./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8 --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 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 10:56:13,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:56:13,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:56:13,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:56:13,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:56:13,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:56:13,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:56:13,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:56:13,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:56:13,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:56:13,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:56:13,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:56:13,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:56:13,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:56:13,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:56:13,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:56:13,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:56:13,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:56:13,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:56:13,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:56:13,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:56:13,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:56:13,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:56:13,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:56:13,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:56:13,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:56:13,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:56:13,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:56:13,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:56:13,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:56:13,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:56:13,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:56:13,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:56:13,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:56:13,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:56:13,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:56:13,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:56:13,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:56:13,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:56:13,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:56:13,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:56:13,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 10:56:13,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:56:13,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:56:13,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:56:13,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:56:13,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:56:13,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:56:13,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:56:13,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:56:13,571 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:56:13,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:56:13,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:56:13,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:56:13,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 10:56:13,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:56:13,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 10:56:13,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 10:56:13,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:56:13,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 10:56:13,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:56:13,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:56:13,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:56:13,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:13,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:56:13,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 10:56:13,574 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:56:13,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:56:13,575 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:56:13,575 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2022-12-13 10:56:13,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:56:13,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:56:13,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:56:13,754 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:56:13,754 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:56:13,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2022-12-13 10:56:16,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:56:16,690 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:56:16,690 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2022-12-13 10:56:16,709 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/data/c7ad5a9fe/58f7e936ee984f5d8578cdcdae5bf48c/FLAGa4e6734ba [2022-12-13 10:56:16,719 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/data/c7ad5a9fe/58f7e936ee984f5d8578cdcdae5bf48c [2022-12-13 10:56:16,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:56:16,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:56:16,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:16,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:56:16,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:56:16,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:16" (1/1) ... [2022-12-13 10:56:16,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a98a706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:16, skipping insertion in model container [2022-12-13 10:56:16,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:16" (1/1) ... [2022-12-13 10:56:16,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:56:16,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:56:16,985 WARN L237 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_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2022-12-13 10:56:16,992 WARN L237 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_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2022-12-13 10:56:17,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,703 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,704 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,722 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,724 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,725 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:17,781 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:17,782 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:17,782 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:17,786 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 10:56:17,788 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 10:56:17,789 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 10:56:18,003 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 10:56:18,004 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 10:56:18,005 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 10:56:18,006 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 10:56:18,007 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 10:56:18,008 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 10:56:18,008 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 10:56:18,009 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 10:56:18,010 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 10:56:18,010 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 10:56:18,010 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 10:56:18,128 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 10:56:18,143 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 10:56:18,156 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-13 10:56:18,163 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 10:56:18,190 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,190 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,229 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 10:56:18,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:18,265 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:56:18,275 WARN L237 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_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2022-12-13 10:56:18,275 WARN L237 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_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2022-12-13 10:56:18,296 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,297 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,297 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,297 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,298 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,302 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,302 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,303 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,303 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,307 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:18,308 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:18,308 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 10:56:18,310 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 10:56:18,311 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 10:56:18,311 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 10:56:18,324 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 10:56:18,324 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 10:56:18,325 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 10:56:18,325 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 10:56:18,326 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 10:56:18,326 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 10:56:18,327 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 10:56:18,327 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 10:56:18,327 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 10:56:18,328 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 10:56:18,328 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 10:56:18,341 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 10:56:18,349 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 10:56:18,355 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-13 10:56:18,359 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 10:56:18,389 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,390 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 10:56:18,406 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 10:56:18,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:18,533 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:56:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18 WrapperNode [2022-12-13 10:56:18,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:18,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:18,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:56:18,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:56:18,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,648 INFO L138 Inliner]: procedures = 691, calls = 2649, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 872 [2022-12-13 10:56:18,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:18,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:56:18,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:56:18,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:56:18,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,697 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:56:18,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:56:18,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:56:18,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:56:18,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (1/1) ... [2022-12-13 10:56:18,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:18,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:56:18,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:56:18,771 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-12-13 10:56:18,772 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-12-13 10:56:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-13 10:56:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:56:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-13 10:56:18,772 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-13 10:56:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 10:56:18,772 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2022-12-13 10:56:18,772 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 10:56:18,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-12-13 10:56:18,773 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 10:56:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:56:18,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:56:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-13 10:56:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-13 10:56:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-12-13 10:56:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-12-13 10:56:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 10:56:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 10:56:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:56:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 10:56:18,775 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-12-13 10:56:18,775 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-12-13 10:56:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 10:56:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-13 10:56:18,787 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-13 10:56:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 10:56:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2022-12-13 