./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 355537246d5dfb9690a92cc5d0cbf014736bcc62122f38f5559ea0fbf5331d1c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:41:42,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:41:42,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:41:42,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:41:42,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:41:42,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:41:42,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:41:42,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:41:42,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:41:42,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:41:42,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:41:42,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:41:42,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:41:42,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:41:42,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:41:42,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:41:42,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:41:42,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:41:42,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:41:42,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:41:42,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:41:42,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:41:42,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:41:42,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:41:42,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:41:42,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:41:42,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:41:42,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:41:42,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:41:42,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:41:42,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:41:42,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:41:42,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:41:42,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:41:42,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:41:42,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:41:42,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:41:42,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:41:42,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:41:42,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:41:42,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:41:42,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 05:41:42,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:41:42,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:41:42,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:41:42,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:41:42,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:41:42,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:41:42,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:41:42,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:41:42,575 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:41:42,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:41:42,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:41:42,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:41:42,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:41:42,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:41:42,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:41:42,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:41:42,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:41:42,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:41:42,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:41:42,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:41:42,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:41:42,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:41:42,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:41:42,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:41:42,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:41:42,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:41:42,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:41:42,581 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:41:42,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:41:42,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:41:42,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:41:42,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355537246d5dfb9690a92cc5d0cbf014736bcc62122f38f5559ea0fbf5331d1c [2021-11-20 05:41:42,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:41:42,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:41:42,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:41:42,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:41:42,903 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:41:42,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i [2021-11-20 05:41:42,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/data/6ee178da3/bed542be5d7c444eb367cefa6ee587a1/FLAG051fd76fc [2021-11-20 05:41:43,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:41:43,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i [2021-11-20 05:41:43,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/data/6ee178da3/bed542be5d7c444eb367cefa6ee587a1/FLAG051fd76fc [2021-11-20 05:41:44,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/data/6ee178da3/bed542be5d7c444eb367cefa6ee587a1 [2021-11-20 05:41:44,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:41:44,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:41:44,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:41:44,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:41:44,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:41:44,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:41:44" (1/1) ... [2021-11-20 05:41:44,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425f106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:44, skipping insertion in model container [2021-11-20 05:41:44,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:41:44" (1/1) ... [2021-11-20 05:41:44,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:41:44,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:41:44,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4506,4519] [2021-11-20 05:41:44,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4566,4579] [2021-11-20 05:41:45,997 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:45,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:45,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:45,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,001 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,015 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,022 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,513 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:41:46,514 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:41:46,516 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:41:46,517 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:41:46,518 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:41:46,519 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:41:46,520 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:41:46,521 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:41:46,522 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:41:46,522 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:41:46,712 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:41:46,734 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,735 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,740 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,826 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,829 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,837 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,842 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,843 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,884 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:41:46,925 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:41:46,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4506,4519] [2021-11-20 05:41:46,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4566,4579] [2021-11-20 05:41:46,974 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,974 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,974 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,975 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,975 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,986 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,993 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,994 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,997 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,997 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:46,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 05:41:47,049 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 05:41:47,049 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 05:41:47,050 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 05:41:47,051 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 05:41:47,052 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 05:41:47,052 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 05:41:47,053 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 05:41:47,053 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 05:41:47,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 05:41:47,074 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 05:41:47,089 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,089 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,124 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,124 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,125 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,125 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,126 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,126 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,126 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,127 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,127 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,129 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,131 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,133 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,134 