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:34:17,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:17,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575557177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:17,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:17,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-20 05:34:17,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790753615] [2021-11-20 05:34:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:17,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:17,558 INFO L87 Difference]: Start difference. First operand 404 states and 552 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:34:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:17,583 INFO L93 Difference]: Finished difference Result 670 states and 936 transitions. [2021-11-20 05:34:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2021-11-20 05:34:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:17,586 INFO L225 Difference]: With dead ends: 670 [2021-11-20 05:34:17,586 INFO L226 Difference]: Without dead ends: 318 [2021-11-20 05:34:17,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:17,587 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:17,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 353 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-20 05:34:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2021-11-20 05:34:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 221 states have internal predecessors, (247), 72 states have call successors, (72), 20 states have call predecessors, (72), 30 states have return successors, (114), 70 states have call predecessors, (114), 71 states have call successors, (114) [2021-11-20 05:34:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 433 transitions. [2021-11-20 05:34:17,612 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 433 transitions. Word has length 121 [2021-11-20 05:34:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:17,613 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 433 transitions. [2021-11-20 05:34:17,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 05:34:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 433 transitions. [2021-11-20 05:34:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 05:34:17,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:17,616 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:17,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:17,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:17,830 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash 419527413, now seen corresponding path program 1 times [2021-11-20 05:34:17,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:17,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956684589] [2021-11-20 05:34:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:17,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:34:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 05:34:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 05:34:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 05:34:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 05:34:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 05:34:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 05:34:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 05:34:18,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956684589] [2021-11-20 05:34:18,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956684589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917556564] [2021-11-20 05:34:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:18,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:18,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:18,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:18,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:34:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:34:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:18,303 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 05:34:18,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-20 05:34:18,326 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-20 05:34:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-20 05:34:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 127 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 05:34:29,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:34:30,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917556564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:30,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:30,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 11] total 31 [2021-11-20 05:34:30,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831108282] [2021-11-20 05:34:30,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:30,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:34:30,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:30,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:34:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:34:30,586 INFO L87 Difference]: Start difference. First operand 312 states and 433 transitions. Second operand has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 30 states have internal predecessors, (141), 11 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 05:34:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:33,684 INFO L93 Difference]: Finished difference Result 507 states and 716 transitions. [2021-11-20 05:34:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:34:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 30 states have internal predecessors, (141), 11 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) Word has length 129 [2021-11-20 05:34:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:33,688 INFO L225 Difference]: With dead ends: 507 [2021-11-20 05:34:33,688 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 05:34:33,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 251 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=202, Invalid=1959, Unknown=1, NotChecked=0, Total=2162 [2021-11-20 05:34:33,691 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 100 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:33,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 2510 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 328 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2021-11-20 05:34:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 05:34:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-11-20 05:34:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 143 states have internal predecessors, (162), 52 states have call successors, (52), 14 states have call predecessors, (52), 18 states have return successors, (71), 50 states have call predecessors, (71), 51 states have call successors, (71) [2021-11-20 05:34:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 285 transitions. [2021-11-20 05:34:33,727 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 285 transitions. Word has length 129 [2021-11-20 05:34:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:33,728 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 285 transitions. [2021-11-20 05:34:33,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 30 states have internal predecessors, (141), 11 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 05:34:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 285 transitions. [2021-11-20 05:34:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 05:34:33,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:33,731 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:33,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:33,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:34:33,948 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1662855644, now seen corresponding path program 1 times [2021-11-20 05:34:33,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795583272] [2021-11-20 05:34:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:33,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:34:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:34:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:34:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 05:34:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 05:34:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 05:34:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:34:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 05:34:34,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795583272] [2021-11-20 05:34:34,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795583272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813937389] [2021-11-20 05:34:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:34,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:34,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:34,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:34:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:34:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:34,464 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 05:34:34,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-20 05:34:34,480 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 05:34:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-20 05:34:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 121 proven. 