./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/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_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/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_537db7a7-1531-4022-ac54-e8877d8596b0/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 c8c1e832189dd055953efd5b59586c9715f7fa12a58718e8966fcba656bebf80 --- 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 12:17:26,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:17:26,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:17:26,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:17:26,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:17:26,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:17:26,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:17:26,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:17:26,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:17:26,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:17:26,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:17:26,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:17:26,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:17:26,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:17:26,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:17:26,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:17:26,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:17:26,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:17:26,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:17:26,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:17:26,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:17:26,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:17:26,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:17:26,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:17:26,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:17:26,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:17:26,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:17:26,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:17:26,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:17:26,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:17:26,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:17:26,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:17:26,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:17:26,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:17:26,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:17:26,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:17:26,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:17:26,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:17:26,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:17:26,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:17:26,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:17:26,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 12:17:26,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:17:26,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:17:26,471 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:17:26,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:17:26,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:17:26,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:17:26,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:17:26,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:17:26,478 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:17:26,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:17:26,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:17:26,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:17:26,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:17:26,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:17:26,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:17:26,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:17:26,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:17:26,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:17:26,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:17:26,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:17:26,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:17:26,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:17:26,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:17:26,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:17:26,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:17:26,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:17:26,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:17:26,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:17:26,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:17:26,482 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:17:26,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:17:26,482 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:17:26,483 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_537db7a7-1531-4022-ac54-e8877d8596b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8c1e832189dd055953efd5b59586c9715f7fa12a58718e8966fcba656bebf80 [2022-12-13 12:17:26,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:17:26,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:17:26,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:17:26,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:17:26,697 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:17:26,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2022-12-13 12:17:29,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:17:29,590 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:17:29,591 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2022-12-13 12:17:29,608 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/data/11b1d00e3/6a62e991295f4f9eb5c0e5756a2a18d6/FLAGc1cbc021c [2022-12-13 12:17:29,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/data/11b1d00e3/6a62e991295f4f9eb5c0e5756a2a18d6 [2022-12-13 12:17:29,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:17:29,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:17:29,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:17:29,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:17:29,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:17:29,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:17:29" (1/1) ... [2022-12-13 12:17:29,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b636144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:29, skipping insertion in model container [2022-12-13 12:17:29,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:17:29" (1/1) ... [2022-12-13 12:17:29,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:17:29,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:17:30,187 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_537db7a7-1531-4022-ac54-e8877d8596b0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2022-12-13 12:17:30,194 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_537db7a7-1531-4022-ac54-e8877d8596b0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2022-12-13 12:17:30,832 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 12:17:30,877 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:30,887 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:30,898 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,899 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,899 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,900 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,901 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,906 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:30,915 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,915 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,917 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,918 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:30,991 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:30,991 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:30,992 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:30,996 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 12:17:30,999 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 12:17:30,999 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 12:17:31,113 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,218 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 12:17:31,219 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 12:17:31,220 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 12:17:31,221 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 12:17:31,222 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 12:17:31,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 12:17:31,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 12:17:31,225 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 12:17:31,226 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 12:17:31,226 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 12:17:31,227 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 12:17:31,361 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,363 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,363 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,364 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,387 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,409 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 12:17:31,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:17:31,444 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:17:31,456 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_537db7a7-1531-4022-ac54-e8877d8596b0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2022-12-13 12:17:31,456 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_537db7a7-1531-4022-ac54-e8877d8596b0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2022-12-13 12:17:31,486 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 12:17:31,491 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,497 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,501 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,501 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,502 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,502 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,503 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,505 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,510 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,510 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,511 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,512 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,518 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:31,519 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:31,519 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:17:31,522 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 12:17:31,523 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 12:17:31,524 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 12:17:31,526 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,546 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 12:17:31,546 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 12:17:31,548 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 12:17:31,548 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 12:17:31,549 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 12:17:31,549 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 12:17:31,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 12:17:31,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 12:17:31,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 12:17:31,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 12:17:31,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 12:17:31,569 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,570 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,570 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,570 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:17:31,574 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:17:31,582 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 12:17:31,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:17:31,813 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:17:31,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31 WrapperNode [2022-12-13 12:17:31,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:17:31,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:17:31,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:17:31,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:17:31,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:31,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:31,952 INFO L138 Inliner]: procedures = 689, calls = 1496, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 597 [2022-12-13 12:17:31,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:17:31,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:17:31,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:17:31,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:17:31,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:31,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:31,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:31,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:17:32,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:17:32,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:17:32,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:17:32,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (1/1) ... [2022-12-13 12:17:32,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:17:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:32,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:17:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:17:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-13 12:17:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-12-13 12:17:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-12-13 12:17:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-13 12:17:32,115 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:17:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-12-13 12:17:32,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 12:17:32,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:17:32,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:17:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2022-12-13 12:17:32,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-13 12:17:32,117 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-12-13 12:17:32,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-12-13 12:17:32,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-12-13 12:17:32,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 12:17:32,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 12:17:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-13 12:17:32,118 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-12-13 12:17:32,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:17:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-12-13 12:17:32,118 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-12-13 12:17:32,119 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-12-13 12:17:32,119 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-12-13 12:17:32,119 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-12-13 12:17:32,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-12-13 12:17:32,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:17:32,326 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:17:32,328 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:17:33,002 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:17:33,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:17:33,007 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 12:17:33,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:17:33 BoogieIcfgContainer [2022-12-13 12:17:33,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:17:33,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:17:33,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:17:33,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:17:33,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:17:29" (1/3) ... [2022-12-13 12:17:33,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb10bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:17:33, skipping insertion in model container [2022-12-13 12:17:33,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:17:31" (2/3) ... [2022-12-13 12:17:33,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb10bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:17:33, skipping insertion in model container [2022-12-13 12:17:33,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:17:33" (3/3) ... [2022-12-13 12:17:33,016 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness_negated.i [2022-12-13 12:17:33,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:17:33,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:17:33,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:17:33,089 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;@5e06bb97, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:17:33,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 12:17:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-13 12:17:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-13 12:17:33,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:33,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:33,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2022-12-13 12:17:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444131356] [2022-12-13 12:17:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:17:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:17:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 12:17:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 12:17:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 12:17:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 12:17:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 12:17:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 12:17:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-12-13 12:17:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-12-13 12:17:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 12:17:33,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:33,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444131356] [2022-12-13 12:17:33,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444131356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:33,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:33,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:17:33,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816834008] [2022-12-13 12:17:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:17:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:33,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:17:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:17:33,671 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 12:17:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:34,132 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2022-12-13 12:17:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:17:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2022-12-13 12:17:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:34,141 INFO L225 Difference]: With dead ends: 361 [2022-12-13 12:17:34,141 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 12:17:34,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 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 12:17:34,148 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:34,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 258 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:17:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 12:17:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2022-12-13 12:17:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-13 12:17:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2022-12-13 12:17:34,205 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2022-12-13 12:17:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:34,206 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2022-12-13 12:17:34,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 12:17:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2022-12-13 12:17:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-13 12:17:34,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:34,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:34,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:17:34,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2022-12-13 12:17:34,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:34,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473214588] [2022-12-13 12:17:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:17:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:17:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 12:17:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 12:17:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 12:17:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 12:17:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 12:17:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 12:17:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 12:17:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-12-13 12:17:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-12-13 12:17:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-13 12:17:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:34,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473214588] [2022-12-13 12:17:34,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473214588] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:34,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:34,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 12:17:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145331539] [2022-12-13 12:17:34,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:34,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:17:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:17:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:17:34,811 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-13 12:17:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:35,416 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2022-12-13 12:17:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:17:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2022-12-13 12:17:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:35,420 INFO L225 Difference]: With dead ends: 341 [2022-12-13 12:17:35,420 INFO L226 Difference]: Without dead ends: 245 [2022-12-13 12:17:35,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:17:35,422 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 282 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:35,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 547 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:17:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-12-13 12:17:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2022-12-13 12:17:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-13 12:17:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2022-12-13 12:17:35,446 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2022-12-13 12:17:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:35,447 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2022-12-13 12:17:35,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-13 12:17:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2022-12-13 12:17:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 12:17:35,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:35,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:35,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:17:35,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2022-12-13 12:17:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:35,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272730550] [2022-12-13 12:17:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:35,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:17:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:17:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 12:17:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 12:17:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 12:17:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:17:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 12:17:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:17:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 12:17:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 12:17:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 12:17:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 12:17:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 12:17:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-12-13 12:17:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-12-13 12:17:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-13 12:17:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:36,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272730550] [2022-12-13 12:17:36,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272730550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:36,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:36,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 12:17:36,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889475863] [2022-12-13 12:17:36,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:17:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:17:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:17:36,065 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-13 12:17:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:36,805 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2022-12-13 12:17:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:17:36,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2022-12-13 