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,141 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 05:41:47,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:41:47,384 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:41:47,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47 WrapperNode [2021-11-20 05:41:47,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:41:47,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:41:47,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:41:47,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:41:47,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,636 INFO L137 Inliner]: procedures = 697, calls = 1887, calls flagged for inlining = 60, calls inlined = 15, statements flattened = 919 [2021-11-20 05:41:47,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:41:47,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:41:47,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:41:47,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:41:47,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:41:47,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:41:47,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:41:47,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:41:47,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (1/1) ... [2021-11-20 05:41:47,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:41:47,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:47,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:41:47,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:41:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_either [2021-11-20 05:41:47,885 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_either [2021-11-20 05:41:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2021-11-20 05:41:47,885 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2021-11-20 05:41:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 05:41:47,885 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 05:41:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:41:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-20 05:41:47,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-20 05:41:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-20 05:41:47,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-20 05:41:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 05:41:47,887 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 05:41:47,887 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_up [2021-11-20 05:41:47,887 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_up [2021-11-20 05:41:47,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:41:47,888 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 05:41:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 05:41:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:41:47,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:41:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:41:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:41:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:41:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure my_abort [2021-11-20 05:41:47,893 INFO L138 BoogieDeclarations]: Found implementation of procedure my_abort [2021-11-20 05:41:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-20 05:41:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-20 05:41:47,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:41:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:41:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 05:41:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 05:41:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 05:41:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 05:41:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-20 05:41:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-20 05:41:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-11-20 05:41:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-20 05:41:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:41:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-20 05:41:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:41:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:41:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2021-11-20 05:41:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2021-11-20 05:41:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 05:41:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 05:41:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 05:41:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 05:41:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:41:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-20 05:41:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-20 05:41:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2021-11-20 05:41:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2021-11-20 05:41:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 05:41:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 05:41:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:41:48,363 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:41:48,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:41:49,461 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:41:49,473 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:41:49,473 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 05:41:49,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:41:49 BoogieIcfgContainer [2021-11-20 05:41:49,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:41:49,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:41:49,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:41:49,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:41:49,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:41:44" (1/3) ... [2021-11-20 05:41:49,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a08568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:41:49, skipping insertion in model container [2021-11-20 05:41:49,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:41:47" (2/3) ... [2021-11-20 05:41:49,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a08568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:41:49, skipping insertion in model container [2021-11-20 05:41:49,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:41:49" (3/3) ... [2021-11-20 05:41:49,483 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_s_sift_either_harness.i [2021-11-20 05:41:49,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:41:49,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 05:41:49,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:41:49,545 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:41:49,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 05:41:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 358 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 221 states have internal predecessors, (276), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2021-11-20 05:41:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 05:41:49,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:49,587 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:49,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1703596242, now seen corresponding path program 1 times [2021-11-20 05:41:49,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:49,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677923548] [2021-11-20 05:41:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:49,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:41:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:41:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:41:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:41:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:41:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:41:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:41:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:41:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:41:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:41:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:41:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:41:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 05:41:50,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677923548] [2021-11-20 05:41:50,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677923548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:41:50,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:41:50,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:41:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045661514] [2021-11-20 05:41:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:41:50,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:41:50,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:41:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:41:50,702 INFO L87 Difference]: Start difference. First operand has 358 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 221 states have internal predecessors, (276), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 05:41:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:52,091 INFO L93 Difference]: Finished difference Result 821 states and 1341 transitions. [2021-11-20 05:41:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:41:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 103 [2021-11-20 05:41:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:52,114 INFO L225 Difference]: With dead ends: 821 [2021-11-20 05:41:52,115 INFO L226 Difference]: Without dead ends: 469 [2021-11-20 05:41:52,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:41:52,128 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 267 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 627 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:41:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-20 05:41:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 351. [2021-11-20 05:41:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 215 states have internal predecessors, (262), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-20 05:41:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 486 transitions. [2021-11-20 05:41:52,224 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 486 transitions. Word has length 103 [2021-11-20 05:41:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:52,225 