10:56:18,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2022-12-13 10:56:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 10:56:18,976 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:56:18,978 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:56:19,745 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:56:19,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:56:19,751 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 10:56:19,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:19 BoogieIcfgContainer [2022-12-13 10:56:19,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:56:19,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:56:19,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:56:19,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:56:19,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:56:16" (1/3) ... [2022-12-13 10:56:19,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b392847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:19, skipping insertion in model container [2022-12-13 10:56:19,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:18" (2/3) ... [2022-12-13 10:56:19,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b392847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:19, skipping insertion in model container [2022-12-13 10:56:19,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:19" (3/3) ... [2022-12-13 10:56:19,758 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_harness.i [2022-12-13 10:56:19,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:56:19,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 10:56:19,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:56:19,812 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d4f7e73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:56:19,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 10:56:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-13 10:56:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 10:56:19,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:19,825 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2022-12-13 10:56:19,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1846687754, now seen corresponding path program 1 times [2022-12-13 10:56:19,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815439546] [2022-12-13 10:56:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 10:56:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 10:56:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 10:56:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 10:56:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 10:56:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 10:56:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 10:56:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 10:56:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 10:56:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 10:56:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 10:56:20,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815439546] [2022-12-13 10:56:20,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815439546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:20,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:56:20,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 10:56:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650024533] [2022-12-13 10:56:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 10:56:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 10:56:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:56:20,400 INFO L87 Difference]: Start difference. First operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-13 10:56:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:20,718 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2022-12-13 10:56:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 10:56:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2022-12-13 10:56:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:20,727 INFO L225 Difference]: With dead ends: 267 [2022-12-13 10:56:20,727 INFO L226 Difference]: Without dead ends: 131 [2022-12-13 10:56:20,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:56:20,732 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 106 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:20,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 151 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 10:56:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-13 10:56:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-12-13 10:56:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 10:56:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2022-12-13 10:56:20,768 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 102 [2022-12-13 10:56:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:20,768 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2022-12-13 10:56:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-13 10:56:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2022-12-13 10:56:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 10:56:20,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:20,771 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 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] [2022-12-13 10:56:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 10:56:20,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -192509010, now seen corresponding path program 1 times [2022-12-13 10:56:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579102509] [2022-12-13 10:56:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 10:56:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 10:56:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 10:56:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 10:56:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 10:56:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 10:56:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 10:56:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 10:56:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 10:56:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 10:56:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 10:56:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579102509] [2022-12-13 10:56:21,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579102509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:21,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006156826] [2022-12-13 10:56:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:21,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:21,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 10:56:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2658 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 10:56:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 10:56:21,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 10:56:21,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006156826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:21,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 10:56:21,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-13 10:56:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951289379] [2022-12-13 10:56:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 10:56:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 10:56:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-13 10:56:21,870 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-13 10:56:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:22,079 INFO L93 Difference]: Finished difference Result 252 states and 341 transitions. [2022-12-13 10:56:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:56:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 102 [2022-12-13 10:56:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:22,082 INFO L225 Difference]: With dead ends: 252 [2022-12-13 10:56:22,082 INFO L226 Difference]: Without dead ends: 131 [2022-12-13 10:56:22,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 10:56:22,085 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 183 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:22,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 337 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:56:22,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-13 10:56:22,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-12-13 10:56:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (45), 39 states have call predecessors, (45), 39 states have call successors, (45) [2022-12-13 10:56:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2022-12-13 10:56:22,107 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 102 [2022-12-13 10:56:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:22,107 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2022-12-13 10:56:22,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-13 10:56:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2022-12-13 10:56:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-13 10:56:22,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:22,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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, 1, 1] [2022-12-13 10:56:22,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 10:56:22,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:22,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash -49851437, now seen corresponding path program 1 times [2022-12-13 10:56:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:22,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969494073] [2022-12-13 10:56:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:22,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:56:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:22,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:56:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:56:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 10:56:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 10:56:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 10:56:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 10:56:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-12-13 10:56:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 10:56:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-12-13 10:56:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 10:56:23,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969494073] [2022-12-13 10:56:23,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969494073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256576402] [2022-12-13 10:56:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:23,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 10:56:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 10:56:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 10:56:23,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 10:56:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256576402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:23,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 10:56:23,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-12-13 10:56:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745744084] [2022-12-13 10:56:23,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:56:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:56:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-13 10:56:23,672 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-13 10:56:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:23,910 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2022-12-13 10:56:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 10:56:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 104 [2022-12-13 10:56:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:23,913 INFO L225 Difference]: With dead ends: 212 [2022-12-13 10:56:23,913 INFO L226 Difference]: Without dead ends: 131 [2022-12-13 10:56:23,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-12-13 10:56:23,915 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 203 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:23,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 537 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 10:56:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-13 10:56:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-12-13 10:56:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (43), 39 states have call predecessors, (43), 39 states have call successors, (43) [2022-12-13 10:56:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2022-12-13 10:56:23,931 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 104 [2022-12-13 10:56:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:23,932 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2022-12-13 10:56:23,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-13 10:56:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2022-12-13 10:56:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 10:56:23,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:23,934 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 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] [2022-12-13 10:56:23,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 10:56:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:24,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 160212765, now seen corresponding path program 2 times [2022-12-13 10:56:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:24,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185354697] [2022-12-13 10:56:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:56:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:56:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:56:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 