12:17:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:36,807 INFO L225 Difference]: With dead ends: 371 [2022-12-13 12:17:36,807 INFO L226 Difference]: Without dead ends: 226 [2022-12-13 12:17:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:17:36,808 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 243 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 793 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:17:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-13 12:17:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2022-12-13 12:17:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2022-12-13 12:17:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-12-13 12:17:36,821 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2022-12-13 12:17:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:36,821 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-12-13 12:17:36,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-13 12:17:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-12-13 12:17:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 12:17:36,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:36,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:36,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:17:36,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2022-12-13 12:17:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:36,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118757248] [2022-12-13 12:17:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:36,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968373110] [2022-12-13 12:17:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:36,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:36,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:17:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:17:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:17:37,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118757248] [2022-12-13 12:17:37,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968373110] [2022-12-13 12:17:37,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968373110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:37,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:37,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:17:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128859802] [2022-12-13 12:17:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:17:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:17:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:17:37,366 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-13 12:17:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:37,517 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2022-12-13 12:17:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:17:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2022-12-13 12:17:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:37,519 INFO L225 Difference]: With dead ends: 261 [2022-12-13 12:17:37,520 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 12:17:37,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:17:37,521 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:37,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 781 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:17:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 12:17:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-12-13 12:17:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2022-12-13 12:17:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-12-13 12:17:37,539 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2022-12-13 12:17:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:37,539 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-12-13 12:17:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-13 12:17:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-12-13 12:17:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-13 12:17:37,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:37,542 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:37,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:17:37,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:37,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2022-12-13 12:17:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:37,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803804247] [2022-12-13 12:17:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:37,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:37,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702352835] [2022-12-13 12:17:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:37,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:37,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:37,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:17:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:17:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 12:17:38,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:38,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803804247] [2022-12-13 12:17:38,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702352835] [2022-12-13 12:17:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702352835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:38,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:38,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 12:17:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496868752] [2022-12-13 12:17:38,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:38,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:17:38,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:17:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:17:38,391 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-13 12:17:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:38,633 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2022-12-13 12:17:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:17:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2022-12-13 12:17:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:38,635 INFO L225 Difference]: With dead ends: 274 [2022-12-13 12:17:38,635 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 12:17:38,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 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 12:17:38,637 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:38,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1041 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:17:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 12:17:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-12-13 12:17:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-12-13 12:17:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2022-12-13 12:17:38,652 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2022-12-13 12:17:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:38,652 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2022-12-13 12:17:38,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-13 12:17:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2022-12-13 12:17:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 12:17:38,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:38,655 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:38,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:17:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:38,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2022-12-13 12:17:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:38,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384483842] [2022-12-13 12:17:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:39,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:39,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718176164] [2022-12-13 12:17:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:39,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:17:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:17:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 12:17:39,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384483842] [2022-12-13 12:17:39,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718176164] [2022-12-13 12:17:39,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718176164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:39,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:39,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:17:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278192289] [2022-12-13 12:17:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:17:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:17:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:17:39,560 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:39,768 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2022-12-13 12:17:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:17:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-12-13 12:17:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:39,770 INFO L225 Difference]: With dead ends: 286 [2022-12-13 12:17:39,770 INFO L226 Difference]: Without dead ends: 180 [2022-12-13 12:17:39,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:17:39,771 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 23 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:39,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 893 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:17:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-13 12:17:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2022-12-13 12:17:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-12-13 12:17:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2022-12-13 12:17:39,780 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2022-12-13 12:17:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:39,780 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2022-12-13 12:17:39,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2022-12-13 12:17:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 12:17:39,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:39,782 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:39,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:17:39,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:17:39,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2022-12-13 12:17:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492990480] [2022-12-13 12:17:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:40,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222631702] [2022-12-13 12:17:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:40,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:40,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:17:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:17:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 12:17:40,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:40,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492990480] [2022-12-13 12:17:40,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:40,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222631702] [2022-12-13 12:17:40,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222631702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:40,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:40,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:17:40,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881703742] [2022-12-13 12:17:40,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:40,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:17:40,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:40,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:17:40,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:17:40,550 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:40,579 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2022-12-13 12:17:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:17:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-12-13 12:17:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:40,581 INFO L225 Difference]: With dead ends: 274 [2022-12-13 12:17:40,581 INFO L226 Difference]: Without dead ends: 170 [2022-12-13 12:17:40,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:17:40,583 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:40,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:17:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-13 12:17:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-12-13 12:17:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-12-13 12:17:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-12-13 12:17:40,596 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2022-12-13 12:17:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:40,596 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-12-13 12:17:40,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-12-13 12:17:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 12:17:40,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:40,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:40,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:17:40,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:40,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2022-12-13 12:17:40,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379730047] [2022-12-13 12:17:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:40,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:40,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912854875] [2022-12-13 12:17:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:40,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:40,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:40,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:17:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:41,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 12:17:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:41,509 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 11 treesize of output 5 [2022-12-13 12:17:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 12:17:41,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379730047] [2022-12-13 12:17:41,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912854875] [2022-12-13 12:17:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912854875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:41,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 12:17:41,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529615103] [2022-12-13 12:17:41,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:41,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:17:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:41,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:17:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:17:41,535 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-12-13 12:17:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:41,964 INFO L93 Difference]: Finished difference Result 308 states and 385 transitions. [2022-12-13 12:17:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:17:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-12-13 12:17:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:41,967 INFO L225 Difference]: With dead ends: 308 [2022-12-13 12:17:41,967 INFO L226 Difference]: Without dead ends: 196 [2022-12-13 12:17:41,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:17:41,968 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 115 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:41,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1627 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:17:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-13 12:17:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2022-12-13 12:17:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 35 states have call successors, (35), 17 states have call predecessors, (35), 19 states have return successors, (38), 35 states have call predecessors, (38), 34 states have call successors, (38) [2022-12-13 12:17:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2022-12-13 12:17:41,979 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 176 [2022-12-13 12:17:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:41,979 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2022-12-13 12:17:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-12-13 12:17:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2022-12-13 12:17:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 12:17:41,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:41,982 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:41,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:17:42,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:42,182 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash -914990395, now seen corresponding path program 1 times [2022-12-13 12:17:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486387528] [2022-12-13 12:17:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:42,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:42,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282242687] [2022-12-13 12:17:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:42,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:17:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:17:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 12:17:42,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486387528] [2022-12-13 12:17:42,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282242687] [2022-12-13 12:17:42,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282242687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:42,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:42,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:17:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109949890] [2022-12-13 12:17:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:17:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:17:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:17:42,657 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:42,696 INFO L93 Difference]: Finished difference Result 294 states and 364 transitions. [2022-12-13 12:17:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:17:42,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-12-13 12:17:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:42,697 INFO L225 Difference]: With dead ends: 294 [2022-12-13 12:17:42,697 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 12:17:42,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:17:42,698 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 9 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:42,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 775 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:17:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 12:17:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2022-12-13 12:17:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 129 states have internal predecessors, (152), 35 states have call successors, (35), 17 states have call predecessors, (35), 19 states have return successors, (38), 35 states have call predecessors, (38), 34 states have call successors, (38) [2022-12-13 12:17:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 225 transitions. [2022-12-13 12:17:42,706 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 225 transitions. Word has length 176 [2022-12-13 12:17:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:42,706 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 225 transitions. [2022-12-13 12:17:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 225 transitions. [2022-12-13 12:17:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 12:17:42,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:42,708 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:42,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:17:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 12:17:42,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1102833285, now seen corresponding path program 1 times [2022-12-13 12:17:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:42,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128992011] [2022-12-13 12:17:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:42,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:42,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700071420] [2022-12-13 12:17:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:42,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:42,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:42,958 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:42,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:17:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:17:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 12:17:43,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:17:43,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128992011] [2022-12-13 12:17:43,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700071420] [2022-12-13 12:17:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700071420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:43,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:43,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:17:43,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183838137] [2022-12-13 12:17:43,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:43,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:17:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:17:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:17:43,355 INFO L87 Difference]: Start difference. First operand 181 states and 225 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:17:43,383 INFO L93 Difference]: Finished difference Result 315 states and 397 transitions. [2022-12-13 12:17:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:17:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2022-12-13 12:17:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:17:43,384 INFO L225 Difference]: With dead ends: 315 [2022-12-13 12:17:43,384 INFO L226 Difference]: Without dead ends: 181 [2022-12-13 12:17:43,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:17:43,385 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 7 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:17:43,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 589 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:17:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-13 12:17:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-12-13 12:17:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 129 states have internal predecessors, (151), 35 states have call successors, (35), 17 states have call predecessors, (35), 19 states have return successors, (38), 35 states have call predecessors, (38), 34 states have call successors, (38) [2022-12-13 12:17:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2022-12-13 12:17:43,393 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 176 [2022-12-13 12:17:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:17:43,394 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2022-12-13 12:17:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 12:17:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2022-12-13 12:17:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-13 12:17:43,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:17:43,396 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:43,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:17:43,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:17:43,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:17:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 632495137, now seen corresponding path program 1 times [2022-12-13 12:17:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050796924] [2022-12-13 12:17:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:43,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:17:43,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204114931] [2022-12-13 12:17:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:43,690 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:17:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 12:17:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:44,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:17:44,444 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 12:17:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:17:46,504 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 23 treesize of output 22 [2022-12-13 12:17:49,193 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_916 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_916))) is different from true [2022-12-13 12:17:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 52 proven. 19 refuted. 3 times theorem prover too weak. 32 trivial. 