17 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 05:34:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-20 05:34:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813937389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:52,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:52,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 12] total 34 [2021-11-20 05:34:52,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294211955] [2021-11-20 05:34:52,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:52,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:34:52,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:34:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=993, Unknown=1, NotChecked=0, Total=1122 [2021-11-20 05:34:52,720 INFO L87 Difference]: Start difference. First operand 208 states and 285 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 32 states have internal predecessors, (151), 14 states have call successors, (39), 5 states have call predecessors, (39), 9 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-20 05:34:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:56,253 INFO L93 Difference]: Finished difference Result 462 states and 656 transitions. [2021-11-20 05:34:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:34:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 32 states have internal predecessors, (151), 14 states have call successors, (39), 5 states have call predecessors, (39), 9 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) Word has length 131 [2021-11-20 05:34:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:56,256 INFO L225 Difference]: With dead ends: 462 [2021-11-20 05:34:56,256 INFO L226 Difference]: Without dead ends: 307 [2021-11-20 05:34:56,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 260 SyntacticMatches, 19 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=341, Invalid=2413, Unknown=2, NotChecked=0, Total=2756 [2021-11-20 05:34:56,260 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 364 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:56,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 2587 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 860 Invalid, 0 Unknown, 468 Unchecked, 0.8s Time] [2021-11-20 05:34:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-20 05:34:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 262. [2021-11-20 05:34:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 185 states have (on average 1.2) internal successors, (222), 191 states have internal predecessors, (222), 52 states have call successors, (52), 19 states have call predecessors, (52), 24 states have return successors, (61), 51 states have call predecessors, (61), 51 states have call successors, (61) [2021-11-20 05:34:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 335 transitions. [2021-11-20 05:34:56,292 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 335 transitions. Word has length 131 [2021-11-20 05:34:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 335 transitions. [2021-11-20 05:34:56,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 32 states have internal predecessors, (151), 14 states have call successors, (39), 5 states have call predecessors, (39), 9 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-20 05:34:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 335 transitions. [2021-11-20 05:34:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 05:34:56,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:56,296 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:56,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:34:56,524 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1187163488, now seen corresponding path program 1 times [2021-11-20 05:34:56,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106969384] [2021-11-20 05:34:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:56,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:34:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:34:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:34:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:34:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:34:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:34:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:34:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:34:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:34:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:34:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:34:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 05:34:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 05:34:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-20 05:34:56,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106969384] [2021-11-20 05:34:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106969384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419259671] [2021-11-20 05:34:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:56,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:56,803 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:34:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-20 05:34:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:57,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,111 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 [2021-11-20 05:34:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,122 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 [2021-11-20 05:34:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:34:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-20 05:34:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:34:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 05:35:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 05:35:01,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:03,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 05:35:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2597 treesize of output 2565 [2021-11-20 05:35:03,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 05:35:03,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4537 treesize of output 4497 [2021-11-20 05:35:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:35:05,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419259671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:05,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:05,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 16] total 34 [2021-11-20 05:35:05,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612702240] [2021-11-20 05:35:05,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:05,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:35:05,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:35:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:35:05,308 INFO L87 Difference]: Start difference. First operand 262 states and 335 transitions. Second operand has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 32 states have internal predecessors, (138), 15 states have call successors, (45), 3 states have call predecessors, (45), 8 states have return successors, (44), 15 states have call predecessors, (44), 15 states have call successors, (44) [2021-11-20 05:35:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:09,956 INFO L93 Difference]: Finished difference Result 753 states and 1040 transitions. [2021-11-20 05:35:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:35:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 32 states have internal predecessors, (138), 15 states have call successors, (45), 3 states have call predecessors, (45), 8 states have return successors, (44), 15 states have call predecessors, (44), 15 states have call successors, (44) Word has length 132 [2021-11-20 05:35:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:09,962 INFO L225 Difference]: With dead ends: 753 [2021-11-20 05:35:09,962 INFO L226 Difference]: Without dead ends: 499 [2021-11-20 05:35:09,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 257 SyntacticMatches, 20 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=308, Invalid=2884, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 05:35:09,966 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 230 mSDsluCounter, 3481 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:09,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 3704 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2024 Invalid, 0 Unknown, 546 Unchecked, 2.8s Time] [2021-11-20 05:35:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-20 05:35:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 385. [2021-11-20 05:35:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 280 states have (on average 1.1892857142857143) internal successors, (333), 288 states have internal predecessors, (333), 70 states have call successors, (70), 29 states have call predecessors, (70), 34 states have return successors, (88), 67 states have call predecessors, (88), 69 states have call successors, (88) [2021-11-20 05:35:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 491 transitions. [2021-11-20 05:35:10,029 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 491 transitions. Word has length 132 [2021-11-20 05:35:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 491 transitions. [2021-11-20 05:35:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 32 states have internal predecessors, (138), 15 states have call successors, (45), 3 states have call predecessors, (45), 8 states have return successors, (44), 15 states have call predecessors, (44), 15 states have call successors, (44) [2021-11-20 05:35:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 491 transitions. [2021-11-20 05:35:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 05:35:10,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:10,034 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:10,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:10,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:10,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1837983592, now seen corresponding path program 1 times [2021-11-20 05:35:10,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:10,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027623477] [2021-11-20 05:35:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:10,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:35:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:35:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:35:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 05:35:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 05:35:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:35:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:35:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:35:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:35:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:35:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 05:35:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 05:35:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-20 05:35:10,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:10,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027623477] [2021-11-20 05:35:10,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027623477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:10,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898850302] [2021-11-20 