10:56:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 10:56:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 10:56:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 10:56:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 10:56:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 10:56:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 10:56:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 10:56:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185354697] [2022-12-13 10:56:24,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185354697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48309739] [2022-12-13 10:56:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:56:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:24,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:24,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 10:56:24,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 10:56:24,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 10:56:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 10:56:24,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 10:56:24,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48309739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:24,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 10:56:24,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-13 10:56:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872937052] [2022-12-13 10:56:24,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 10:56:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 10:56:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-13 10:56:24,945 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-12-13 10:56:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:25,019 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2022-12-13 10:56:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 10:56:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2022-12-13 10:56:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:25,022 INFO L225 Difference]: With dead ends: 143 [2022-12-13 10:56:25,022 INFO L226 Difference]: Without dead ends: 141 [2022-12-13 10:56:25,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-13 10:56:25,024 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 17 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:25,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1166 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 10:56:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-13 10:56:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-12-13 10:56:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 41 states have call successors, (41), 12 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2022-12-13 10:56:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2022-12-13 10:56:25,041 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 108 [2022-12-13 10:56:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:25,041 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2022-12-13 10:56:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2022-12-13 10:56:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2022-12-13 10:56:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-13 10:56:25,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:25,044 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:25,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 10:56:25,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:25,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1574940187, now seen corresponding path program 1 times [2022-12-13 10:56:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:25,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655112067] [2022-12-13 10:56:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:56:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:56:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:56:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 10:56:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 10:56:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 10:56:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 10:56:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 10:56:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 10:56:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 10:56:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 10:56:25,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655112067] [2022-12-13 10:56:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655112067] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648902303] [2022-12-13 10:56:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:25,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:25,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 10:56:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:26,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 10:56:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:56:26,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 10:56:26,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648902303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:26,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 10:56:26,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-13 10:56:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268867846] [2022-12-13 10:56:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:56:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:56:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-13 10:56:26,247 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-13 10:56:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:26,470 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2022-12-13 10:56:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 10:56:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2022-12-13 10:56:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:26,472 INFO L225 Difference]: With dead ends: 245 [2022-12-13 10:56:26,472 INFO L226 Difference]: Without dead ends: 137 [2022-12-13 10:56:26,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-13 10:56:26,474 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 202 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:26,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 540 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 10:56:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-13 10:56:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-13 10:56:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2022-12-13 10:56:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2022-12-13 10:56:26,488 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 112 [2022-12-13 10:56:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:26,488 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2022-12-13 10:56:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-13 10:56:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2022-12-13 10:56:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 10:56:26,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:26,490 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-12-13 10:56:26,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 10:56:26,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:26,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 660367434, now seen corresponding path program 1 times [2022-12-13 10:56:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:26,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555570984] [2022-12-13 10:56:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:56:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:56:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:56:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 10:56:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 10:56:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 10:56:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 10:56:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 10:56:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 10:56:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-12-13 10:56:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 10:56:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555570984] [2022-12-13 10:56:28,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555570984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111260314] [2022-12-13 10:56:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:28,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:28,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:28,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 10:56:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 10:56:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:29,440 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 10:56:29,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-12-13 10:56:30,118 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 10:56:30,118 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 20 [2022-12-13 10:56:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 10:56:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:30,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111260314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:30,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:56:30,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2022-12-13 10:56:30,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432635661] [2022-12-13 10:56:30,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:30,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 10:56:30,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 10:56:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-12-13 10:56:30,786 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 23 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 13 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2022-12-13 10:56:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:35,099 INFO L93 Difference]: Finished difference Result 561 states and 826 transitions. [2022-12-13 10:56:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 10:56:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 13 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) Word has length 114 [2022-12-13 10:56:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:35,103 INFO L225 Difference]: With dead ends: 561 [2022-12-13 10:56:35,103 INFO L226 Difference]: Without dead ends: 474 [2022-12-13 10:56:35,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 10:56:35,105 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 616 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 743 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:35,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 833 Invalid, 4105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 3336 Invalid, 26 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 10:56:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-12-13 10:56:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 333. [2022-12-13 10:56:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 192 states have (on average 1.171875) internal successors, (225), 197 states have internal predecessors, (225), 112 states have call successors, (112), 26 states have call predecessors, (112), 28 states have return successors, (136), 109 states have call predecessors, (136), 110 states have call successors, (136) [2022-12-13 10:56:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 473 transitions. [2022-12-13 10:56:35,145 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 473 transitions. Word has length 114 [2022-12-13 10:56:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:35,146 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 473 transitions. [2022-12-13 10:56:35,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 13 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2022-12-13 10:56:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 473 transitions. [2022-12-13 10:56:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 10:56:35,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:35,147 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:35,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 10:56:35,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 10:56:35,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:35,351 INFO L85 PathProgramCache]: Analyzing trace with hash -448097721, now seen corresponding path program 1 times [2022-12-13 10:56:35,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:35,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405546681] [2022-12-13 10:56:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:56:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:56:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:56:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 10:56:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 10:56:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 10:56:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 10:56:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 10:56:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-12-13 10:56:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 10:56:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-12-13 10:56:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-13 10:56:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405546681] [2022-12-13 10:56:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405546681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564018895] [2022-12-13 10:56:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:38,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:38,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:38,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 