3 not checked. [2022-12-13 12:17:49,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:50,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050796924] [2022-12-13 12:17:50,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:17:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204114931] [2022-12-13 12:17:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204114931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:50,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:17:50,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-12-13 12:17:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126254029] [2022-12-13 12:17:50,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:17:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:17:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:17:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=858, Unknown=36, NotChecked=60, Total=1056 [2022-12-13 12:17:50,278 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand has 32 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-12-13 12:18:11,064 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 12:18:13,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:18:15,104 WARN L539 Checker$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 12:18:17,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:18:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:18:25,339 INFO L93 Difference]: Finished difference Result 811 states and 1147 transitions. [2022-12-13 12:18:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 12:18:25,340 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 178 [2022-12-13 12:18:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:18:25,343 INFO L225 Difference]: With dead ends: 811 [2022-12-13 12:18:25,343 INFO L226 Difference]: Without dead ends: 706 [2022-12-13 12:18:25,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 207 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=591, Invalid=5399, Unknown=176, NotChecked=154, Total=6320 [2022-12-13 12:18:25,345 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1216 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 6621 mSolverCounterSat, 706 mSolverCounterUnsat, 552 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 8590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 6621 IncrementalHoareTripleChecker+Invalid, 552 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:18:25,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 2416 Invalid, 8590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 6621 Invalid, 552 Unknown, 711 Unchecked, 18.3s Time] [2022-12-13 12:18:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-12-13 12:18:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 583. [2022-12-13 12:18:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 408 states have (on average 1.2107843137254901) internal successors, (494), 421 states have internal predecessors, (494), 108 states have call successors, (108), 46 states have call predecessors, (108), 66 states have return successors, (200), 119 states have call predecessors, (200), 104 states have call successors, (200) [2022-12-13 12:18:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2022-12-13 12:18:25,384 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 178 [2022-12-13 12:18:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:18:25,384 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2022-12-13 12:18:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-12-13 12:18:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2022-12-13 12:18:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-13 12:18:25,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:18:25,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:25,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:18:25,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 12:18:25,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:18:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:18:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1420868335, now seen corresponding path program 1 times [2022-12-13 12:18:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:18:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220550139] [2022-12-13 12:18:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:25,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:18:25,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:18:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700088150] [2022-12-13 12:18:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:25,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:18:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:18:25,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:18:25,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:18:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 12:18:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:18:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 12:18:26,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:18:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:18:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220550139] [2022-12-13 12:18:26,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:18:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700088150] [2022-12-13 12:18:26,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700088150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:18:26,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:18:26,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 12:18:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73913901] [2022-12-13 12:18:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:18:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:18:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:18:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:18:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:18:26,068 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-13 12:18:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:18:26,170 INFO L93 Difference]: Finished difference Result 1014 states and 1392 transitions. [2022-12-13 12:18:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:18:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) Word has length 190 [2022-12-13 12:18:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:18:26,174 INFO L225 Difference]: With dead ends: 1014 [2022-12-13 12:18:26,174 INFO L226 Difference]: Without dead ends: 588 [2022-12-13 12:18:26,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:18:26,176 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 16 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:18:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2046 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:18:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-12-13 12:18:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 570. [2022-12-13 12:18:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 396 states have (on average 1.207070707070707) internal successors, (478), 408 states have internal predecessors, (478), 108 states have call successors, (108), 46 states have call predecessors, (108), 65 states have return successors, (192), 119 states have call predecessors, (192), 104 states have call successors, (192) [2022-12-13 12:18:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 778 transitions. [2022-12-13 12:18:26,211 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 778 transitions. Word has length 190 [2022-12-13 12:18:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:18:26,211 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 778 transitions. [2022-12-13 12:18:26,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-13 12:18:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 778 transitions. [2022-12-13 12:18:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-13 12:18:26,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:18:26,213 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:26,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:18:26,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 12:18:26,414 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:18:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:18:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1899288824, now seen corresponding path program 1 times [2022-12-13 12:18:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:18:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992171568] [2022-12-13 12:18:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:18:26,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:18:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368245650] [2022-12-13 12:18:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:18:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:18:26,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:18:26,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:18:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 159 conjunts are in the unsatisfiable core [2022-12-13 12:18:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:18:26,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:18:27,159 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 12:18:41,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:18:41,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-12-13 12:18:41,884 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-13 12:18:48,178 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 12:18:48,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 12:18:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 62 [2022-12-13 12:18:48,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:18:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:18:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:18:48,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2022-12-13 12:18:49,658 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1201 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1201) |c_#memory_int|)) is different from true [2022-12-13 12:18:49,921 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_1202 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_1202)) |c_#memory_int|)) is different from true [2022-12-13 12:18:50,169 WARN L859 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (select (select |c_#memory_int| |c_aws_array_list_is_valid_#in~list.base|) (+ |c_aws_array_list_is_valid_#in~list.offset| 8)) 18446744073709551616))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_1202 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_1202))))) is different from true [2022-12-13 12:18:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 39 proven. 19 refuted. 4 times theorem prover too weak. 34 trivial. 6 not checked. [2022-12-13 12:18:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:18:52,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:18:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992171568] [2022-12-13 12:18:52,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:18:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368245650] [2022-12-13 12:18:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368245650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:18:52,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:18:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-12-13 12:18:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156197389] [2022-12-13 12:18:52,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:18:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:18:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:18:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:18:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1787, Unknown=38, NotChecked=264, Total=2256 [2022-12-13 12:18:52,203 INFO L87 Difference]: Start difference. First operand 570 states and 778 transitions. Second operand has 44 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 15 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2022-12-13 12:18:54,814 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 12:18:57,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:01,815 WARN L539 Checker$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 12:19:10,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:22,425 WARN L539 Checker$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 12:19:28,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:38,741 WARN L539 Checker$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 12:19:40,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:42,820 WARN L539 Checker$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 12:19:44,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:46,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:48,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:50,980 WARN L539 Checker$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 12:19:57,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:19:59,203 WARN L539 Checker$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 12:20:01,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:03,365 WARN L539 Checker$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 12:20:05,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:07,500 WARN L539 Checker$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 12:20:09,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:11,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:16,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:18,271 WARN L539 Checker$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 12:20:20,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:22,494 WARN L539 Checker$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 12:20:24,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:26,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:20:29,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:31,938 WARN L539 Checker$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 12:20:34,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:36,550 WARN L539 Checker$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 12:20:38,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:47,101 WARN L539 Checker$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 12:20:49,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:53,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:01,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:05,840 WARN L539 Checker$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 12:21:13,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:15,850 WARN L539 Checker$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 12:21:17,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:19,952 WARN L539 Checker$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 12:21:22,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:23,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:25,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:46,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:48,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:50,089 WARN L539 Checker$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 12:21:52,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:54,140 WARN L539 Checker$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 12:21:56,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:21:58,196 WARN L539 Checker$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 12:22:00,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:02,255 WARN L539 Checker$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 12:22:14,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:16,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:30,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:35,226 WARN L539 Checker$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 12:22:37,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:41,601 WARN L539 Checker$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 12:22:43,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:46,182 WARN L539 Checker$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 12:22:48,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:22:50,326 WARN L539 Checker$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 12:23:01,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:23:03,504 WARN L539 Checker$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 12:23:06,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:23:09,065 WARN L539 Checker$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 12:23:29,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:23:31,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:23:33,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:23:35,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:23:44,530 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 74 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:23:57,012 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 69 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:24:05,393 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 59 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:24:07,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:09,672 WARN L539 Checker$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 12:24:11,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:13,706 WARN L539 Checker$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 12:24:15,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:17,810 WARN L539 Checker$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 12:24:19,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:21,918 WARN L539 Checker$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 12:24:24,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:30,850 WARN L539 Checker$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 12:24:32,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:34,959 WARN L539 Checker$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 12:24:48,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:50,639 WARN L539 Checker$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 12:24:52,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:54,759 WARN L539 Checker$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 12:24:56,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:24:59,114 WARN L539 Checker$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 12:25:01,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:25:03,798 WARN L539 Checker$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 12:25:05,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:25:07,911 WARN L539 Checker$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 12:25:09,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:26:03,778 WARN L539 Checker$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 12:26:06,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:26:08,633 WARN L539 Checker$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 12:26:10,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:26:13,556 WARN L539 Checker$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 12:26:15,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:26:17,731 WARN L539 Checker$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 12:26:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:19,140 INFO L93 Difference]: Finished difference Result 1789 states and 2586 transitions. [2022-12-13 12:26:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 12:26:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 15 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) Word has length 184 [2022-12-13 12:26:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:19,145 INFO L225 Difference]: With dead ends: 1789 [2022-12-13 12:26:19,145 INFO L226 Difference]: Without dead ends: 1393 [2022-12-13 12:26:19,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 195 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4622 ImplicationChecksByTransitivity, 250.2s TimeCoverageRelationStatistics Valid=1084, Invalid=12050, Unknown=218, NotChecked=690, Total=14042 [2022-12-13 12:26:19,149 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 814 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 8479 mSolverCounterSat, 496 mSolverCounterUnsat, 376 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 11088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 8479 IncrementalHoareTripleChecker+Invalid, 376 IncrementalHoareTripleChecker+Unknown, 1737 IncrementalHoareTripleChecker+Unchecked, 219.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:19,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 3387 Invalid, 11088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 8479 Invalid, 376 Unknown, 1737 Unchecked, 219.8s Time] [2022-12-13 12:26:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-12-13 12:26:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1319. [2022-12-13 12:26:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 917 states have (on average 1.2050163576881134) internal successors, (1105), 946 states have internal predecessors, (1105), 247 states have call successors, (247), 112 states have call predecessors, (247), 154 states have return successors, (568), 270 states have call predecessors, (568), 237 states have call successors, (568) [2022-12-13 12:26:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1920 transitions. [2022-12-13 12:26:19,243 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1920 transitions. Word has length 184 [2022-12-13 12:26:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:19,243 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1920 transitions. [2022-12-13 12:26:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 15 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2022-12-13 12:26:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1920 transitions. [2022-12-13 12:26:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-13 12:26:19,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:19,247 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:19,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:26:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:26:19,448 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1072499526, now seen corresponding path program 1 times [2022-12-13 12:26:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974446128] [2022-12-13 12:26:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:19,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:19,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627132076] [2022-12-13 12:26:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:19,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:19,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:19,497 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:19,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:26:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:26:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 12:26:19,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:19,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974446128] [2022-12-13 12:26:19,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:19,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627132076] [2022-12-13 12:26:19,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627132076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:19,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:19,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:26:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708078690] [2022-12-13 12:26:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:20,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:26:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:26:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:26:20,001 INFO L87 Difference]: Start difference. First operand 1319 states and 1920 transitions. Second operand has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-13 12:26:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:20,131 INFO L93 Difference]: Finished difference Result 2207 states and 3327 transitions. [2022-12-13 12:26:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:26:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 184 [2022-12-13 12:26:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:20,140 INFO L225 Difference]: With dead ends: 2207 [2022-12-13 12:26:20,140 INFO L226 Difference]: Without dead ends: 1319 [2022-12-13 12:26:20,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:26:20,147 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:20,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 944 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-12-13 12:26:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2022-12-13 12:26:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 917 states have (on average 1.1941112322791712) internal successors, (1095), 946 states have internal predecessors, (1095), 247 states have call successors, (247), 112 states have call predecessors, (247), 154 states have return successors, (568), 270 states have call predecessors, (568), 237 states have call successors, (568) [2022-12-13 12:26:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1910 transitions. [2022-12-13 12:26:20,256 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1910 transitions. Word has length 184 [2022-12-13 12:26:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:20,256 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1910 transitions. [2022-12-13 12:26:20,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-13 12:26:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1910 transitions. [2022-12-13 12:26:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-13 12:26:20,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:20,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:20,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:26:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:26:20,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1704990226, now seen corresponding path program 1 times [2022-12-13 12:26:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:20,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033600900] [2022-12-13 12:26:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:20,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:20,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151139738] [2022-12-13 12:26:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:20,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:20,536 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:20,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:26:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:26:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 