./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/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_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/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_0b95a382-9384-454c-b946-fdb9adee1922/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 fd704c0997d5526a33ae946f9f6b6d8e05b412ad44e87cb653981b428eeb987a --- 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 17:27:33,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:27:33,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:27:33,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:27:33,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:27:33,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:27:33,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:27:33,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:27:33,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:27:33,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:27:33,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:27:33,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:27:33,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:27:33,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:27:33,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:27:33,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:27:33,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:27:33,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:27:33,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:27:33,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:27:33,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:27:33,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:27:33,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:27:33,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:27:33,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:27:33,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:27:33,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:27:33,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:27:33,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:27:33,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:27:33,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:27:33,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:27:33,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:27:33,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:27:33,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:27:33,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:27:33,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:27:33,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:27:33,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:27:33,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:27:33,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:27:33,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 17:27:33,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:27:33,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:27:33,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:27:33,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:27:33,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:27:33,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:27:33,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:27:33,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:27:33,690 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:27:33,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:27:33,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:27:33,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:27:33,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:27:33,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:27:33,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:27:33,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:27:33,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:27:33,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:27:33,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:27:33,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:27:33,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:27:33,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:27:33,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:27:33,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:27:33,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:27:33,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:27:33,694 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:27:33,694 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_0b95a382-9384-454c-b946-fdb9adee1922/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd704c0997d5526a33ae946f9f6b6d8e05b412ad44e87cb653981b428eeb987a [2022-12-13 17:27:33,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:27:33,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:27:33,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:27:33,898 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:27:33,898 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:27:33,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i [2022-12-13 17:27:36,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:27:36,797 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:27:36,798 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i [2022-12-13 17:27:36,819 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/data/6acfb6823/c4ded18592c04f9682c5a9227b6e369b/FLAG96219e2db [2022-12-13 17:27:36,832 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/data/6acfb6823/c4ded18592c04f9682c5a9227b6e369b [2022-12-13 17:27:36,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:27:36,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:27:36,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:27:36,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:27:36,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:27:36,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:27:36" (1/1) ... [2022-12-13 17:27:36,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35619380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:36, skipping insertion in model container [2022-12-13 17:27:36,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:27:36" (1/1) ... [2022-12-13 17:27:36,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:27:36,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:27:37,063 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_0b95a382-9384-454c-b946-fdb9adee1922/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4505,4518] [2022-12-13 17:27:37,069 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_0b95a382-9384-454c-b946-fdb9adee1922/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4565,4578] [2022-12-13 17:27:37,631 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 17:27:37,665 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:37,674 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:37,679 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,679 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,681 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,684 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:37,690 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,691 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:37,761 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:37,761 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:37,762 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:37,765 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 17:27:37,767 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 17:27:37,767 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 17:27:37,891 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,024 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 17:27:38,025 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 17:27:38,025 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 17:27:38,026 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 17:27:38,027 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 17:27:38,028 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 17:27:38,029 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 17:27:38,029 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 17:27:38,029 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 17:27:38,030 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 17:27:38,030 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 17:27:38,161 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,162 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,163 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,163 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,181 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,197 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 17:27:38,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:27:38,222 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:27:38,232 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_0b95a382-9384-454c-b946-fdb9adee1922/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4505,4518] [2022-12-13 17:27:38,232 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_0b95a382-9384-454c-b946-fdb9adee1922/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness.i[4565,4578] [2022-12-13 17:27:38,257 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 17:27:38,262 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,267 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,269 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,270 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,270 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,270 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,271 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,273 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,276 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,277 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,278 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,278 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,283 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:38,284 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:38,284 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 17:27:38,286 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 17:27:38,287 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 17:27:38,288 