10:56:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 10:56:38,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:38,762 INFO L321 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2022-12-13 10:56:38,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-12-13 10:56:38,854 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 10:56:38,855 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 23 [2022-12-13 10:56:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 10:56:38,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:39,263 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-12-13 10:56:39,296 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 10:56:39,296 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 24 [2022-12-13 10:56:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-12-13 10:56:39,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564018895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:56:39,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:56:39,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 33 [2022-12-13 10:56:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654795446] [2022-12-13 10:56:39,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:39,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 10:56:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 10:56:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 10:56:39,315 INFO L87 Difference]: Start difference. First operand 333 states and 473 transitions. Second operand has 33 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 16 states have call successors, (45), 7 states have call predecessors, (45), 10 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2022-12-13 10:56:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:49,721 INFO L93 Difference]: Finished difference Result 905 states and 1341 transitions. [2022-12-13 10:56:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 10:56:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 16 states have call successors, (45), 7 states have call predecessors, (45), 10 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) Word has length 125 [2022-12-13 10:56:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:49,724 INFO L225 Difference]: With dead ends: 905 [2022-12-13 10:56:49,724 INFO L226 Difference]: Without dead ends: 760 [2022-12-13 10:56:49,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 270 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=582, Invalid=4248, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 10:56:49,726 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 774 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 6275 mSolverCounterSat, 811 mSolverCounterUnsat, 76 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 7162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 6275 IncrementalHoareTripleChecker+Invalid, 76 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:49,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1032 Invalid, 7162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 6275 Invalid, 76 Unknown, 0 Unchecked, 8.7s Time] [2022-12-13 10:56:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-12-13 10:56:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 438. [2022-12-13 10:56:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 259 states have (on average 1.1737451737451738) internal successors, (304), 265 states have internal predecessors, (304), 140 states have call successors, (140), 35 states have call predecessors, (140), 38 states have return successors, (168), 137 states have call predecessors, (168), 137 states have call successors, (168) [2022-12-13 10:56:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 612 transitions. [2022-12-13 10:56:49,781 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 612 transitions. Word has length 125 [2022-12-13 10:56:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:49,781 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 612 transitions. [2022-12-13 10:56:49,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 16 states have call successors, (45), 7 states have call predecessors, (45), 10 states have return successors, (44), 13 states have call predecessors, (44), 16 states have call successors, (44) [2022-12-13 10:56:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 612 transitions. [2022-12-13 10:56:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-13 10:56:49,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:49,783 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2022-12-13 10:56:49,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 10:56:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 10:56:49,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2101213146, now seen corresponding path program 2 times [2022-12-13 10:56:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577334528] [2022-12-13 10:56:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:56:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:56:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 10:56:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 10:56:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 10:56:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 10:56:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 10:56:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 10:56:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 10:56:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 10:56:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 10:56:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:56:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:56:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-12-13 10:56:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 10:56:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577334528] [2022-12-13 10:56:50,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577334528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713275176] [2022-12-13 10:56:50,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:56:50,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:50,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:50,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 10:56:51,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:56:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 10:56:51,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:51,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:56:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:51,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 24 [2022-12-13 10:56:53,351 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_12| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_12|) 0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_12| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10|)))) is different from true [2022-12-13 10:56:55,430 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_13| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_13|) 0)))) is different from true [2022-12-13 10:56:57,493 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_14| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_14|) 0)))) is different from true [2022-12-13 10:56:59,555 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_15| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_15| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_15|) 0)))) is different from true [2022-12-13 10:56:59,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-12-13 10:56:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 0 refuted. 16 times theorem prover too weak. 31 trivial. 11 not checked. [2022-12-13 10:56:59,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:00,014 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 27 [2022-12-13 10:57:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-13 10:57:00,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713275176] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:00,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:00,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 15] total 30 [2022-12-13 10:57:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779078598] [2022-12-13 10:57:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:57:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 10:57:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 10:57:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=583, Unknown=4, NotChecked=204, Total=870 [2022-12-13 10:57:00,072 INFO L87 Difference]: Start difference. First operand 438 states and 612 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-13 10:57:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:01,554 INFO L93 Difference]: Finished difference Result 653 states and 920 transitions. [2022-12-13 10:57:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:57:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 122 [2022-12-13 10:57:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:01,557 INFO L225 Difference]: With dead ends: 653 [2022-12-13 10:57:01,557 INFO L226 Difference]: Without dead ends: 518 [2022-12-13 10:57:01,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 251 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=110, Invalid=832, Unknown=4, NotChecked=244, Total=1190 [2022-12-13 10:57:01,559 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 152 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 108 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:01,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 923 Invalid, 6 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 10:57:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-12-13 10:57:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 458. [2022-12-13 10:57:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 267 states have (on average 1.1685393258426966) internal successors, (312), 275 states have internal predecessors, (312), 151 states have call successors, (151), 35 states have call predecessors, (151), 39 states have return successors, (188), 147 states have call predecessors, (188), 148 states have call successors, (188) [2022-12-13 10:57:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 651 transitions. [2022-12-13 10:57:01,624 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 651 transitions. Word has length 122 [2022-12-13 10:57:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:01,624 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 651 transitions. [2022-12-13 10:57:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-13 10:57:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 651 transitions. [2022-12-13 10:57:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 10:57:01,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:01,626 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:01,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 10:57:01,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:01,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 565970727, now seen corresponding path program 2 times [2022-12-13 10:57:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:01,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484504219] [2022-12-13 10:57:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:57:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:57:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:57:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:57:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 10:57:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:57:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 10:57:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 10:57:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 10:57:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 10:57:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 10:57:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 10:57:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-12-13 10:57:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 10:57:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:57:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:57:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-12-13 10:57:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-12-13 10:57:02,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484504219] [2022-12-13 10:57:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484504219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614800058] [2022-12-13 10:57:02,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:57:02,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:02,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:02,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 10:57:03,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:57:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:57:03,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 10:57:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:03,550 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 10:57:03,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-13 10:57:03,867 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 10:57:03,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 10:57:04,000 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 10:57:04,002 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 10:57:04,015 WARN L859 $PredicateComparison]: unable to prove that (and (or (not (= |c_save_byte_from_array_#in~array#1.base| 0)) (not (= |c_save_byte_from_array_#in~array#1.offset| 0))) (exists ((v_ArrVal_730 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_730))) (exists ((v_ArrVal_729 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_729)))) is different from true [2022-12-13 10:57:04,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-13 