12:26:20,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033600900] [2022-12-13 12:26:20,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151139738] [2022-12-13 12:26:20,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151139738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:20,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:26:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233545938] [2022-12-13 12:26:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:26:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:26:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:26:20,960 INFO L87 Difference]: Start difference. First operand 1319 states and 1910 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:21,111 INFO L93 Difference]: Finished difference Result 2356 states and 3696 transitions. [2022-12-13 12:26:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:26:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 185 [2022-12-13 12:26:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:21,123 INFO L225 Difference]: With dead ends: 2356 [2022-12-13 12:26:21,123 INFO L226 Difference]: Without dead ends: 1369 [2022-12-13 12:26:21,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:26:21,132 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:21,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-12-13 12:26:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1329. [2022-12-13 12:26:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 927 states have (on average 1.1920172599784251) internal successors, (1105), 956 states have internal predecessors, (1105), 247 states have call successors, (247), 112 states have call predecessors, (247), 154 states have return successors, (568), 270 states have call predecessors, (568), 237 states have call successors, (568) [2022-12-13 12:26:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1920 transitions. [2022-12-13 12:26:21,268 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1920 transitions. Word has length 185 [2022-12-13 12:26:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:21,269 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1920 transitions. [2022-12-13 12:26:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1920 transitions. [2022-12-13 12:26:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-13 12:26:21,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:21,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:21,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:26:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:21,478 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash -356266135, now seen corresponding path program 1 times [2022-12-13 12:26:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:21,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120105108] [2022-12-13 12:26:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:21,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:21,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378503985] [2022-12-13 12:26:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:21,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:21,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:21,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:26:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:26:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 12:26:22,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:22,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120105108] [2022-12-13 12:26:22,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378503985] [2022-12-13 12:26:22,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378503985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:22,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:22,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 12:26:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394643047] [2022-12-13 12:26:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:22,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:26:22,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:26:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:26:22,053 INFO L87 Difference]: Start difference. First operand 1329 states and 1920 transitions. Second operand has 9 states, 8 states have (on average 12.125) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-13 12:26:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:22,254 INFO L93 Difference]: Finished difference Result 1938 states and 2768 transitions. [2022-12-13 12:26:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:26:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.125) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 185 [2022-12-13 12:26:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:22,258 INFO L225 Difference]: With dead ends: 1938 [2022-12-13 12:26:22,258 INFO L226 Difference]: Without dead ends: 1040 [2022-12-13 12:26:22,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:26:22,261 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 26 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:22,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1428 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-12-13 12:26:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 963. [2022-12-13 12:26:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 688 states have (on average 1.188953488372093) internal successors, (818), 707 states have internal predecessors, (818), 175 states have call successors, (175), 95 states have call predecessors, (175), 99 states have return successors, (307), 163 states have call predecessors, (307), 172 states have call successors, (307) [2022-12-13 12:26:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1300 transitions. [2022-12-13 12:26:22,327 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1300 transitions. Word has length 185 [2022-12-13 12:26:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:22,327 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1300 transitions. [2022-12-13 12:26:22,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.125) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-13 12:26:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1300 transitions. [2022-12-13 12:26:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-13 12:26:22,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:22,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:22,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:26:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:22,531 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash 858962119, now seen corresponding path program 1 times [2022-12-13 12:26:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:22,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348311807] [2022-12-13 12:26:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:22,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:22,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990060934] [2022-12-13 12:26:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:22,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:22,579 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:22,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:26:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:26:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:26:22,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:22,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348311807] [2022-12-13 12:26:22,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990060934] [2022-12-13 12:26:22,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990060934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:22,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:22,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:26:22,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885459221] [2022-12-13 12:26:22,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:22,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:26:22,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:22,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:26:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:26:22,946 INFO L87 Difference]: Start difference. First operand 963 states and 1300 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:23,042 INFO L93 Difference]: Finished difference Result 1505 states and 2095 transitions. [2022-12-13 12:26:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:26:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 187 [2022-12-13 12:26:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:23,046 INFO L225 Difference]: With dead ends: 1505 [2022-12-13 12:26:23,046 INFO L226 Difference]: Without dead ends: 1037 [2022-12-13 12:26:23,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:26:23,047 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 4 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:23,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 777 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-12-13 12:26:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 991. [2022-12-13 12:26:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 709 states have (on average 1.1833568406205923) internal successors, (839), 728 states have internal predecessors, (839), 175 states have call successors, (175), 95 states have call predecessors, (175), 106 states have return successors, (333), 170 states have call predecessors, (333), 172 states have call successors, (333) [2022-12-13 12:26:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1347 transitions. [2022-12-13 12:26:23,126 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1347 transitions. Word has length 187 [2022-12-13 12:26:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:23,126 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1347 transitions. [2022-12-13 12:26:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1347 transitions. [2022-12-13 12:26:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-13 12:26:23,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:23,129 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:23,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 12:26:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:26:23,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1435779747, now seen corresponding path program 1 times [2022-12-13 12:26:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624221540] [2022-12-13 12:26:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:23,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:23,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018797515] [2022-12-13 12:26:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:23,370 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:23,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:26:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:26:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-13 12:26:23,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624221540] [2022-12-13 12:26:23,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018797515] [2022-12-13 12:26:23,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018797515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:23,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:26:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867959752] [2022-12-13 12:26:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:26:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:26:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:26:23,722 INFO L87 Difference]: Start difference. First operand 991 states and 1347 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:23,810 INFO L93 Difference]: Finished difference Result 1056 states and 1429 transitions. [2022-12-13 12:26:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:26:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 190 [2022-12-13 12:26:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:23,814 INFO L225 Difference]: With dead ends: 1056 [2022-12-13 12:26:23,814 INFO L226 Difference]: Without dead ends: 994 [2022-12-13 12:26:23,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:26:23,815 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:23,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 582 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-12-13 12:26:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2022-12-13 12:26:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 712 states have (on average 1.1825842696629214) internal successors, (842), 728 states have internal predecessors, (842), 175 states have call successors, (175), 95 states have call predecessors, (175), 106 states have return successors, (333), 173 states have call predecessors, (333), 172 states have call successors, (333) [2022-12-13 12:26:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1350 transitions. [2022-12-13 12:26:23,926 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1350 transitions. Word has length 190 [2022-12-13 12:26:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:23,926 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1350 transitions. [2022-12-13 12:26:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 12:26:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1350 transitions. [2022-12-13 12:26:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-13 12:26:23,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:23,929 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:26:24,130 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2036179758, now seen corresponding path program 1 times [2022-12-13 12:26:24,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:24,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621641410] [2022-12-13 12:26:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:24,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:24,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:24,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220737830] [2022-12-13 12:26:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:24,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:24,202 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:24,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:26:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:26:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-13 12:26:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-13 12:26:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621641410] [2022-12-13 12:26:24,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220737830] [2022-12-13 12:26:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220737830] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:26:24,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:26:24,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-13 12:26:24,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090904364] [2022-12-13 12:26:24,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:24,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:26:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:24,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:26:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:26:24,865 INFO L87 Difference]: Start difference. First operand 994 states and 1350 transitions. Second operand has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-13 12:26:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:24,961 INFO L93 Difference]: Finished difference Result 1014 states and 1372 transitions. [2022-12-13 12:26:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:26:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 213 [2022-12-13 12:26:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:24,965 INFO L225 Difference]: With dead ends: 1014 [2022-12-13 12:26:24,965 INFO L226 Difference]: Without dead ends: 1012 [2022-12-13 12:26:24,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:26:24,965 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 6 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:24,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 965 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-12-13 12:26:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1009. [2022-12-13 12:26:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 721 states have (on average 1.1803051317614424) internal successors, (851), 737 states have internal predecessors, (851), 178 states have call successors, (178), 98 states have call predecessors, (178), 109 states have return successors, (336), 176 states have call predecessors, (336), 175 states have call successors, (336) [2022-12-13 12:26:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1365 transitions. [2022-12-13 12:26:25,063 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1365 transitions. Word has length 213 [2022-12-13 12:26:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1365 transitions. [2022-12-13 12:26:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-13 12:26:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1365 transitions. [2022-12-13 12:26:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-13 12:26:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:25,066 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:25,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:25,268 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1729579167, now seen corresponding path program 1 times [2022-12-13 12:26:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:25,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049015902] [2022-12-13 12:26:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:25,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453373084] [2022-12-13 12:26:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:25,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:25,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:25,365 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:25,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:26:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:25,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 12:26:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 12:26:25,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-13 12:26:26,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049015902] [2022-12-13 12:26:26,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453373084] [2022-12-13 12:26:26,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453373084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:26,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:26,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 12:26:26,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363514804] [2022-12-13 12:26:26,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:26,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:26:26,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:26,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:26:26,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:26:26,182 INFO L87 Difference]: Start difference. First operand 1009 states and 1365 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-12-13 12:26:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:26,407 INFO L93 Difference]: Finished difference Result 1816 states and 2559 transitions. [2022-12-13 12:26:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:26:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 196 [2022-12-13 12:26:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:26,411 INFO L225 Difference]: With dead ends: 1816 [2022-12-13 12:26:26,411 INFO L226 Difference]: Without dead ends: 1114 [2022-12-13 12:26:26,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:26:26,413 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 29 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:26,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 944 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-12-13 12:26:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1072. [2022-12-13 12:26:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 784 states have (on average 1.1926020408163265) internal successors, (935), 800 states have internal predecessors, (935), 178 states have call successors, (178), 98 states have call predecessors, (178), 109 states have return successors, (336), 176 states have call predecessors, (336), 175 states have call successors, (336) [2022-12-13 12:26:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1449 transitions. [2022-12-13 12:26:26,490 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1449 transitions. Word has length 196 [2022-12-13 12:26:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:26,490 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1449 transitions. [2022-12-13 12:26:26,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-12-13 12:26:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1449 transitions. [2022-12-13 12:26:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-13 12:26:26,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:26,493 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:26,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 12:26:26,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:26,694 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1676353546, now seen corresponding path program 1 times [2022-12-13 12:26:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:26,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963023908] [2022-12-13 12:26:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:26,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195251890] [2022-12-13 12:26:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:26,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:26,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:26,747 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:26,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:26:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2803 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:26:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-12-13 12:26:27,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963023908] [2022-12-13 12:26:27,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195251890] [2022-12-13 12:26:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195251890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:27,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 12:26:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881240375] [2022-12-13 12:26:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:26:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:26:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:26:27,290 INFO L87 Difference]: Start difference. First operand 1072 states and 1449 transitions. Second operand has 9 states, 8 states have (on average 13.75) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 6 states have call successors, (27) [2022-12-13 12:26:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:27,616 INFO L93 Difference]: Finished difference Result 1598 states and 2169 transitions. [2022-12-13 12:26:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:26:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.75) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 6 states have call successors, (27) Word has length 217 [2022-12-13 12:26:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:27,621 INFO L225 Difference]: With dead ends: 1598 [2022-12-13 12:26:27,621 INFO L226 Difference]: Without dead ends: 1051 [2022-12-13 12:26:27,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:26:27,622 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:27,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1043 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:26:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-12-13 12:26:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1019. [2022-12-13 12:26:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 744 states have (on average 1.1935483870967742) internal successors, (888), 767 states have internal predecessors, (888), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (293), 163 states have call predecessors, (293), 169 states have call successors, (293) [2022-12-13 12:26:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1353 transitions. [2022-12-13 12:26:27,686 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1353 transitions. Word has length 217 [2022-12-13 12:26:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:27,686 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1353 transitions. [2022-12-13 12:26:27,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.75) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 6 states have call successors, (27) [2022-12-13 12:26:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1353 transitions. [2022-12-13 12:26:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-12-13 12:26:27,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:27,689 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:27,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 12:26:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:27,890 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash -938828775, now seen corresponding path program 1 times [2022-12-13 12:26:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342714373] [2022-12-13 12:26:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:27,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705291006] [2022-12-13 12:26:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:27,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:27,961 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:27,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:26:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2937 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:26:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 