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 17:27:38,290 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,305 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 17:27:38,306 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 17:27:38,307 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 17:27:38,307 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 17:27:38,308 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 17:27:38,308 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 17:27:38,309 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 17:27:38,309 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 17:27:38,309 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 17:27:38,310 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 17:27:38,310 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 17:27:38,331 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,332 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,333 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,333 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 17:27:38,337 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 17:27:38,346 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 17:27:38,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:27:38,478 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:27:38,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38 WrapperNode [2022-12-13 17:27:38,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:27:38,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:27:38,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:27:38,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:27:38,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,555 INFO L138 Inliner]: procedures = 689, calls = 1513, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 735 [2022-12-13 17:27:38,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:27:38,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:27:38,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:27:38,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:27:38,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,592 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:27:38,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:27:38,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:27:38,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:27:38,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (1/1) ... [2022-12-13 17:27:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:27:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:38,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:27:38,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:27:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-13 17:27:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-12-13 17:27:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-13 17:27:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-12-13 17:27:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:27:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-12-13 17:27:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 17:27:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:27:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:27:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-13 17:27:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-13 17:27:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-12-13 17:27:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-12-13 17:27:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-12-13 17:27:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-12-13 17:27:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-12-13 17:27:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-12-13 17:27:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 17:27:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-13 17:27:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-12-13 17:27:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:27:38,665 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-12-13 17:27:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-12-13 17:27:38,666 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-12-13 17:27:38,666 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-12-13 17:27:38,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:27:38,873 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:27:38,875 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:27:39,740 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:27:39,745 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:27:39,745 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 17:27:39,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:27:39 BoogieIcfgContainer [2022-12-13 17:27:39,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:27:39,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:27:39,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:27:39,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:27:39,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:27:36" (1/3) ... [2022-12-13 17:27:39,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57856d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:27:39, skipping insertion in model container [2022-12-13 17:27:39,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:38" (2/3) ... [2022-12-13 17:27:39,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57856d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:27:39, skipping insertion in model container [2022-12-13 17:27:39,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:27:39" (3/3) ... [2022-12-13 17:27:39,753 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness.i [2022-12-13 17:27:39,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:27:39,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:27:39,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:27:39,808 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;@a6e9f24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:27:39,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:27:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 129 states have internal predecessors, (163), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-13 17:27:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-13 17:27:39,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:39,819 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-12-13 17:27:39,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash -657799819, now seen corresponding path program 1 times [2022-12-13 17:27:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732571773] [2022-12-13 17:27:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732571773] [2022-12-13 17:27:40,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 17:27:40,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968527126] [2022-12-13 17:27:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:40,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:40,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:27:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 17:27:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-12-13 17:27:40,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:27:40,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968527126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:40,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:40,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:27:40,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102213569] [2022-12-13 17:27:40,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:40,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:27:40,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:27:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:27:40,541 INFO L87 Difference]: Start difference. First operand has 197 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 129 states have internal predecessors, (163), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-13 17:27:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:40,585 INFO L93 Difference]: Finished difference Result 389 states and 571 transitions. [2022-12-13 17:27:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:27:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 99 [2022-12-13 17:27:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:40,597 INFO L225 Difference]: With dead ends: 389 [2022-12-13 17:27:40,597 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 17:27:40,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:27:40,613 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:40,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:27:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 17:27:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-12-13 17:27:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 17:27:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2022-12-13 17:27:40,665 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 99 [2022-12-13 17:27:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:40,666 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2022-12-13 17:27:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-13 17:27:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2022-12-13 17:27:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 17:27:40,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:40,672 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-12-13 17:27:40,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:40,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 17:27:40,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1585195372, now seen corresponding path program 1 times [2022-12-13 17:27:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:40,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545885677] [2022-12-13 17:27:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:41,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:41,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368251168] [2022-12-13 17:27:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:41,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:41,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:27:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:27:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-12-13 17:27:41,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-12-13 