10:57:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-13 10:57:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 2 not checked. [2022-12-13 10:57:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:17,937 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset| 8))) (or (forall ((v_ArrVal_738 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#old_byte_from_lhs~0#1.base| v_ArrVal_738) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) .cse0) 0))) (and (= 0 |c_ULTIMATE.start_aws_byte_cursor_eq_harness_#t~mem1209#1.offset|) (= 0 |c_ULTIMATE.start_aws_byte_cursor_eq_harness_#t~mem1209#1.base|)) (forall ((v_ArrVal_737 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#old_byte_from_lhs~0#1.base| v_ArrVal_737) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) .cse0) 0))))) is different from false [2022-12-13 10:57:17,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614800058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:17,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:17,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2022-12-13 10:57:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944255840] [2022-12-13 10:57:17,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:17,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 10:57:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 10:57:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1282, Unknown=4, NotChecked=146, Total=1560 [2022-12-13 10:57:17,941 INFO L87 Difference]: Start difference. First operand 458 states and 651 transitions. Second operand has 32 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (36), 11 states have call predecessors, (36), 13 states have call successors, (36) [2022-12-13 10:57:20,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:23,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:25,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:27,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:33,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:35,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:37,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:40,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:42,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:48,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:50,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:52,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:55,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:57,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:00,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:02,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:04,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:06,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:09,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:11,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:58:14,157 INFO L93 Difference]: Finished difference Result 1022 states and 1473 transitions. [2022-12-13 10:58:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 10:58:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (36), 11 states have call predecessors, (36), 13 states have call successors, (36) Word has length 125 [2022-12-13 10:58:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:58:14,162 INFO L225 Difference]: With dead ends: 1022 [2022-12-13 10:58:14,162 INFO L226 Difference]: Without dead ends: 848 [2022-12-13 10:58:14,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 193 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=691, Invalid=4853, Unknown=14, NotChecked=294, Total=5852 [2022-12-13 10:58:14,164 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 712 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 5936 mSolverCounterSat, 850 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 7235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 5936 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 46.3s IncrementalHoareTripleChecker+Time [2022-12-13 10:58:14,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1163 Invalid, 7235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 5936 Invalid, 24 Unknown, 425 Unchecked, 46.3s Time] [2022-12-13 10:58:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-12-13 10:58:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 668. [2022-12-13 10:58:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 398 states have (on average 1.178391959798995) internal successors, (469), 410 states have internal predecessors, (469), 210 states have call successors, (210), 54 states have call predecessors, (210), 59 states have return successors, (262), 203 states have call predecessors, (262), 204 states have call successors, (262) [2022-12-13 10:58:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 941 transitions. [2022-12-13 10:58:14,339 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 941 transitions. Word has length 125 [2022-12-13 10:58:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:58:14,339 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 941 transitions. [2022-12-13 10:58:14,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (37), 8 states have call predecessors, (37), 9 states have return successors, (36), 11 states have call predecessors, (36), 13 states have call successors, (36) [2022-12-13 10:58:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 941 transitions. [2022-12-13 10:58:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 10:58:14,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:58:14,344 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1] [2022-12-13 10:58:14,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 10:58:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 10:58:14,545 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:58:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash 627389311, now seen corresponding path program 3 times [2022-12-13 10:58:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76050189] [2022-12-13 10:58:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:14,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:58:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:58:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 10:58:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:58:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 10:58:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 10:58:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 10:58:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 10:58:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 10:58:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 10:58:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-12-13 10:58:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-12-13 10:58:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 10:58:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-12-13 10:58:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-12-13 10:58:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 10:58:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 10:58:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 10:58:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-13 10:58:15,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76050189] [2022-12-13 10:58:15,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76050189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456927100] [2022-12-13 10:58:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 10:58:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:15,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:15,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 10:58:16,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 10:58:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2378 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 10:58:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:18,630 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31|) (+ 8 |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30|)) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31|) (+ 8 |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30|)) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31| Int)) (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_31|) |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_30|) 18446744073709551616) 0))) is different from true [2022-12-13 10:58:30,725 WARN L233 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:58:44,840 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:58:58,949 WARN L233 SmtUtils]: Spent 14.03s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:59:13,128 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:59:27,291 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:59:41,465 WARN L233 SmtUtils]: Spent 14.03s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 10:59:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 10:59:41,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:59:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456927100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:59:44,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:59:44,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2022-12-13 10:59:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957790009] [2022-12-13 10:59:44,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:59:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 10:59:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 10:59:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=785, Unknown=2, NotChecked=56, Total=930 [2022-12-13 10:59:44,510 INFO L87 Difference]: Start difference. First operand 668 states and 941 transitions. Second operand has 23 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 7 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) [2022-12-13 10:59:47,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:09,739 INFO L93 Difference]: Finished difference Result 1319 states and 1834 transitions. [2022-12-13 11:00:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:00:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 7 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) Word has length 129 [2022-12-13 11:00:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:09,743 INFO L225 Difference]: With dead ends: 1319 [2022-12-13 11:00:09,743 INFO L226 Difference]: Without dead ends: 790 [2022-12-13 11:00:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 107.3s TimeCoverageRelationStatistics Valid=385, Invalid=2364, Unknown=11, NotChecked=102, Total=2862 [2022-12-13 11:00:09,745 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 234 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:09,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 945 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2264 Invalid, 1 Unknown, 210 Unchecked, 5.2s Time] [2022-12-13 11:00:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-12-13 11:00:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 740. [2022-12-13 11:00:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 462 states have (on average 1.1796536796536796) internal successors, (545), 477 states have internal predecessors, (545), 210 states have call successors, (210), 59 states have call predecessors, (210), 67 states have return successors, (273), 203 states have call predecessors, (273), 204 states have call successors, (273) [2022-12-13 11:00:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1028 transitions. [2022-12-13 11:00:09,855 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1028 transitions. Word has length 129 [2022-12-13 11:00:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:09,855 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1028 transitions. [2022-12-13 11:00:09,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 7 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) [2022-12-13 11:00:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1028 transitions. [2022-12-13 11:00:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-13 11:00:09,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:09,857 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:09,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:00:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:00:10,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -265929512, now seen corresponding path program 1 times [2022-12-13 11:00:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:10,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530682320] [2022-12-13 11:00:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:10,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:00:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 11:00:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 11:00:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 11:00:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 11:00:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-12-13 11:00:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-13 11:00:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530682320] [2022-12-13 11:00:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530682320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411316662] [2022-12-13 11:00:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:10,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:10,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:00:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:00:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-13 11:00:11,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:11,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411316662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:11,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:00:11,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-12-13 11:00:11,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712334442] [2022-12-13 