12:26:28,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-12-13 12:26:28,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:28,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342714373] [2022-12-13 12:26:28,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:28,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705291006] [2022-12-13 12:26:28,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705291006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:28,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:28,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-13 12:26:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912621418] [2022-12-13 12:26:28,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:26:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:26:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:26:28,762 INFO L87 Difference]: Start difference. First operand 1019 states and 1353 transitions. Second operand has 13 states, 11 states have (on average 10.363636363636363) internal successors, (114), 13 states have internal predecessors, (114), 6 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-12-13 12:26:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:28,938 INFO L93 Difference]: Finished difference Result 1483 states and 1989 transitions. [2022-12-13 12:26:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:26:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.363636363636363) internal successors, (114), 13 states have internal predecessors, (114), 6 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 237 [2022-12-13 12:26:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:28,942 INFO L225 Difference]: With dead ends: 1483 [2022-12-13 12:26:28,942 INFO L226 Difference]: Without dead ends: 1028 [2022-12-13 12:26:28,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 460 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:26:28,944 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 21 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:28,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1315 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-12-13 12:26:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1025. [2022-12-13 12:26:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 750 states have (on average 1.192) internal successors, (894), 773 states have internal predecessors, (894), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (293), 163 states have call predecessors, (293), 169 states have call successors, (293) [2022-12-13 12:26:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1359 transitions. [2022-12-13 12:26:29,021 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1359 transitions. Word has length 237 [2022-12-13 12:26:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1359 transitions. [2022-12-13 12:26:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.363636363636363) internal successors, (114), 13 states have internal predecessors, (114), 6 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-12-13 12:26:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1359 transitions. [2022-12-13 12:26:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-12-13 12:26:29,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:29,024 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 8, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:29,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:29,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:29,225 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash -320835067, now seen corresponding path program 1 times [2022-12-13 12:26:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:29,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613308543] [2022-12-13 12:26:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:29,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:29,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:29,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680804008] [2022-12-13 12:26:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:29,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:29,266 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:29,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:26:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:26:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 118 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 12:26:29,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-12-13 12:26:30,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613308543] [2022-12-13 12:26:30,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680804008] [2022-12-13 12:26:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680804008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:30,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:30,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2022-12-13 12:26:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520051863] [2022-12-13 12:26:30,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:26:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:26:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:26:30,173 INFO L87 Difference]: Start difference. First operand 1025 states and 1359 transitions. Second operand has 20 states, 17 states have (on average 8.0) internal successors, (136), 20 states have internal predecessors, (136), 7 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2022-12-13 12:26:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:30,778 INFO L93 Difference]: Finished difference Result 1537 states and 2100 transitions. [2022-12-13 12:26:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:26:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 8.0) internal successors, (136), 20 states have internal predecessors, (136), 7 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) Word has length 230 [2022-12-13 12:26:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:30,782 INFO L225 Difference]: With dead ends: 1537 [2022-12-13 12:26:30,782 INFO L226 Difference]: Without dead ends: 1076 [2022-12-13 12:26:30,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 439 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:26:30,784 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 43 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:30,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2708 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:26:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-12-13 12:26:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1031. [2022-12-13 12:26:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 756 states have (on average 1.1904761904761905) internal successors, (900), 779 states have internal predecessors, (900), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (293), 163 states have call predecessors, (293), 169 states have call successors, (293) [2022-12-13 12:26:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1365 transitions. [2022-12-13 12:26:30,899 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1365 transitions. Word has length 230 [2022-12-13 12:26:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:30,899 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1365 transitions. [2022-12-13 12:26:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 8.0) internal successors, (136), 20 states have internal predecessors, (136), 7 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2022-12-13 12:26:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1365 transitions. [2022-12-13 12:26:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-13 12:26:30,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:30,902 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:30,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:31,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:31,103 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2037305218, now seen corresponding path program 1 times [2022-12-13 12:26:31,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:31,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025677007] [2022-12-13 12:26:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:31,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701837272] [2022-12-13 12:26:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:31,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:31,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:26:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 3017 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:26:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 44 proven. 9 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-12-13 12:26:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-12-13 12:26:32,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025677007] [2022-12-13 12:26:32,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701837272] [2022-12-13 12:26:32,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701837272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:32,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:32,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-13 12:26:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321626776] [2022-12-13 12:26:32,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 12:26:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 12:26:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:26:32,082 INFO L87 Difference]: Start difference. First operand 1031 states and 1365 transitions. Second operand has 17 states, 15 states have (on average 8.733333333333333) internal successors, (131), 17 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-12-13 12:26:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:32,323 INFO L93 Difference]: Finished difference Result 1507 states and 2013 transitions. [2022-12-13 12:26:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:26:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 8.733333333333333) internal successors, (131), 17 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 247 [2022-12-13 12:26:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:32,327 INFO L225 Difference]: With dead ends: 1507 [2022-12-13 12:26:32,327 INFO L226 Difference]: Without dead ends: 1040 [2022-12-13 12:26:32,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:26:32,328 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 20 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:32,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2063 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-12-13 12:26:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1037. [2022-12-13 12:26:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 762 states have (on average 1.188976377952756) internal successors, (906), 785 states have internal predecessors, (906), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (293), 163 states have call predecessors, (293), 169 states have call successors, (293) [2022-12-13 12:26:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1371 transitions. [2022-12-13 12:26:32,453 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1371 transitions. Word has length 247 [2022-12-13 12:26:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1371 transitions. [2022-12-13 12:26:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 8.733333333333333) internal successors, (131), 17 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-12-13 12:26:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1371 transitions. [2022-12-13 12:26:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-12-13 12:26:32,460 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:32,460 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 8, 6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:32,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 12:26:32,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 12:26:32,661 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 644239130, now seen corresponding path program 1 times [2022-12-13 12:26:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:32,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763534342] [2022-12-13 12:26:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:32,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:32,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105206033] [2022-12-13 12:26:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:32,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:32,727 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 12:26:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 12:26:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-12-13 12:26:33,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-12-13 12:26:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763534342] [2022-12-13 12:26:33,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105206033] [2022-12-13 12:26:33,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105206033] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:26:33,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:26:33,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-12-13 12:26:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301227477] [2022-12-13 12:26:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:26:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:26:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:26:33,455 INFO L87 Difference]: Start difference. First operand 1037 states and 1371 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-13 12:26:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:33,566 INFO L93 Difference]: Finished difference Result 1054 states and 1387 transitions. [2022-12-13 12:26:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:26:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 228 [2022-12-13 12:26:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:33,570 INFO L225 Difference]: With dead ends: 1054 [2022-12-13 12:26:33,570 INFO L226 Difference]: Without dead ends: 1037 [2022-12-13 12:26:33,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:26:33,570 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 4 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:33,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 970 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:26:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-12-13 12:26:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-12-13 12:26:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 762 states have (on average 1.188976377952756) internal successors, (906), 785 states have internal predecessors, (906), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1368 transitions. [2022-12-13 12:26:33,635 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1368 transitions. Word has length 228 [2022-12-13 12:26:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:33,635 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1368 transitions. [2022-12-13 12:26:33,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-13 12:26:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1368 transitions. [2022-12-13 12:26:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-12-13 12:26:33,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:33,638 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:33,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 12:26:33,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:33,838 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1426864500, now seen corresponding path program 2 times [2022-12-13 12:26:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:33,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587339551] [2022-12-13 12:26:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:33,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:33,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708153182] [2022-12-13 12:26:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:26:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:33,896 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:33,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 12:26:34,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:26:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:34,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 12:26:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 71 proven. 38 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-13 12:26:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-13 12:26:35,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:35,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587339551] [2022-12-13 12:26:35,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:35,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708153182] [2022-12-13 12:26:35,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708153182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:35,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:35,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2022-12-13 12:26:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049148731] [2022-12-13 12:26:35,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:35,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:26:35,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:26:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:26:35,491 INFO L87 Difference]: Start difference. First operand 1037 states and 1368 transitions. Second operand has 19 states, 18 states have (on average 7.888888888888889) internal successors, (142), 19 states have internal predecessors, (142), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-13 12:26:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:36,679 INFO L93 Difference]: Finished difference Result 2027 states and 2855 transitions. [2022-12-13 12:26:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:26:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 7.888888888888889) internal successors, (142), 19 states have internal predecessors, (142), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 238 [2022-12-13 12:26:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:36,683 INFO L225 Difference]: With dead ends: 2027 [2022-12-13 12:26:36,683 INFO L226 Difference]: Without dead ends: 1292 [2022-12-13 12:26:36,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:26:36,685 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 93 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:36,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2157 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:26:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-12-13 12:26:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1163. [2022-12-13 12:26:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 888 states have (on average 1.2094594594594594) internal successors, (1074), 911 states have internal predecessors, (1074), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1536 transitions. [2022-12-13 12:26:36,781 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1536 transitions. Word has length 238 [2022-12-13 12:26:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:36,782 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1536 transitions. [2022-12-13 12:26:36,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 7.888888888888889) internal successors, (142), 19 states have internal predecessors, (142), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-13 12:26:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1536 transitions. [2022-12-13 12:26:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-12-13 12:26:36,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:36,787 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:36,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 12:26:36,988 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash -702449986, now seen corresponding path program 1 times [2022-12-13 12:26:36,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294471973] [2022-12-13 12:26:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:37,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398482766] [2022-12-13 12:26:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:37,073 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:37,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 12:26:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 3315 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:26:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-12-13 12:26:37,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2022-12-13 12:26:38,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294471973] [2022-12-13 12:26:38,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398482766] [2022-12-13 12:26:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398482766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:38,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:38,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-12-13 12:26:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461799761] [2022-12-13 12:26:38,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:26:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:26:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:26:38,058 INFO L87 Difference]: Start difference. First operand 1163 states and 1536 transitions. Second operand has 19 states, 17 states have (on average 9.764705882352942) internal successors, (166), 19 states have internal predecessors, (166), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:38,300 INFO L93 Difference]: Finished difference Result 1699 states and 2259 transitions. [2022-12-13 12:26:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:26:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 9.764705882352942) internal successors, (166), 19 states have internal predecessors, (166), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 327 [2022-12-13 12:26:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:38,304 INFO L225 Difference]: With dead ends: 1699 [2022-12-13 12:26:38,304 INFO L226 Difference]: Without dead ends: 1172 [2022-12-13 12:26:38,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 634 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-12-13 12:26:38,305 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 22 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1878 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:38,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1878 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-12-13 12:26:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1169. [2022-12-13 12:26:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 894 states have (on average 1.2080536912751678) internal successors, (1080), 917 states have internal predecessors, (1080), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1542 transitions. [2022-12-13 12:26:38,378 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1542 transitions. Word has length 327 [2022-12-13 12:26:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:38,378 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1542 transitions. [2022-12-13 12:26:38,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 9.764705882352942) internal successors, (166), 19 states have internal predecessors, (166), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1542 transitions. [2022-12-13 12:26:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-12-13 12:26:38,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:38,381 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:38,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 12:26:38,583 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1081038784, now seen corresponding path program 1 times [2022-12-13 12:26:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110134061] [2022-12-13 12:26:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:38,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:38,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294448650] [2022-12-13 12:26:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:38,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:38,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:38,645 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:38,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 12:26:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 3356 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:26:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 182 proven. 