17:27:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545885677] [2022-12-13 17:27:41,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368251168] [2022-12-13 17:27:41,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368251168] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:41,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:27:41,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-12-13 17:27:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870279842] [2022-12-13 17:27:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:41,747 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-13 17:27:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:41,816 INFO L93 Difference]: Finished difference Result 198 states and 261 transitions. [2022-12-13 17:27:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:27:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) Word has length 133 [2022-12-13 17:27:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:41,820 INFO L225 Difference]: With dead ends: 198 [2022-12-13 17:27:41,820 INFO L226 Difference]: Without dead ends: 196 [2022-12-13 17:27:41,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:41,821 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 6 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:41,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 983 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:27:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-13 17:27:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-12-13 17:27:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 1.2258064516129032) internal successors, (152), 127 states have internal predecessors, (152), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 258 transitions. [2022-12-13 17:27:41,839 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 258 transitions. Word has length 133 [2022-12-13 17:27:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:41,840 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 258 transitions. [2022-12-13 17:27:41,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2022-12-13 17:27:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 258 transitions. [2022-12-13 17:27:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 17:27:41,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:41,842 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-12-13 17:27:41,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:27:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:42,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1587042414, now seen corresponding path program 1 times [2022-12-13 17:27:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054526562] [2022-12-13 17:27:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:42,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424038646] [2022-12-13 17:27:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:42,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:42,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:42,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:27:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:27:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-13 17:27:42,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:27:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054526562] [2022-12-13 17:27:42,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424038646] [2022-12-13 17:27:42,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424038646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:42,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:42,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 17:27:42,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047004254] [2022-12-13 17:27:42,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:42,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:27:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:27:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:27:42,481 INFO L87 Difference]: Start difference. First operand 195 states and 258 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 17:27:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:42,549 INFO L93 Difference]: Finished difference Result 379 states and 496 transitions. [2022-12-13 17:27:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:27:42,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2022-12-13 17:27:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:42,553 INFO L225 Difference]: With dead ends: 379 [2022-12-13 17:27:42,553 INFO L226 Difference]: Without dead ends: 195 [2022-12-13 17:27:42,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 17:27:42,555 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 13 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:42,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1207 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:27:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-13 17:27:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-13 17:27:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 1.217741935483871) internal successors, (151), 127 states have internal predecessors, (151), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2022-12-13 17:27:42,570 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 133 [2022-12-13 17:27:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:42,570 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2022-12-13 17:27:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 17:27:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2022-12-13 17:27:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-13 17:27:42,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:42,573 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-12-13 17:27:42,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:27:42,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:42,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1650813770, now seen corresponding path program 1 times [2022-12-13 17:27:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:42,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185125117] [2022-12-13 17:27:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:42,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797929095] [2022-12-13 17:27:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:42,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:42,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:27:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:27:43,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-13 17:27:43,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:27:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185125117] [2022-12-13 17:27:43,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797929095] [2022-12-13 17:27:43,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797929095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:43,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:43,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:27:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651669264] [2022-12-13 17:27:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:43,355 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 17:27:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:43,394 INFO L93 Difference]: Finished difference Result 375 states and 493 transitions. [2022-12-13 17:27:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:43,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2022-12-13 17:27:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:43,396 INFO L225 Difference]: With dead ends: 375 [2022-12-13 17:27:43,396 INFO L226 Difference]: Without dead ends: 197 [2022-12-13 17:27:43,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:43,397 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 10 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:43,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 724 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:27:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-13 17:27:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-12-13 17:27:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 125 states have (on average 1.216) internal successors, (152), 128 states have internal predecessors, (152), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 258 transitions. [2022-12-13 17:27:43,406 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 258 transitions. Word has length 135 [2022-12-13 17:27:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:43,407 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 258 transitions. [2022-12-13 17:27:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 17:27:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 258 transitions. [2022-12-13 17:27:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-13 17:27:43,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:43,408 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-12-13 17:27:43,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:27:43,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 17:27:43,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 574277750, now seen corresponding path program 1 times [2022-12-13 17:27:43,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248449019] [2022-12-13 17:27:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:43,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:43,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839676526] [2022-12-13 17:27:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:43,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:43,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:43,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:27:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:27:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 17:27:44,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 17:27:44,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248449019] [2022-12-13 17:27:44,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839676526] [2022-12-13 17:27:44,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839676526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:44,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:27:44,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-13 