11:00:11,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:11,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:00:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:00:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:00:11,085 INFO L87 Difference]: Start difference. First operand 740 states and 1028 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-13 11:00:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:11,558 INFO L93 Difference]: Finished difference Result 1323 states and 1867 transitions. [2022-12-13 11:00:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:00:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 131 [2022-12-13 11:00:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:11,561 INFO L225 Difference]: With dead ends: 1323 [2022-12-13 11:00:11,561 INFO L226 Difference]: Without dead ends: 744 [2022-12-13 11:00:11,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:00:11,563 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 19 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:11,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 597 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:00:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-12-13 11:00:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 740. [2022-12-13 11:00:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 462 states have (on average 1.1623376623376624) internal successors, (537), 477 states have internal predecessors, (537), 210 states have call successors, (210), 59 states have call predecessors, (210), 67 states have return successors, (273), 203 states have call predecessors, (273), 204 states have call successors, (273) [2022-12-13 11:00:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1020 transitions. [2022-12-13 11:00:11,663 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1020 transitions. Word has length 131 [2022-12-13 11:00:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:11,663 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1020 transitions. [2022-12-13 11:00:11,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-13 11:00:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1020 transitions. [2022-12-13 11:00:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-13 11:00:11,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:11,665 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:11,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:00:11,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:00:11,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2132638186, now seen corresponding path program 1 times [2022-12-13 11:00:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:11,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126041093] [2022-12-13 11:00:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:00:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 11:00:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 11:00:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 11:00:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 11:00:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-12-13 11:00:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-13 11:00:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126041093] [2022-12-13 11:00:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126041093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883011290] [2022-12-13 11:00:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:12,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:12,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:12,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:00:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:00:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-13 11:00:12,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:12,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883011290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:12,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:00:12,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-13 11:00:12,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131542496] [2022-12-13 11:00:12,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:12,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:00:12,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:12,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:00:12,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:00:12,895 INFO L87 Difference]: Start difference. First operand 740 states and 1020 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-13 11:00:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:13,181 INFO L93 Difference]: Finished difference Result 1313 states and 1848 transitions. [2022-12-13 11:00:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:00:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 131 [2022-12-13 11:00:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:13,184 INFO L225 Difference]: With dead ends: 1313 [2022-12-13 11:00:13,184 INFO L226 Difference]: Without dead ends: 734 [2022-12-13 11:00:13,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:00:13,186 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 9 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:13,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 442 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:00:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-12-13 11:00:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 732. [2022-12-13 11:00:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 454 states have (on average 1.1387665198237886) internal successors, (517), 469 states have internal predecessors, (517), 210 states have call successors, (210), 59 states have call predecessors, (210), 67 states have return successors, (273), 203 states have call predecessors, (273), 204 states have call successors, (273) [2022-12-13 11:00:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1000 transitions. [2022-12-13 11:00:13,353 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1000 transitions. Word has length 131 [2022-12-13 11:00:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:13,353 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 1000 transitions. [2022-12-13 11:00:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-13 11:00:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1000 transitions. [2022-12-13 11:00:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 11:00:13,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:13,355 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:13,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 11:00:13,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:13,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash 140507871, now seen corresponding path program 1 times [2022-12-13 11:00:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:13,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459319160] [2022-12-13 11:00:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:00:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 11:00:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 11:00:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 11:00:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 11:00:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-12-13 11:00:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-13 11:00:14,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459319160] [2022-12-13 11:00:14,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459319160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:14,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:14,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 11:00:14,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303541784] [2022-12-13 11:00:14,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:14,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:00:14,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:00:14,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:00:14,498 INFO L87 Difference]: Start difference. First operand 732 states and 1000 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-13 11:00:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:15,535 INFO L93 Difference]: Finished difference Result 765 states and 1037 transitions. [2022-12-13 11:00:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:00:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2022-12-13 11:00:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:15,540 INFO L225 Difference]: With dead ends: 765 [2022-12-13 11:00:15,540 INFO L226 Difference]: Without dead ends: 763 [2022-12-13 11:00:15,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:00:15,541 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 93 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:15,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 987 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:00:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-12-13 11:00:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 734. [2022-12-13 11:00:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 457 states have (on average 1.1378555798687089) internal successors, (520), 472 states have internal predecessors, (520), 208 states have call successors, (208), 60 states have call predecessors, (208), 68 states have return successors, (271), 201 states have call predecessors, (271), 202 states have call successors, (271) [2022-12-13 11:00:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 999 transitions. [2022-12-13 11:00:15,666 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 999 transitions. Word has length 133 [2022-12-13 11:00:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:15,666 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 999 transitions. [2022-12-13 11:00:15,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 11 states have internal predecessors, (57), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-12-13 11:00:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 999 transitions. [2022-12-13 11:00:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 11:00:15,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:15,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:15,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:00:15,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash -226410282, now seen corresponding path program 1 times [2022-12-13 11:00:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:15,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662159954] [2022-12-13 11:00:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 11:00:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 11:00:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 11:00:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 11:00:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 11:00:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 11:00:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 11:00:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-13 11:00:16,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662159954] [2022-12-13 11:00:16,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662159954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:16,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:16,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 11:00:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123937293] [2022-12-13 11:00:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:00:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:00:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:00:16,192 INFO L87 Difference]: Start difference. First operand 734 states and 999 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-13 11:00:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:16,781 INFO L93 Difference]: Finished difference Result 762 states and 1029 transitions. [2022-12-13 11:00:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:00:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 125 [2022-12-13 11:00:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:16,785 INFO L225 Difference]: With dead ends: 762 [2022-12-13 11:00:16,785 INFO L226 Difference]: Without dead ends: 760 [2022-12-13 11:00:16,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:00:16,785 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:16,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 598 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:00:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-12-13 11:00:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 753. [2022-12-13 11:00:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 469 states have (on average 1.1343283582089552) internal successors, (532), 484 states have internal predecessors, (532), 211 states have call successors, (211), 64 states have call predecessors, (211), 72 states have return successors, (274), 204 states have call predecessors, (274), 205 states have call successors, (274) [2022-12-13 11:00:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1017 transitions. [2022-12-13 11:00:16,887 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1017 transitions. Word has length 125 [2022-12-13 11:00:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:16,887 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1017 transitions. [2022-12-13 11:00:16,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-13 11:00:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1017 transitions. [2022-12-13 11:00:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 11:00:16,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:16,889 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:00:16,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1055067176, now seen corresponding