25 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2022-12-13 12:26:39,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2022-12-13 12:26:39,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:39,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110134061] [2022-12-13 12:26:39,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:39,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294448650] [2022-12-13 12:26:39,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294448650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:39,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:39,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-13 12:26:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439671057] [2022-12-13 12:26:39,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:39,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:26:39,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:26:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:26:39,974 INFO L87 Difference]: Start difference. First operand 1169 states and 1542 transitions. Second operand has 21 states, 19 states have (on average 8.894736842105264) internal successors, (169), 21 states have internal predecessors, (169), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:40,267 INFO L93 Difference]: Finished difference Result 1711 states and 2271 transitions. [2022-12-13 12:26:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:26:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 8.894736842105264) internal successors, (169), 21 states have internal predecessors, (169), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 331 [2022-12-13 12:26:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:40,271 INFO L225 Difference]: With dead ends: 1711 [2022-12-13 12:26:40,271 INFO L226 Difference]: Without dead ends: 1178 [2022-12-13 12:26:40,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 640 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:26:40,273 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 21 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:40,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2065 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:26:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-12-13 12:26:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1175. [2022-12-13 12:26:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 900 states have (on average 1.2066666666666668) internal successors, (1086), 923 states have internal predecessors, (1086), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1548 transitions. [2022-12-13 12:26:40,345 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1548 transitions. Word has length 331 [2022-12-13 12:26:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:40,345 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1548 transitions. [2022-12-13 12:26:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 8.894736842105264) internal successors, (169), 21 states have internal predecessors, (169), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1548 transitions. [2022-12-13 12:26:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-12-13 12:26:40,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:40,348 INFO L195 NwaCegarLoop]: trace histogram [23, 20, 20, 12, 12, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:40,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:40,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 12:26:40,550 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash -625693830, now seen corresponding path program 1 times [2022-12-13 12:26:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584744345] [2022-12-13 12:26:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:40,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32275591] [2022-12-13 12:26:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:40,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:40,640 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:40,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 12:26:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 3423 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:26:41,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 259 proven. 36 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2022-12-13 12:26:41,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2022-12-13 12:26:41,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584744345] [2022-12-13 12:26:41,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32275591] [2022-12-13 12:26:41,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32275591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:41,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:41,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-12-13 12:26:41,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126578532] [2022-12-13 12:26:41,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:26:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:26:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:26:41,839 INFO L87 Difference]: Start difference. First operand 1175 states and 1548 transitions. Second operand has 23 states, 21 states have (on average 8.095238095238095) internal successors, (170), 23 states have internal predecessors, (170), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2022-12-13 12:26:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:42,150 INFO L93 Difference]: Finished difference Result 1723 states and 2283 transitions. [2022-12-13 12:26:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:26:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 8.095238095238095) internal successors, (170), 23 states have internal predecessors, (170), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) Word has length 346 [2022-12-13 12:26:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:42,155 INFO L225 Difference]: With dead ends: 1723 [2022-12-13 12:26:42,155 INFO L226 Difference]: Without dead ends: 1184 [2022-12-13 12:26:42,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 668 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:26:42,156 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 18 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:42,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2256 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:26:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-12-13 12:26:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1181. [2022-12-13 12:26:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 906 states have (on average 1.205298013245033) internal successors, (1092), 929 states have internal predecessors, (1092), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1554 transitions. [2022-12-13 12:26:42,239 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1554 transitions. Word has length 346 [2022-12-13 12:26:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:42,239 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1554 transitions. [2022-12-13 12:26:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 8.095238095238095) internal successors, (170), 23 states have internal predecessors, (170), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2022-12-13 12:26:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1554 transitions. [2022-12-13 12:26:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-12-13 12:26:42,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:42,242 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 30, 14, 14, 8, 8, 8, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:42,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 12:26:42,443 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2081315534, now seen corresponding path program 1 times [2022-12-13 12:26:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:42,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216836843] [2022-12-13 12:26:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:42,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927743949] [2022-12-13 12:26:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:42,534 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:42,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 12:26:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 3345 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 12:26:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 931 proven. 185 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2022-12-13 12:26:43,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 1758 trivial. 0 not checked. [2022-12-13 12:26:44,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:44,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216836843] [2022-12-13 12:26:44,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:44,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927743949] [2022-12-13 12:26:44,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927743949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:44,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:44,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 34 [2022-12-13 12:26:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246933504] [2022-12-13 12:26:44,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:44,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 12:26:44,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 12:26:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 12:26:44,288 INFO L87 Difference]: Start difference. First operand 1181 states and 1554 transitions. Second operand has 34 states, 32 states have (on average 6.15625) internal successors, (197), 34 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 6 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:45,870 INFO L93 Difference]: Finished difference Result 1847 states and 2535 transitions. [2022-12-13 12:26:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:26:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 6.15625) internal successors, (197), 34 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 6 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 347 [2022-12-13 12:26:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:45,874 INFO L225 Difference]: With dead ends: 1847 [2022-12-13 12:26:45,874 INFO L226 Difference]: Without dead ends: 1302 [2022-12-13 12:26:45,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 659 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 12:26:45,876 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 47 mSDsluCounter, 4321 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4525 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:45,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4525 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 12:26:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-12-13 12:26:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1187. [2022-12-13 12:26:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 912 states have (on average 1.2039473684210527) internal successors, (1098), 935 states have internal predecessors, (1098), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1560 transitions. [2022-12-13 12:26:45,951 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1560 transitions. Word has length 347 [2022-12-13 12:26:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:45,951 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1560 transitions. [2022-12-13 12:26:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 6.15625) internal successors, (197), 34 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 6 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1560 transitions. [2022-12-13 12:26:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-12-13 12:26:45,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:45,954 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 30, 16, 16, 8, 8, 8, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:45,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 12:26:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:46,155 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2140407882, now seen corresponding path program 2 times [2022-12-13 12:26:46,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:46,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375968438] [2022-12-13 12:26:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:46,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861734534] [2022-12-13 12:26:46,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:26:46,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:46,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:46,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 12:26:47,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:26:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 3383 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 12:26:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 956 proven. 204 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2022-12-13 12:26:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2022-12-13 12:26:48,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375968438] [2022-12-13 12:26:48,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861734534] [2022-12-13 12:26:48,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861734534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:48,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:48,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 35 [2022-12-13 12:26:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120476095] [2022-12-13 12:26:48,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:48,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:26:48,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:26:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:26:48,197 INFO L87 Difference]: Start difference. First operand 1187 states and 1560 transitions. Second operand has 35 states, 33 states have (on average 5.96969696969697) internal successors, (197), 35 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-12-13 12:26:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:48,943 INFO L93 Difference]: Finished difference Result 1859 states and 2547 transitions. [2022-12-13 12:26:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:26:48,944 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 5.96969696969697) internal successors, (197), 35 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 351 [2022-12-13 12:26:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:48,948 INFO L225 Difference]: With dead ends: 1859 [2022-12-13 12:26:48,948 INFO L226 Difference]: Without dead ends: 1308 [2022-12-13 12:26:48,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 12:26:48,950 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 42 mSDsluCounter, 5366 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 5604 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:48,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 5604 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:26:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-12-13 12:26:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1193. [2022-12-13 12:26:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 918 states have (on average 1.2026143790849673) internal successors, (1104), 941 states have internal predecessors, (1104), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1566 transitions. [2022-12-13 12:26:49,064 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1566 transitions. Word has length 351 [2022-12-13 12:26:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:49,064 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1566 transitions. [2022-12-13 12:26:49,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 5.96969696969697) internal successors, (197), 35 states have internal predecessors, (197), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-12-13 12:26:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1566 transitions. [2022-12-13 12:26:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-12-13 12:26:49,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:49,068 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 18, 18, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:49,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 12:26:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 12:26:49,269 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1042818608, now seen corresponding path program 2 times [2022-12-13 12:26:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616708989] [2022-12-13 12:26:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:49,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080415507] [2022-12-13 12:26:49,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:26:49,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:49,371 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:49,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 12:26:50,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:26:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:50,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 3508 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 12:26:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 302 proven. 81 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2022-12-13 12:26:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2022-12-13 12:26:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616708989] [2022-12-13 12:26:51,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080415507] [2022-12-13 12:26:51,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080415507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:51,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:51,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2022-12-13 12:26:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265490817] [2022-12-13 12:26:51,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:51,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:26:51,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:26:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:26:51,151 INFO L87 Difference]: Start difference. First operand 1193 states and 1566 transitions. Second operand has 29 states, 27 states have (on average 6.851851851851852) internal successors, (185), 29 states have internal predecessors, (185), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:51,631 INFO L93 Difference]: Finished difference Result 1759 states and 2319 transitions. [2022-12-13 12:26:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:26:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 6.851851851851852) internal successors, (185), 29 states have internal predecessors, (185), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 347 [2022-12-13 12:26:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:51,635 INFO L225 Difference]: With dead ends: 1759 [2022-12-13 12:26:51,635 INFO L226 Difference]: Without dead ends: 1202 [2022-12-13 12:26:51,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 664 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:26:51,637 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 21 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:51,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2823 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:26:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-12-13 12:26:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1199. [2022-12-13 12:26:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 924 states have (on average 1.2012987012987013) internal successors, (1110), 947 states have internal predecessors, (1110), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (290), 163 states have call predecessors, (290), 169 states have call successors, (290) [2022-12-13 12:26:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1572 transitions. [2022-12-13 12:26:51,710 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1572 transitions. Word has length 347 [2022-12-13 12:26:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:51,710 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1572 transitions. [2022-12-13 12:26:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 6.851851851851852) internal successors, (185), 29 states have internal predecessors, (185), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2022-12-13 12:26:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1572 transitions. [2022-12-13 12:26:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-12-13 12:26:51,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:51,713 INFO L195 NwaCegarLoop]: trace histogram [23, 20, 20, 20, 20, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:51,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 12:26:51,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:51,914 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1790423585, now seen corresponding path program 1 times [2022-12-13 12:26:51,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:51,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917416433] [2022-12-13 12:26:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:51,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:52,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:52,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275900115] [2022-12-13 12:26:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:52,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:52,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:52,003 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:52,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 12:26:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 3574 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:26:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2022-12-13 12:26:52,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:26:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917416433] [2022-12-13 12:26:52,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275900115] [2022-12-13 12:26:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275900115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:52,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 12:26:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892692374] [2022-12-13 12:26:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:26:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:26:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:26:52,683 INFO L87 Difference]: Start difference. First operand 1199 states and 1572 transitions. Second operand has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 8 states have internal predecessors, (125), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-13 12:26:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:52,871 INFO L93 Difference]: Finished difference Result 2046 states and 2671 transitions. [2022-12-13 12:26:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:26:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 8 states have internal predecessors, (125), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 356 [2022-12-13 12:26:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:52,875 INFO L225 Difference]: With dead ends: 2046 [2022-12-13 12:26:52,875 INFO L226 Difference]: Without dead ends: 1199 [2022-12-13 12:26:52,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:26:52,877 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 5 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:52,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1623 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:26:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-12-13 12:26:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2022-12-13 12:26:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 924 states have (on average 1.2012987012987013) internal successors, (1110), 947 states have internal predecessors, (1110), 172 states have call successors, (172), 91 states have call predecessors, (172), 102 states have return successors, (280), 163 states have call predecessors, (280), 169 states have call successors, (280) [2022-12-13 12:26:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1562 transitions. [2022-12-13 12:26:52,960 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1562 transitions. Word has length 356 [2022-12-13 12:26:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:52,960 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1562 transitions. [2022-12-13 12:26:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 8 states have internal predecessors, (125), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-13 12:26:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1562 transitions. [2022-12-13 12:26:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-12-13 12:26:52,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:52,964 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 30, 20, 20, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:52,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 12:26:53,165 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash 42129313, now seen corresponding path program 2 times [2022-12-13 12:26:53,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:53,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753879286] [2022-12-13 12:26:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:53,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:53,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563710699] [2022-12-13 12:26:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:26:53,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:53,265 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:53,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 12:26:54,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:26:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 3642 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 12:26:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 809 proven. 13 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2022-12-13 12:26:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 2143 trivial. 