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 486 transitions. [2021-11-20 05:41:52,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 05:41:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 486 transitions. [2021-11-20 05:41:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 05:41:52,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:52,256 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:52,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:41:52,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1175202252, now seen corresponding path program 1 times [2021-11-20 05:41:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:52,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21372212] [2021-11-20 05:41:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:52,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:41:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:41:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:41:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:41:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:41:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:41:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:41:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:41:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:41:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:41:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:41:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:41:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 05:41:52,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:52,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21372212] [2021-11-20 05:41:52,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21372212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:52,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799448478] [2021-11-20 05:41:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:52,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:52,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:52,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:41:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:41:53,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 05:41:53,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:41:53,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799448478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:41:53,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:41:53,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 05:41:53,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982507630] [2021-11-20 05:41:53,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:41:53,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:41:53,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:41:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:41:53,423 INFO L87 Difference]: Start difference. First operand 351 states and 486 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 05:41:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:53,454 INFO L93 Difference]: Finished difference Result 437 states and 596 transitions. [2021-11-20 05:41:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:41:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 103 [2021-11-20 05:41:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:53,459 INFO L225 Difference]: With dead ends: 437 [2021-11-20 05:41:53,460 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 05:41:53,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:41:53,462 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 0 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:53,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 965 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:41:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 05:41:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-20 05:41:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 214 states have (on average 1.2289719626168225) internal successors, (263), 216 states have internal predecessors, (263), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-20 05:41:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2021-11-20 05:41:53,508 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 103 [2021-11-20 05:41:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:53,511 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2021-11-20 05:41:53,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 05:41:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2021-11-20 05:41:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 05:41:53,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:53,523 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 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] [2021-11-20 05:41:53,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:53,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:53,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -99696786, now seen corresponding path program 1 times [2021-11-20 05:41:53,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:53,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954766040] [2021-11-20 05:41:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:53,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:53,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:41:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:53,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:41:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:53,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:41:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:41:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:41:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:41:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:41:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 05:41:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 05:41:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 05:41:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 05:41:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 05:41:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 05:41:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 05:41:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 05:41:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 05:41:54,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954766040] [2021-11-20 05:41:54,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954766040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:54,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481781010] [2021-11-20 05:41:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:54,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:54,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:54,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:41:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:41:54,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 05:41:55,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:41:55,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481781010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:41:55,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:41:55,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-20 05:41:55,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739464830] [2021-11-20 05:41:55,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:41:55,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:41:55,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:41:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:41:55,119 INFO L87 Difference]: Start difference. First operand 352 states and 487 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 05:41:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:55,379 INFO L93 Difference]: Finished difference Result 670 states and 938 transitions. [2021-11-20 05:41:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:41:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 124 [2021-11-20 05:41:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:55,384 INFO L225 Difference]: With dead ends: 670 [2021-11-20 05:41:55,384 INFO L226 Difference]: Without dead ends: 354 [2021-11-20 05:41:55,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:41:55,388 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 504 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:55,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1717 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:41:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-20 05:41:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2021-11-20 05:41:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 215 states have (on average 1.2279069767441861) internal successors, (264), 218 states have internal predecessors, (264), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (119), 111 states have call predecessors, (119), 111 states have call successors, (119) [2021-11-20 05:41:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 496 transitions. [2021-11-20 05:41:55,420 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 496 transitions. Word has length 124 [2021-11-20 05:41:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:55,421 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 496 transitions. [2021-11-20 05:41:55,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 05:41:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 496 transitions. [2021-11-20 05:41:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 05:41:55,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:55,424 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:55,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:55,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:55,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2138740587, now seen corresponding path program 1 times [2021-11-20 05:41:55,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:55,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367744184] [2021-11-20 05:41:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:55,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:41:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:41:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:41:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:41:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:41:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:41:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:41:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:41:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:41:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 