path program 1 times [2022-12-13 11:00:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620618019] [2022-12-13 11:00:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 11:00:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 11:00:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 11:00:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 11:00:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 11:00:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 11:00:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 11:00:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-12-13 11:00:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 11:00:18,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620618019] [2022-12-13 11:00:18,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620618019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:18,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:18,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 11:00:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997068600] [2022-12-13 11:00:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:18,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:00:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:00:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:00:18,775 INFO L87 Difference]: Start difference. First operand 753 states and 1017 transitions. Second operand has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 11:00:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:19,681 INFO L93 Difference]: Finished difference Result 825 states and 1126 transitions. [2022-12-13 11:00:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:00:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 133 [2022-12-13 11:00:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:19,684 INFO L225 Difference]: With dead ends: 825 [2022-12-13 11:00:19,684 INFO L226 Difference]: Without dead ends: 823 [2022-12-13 11:00:19,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-13 11:00:19,685 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 210 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:19,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 646 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:00:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-12-13 11:00:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 781. [2022-12-13 11:00:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 485 states have (on average 1.131958762886598) internal successors, (549), 500 states have internal predecessors, (549), 220 states have call successors, (220), 67 states have call predecessors, (220), 75 states have return successors, (286), 213 states have call predecessors, (286), 214 states have call successors, (286) [2022-12-13 11:00:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1055 transitions. [2022-12-13 11:00:19,791 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1055 transitions. Word has length 133 [2022-12-13 11:00:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:19,791 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1055 transitions. [2022-12-13 11:00:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 11:00:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1055 transitions. [2022-12-13 11:00:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 11:00:19,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:19,793 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 11:00:19,793 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1546131138, now seen corresponding path program 1 times [2022-12-13 11:00:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418569792] [2022-12-13 11:00:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:00:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 11:00:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 11:00:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 11:00:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 11:00:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:00:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-12-13 11:00:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-12-13 11:00:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-12-13 11:00:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 11:00:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418569792] [2022-12-13 11:00:20,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418569792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817167670] [2022-12-13 11:00:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:20,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:20,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:20,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:20,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:00:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2801 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 11:00:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:20,868 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:00:20,871 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:00:21,124 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-13 11:00:21,126 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-13 11:00:21,129 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2022-12-13 11:00:21,130 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2022-12-13 11:00:21,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 11:00:21,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 11:00:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 91 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-13 11:00:21,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:21,553 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 24 [2022-12-13 11:00:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 11:00:21,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817167670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:00:21,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:00:21,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 25 [2022-12-13 11:00:21,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225956896] [2022-12-13 11:00:21,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:21,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 11:00:21,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:21,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 11:00:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:00:21,572 INFO L87 Difference]: Start difference. First operand 781 states and 1055 transitions. Second operand has 25 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 10 states have call successors, (50), 7 states have call predecessors, (50), 9 states have return successors, (49), 9 states have call predecessors, (49), 10 states have call successors, (49) [2022-12-13 11:00:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:25,668 INFO L93 Difference]: Finished difference Result 1831 states and 2508 transitions. [2022-12-13 11:00:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:00:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 10 states have call successors, (50), 7 states have call predecessors, (50), 9 states have return successors, (49), 9 states have call predecessors, (49), 10 states have call successors, (49) Word has length 145 [2022-12-13 11:00:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:25,673 INFO L225 Difference]: With dead ends: 1831 [2022-12-13 11:00:25,673 INFO L226 Difference]: Without dead ends: 1337 [2022-12-13 11:00:25,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 313 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 11:00:25,675 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 366 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 4878 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 5231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:25,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2134 Invalid, 5231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 4878 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 11:00:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-12-13 11:00:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1121. [2022-12-13 11:00:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 705 states have (on average 1.127659574468085) internal successors, (795), 727 states have internal predecessors, (795), 302 states have call successors, (302), 100 states have call predecessors, (302), 113 states have return successors, (394), 293 states have call predecessors, (394), 294 states have call successors, (394) [2022-12-13 11:00:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1491 transitions. [2022-12-13 11:00:25,844 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1491 transitions. Word has length 145 [2022-12-13 11:00:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:25,845 INFO L495 AbstractCegarLoop]: Abstraction has 1121 states and 1491 transitions. [2022-12-13 11:00:25,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 10 states have call successors, (50), 7 states have call predecessors, (50), 9 states have return successors, (49), 9 states have call predecessors, (49), 10 states have call successors, (49) [2022-12-13 11:00:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1491 transitions. [2022-12-13 11:00:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-13 11:00:25,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:25,847 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:25,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:00:26,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:00:26,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -416619008, now seen corresponding path program 1 times [2022-12-13 11:00:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:26,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786354926] [2022-12-13 11:00:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:00:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:00:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:00:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:00:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:00:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 11:00:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 11:00:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 11:00:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-12-13 11:00:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-12-13 11:00:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:00:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:00:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-12-13 11:00:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 11:00:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-12-13 11:00:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-13 11:00:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786354926] [2022-12-13 11:00:26,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786354926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182504228] [2022-12-13 11:00:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:26,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:26,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:26,779 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:26,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:00:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 11:00:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:27,504 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:00:27,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2022-12-13 11:00:28,265 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 11:00:28,265 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 19 [2022-12-13 11:00:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 67 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 11:00:28,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:28,807 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-12-13 11:00:28,953 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 11:00:28,953 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 25 [2022-12-13 11:00:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-13 11:00:28,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182504228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:00:28,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:00:28,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 28 [2022-12-13 11:00:28,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566233409] [2022-12-13 11:00:28,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:00:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:00:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-12-13 11:00:28,978 INFO L87 Difference]: Start difference. First operand 1121 states and 1491 transitions. Second operand has 28 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 13 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 11 states have call predecessors, (44), 13 states have call successors, (44) [2022-12-13 11:00:32,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:37,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:40,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:42,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:44,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:45,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:47,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:51,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:53,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:55,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:59,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:01,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:05,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:06,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:08,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:10,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:14,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:16,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:17,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:24,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:25,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:30,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:31,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:33,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:01:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:01:33,184 