0 not checked. [2022-12-13 12:26:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753879286] [2022-12-13 12:26:55,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563710699] [2022-12-13 12:26:55,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563710699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:55,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:55,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-12-13 12:26:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040393152] [2022-12-13 12:26:55,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:26:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:26:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:26:55,115 INFO L87 Difference]: Start difference. First operand 1199 states and 1562 transitions. Second operand has 23 states, 21 states have (on average 8.857142857142858) internal successors, (186), 16 states have internal predecessors, (186), 6 states have call successors, (44), 2 states have call predecessors, (44), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) [2022-12-13 12:26:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:55,441 INFO L93 Difference]: Finished difference Result 1816 states and 2357 transitions. [2022-12-13 12:26:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:26:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 8.857142857142858) internal successors, (186), 16 states have internal predecessors, (186), 6 states have call successors, (44), 2 states have call predecessors, (44), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) Word has length 392 [2022-12-13 12:26:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:55,444 INFO L225 Difference]: With dead ends: 1816 [2022-12-13 12:26:55,444 INFO L226 Difference]: Without dead ends: 828 [2022-12-13 12:26:55,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 757 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:26:55,447 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 25 mSDsluCounter, 3799 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4004 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:55,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4004 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:26:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-12-13 12:26:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 793. [2022-12-13 12:26:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 602 states have (on average 1.1877076411960132) internal successors, (715), 616 states have internal predecessors, (715), 116 states have call successors, (116), 66 states have call predecessors, (116), 74 states have return successors, (186), 112 states have call predecessors, (186), 114 states have call successors, (186) [2022-12-13 12:26:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1017 transitions. [2022-12-13 12:26:55,496 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1017 transitions. Word has length 392 [2022-12-13 12:26:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:55,496 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1017 transitions. [2022-12-13 12:26:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 8.857142857142858) internal successors, (186), 16 states have internal predecessors, (186), 6 states have call successors, (44), 2 states have call predecessors, (44), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) [2022-12-13 12:26:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1017 transitions. [2022-12-13 12:26:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-13 12:26:55,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:55,499 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 30, 20, 20, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:55,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 12:26:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 12:26:55,700 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1053046022, now seen corresponding path program 3 times [2022-12-13 12:26:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472628077] [2022-12-13 12:26:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:55,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031336306] [2022-12-13 12:26:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:26:55,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:55,775 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:55,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 12:26:56,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 12:26:56,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:26:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 1088 proven. 40 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-12-13 12:26:56,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:57,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:26:57,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 69 [2022-12-13 12:26:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 406 proven. 370 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2022-12-13 12:26:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472628077] [2022-12-13 12:26:57,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:26:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031336306] [2022-12-13 12:26:57,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031336306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:57,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:26:57,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2022-12-13 12:26:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963386758] [2022-12-13 12:26:57,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:26:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:26:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:26:57,655 INFO L87 Difference]: Start difference. First operand 793 states and 1017 transitions. Second operand has 19 states, 16 states have (on average 8.9375) internal successors, (143), 17 states have internal predecessors, (143), 9 states have call successors, (39), 4 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 9 states have call successors, (37) [2022-12-13 12:26:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:26:58,771 INFO L93 Difference]: Finished difference Result 997 states and 1328 transitions. [2022-12-13 12:26:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:26:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 8.9375) internal successors, (143), 17 states have internal predecessors, (143), 9 states have call successors, (39), 4 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 9 states have call successors, (37) Word has length 386 [2022-12-13 12:26:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:26:58,774 INFO L225 Difference]: With dead ends: 997 [2022-12-13 12:26:58,774 INFO L226 Difference]: Without dead ends: 891 [2022-12-13 12:26:58,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 752 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:26:58,774 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 139 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:26:58,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1175 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 12:26:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-12-13 12:26:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 873. [2022-12-13 12:26:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 652 states have (on average 1.1917177914110428) internal successors, (777), 670 states have internal predecessors, (777), 139 states have call successors, (139), 66 states have call predecessors, (139), 81 states have return successors, (245), 138 states have call predecessors, (245), 137 states have call successors, (245) [2022-12-13 12:26:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1161 transitions. [2022-12-13 12:26:58,833 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1161 transitions. Word has length 386 [2022-12-13 12:26:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:26:58,833 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1161 transitions. [2022-12-13 12:26:58,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 8.9375) internal successors, (143), 17 states have internal predecessors, (143), 9 states have call successors, (39), 4 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 9 states have call successors, (37) [2022-12-13 12:26:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1161 transitions. [2022-12-13 12:26:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-12-13 12:26:58,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:26:58,836 INFO L195 NwaCegarLoop]: trace histogram [23, 20, 20, 20, 20, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:58,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 12:26:59,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 12:26:59,037 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:26:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1673236012, now seen corresponding path program 1 times [2022-12-13 12:26:59,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:59,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388938712] [2022-12-13 12:26:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:59,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:26:59,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793708301] [2022-12-13 12:26:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:59,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:59,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:59,147 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 12:26:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 3746 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-13 12:26:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:59,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:27:00,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:27:00,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-12-13 12:27:04,183 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 0 case distinctions, treesize of input 45 treesize of output 32 [2022-12-13 12:27:04,234 INFO L321 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-12-13 12:27:04,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-12-13 12:27:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:27:05,616 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 32 treesize of output 25 [2022-12-13 12:27:06,817 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7021 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_7021))) is different from true [2022-12-13 12:27:15,308 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 12:27:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 535 proven. 22 refuted. 0 times theorem prover too weak. 895 trivial. 3 not checked. [2022-12-13 12:27:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:27:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:27:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388938712] [2022-12-13 12:27:21,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:27:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793708301] [2022-12-13 12:27:21,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793708301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:27:21,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:27:21,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-12-13 12:27:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137688540] [2022-12-13 12:27:21,904 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:27:21,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:27:21,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:27:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:27:21,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=763, Unknown=17, NotChecked=56, Total=930 [2022-12-13 12:27:21,906 INFO L87 Difference]: Start difference. First operand 873 states and 1161 transitions. Second operand has 30 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (33), 8 states have call predecessors, (33), 13 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-12-13 12:27:36,539 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=true, quantifiers [0] [2022-12-13 12:27:40,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:27:42,664 WARN L539 Checker$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 12:27:44,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:27:48,797 WARN L539 Checker$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 12:27:50,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:27:52,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:27:54,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:27:56,881 WARN L539 Checker$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 12:27:58,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:00,891 WARN L539 Checker$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 12:28:02,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:04,933 WARN L539 Checker$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 12:28:06,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:08,979 WARN L539 Checker$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 12:28:10,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:13,013 WARN L539 Checker$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 12:28:15,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:19,227 WARN L539 Checker$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 12:28:25,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:27,393 WARN L539 Checker$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 12:28:31,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:33,500 WARN L539 Checker$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 12:28:35,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:37,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 12:28:41,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:45,979 WARN L539 Checker$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 12:28:47,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:52,045 WARN L539 Checker$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 12:28:54,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:28:56,057 WARN L539 Checker$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 12:28:58,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:00,076 WARN L539 Checker$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 12:29:02,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:04,085 WARN L539 Checker$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 12:29:06,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:08,094 WARN L539 Checker$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 12:29:10,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:12,118 WARN L539 Checker$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 12:29:14,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:16,140 WARN L539 Checker$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 12:29:18,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:20,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:22,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:24,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:26,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:28,204 WARN L539 Checker$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 12:29:30,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:32,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:34,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:36,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:38,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:40,242 WARN L539 Checker$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 12:29:42,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:44,331 WARN L539 Checker$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 12:29:46,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:48,490 WARN L539 Checker$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 12:29:50,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:52,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:54,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:56,544 WARN L539 Checker$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 12:29:58,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:00,554 WARN L539 Checker$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 12:30:02,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:04,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:06,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:08,580 WARN L539 Checker$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 12:30:10,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:12,781 WARN L539 Checker$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 12:30:14,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:17,037 WARN L539 Checker$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 12:30:19,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:25,161 WARN L539 Checker$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 12:30:27,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:33,386 WARN L539 Checker$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 12:30:35,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:37,581 WARN L539 Checker$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 12:30:39,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:41,618 WARN L539 Checker$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 12:30:43,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:46,146 WARN L539 Checker$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 12:30:48,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:50,196 WARN L539 Checker$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 12:30:52,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:54,225 WARN L539 Checker$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 12:30:56,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:30:58,250 WARN L539 Checker$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 12:31:00,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:31:02,404 WARN L539 Checker$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 12:31:04,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:31:06,788 WARN L539 Checker$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 12:31:08,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:31:10,834 WARN L539 Checker$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 12:31:12,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:31:15,131 WARN L539 Checker$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 12:31:17,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:31:19,294 WARN L539 Checker$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 12:31:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:19,382 INFO L93 Difference]: Finished difference Result 1606 states and 2128 transitions. [2022-12-13 12:31:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 12:31:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (33), 8 states have call predecessors, (33), 13 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 377 [2022-12-13 12:31:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:19,387 INFO L225 Difference]: With dead ends: 1606 [2022-12-13 12:31:19,387 INFO L226 Difference]: Without dead ends: 1029 [2022-12-13 12:31:19,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 559 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=421, Invalid=4201, Unknown=74, NotChecked=134, Total=4830 [2022-12-13 12:31:19,390 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 429 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 193 mSolverCounterUnsat, 132 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 132 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 199.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:19,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1398 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3253 Invalid, 132 Unknown, 323 Unchecked, 199.3s Time] [2022-12-13 12:31:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-12-13 12:31:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 950. [2022-12-13 12:31:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 717 states have (on average 1.1827057182705718) internal successors, (848), 739 states have internal predecessors, (848), 145 states have call successors, (145), 71 states have call predecessors, (145), 87 states have return successors, (257), 141 states have call predecessors, (257), 143 states have call successors, (257) [2022-12-13 12:31:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1250 transitions. [2022-12-13 12:31:19,478 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1250 transitions. Word has length 377 [2022-12-13 12:31:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:19,478 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1250 transitions. [2022-12-13 12:31:19,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (33), 8 states have call predecessors, (33), 13 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-12-13 12:31:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1250 transitions. [2022-12-13 12:31:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-13 12:31:19,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:19,481 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 13, 10, 10, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:31:19,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 12:31:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 12:31:19,682 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -702608158, now seen corresponding path program 1 times [2022-12-13 12:31:19,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806016639] [2022-12-13 12:31:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:19,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:19,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806016639] [2022-12-13 12:31:19,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 12:31:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863470591] [2022-12-13 12:31:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:19,820 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:19,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 12:31:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 3656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 12:31:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2022-12-13 12:31:20,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:31:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863470591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:31:20,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:31:20,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:31:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225081063] [2022-12-13 12:31:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:31:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:31:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:31:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:31:20,577 INFO L87 Difference]: Start difference. First operand 950 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-13 12:31:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:20,647 INFO L93 Difference]: Finished difference Result 1813 states and 2370 transitions. [2022-12-13 12:31:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:31:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 344 [2022-12-13 12:31:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:20,649 INFO L225 Difference]: With dead ends: 1813 [2022-12-13 12:31:20,649 INFO L226 Difference]: Without dead ends: 918 [2022-12-13 12:31:20,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:31:20,652 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:20,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 389 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:31:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-12-13 12:31:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 914. [2022-12-13 12:31:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 696 states have (on average 1.1781609195402298) internal successors, (820), 715 states have internal predecessors, (820), 135 states have call successors, (135), 65 states have call predecessors, (135), 82 states have return successors, (238), 135 states have call predecessors, (238), 133 states have call successors, (238) [2022-12-13 12:31:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1193 transitions. [2022-12-13 12:31:20,717 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1193 transitions. Word has length 344 [2022-12-13 12:31:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:20,717 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1193 transitions. [2022-12-13 12:31:20,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-13 12:31:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1193 transitions. [2022-12-13 12:31:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-13 12:31:20,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:20,720 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 13, 10, 10, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:20,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:20,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 12:31:20,920 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash 535614578, now seen corresponding path program 1 times [2022-12-13 12:31:20,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:20,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830297857] [2022-12-13 12:31:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:20,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:20,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:20,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872060377] [2022-12-13 12:31:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:20,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:20,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:20,999 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:21,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 12:31:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 3694 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 12:31:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:22,454 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 43 treesize of output 31 [2022-12-13 12:31:22,456 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 19 [2022-12-13 12:31:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 390 proven. 