17:27:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129466683] [2022-12-13 17:27:44,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:44,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:44,531 INFO L87 Difference]: Start difference. First operand 196 states and 258 transitions. Second operand has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:27:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:44,669 INFO L93 Difference]: Finished difference Result 384 states and 500 transitions. [2022-12-13 17:27:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:27:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 139 [2022-12-13 17:27:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:44,672 INFO L225 Difference]: With dead ends: 384 [2022-12-13 17:27:44,672 INFO L226 Difference]: Without dead ends: 199 [2022-12-13 17:27:44,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 264 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 17:27:44,674 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 18 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:44,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1927 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:27:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-13 17:27:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-12-13 17:27:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 130 states have internal predecessors, (154), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-12-13 17:27:44,686 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 139 [2022-12-13 17:27:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:44,686 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-12-13 17:27:44,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:27:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-12-13 17:27:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-13 17:27:44,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:44,688 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 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] [2022-12-13 17:27:44,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:27:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:44,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1733366986, now seen corresponding path program 2 times [2022-12-13 17:27:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874575468] [2022-12-13 17:27:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:45,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:45,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570880633] [2022-12-13 17:27:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:45,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:45,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:45,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:27:46,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:27:46,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-12-13 17:27:46,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-12-13 17:27:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874575468] [2022-12-13 17:27:46,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570880633] [2022-12-13 17:27:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570880633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:46,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:27:46,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-13 17:27:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269828591] [2022-12-13 17:27:46,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:27:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:27:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:27:46,788 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-12-13 17:27:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:46,937 INFO L93 Difference]: Finished difference Result 388 states and 504 transitions. [2022-12-13 17:27:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:27:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 143 [2022-12-13 17:27:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:46,940 INFO L225 Difference]: With dead ends: 388 [2022-12-13 17:27:46,940 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 17:27:46,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:27:46,941 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 21 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:46,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1929 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:27:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 17:27:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-12-13 17:27:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 129 states have (on average 1.2093023255813953) internal successors, (156), 132 states have internal predecessors, (156), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2022-12-13 17:27:46,952 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 143 [2022-12-13 17:27:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:46,952 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2022-12-13 17:27:46,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-12-13 17:27:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2022-12-13 17:27:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-13 17:27:46,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:46,954 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 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] [2022-12-13 17:27:46,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:27:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:47,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 833600758, now seen corresponding path program 3 times [2022-12-13 17:27:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693396858] [2022-12-13 17:27:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:47,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:47,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531390542] [2022-12-13 17:27:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:47,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:47,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:47,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:27:48,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:27:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:27:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-13 17:27:49,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-12-13 17:27:49,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693396858] [2022-12-13 17:27:49,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531390542] [2022-12-13 17:27:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531390542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:49,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:27:49,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-12-13 17:27:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447181593] [2022-12-13 17:27:49,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:27:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:27:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:27:49,553 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 17:27:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:49,926 INFO L93 Difference]: Finished difference Result 392 states and 508 transitions. [2022-12-13 17:27:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:27:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 147 [2022-12-13 17:27:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:49,928 INFO L225 Difference]: With dead ends: 392 [2022-12-13 17:27:49,929 INFO L226 Difference]: Without dead ends: 203 [2022-12-13 17:27:49,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:27:49,930 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 27 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:49,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2878 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:27:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-13 17:27:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-12-13 17:27:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 134 states have internal predecessors, (158), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2022-12-13 17:27:49,942 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 147 [2022-12-13 17:27:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:49,942 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2022-12-13 17:27:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 17:27:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2022-12-13 17:27:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-13 17:27:49,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:49,943 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 8, 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] [2022-12-13 17:27:49,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:27:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:50,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 579206582, now seen corresponding path program 4 times [2022-12-13 17:27:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840228104] [2022-12-13 17:27:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:50,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:50,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547297456] [2022-12-13 17:27:50,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:50,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:50,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:50,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:27:50,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:27:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-12-13 17:27:50,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-13 17:27:51,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:51,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840228104] [2022-12-13 17:27:51,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:51,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547297456] [2022-12-13 17:27:51,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547297456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:51,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:27:51,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-12-13 17:27:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537705178] [2022-12-13 