INFO L93 Difference]: Finished difference Result 2327 states and 3032 transitions. [2022-12-13 11:01:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:01:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 13 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 11 states have call predecessors, (44), 13 states have call successors, (44) Word has length 141 [2022-12-13 11:01:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:01:33,189 INFO L225 Difference]: With dead ends: 2327 [2022-12-13 11:01:33,189 INFO L226 Difference]: Without dead ends: 1686 [2022-12-13 11:01:33,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 289 SyntacticMatches, 18 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=423, Invalid=2644, Unknown=13, NotChecked=0, Total=3080 [2022-12-13 11:01:33,191 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 453 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 4189 mSolverCounterSat, 427 mSolverCounterUnsat, 99 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 4189 IncrementalHoareTripleChecker+Invalid, 99 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:01:33,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1174 Invalid, 4715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 4189 Invalid, 99 Unknown, 0 Unchecked, 62.7s Time] [2022-12-13 11:01:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-12-13 11:01:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1345. [2022-12-13 11:01:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 870 states have (on average 1.1275862068965516) internal successors, (981), 895 states have internal predecessors, (981), 335 states have call successors, (335), 123 states have call predecessors, (335), 139 states have return successors, (431), 326 states have call predecessors, (431), 328 states have call successors, (431) [2022-12-13 11:01:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1747 transitions. [2022-12-13 11:01:33,397 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1747 transitions. Word has length 141 [2022-12-13 11:01:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:01:33,397 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1747 transitions. [2022-12-13 11:01:33,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 13 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 11 states have call predecessors, (44), 13 states have call successors, (44) [2022-12-13 11:01:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1747 transitions. [2022-12-13 11:01:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-13 11:01:33,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:01:33,399 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:33,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 11:01:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:01:33,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:01:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1939413157, now seen corresponding path program 2 times [2022-12-13 11:01:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62753640] [2022-12-13 11:01:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:33,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:01:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:01:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:01:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:01:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:01:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:01:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:01:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:01:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:01:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 11:01:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 11:01:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 11:01:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-12-13 11:01:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-12-13 11:01:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-12-13 11:01:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:01:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:01:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-12-13 11:01:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-12-13 11:01:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 11:01:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-13 11:01:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62753640] [2022-12-13 11:01:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62753640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410023038] [2022-12-13 11:01:36,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:01:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:01:36,233 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:01:36,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:01:36,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:01:36,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:01:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 11:01:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:36,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:01:36,768 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:36,771 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:37,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 11:01:37,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 11:01:37,272 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-12-13 11:01:37,274 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-12-13 11:01:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-13 11:01:37,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:01:37,467 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset| 8))) (and (forall ((v_ArrVal_1584 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| v_ArrVal_1584) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_1586 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| v_ArrVal_1586) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) .cse0) 0)))) is different from false [2022-12-13 11:01:37,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410023038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:37,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:01:37,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2022-12-13 11:01:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5323172] [2022-12-13 11:01:37,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:01:37,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 11:01:37,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:01:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 11:01:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1030, Unknown=1, NotChecked=64, Total=1190 [2022-12-13 11:01:37,475 INFO L87 Difference]: Start difference. First operand 1345 states and 1747 transitions. Second operand has 32 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 13 states have call successors, (41), 5 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 13 states have call successors, (40) [2022-12-13 11:01:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:01:43,178 INFO L93 Difference]: Finished difference Result 2218 states and 2865 transitions. [2022-12-13 11:01:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 11:01:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 13 states have call successors, (41), 5 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 13 states have call successors, (40) Word has length 147 [2022-12-13 11:01:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:01:43,184 INFO L225 Difference]: With dead ends: 2218 [2022-12-13 11:01:43,184 INFO L226 Difference]: Without dead ends: 1743 [2022-12-13 11:01:43,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=411, Invalid=3624, Unknown=1, NotChecked=124, Total=4160 [2022-12-13 11:01:43,186 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 466 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 5635 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 5635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:01:43,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1218 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 5635 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-13 11:01:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-12-13 11:01:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1520. [2022-12-13 11:01:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 991 states have (on average 1.1261352169525731) internal successors, (1116), 1016 states have internal predecessors, (1116), 370 states have call successors, (370), 142 states have call predecessors, (370), 158 states have return successors, (473), 361 states have call predecessors, (473), 361 states have call successors, (473) [2022-12-13 11:01:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1959 transitions. [2022-12-13 11:01:43,421 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1959 transitions. Word has length 147 [2022-12-13 11:01:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:01:43,422 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1959 transitions. [2022-12-13 11:01:43,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 13 states have call successors, (41), 5 states have call predecessors, (41), 9 states have return successors, (40), 12 states have call predecessors, (40), 13 states have call successors, (40) [2022-12-13 11:01:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1959 transitions. [2022-12-13 11:01:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 11:01:43,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:01:43,424 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:43,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 11:01:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:01:43,626 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:01:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 15876341, now seen corresponding path program 1 times [2022-12-13 11:01:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561801978] [2022-12-13 11:01:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:01:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:01:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:01:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:01:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:01:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 11:01:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:01:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:01:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:01:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 11:01:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 11:01:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 11:01:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 11:01:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 11:01:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 11:01:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 11:01:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-12-13 11:01:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 11:01:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 11:01:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-12-13 11:01:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-12-13 11:01:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-12-13 11:01:45,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561801978] [2022-12-13 11:01:45,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561801978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064874832] [2022-12-13 11:01:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:01:45,077 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:01:45,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ae0268a-5eaa-4645-a0fb-e0cb8d149882/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:01:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-13 11:01:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:45,482 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:45,484 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:45,851 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-12-13 11:01:45,853 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:45,858 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-12-13 11:01:45,860 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:01:49,052 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 29 [2022-12-13 11:01:49,135 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 11:01:49,135 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 13 [2022-12-13 11:01:49,138 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 11:01:49,139 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 13 [2022-12-13 11:01:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 11:01:49,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:04:15,560 WARN L233 SmtUtils]: Spent 2.20m on a formula simplification that was a NOOP. DAG size: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:08:57,916 WARN L233 SmtUtils]: Spent 4.15m on a formula simplification that was a NOOP. DAG size: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)