7 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2022-12-13 12:31:22,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:23,362 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 12:31:23,362 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 30 treesize of output 25 [2022-12-13 12:31:23,372 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 12:31:23,372 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 24 treesize of output 12 [2022-12-13 12:31:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2022-12-13 12:31:23,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830297857] [2022-12-13 12:31:23,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:31:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872060377] [2022-12-13 12:31:23,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872060377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:31:23,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:31:23,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 29 [2022-12-13 12:31:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851348020] [2022-12-13 12:31:23,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:23,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:31:23,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:31:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:31:23,595 INFO L87 Difference]: Start difference. First operand 914 states and 1193 transitions. Second operand has 29 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 11 states have call successors, (51), 2 states have call predecessors, (51), 7 states have return successors, (51), 13 states have call predecessors, (51), 11 states have call successors, (51) [2022-12-13 12:31:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:24,950 INFO L93 Difference]: Finished difference Result 1473 states and 1978 transitions. [2022-12-13 12:31:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 12:31:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 11 states have call successors, (51), 2 states have call predecessors, (51), 7 states have return successors, (51), 13 states have call predecessors, (51), 11 states have call successors, (51) Word has length 344 [2022-12-13 12:31:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:24,953 INFO L225 Difference]: With dead ends: 1473 [2022-12-13 12:31:24,953 INFO L226 Difference]: Without dead ends: 1064 [2022-12-13 12:31:24,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 12:31:24,954 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 90 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:24,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2529 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 12:31:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-12-13 12:31:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 974. [2022-12-13 12:31:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 744 states have (on average 1.1827956989247312) internal successors, (880), 751 states have internal predecessors, (880), 147 states have call successors, (147), 65 states have call predecessors, (147), 82 states have return successors, (250), 159 states have call predecessors, (250), 145 states have call successors, (250) [2022-12-13 12:31:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1277 transitions. [2022-12-13 12:31:25,031 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1277 transitions. Word has length 344 [2022-12-13 12:31:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:25,031 INFO L495 AbstractCegarLoop]: Abstraction has 974 states and 1277 transitions. [2022-12-13 12:31:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 11 states have call successors, (51), 2 states have call predecessors, (51), 7 states have return successors, (51), 13 states have call predecessors, (51), 11 states have call successors, (51) [2022-12-13 12:31:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1277 transitions. [2022-12-13 12:31:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-12-13 12:31:25,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:25,034 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 13, 10, 10, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:25,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:25,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:25,235 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1182439282, now seen corresponding path program 1 times [2022-12-13 12:31:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:25,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958764080] [2022-12-13 12:31:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:25,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449532936] [2022-12-13 12:31:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:25,332 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 12:31:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:25,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 3702 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:31:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-13 12:31:25,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:31:25,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958764080] [2022-12-13 12:31:25,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:31:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449532936] [2022-12-13 12:31:25,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449532936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:31:25,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:31:25,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:31:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424117904] [2022-12-13 12:31:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:31:25,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:31:25,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:31:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:31:25,968 INFO L87 Difference]: Start difference. First operand 974 states and 1277 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-13 12:31:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:26,177 INFO L93 Difference]: Finished difference Result 1784 states and 2386 transitions. [2022-12-13 12:31:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:31:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 356 [2022-12-13 12:31:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:26,181 INFO L225 Difference]: With dead ends: 1784 [2022-12-13 12:31:26,181 INFO L226 Difference]: Without dead ends: 938 [2022-12-13 12:31:26,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:31:26,183 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 15 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:26,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 719 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:31:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-12-13 12:31:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 933. [2022-12-13 12:31:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 710 states have (on average 1.180281690140845) internal successors, (838), 720 states have internal predecessors, (838), 142 states have call successors, (142), 65 states have call predecessors, (142), 80 states have return successors, (236), 149 states have call predecessors, (236), 140 states have call successors, (236) [2022-12-13 12:31:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1216 transitions. [2022-12-13 12:31:26,253 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1216 transitions. Word has length 356 [2022-12-13 12:31:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:26,253 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1216 transitions. [2022-12-13 12:31:26,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-13 12:31:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1216 transitions. [2022-12-13 12:31:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-12-13 12:31:26,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:26,256 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 13, 10, 10, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:26,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 12:31:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 12:31:26,456 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash -151398384, now seen corresponding path program 2 times [2022-12-13 12:31:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013528588] [2022-12-13 12:31:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:26,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:26,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710993548] [2022-12-13 12:31:26,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:31:26,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:26,516 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:26,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 12:31:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:31:27,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 3697 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:31:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-12-13 12:31:27,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:31:27,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013528588] [2022-12-13 12:31:27,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:31:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710993548] [2022-12-13 12:31:27,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710993548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:31:27,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:31:27,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 12:31:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767933472] [2022-12-13 12:31:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:31:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:31:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:31:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:31:27,786 INFO L87 Difference]: Start difference. First operand 933 states and 1216 transitions. Second operand has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 11 states have internal predecessors, (142), 3 states have call successors, (32), 2 states have call predecessors, (32), 7 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-13 12:31:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:28,091 INFO L93 Difference]: Finished difference Result 1453 states and 1940 transitions. [2022-12-13 12:31:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:31:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 11 states have internal predecessors, (142), 3 states have call successors, (32), 2 states have call predecessors, (32), 7 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) Word has length 356 [2022-12-13 12:31:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:28,094 INFO L225 Difference]: With dead ends: 1453 [2022-12-13 12:31:28,094 INFO L226 Difference]: Without dead ends: 890 [2022-12-13 12:31:28,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:31:28,096 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 17 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:28,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2705 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:31:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-12-13 12:31:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 870. [2022-12-13 12:31:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 666 states have (on average 1.1756756756756757) internal successors, (783), 681 states have internal predecessors, (783), 126 states have call successors, (126), 63 states have call predecessors, (126), 77 states have return successors, (203), 127 states have call predecessors, (203), 124 states have call successors, (203) [2022-12-13 12:31:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1112 transitions. [2022-12-13 12:31:28,159 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1112 transitions. Word has length 356 [2022-12-13 12:31:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:28,160 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1112 transitions. [2022-12-13 12:31:28,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 11 states have internal predecessors, (142), 3 states have call successors, (32), 2 states have call predecessors, (32), 7 states have return successors, (32), 6 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-13 12:31:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1112 transitions. [2022-12-13 12:31:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-12-13 12:31:28,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:28,162 INFO L195 NwaCegarLoop]: trace histogram [23, 20, 20, 20, 20, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:31:28,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 12:31:28,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:31:28,364 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1795310469, now seen corresponding path program 1 times [2022-12-13 12:31:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:28,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237570917] [2022-12-13 12:31:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:28,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:28,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:28,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405027148] [2022-12-13 12:31:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:28,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:28,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:28,468 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 12:31:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 3745 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:31:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-12-13 12:31:29,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:31:29,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237570917] [2022-12-13 12:31:29,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:31:29,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405027148] [2022-12-13 12:31:29,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405027148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:31:29,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:31:29,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:31:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407761744] [2022-12-13 12:31:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:31:29,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:31:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:31:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:31:29,244 INFO L87 Difference]: Start difference. First operand 870 states and 1112 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-12-13 12:31:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:29,437 INFO L93 Difference]: Finished difference Result 1565 states and 2033 transitions. [2022-12-13 12:31:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:31:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 373 [2022-12-13 12:31:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:29,440 INFO L225 Difference]: With dead ends: 1565 [2022-12-13 12:31:29,440 INFO L226 Difference]: Without dead ends: 823 [2022-12-13 12:31:29,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:31:29,442 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 10 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:29,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 741 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:31:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-12-13 12:31:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 823. [2022-12-13 12:31:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 626 states have (on average 1.170926517571885) internal successors, (733), 643 states have internal predecessors, (733), 122 states have call successors, (122), 63 states have call predecessors, (122), 74 states have return successors, (187), 118 states have call predecessors, (187), 120 states have call successors, (187) [2022-12-13 12:31:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1042 transitions. [2022-12-13 12:31:29,514 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1042 transitions. Word has length 373 [2022-12-13 12:31:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:29,514 INFO L495 AbstractCegarLoop]: Abstraction has 823 states and 1042 transitions. [2022-12-13 12:31:29,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-12-13 12:31:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1042 transitions. [2022-12-13 12:31:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-12-13 12:31:29,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:29,516 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 14, 11, 11, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:29,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:29,718 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1907327593, now seen corresponding path program 2 times [2022-12-13 12:31:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:29,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565043057] [2022-12-13 12:31:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:29,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:29,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874785704] [2022-12-13 12:31:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:31:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:29,827 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:29,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 12:31:30,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:31:30,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 3696 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-13 12:31:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:30,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:31:31,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:31:31,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-12-13 12:31:31,298 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 0 case distinctions, treesize of input 43 treesize of output 30 [2022-12-13 12:31:31,350 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-13 12:31:31,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-12-13 12:31:31,395 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 13 treesize of output 11 [2022-12-13 12:31:31,398 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 27 treesize of output 15 [2022-12-13 12:31:31,597 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-13 12:31:31,599 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 12:31:31,629 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|bounded_malloc_#res.base| Int) (v_ArrVal_10013 Int)) (and (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| v_ArrVal_10013)) (= (select |c_old(#valid)| |bounded_malloc_#res.base|) 0))) (exists ((v_ArrVal_10014 Int) (v_ArrVal_10016 Int) (ensure_array_list_has_allocated_data_member_~list.offset Int)) (and (<= |c_ensure_array_list_has_allocated_data_member_#in~list.offset| ensure_array_list_has_allocated_data_member_~list.offset) (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) (+ ensure_array_list_has_allocated_data_member_~list.offset 32) v_ArrVal_10014) ensure_array_list_has_allocated_data_member_~list.offset v_ArrVal_10016)) |c_#memory_$Pointer$.base|)))) is different from true [2022-12-13 12:31:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:31:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:31:31,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 42 [2022-12-13 12:31:31,684 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-12-13 12:31:31,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 39 [2022-12-13 12:31:31,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:31:31,716 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 46 treesize of output 33 [2022-12-13 12:31:31,788 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 13 treesize of output 11 [2022-12-13 12:31:31,791 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 27 treesize of output 15 [2022-12-13 12:31:31,901 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 5 treesize of output 3 [2022-12-13 12:31:31,953 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10020 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_10020))) is different from true [2022-12-13 12:31:32,442 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 20 [2022-12-13 12:31:32,445 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 20 treesize of output 16 [2022-12-13 12:31:32,448 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 5 treesize of output 3 [2022-12-13 12:31:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 137 proven. 33 refuted. 3 times theorem prover too weak. 788 trivial. 2 not checked. [2022-12-13 12:31:32,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565043057] [2022-12-13 12:31:32,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:31:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874785704] [2022-12-13 12:31:32,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874785704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:31:32,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:31:32,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-12-13 12:31:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885731869] [2022-12-13 12:31:32,881 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:32,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:31:32,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:31:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=833, Unknown=10, NotChecked=118, Total=1056 [2022-12-13 12:31:32,882 INFO L87 Difference]: Start difference. First operand 823 states and 1042 transitions. Second operand has 32 states, 30 states have (on average 4.5) internal successors, (135), 26 states have internal predecessors, (135), 15 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (30), 13 states have call predecessors, (30), 15 states have call successors, (30) [2022-12-13 12:31:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:31:41,569 INFO L93 Difference]: Finished difference Result 1535 states and 1987 transitions. [2022-12-13 12:31:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 12:31:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 4.5) internal successors, (135), 26 states have internal predecessors, (135), 15 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (30), 13 states have call predecessors, (30), 15 states have call successors, (30) Word has length 345 [2022-12-13 12:31:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:31:41,573 INFO L225 Difference]: With dead ends: 1535 [2022-12-13 12:31:41,573 INFO L226 Difference]: Without dead ends: 985 [2022-12-13 12:31:41,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 532 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=403, Invalid=3742, Unknown=23, NotChecked=254, Total=4422 [2022-12-13 12:31:41,576 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 381 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 235 mSolverCounterUnsat, 76 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 76 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-13 12:31:41,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1609 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3460 Invalid, 76 Unknown, 589 Unchecked, 6.7s Time] [2022-12-13 12:31:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-12-13 12:31:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 919. [2022-12-13 12:31:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 709 states have (on average 1.1678420310296191) internal successors, (828), 728 states have internal predecessors, (828), 129 states have call successors, (129), 64 states have call predecessors, (129), 80 states have return successors, (222), 128 states have call predecessors, (222), 127 states have call successors, (222) [2022-12-13 12:31:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1179 transitions. [2022-12-13 12:31:41,650 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1179 transitions. Word has length 345 [2022-12-13 12:31:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:31:41,651 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1179 transitions. [2022-12-13 12:31:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 4.5) internal successors, (135), 26 states have internal predecessors, (135), 15 states have call successors, (31), 7 states have call predecessors, (31), 11 states have return successors, (30), 13 states have call predecessors, (30), 15 states have call successors, (30) [2022-12-13 12:31:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1179 transitions. [2022-12-13 12:31:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-12-13 12:31:41,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:31:41,653 INFO L195 NwaCegarLoop]: trace histogram [24, 21, 21, 20, 20, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:31:41,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 12:31:41,855 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:31:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1533800844, now seen corresponding path program 1 times [2022-12-13 12:31:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914957972] [2022-12-13 12:31:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:41,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:31:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194714138] [2022-12-13 12:31:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:41,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:41,965 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:41,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537db7a7-1531-4022-ac54-e8877d8596b0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 12:31:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 3714 conjuncts, 263 conjunts are in the unsatisfiable core [2022-12-13 12:31:43,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:43,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:31:43,884 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 0 case distinctions, treesize of input 12 treesize of output 9