05:35:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:10,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:10,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:10,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:35:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:35:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:35:11,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:35:11,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898850302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:11,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:35:11,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-20 05:35:11,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839028245] [2021-11-20 05:35:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:35:11,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:35:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:35:11,322 INFO L87 Difference]: Start difference. First operand 385 states and 491 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 05:35:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:11,738 INFO L93 Difference]: Finished difference Result 534 states and 695 transitions. [2021-11-20 05:35:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:35:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 138 [2021-11-20 05:35:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:11,742 INFO L225 Difference]: With dead ends: 534 [2021-11-20 05:35:11,742 INFO L226 Difference]: Without dead ends: 386 [2021-11-20 05:35:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:35:11,744 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 225 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:11,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 872 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:35:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-20 05:35:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2021-11-20 05:35:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 278 states have (on average 1.1762589928057554) internal successors, (327), 285 states have internal predecessors, (327), 70 states have call successors, (70), 29 states have call predecessors, (70), 33 states have return successors, (85), 67 states have call predecessors, (85), 69 states have call successors, (85) [2021-11-20 05:35:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 482 transitions. [2021-11-20 05:35:11,804 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 482 transitions. Word has length 138 [2021-11-20 05:35:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:11,804 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 482 transitions. [2021-11-20 05:35:11,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 05:35:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 482 transitions. [2021-11-20 05:35:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 05:35:11,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:11,808 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:11,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:12,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:12,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1774942405, now seen corresponding path program 1 times [2021-11-20 05:35:12,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637701825] [2021-11-20 05:35:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:12,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:35:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:35:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:35:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 05:35:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 05:35:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:35:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:35:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:35:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 05:35:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 05:35:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 05:35:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 05:35:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-20 05:35:12,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637701825] [2021-11-20 05:35:12,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637701825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131833906] [2021-11-20 05:35:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:12,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:12,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:12,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:35:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:35:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:35:13,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:35:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131833906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:13,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:35:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2021-11-20 05:35:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886291471] [2021-11-20 05:35:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:35:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:35:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:35:13,116 INFO L87 Difference]: Start difference. First operand 382 states and 482 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 05:35:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:13,610 INFO L93 Difference]: Finished difference Result 541 states and 702 transitions. [2021-11-20 05:35:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:35:13,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 140 [2021-11-20 05:35:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:13,614 INFO L225 Difference]: With dead ends: 541 [2021-11-20 05:35:13,614 INFO L226 Difference]: Without dead ends: 398 [2021-11-20 05:35:13,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:35:13,617 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 248 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:13,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 993 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:35:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-20 05:35:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 382. [2021-11-20 05:35:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 278 states have (on average 1.169064748201439) internal successors, (325), 285 states have internal predecessors, (325), 70 states have call successors, (70), 29 states have call predecessors, (70), 33 states have return successors, (85), 67 states have call predecessors, (85), 69 states have call successors, (85) [2021-11-20 05:35:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 480 transitions. [2021-11-20 05:35:13,669 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 480 transitions. Word has length 140 [2021-11-20 05:35:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:13,670 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 480 transitions. [2021-11-20 05:35:13,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 05:35:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 480 transitions. [2021-11-20 05:35:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 05:35:13,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:13,673 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:13,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:13,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:35:13,889 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash 315027163, now seen corresponding path program 1 times [2021-11-20 05:35:13,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:13,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806386973] [2021-11-20 05:35:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:13,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:35:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:35:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:35:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:35:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:35:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:35:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:35:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:35:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:35:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 05:35:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 05:35:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 05:35:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-20 05:35:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 05:35:14,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:14,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806386973] [2021-11-20 05:35:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806386973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:14,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404035907] [2021-11-20 05:35:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:14,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:14,212 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:14,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:35:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:35:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 05:35:14,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 05:35:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404035907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:15,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:15,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-11-20 05:35:15,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258754979] [2021-11-20 05:35:15,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:15,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:35:15,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:35:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:35:15,343 INFO L87 Difference]: Start difference. First operand 382 states and 480 transitions. Second operand has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-20 05:35:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:15,761 INFO L93 Difference]: Finished difference Result 602 states and 778 transitions. [2021-11-20 05:35:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:35:15,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 