17:27:51,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:51,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:27:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:27:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:27:51,282 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand has 21 states, 19 states have (on average 4.684210526315789) internal successors, (89), 21 states have internal predecessors, (89), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 17:27:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:51,515 INFO L93 Difference]: Finished difference Result 396 states and 512 transitions. [2022-12-13 17:27:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:27:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.684210526315789) internal successors, (89), 21 states have internal predecessors, (89), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 151 [2022-12-13 17:27:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:51,517 INFO L225 Difference]: With dead ends: 396 [2022-12-13 17:27:51,517 INFO L226 Difference]: Without dead ends: 205 [2022-12-13 17:27:51,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:27:51,518 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 20 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:51,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3117 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:27:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-13 17:27:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-12-13 17:27:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 136 states have internal predecessors, (160), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 266 transitions. [2022-12-13 17:27:51,524 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 266 transitions. Word has length 151 [2022-12-13 17:27:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:51,524 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 266 transitions. [2022-12-13 17:27:51,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.684210526315789) internal successors, (89), 21 states have internal predecessors, (89), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 17:27:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 266 transitions. [2022-12-13 17:27:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-13 17:27:51,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:51,525 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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] [2022-12-13 17:27:51,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:27:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:27:51,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -519410314, now seen corresponding path program 5 times [2022-12-13 17:27:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378503614] [2022-12-13 17:27:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:51,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:51,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207056607] [2022-12-13 17:27:51,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:51,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:51,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:27:53,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 17:27:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:53,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:27:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 209 proven. 25 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-13 17:27:53,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 17:27:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378503614] [2022-12-13 17:27:53,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:27:53,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207056607] [2022-12-13 17:27:53,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207056607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:53,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:27:53,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-13 17:27:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749812952] [2022-12-13 17:27:53,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:27:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:27:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:27:53,677 INFO L87 Difference]: Start difference. First operand 204 states and 266 transitions. Second operand has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:27:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:27:53,930 INFO L93 Difference]: Finished difference Result 400 states and 516 transitions. [2022-12-13 17:27:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:27:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 155 [2022-12-13 17:27:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:27:53,932 INFO L225 Difference]: With dead ends: 400 [2022-12-13 17:27:53,932 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 17:27:53,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 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 17:27:53,933 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 18 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3378 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:27:53,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3378 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:27:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 17:27:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-12-13 17:27:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 135 states have (on average 1.2) internal successors, (162), 138 states have internal predecessors, (162), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:27:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-12-13 17:27:53,945 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 155 [2022-12-13 17:27:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:27:53,945 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-12-13 17:27:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:27:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-12-13 17:27:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-13 17:27:53,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:27:53,948 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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] [2022-12-13 17:27:53,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 17:27:54,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:27:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1604701238, now seen corresponding path program 6 times [2022-12-13 17:27:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:54,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125101530] [2022-12-13 17:27:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:54,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:27:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491110696] [2022-12-13 17:27:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:54,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:54,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:54,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:54,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:40:40,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 17:40:40,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:40:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:40:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:40:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-12-13 17:40:41,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:40:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 94 proven. 36 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-12-13 17:40:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:40:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125101530] [2022-12-13 17:40:41,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:40:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491110696] [2022-12-13 17:40:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491110696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:40:41,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:40:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2022-12-13 17:40:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593508701] [2022-12-13 17:40:41,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:40:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:40:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:40:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:40:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:40:41,678 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 30 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 30 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 17:40:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:40:42,324 INFO L93 Difference]: Finished difference Result 404 states and 520 transitions. [2022-12-13 17:40:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:40:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 30 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 159 [2022-12-13 17:40:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:40:42,327 INFO L225 Difference]: With dead ends: 404 [2022-12-13 17:40:42,327 INFO L226 Difference]: Without dead ends: 209 [2022-12-13 17:40:42,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 17:40:42,329 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 23 mSDsluCounter, 4108 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4353 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:40:42,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4353 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:40:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-13 17:40:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-12-13 17:40:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.197080291970803) internal successors, (164), 140 states have internal predecessors, (164), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:40:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 270 transitions. [2022-12-13 17:40:42,341 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 270 transitions. Word has length 159 [2022-12-13 17:40:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:40:42,341 