05:41:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 05:41:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 05:41:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 05:41:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 05:41:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 05:41:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 05:41:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 05:41:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 05:41:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 05:41:56,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367744184] [2021-11-20 05:41:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367744184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20582232] [2021-11-20 05:41:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:56,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:56,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:56,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:56,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:41:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 2271 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:41:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 05:41:57,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:41:57,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20582232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:41:57,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:41:57,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-20 05:41:57,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292908869] [2021-11-20 05:41:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:41:57,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:41:57,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:41:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:41:57,076 INFO L87 Difference]: Start difference. First operand 354 states and 496 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 05:41:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:57,421 INFO L93 Difference]: Finished difference Result 693 states and 993 transitions. [2021-11-20 05:41:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:41:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 132 [2021-11-20 05:41:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:57,428 INFO L225 Difference]: With dead ends: 693 [2021-11-20 05:41:57,429 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 05:41:57,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:41:57,433 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 96 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:57,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2601 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:41:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 05:41:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2021-11-20 05:41:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 231 states have (on average 1.2380952380952381) internal successors, (286), 234 states have internal predecessors, (286), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2021-11-20 05:41:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 533 transitions. [2021-11-20 05:41:57,490 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 533 transitions. Word has length 132 [2021-11-20 05:41:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 533 transitions. [2021-11-20 05:41:57,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 05:41:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 533 transitions. [2021-11-20 05:41:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 05:41:57,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:57,495 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:57,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:57,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 05:41:57,720 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1048395964, now seen corresponding path program 1 times [2021-11-20 05:41:57,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:57,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919325755] [2021-11-20 05:41:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:57,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:57,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:41:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767864051] [2021-11-20 05:41:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:57,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:57,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:57,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:41:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:41:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 05:41:58,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:41:58,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919325755] [2021-11-20 05:41:58,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:41:58,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767864051] [2021-11-20 05:41:58,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767864051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:41:58,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:41:58,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:41:58,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207255815] [2021-11-20 05:41:58,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:41:58,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:41:58,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:41:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:41:58,625 INFO L87 Difference]: Start difference. First operand 373 states and 533 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 05:41:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:58,958 INFO L93 Difference]: Finished difference Result 718 states and 1050 transitions. [2021-11-20 05:41:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:41:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 147 [2021-11-20 05:41:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:58,965 INFO L225 Difference]: With dead ends: 718 [2021-11-20 05:41:58,965 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 05:41:58,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:41:58,969 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 528 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:58,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 2112 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:41:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 05:41:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2021-11-20 05:41:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 231 states have (on average 1.2380952380952381) internal successors, (286), 234 states have internal predecessors, (286), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2021-11-20 05:41:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 533 transitions. [2021-11-20 05:41:59,005 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 533 transitions. Word has length 147 [2021-11-20 05:41:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:59,006 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 533 transitions. [2021-11-20 05:41:59,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 05:41:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 533 transitions. [2021-11-20 05:41:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 05:41:59,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:59,010 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:59,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:59,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:59,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:41:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1514523470, now seen corresponding path program 1 times [2021-11-20 05:41:59,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639161439] [2021-11-20 05:41:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:59,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:59,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:41:59,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865550353] [2021-11-20 05:41:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:59,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:59,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:59,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:41:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:59,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2462 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:41:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:42:00,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:00,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:00,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639161439] [2021-11-20 05:42:00,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865550353] [2021-11-20 05:42:00,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865550353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:00,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:00,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:42:00,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83798768] [2021-11-20 05:42:00,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:00,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:42:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:42:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:42:00,146 INFO L87 Difference]: Start difference. First operand 373 states and 533 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 05:42:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:00,601 INFO L93 Difference]: Finished difference Result 744 states and 1088 transitions. [2021-11-20 05:42:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:42:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 163 [2021-11-20 05:42:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:00,610 INFO L225 Difference]: With dead ends: 744 [2021-11-20 05:42:00,610 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 05:42:00,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:42:00,617 