145 [2021-11-20 05:35:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:15,766 INFO L225 Difference]: With dead ends: 602 [2021-11-20 05:35:15,767 INFO L226 Difference]: Without dead ends: 411 [2021-11-20 05:35:15,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:35:15,770 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 13 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:15,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2487 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:35:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-20 05:35:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 382. [2021-11-20 05:35:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 278 states have (on average 1.158273381294964) internal successors, (322), 285 states have internal predecessors, (322), 70 states have call successors, (70), 29 states have call predecessors, (70), 33 states have return successors, (85), 67 states have call predecessors, (85), 69 states have call successors, (85) [2021-11-20 05:35:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 477 transitions. [2021-11-20 05:35:15,834 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 477 transitions. Word has length 145 [2021-11-20 05:35:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:15,835 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 477 transitions. [2021-11-20 05:35:15,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-20 05:35:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 477 transitions. [2021-11-20 05:35:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 05:35:15,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:15,838 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:15,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:16,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:35:16,064 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash 900691480, now seen corresponding path program 1 times [2021-11-20 05:35:16,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486750834] [2021-11-20 05:35:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:16,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:35:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:35:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 05:35:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 05:35:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:35:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 05:35:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 05:35:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 05:35:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 05:35:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 05:35:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 05:35:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 05:35:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 05:35:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 35 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 05:35:16,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:16,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486750834] [2021-11-20 05:35:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486750834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991469121] [2021-11-20 05:35:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:16,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:16,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:16,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:35:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 05:35:17,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:17,340 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:35:17,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 05:35:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 49 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 05:35:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:22,094 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 210 treesize of output 198 [2021-11-20 05:35:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 05:35:22,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991469121] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:22,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:35:22,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 16] total 40 [2021-11-20 05:35:22,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769914255] [2021-11-20 05:35:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:22,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:35:22,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:35:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:35:22,290 INFO L87 Difference]: Start difference. First operand 382 states and 477 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 05:35:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:23,150 INFO L93 Difference]: Finished difference Result 504 states and 639 transitions. [2021-11-20 05:35:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:35:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 148 [2021-11-20 05:35:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:23,154 INFO L225 Difference]: With dead ends: 504 [2021-11-20 05:35:23,155 INFO L226 Difference]: Without dead ends: 383 [2021-11-20 05:35:23,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 287 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:35:23,158 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 237 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:23,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1039 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:35:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-20 05:35:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2021-11-20 05:35:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 276 states have (on average 1.1557971014492754) internal successors, (319), 283 states have internal predecessors, (319), 70 states have call successors, (70), 29 states have call predecessors, (70), 33 states have return successors, (85), 67 states have call predecessors, (85), 69 states have call successors, (85) [2021-11-20 05:35:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 474 transitions. [2021-11-20 05:35:23,207 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 474 transitions. Word has length 148 [2021-11-20 05:35:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:23,208 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 474 transitions. [2021-11-20 05:35:23,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 05:35:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 474 transitions. [2021-11-20 05:35:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 05:35:23,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:23,211 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:23,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:23,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:23,424 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1133516822, now seen corresponding path program 1 times [2021-11-20 05:35:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370302926] [2021-11-20 05:35:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:23,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:35:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:35:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:35:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 05:35:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:35:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 05:35:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:23,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:35:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:35:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:35:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:35:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 05:35:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 05:35:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 05:35:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-20 05:35:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 05:35:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 05:35:24,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:24,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370302926] [2021-11-20 05:35:24,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370302926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648699864] [2021-11-20 05:35:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:24,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:24,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:24,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41918b6b-85b2-494d-9cf9-b1e1dbc97347/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:35:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 05:35:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:24,691 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 05:35:24,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-20 05:35:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:24,925 INFO L354 Elim1Store]: treesize reduction 123, result has 25.0 percent of original size [2021-11-20 05:35:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 64 [2021-11-20 05:35:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:25,560 INFO L354 Elim1Store]: treesize reduction 286, result has 23.9 percent of original size [2021-11-20 05:35:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 104 treesize of output 131 [2021-11-20 05:35:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 05:35:47,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:57,316 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_14| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_6| Int)) (or (not (= |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base| (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|)))) (store .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| (store (store (select .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_6| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_14| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|))) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|))) is different from false [2021-11-20 05:35:57,392 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 23459212 treesize of output 23393676