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 270 transitions. [2022-12-13 17:40:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 30 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 17:40:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 270 transitions. [2022-12-13 17:40:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-13 17:40:42,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:40:42,343 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 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] [2022-12-13 17:40:42,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:40:42,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:40:42,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:40:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:40:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1230035446, now seen corresponding path program 7 times [2022-12-13 17:40:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:40:42,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102907305] [2022-12-13 17:40:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:40:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:40:42,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:40:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552741181] [2022-12-13 17:40:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:40:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:42,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:40:42,643 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:40:42,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:40:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:40:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:40:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:40:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 9 proven. 168 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-13 17:40:43,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:40:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 122 proven. 49 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-13 17:40:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:40:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102907305] [2022-12-13 17:40:43,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:40:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552741181] [2022-12-13 17:40:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552741181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:40:43,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:40:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2022-12-13 17:40:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742941743] [2022-12-13 17:40:43,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:40:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:40:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:40:43,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:40:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-12-13 17:40:43,988 INFO L87 Difference]: Start difference. First operand 208 states and 270 transitions. Second operand has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 17:40:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:40:44,431 INFO L93 Difference]: Finished difference Result 408 states and 524 transitions. [2022-12-13 17:40:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:40:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 163 [2022-12-13 17:40:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:40:44,434 INFO L225 Difference]: With dead ends: 408 [2022-12-13 17:40:44,434 INFO L226 Difference]: Without dead ends: 211 [2022-12-13 17:40:44,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:40:44,435 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 19 mSDsluCounter, 3841 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4084 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:40:44,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 4084 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:40:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-13 17:40:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-12-13 17:40:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 142 states have internal predecessors, (166), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:40:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 272 transitions. [2022-12-13 17:40:44,445 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 272 transitions. Word has length 163 [2022-12-13 17:40:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:40:44,445 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 272 transitions. [2022-12-13 17:40:44,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 17:40:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 272 transitions. [2022-12-13 17:40:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 17:40:44,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:40:44,447 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 12, 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] [2022-12-13 17:40:44,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:40:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:44,648 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:40:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:40:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1033131702, now seen corresponding path program 8 times [2022-12-13 17:40:44,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:40:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861285426] [2022-12-13 17:40:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:40:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:40:44,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:40:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240441866] [2022-12-13 17:40:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:40:44,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:40:44,729 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:40:44,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:40:46,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:40:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:40:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:40:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:40:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-13 17:40:46,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:40:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-12-13 17:40:46,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:40:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861285426] [2022-12-13 17:40:46,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:40:46,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240441866] [2022-12-13 17:40:46,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240441866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:40:46,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:40:46,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-12-13 17:40:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158104131] [2022-12-13 17:40:46,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:40:46,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:40:46,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:40:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:40:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-12-13 17:40:46,725 INFO L87 Difference]: Start difference. First operand 210 states and 272 transitions. Second operand has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:40:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:40:46,994 INFO L93 Difference]: Finished difference Result 412 states and 528 transitions. [2022-12-13 17:40:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:40:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 167 [2022-12-13 17:40:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:40:46,996 INFO L225 Difference]: With dead ends: 412 [2022-12-13 17:40:46,997 INFO L226 Difference]: Without dead ends: 213 [2022-12-13 17:40:46,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:40:46,998 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 22 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:40:46,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3867 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:40:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-13 17:40:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-12-13 17:40:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-13 17:40:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 274 transitions. [2022-12-13 17:40:47,007 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 274 transitions. Word has length 167 [2022-12-13 17:40:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:40:47,007 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 274 transitions. [2022-12-13 17:40:47,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 17:40:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 274 transitions. [2022-12-13 17:40:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-13 17:40:47,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:40:47,008 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 12, 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] [2022-12-13 17:40:47,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 17:40:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:47,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:40:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:40:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 210305654, now seen corresponding path program 9 times [2022-12-13 17:40:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:40:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451961225] [2022-12-13 17:40:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:40:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:40:47,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:40:47,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988512019] [2022-12-13 17:40:47,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:40:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:40:47,260 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:40:47,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b95a382-9384-454c-b946-fdb9adee1922/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process