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 117 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:00,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2993 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 05:42:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 373. [2021-11-20 05:42:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 231 states have (on average 1.2380952380952381) internal successors, (286), 234 states have internal predecessors, (286), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2021-11-20 05:42:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 533 transitions. [2021-11-20 05:42:00,693 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 533 transitions. Word has length 163 [2021-11-20 05:42:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:00,700 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 533 transitions. [2021-11-20 05:42:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 05:42:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 533 transitions. [2021-11-20 05:42:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 05:42:00,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:00,706 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:00,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:00,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:00,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1136730081, now seen corresponding path program 1 times [2021-11-20 05:42:00,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260349757] [2021-11-20 05:42:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:00,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:00,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588717596] [2021-11-20 05:42:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:00,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:00,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:00,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:42:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:42:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 05:42:01,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:01,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260349757] [2021-11-20 05:42:01,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588717596] [2021-11-20 05:42:01,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588717596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:01,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:01,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:42:01,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35852561] [2021-11-20 05:42:01,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:01,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:42:01,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:42:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:42:01,891 INFO L87 Difference]: Start difference. First operand 373 states and 533 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 05:42:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:02,344 INFO L93 Difference]: Finished difference Result 683 states and 991 transitions. [2021-11-20 05:42:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:42:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 178 [2021-11-20 05:42:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:02,349 INFO L225 Difference]: With dead ends: 683 [2021-11-20 05:42:02,349 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 05:42:02,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:42:02,353 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 545 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:02,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 2448 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:42:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 05:42:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-11-20 05:42:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 232 states have (on average 1.2370689655172413) internal successors, (287), 236 states have internal predecessors, (287), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (138), 114 states have call predecessors, (138), 113 states have call successors, (138) [2021-11-20 05:42:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 540 transitions. [2021-11-20 05:42:02,388 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 540 transitions. Word has length 178 [2021-11-20 05:42:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:02,389 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 540 transitions. [2021-11-20 05:42:02,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 05:42:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 540 transitions. [2021-11-20 05:42:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-20 05:42:02,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:02,393 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:02,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:02,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:02,608 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1083469799, now seen corresponding path program 1 times [2021-11-20 05:42:02,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:02,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808320150] [2021-11-20 05:42:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:02,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:02,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:02,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340777617] [2021-11-20 05:42:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:02,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:02,678 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:02,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:42:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-20 05:42:03,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:03,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:03,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808320150] [2021-11-20 05:42:03,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:03,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340777617] [2021-11-20 05:42:03,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340777617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:03,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 05:42:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689639003] [2021-11-20 05:42:03,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:42:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:42:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:42:03,689 INFO L87 Difference]: Start difference. First operand 375 states and 540 transitions. Second operand has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-20 05:42:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:04,228 INFO L93 Difference]: Finished difference Result 688 states and 1006 transitions. [2021-11-20 05:42:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:42:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) Word has length 201 [2021-11-20 05:42:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:04,233 INFO L225 Difference]: With dead ends: 688 [2021-11-20 05:42:04,234 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 05:42:04,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:42:04,237 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 569 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2814 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 05:42:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-11-20 05:42:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 233 states have (on average 1.2360515021459229) internal successors, (288), 237 states have internal predecessors, (288), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (138), 114 states have call predecessors, (138), 113 states have call successors, (138) [2021-11-20 05:42:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 541 transitions. [2021-11-20 05:42:04,268 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 541 transitions. Word has length 201 [2021-11-20 05:42:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:04,269 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 541 transitions. [2021-11-20 05:42:04,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-20 05:42:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 541 transitions. [2021-11-20 05:42:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:42:04,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:04,275 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:04,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:04,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:04,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2112387732, now seen corresponding path program 2 times [2021-11-20 05:42:04,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:04,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018336827] [2021-11-20 05:42:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:04,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:04,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:04,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410562258] [2021-11-20 05:42:04,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:04,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:04,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:04,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:04,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:42:05,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:42:05,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2941 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-20 05:42:06,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018336827] [2021-11-20 05:42:06,141 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:06,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410562258] [2021-11-20 05:42:06,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410562258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:06,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:06,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 05:42:06,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570492657] [2021-11-20 05:42:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:42:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:42:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:42:06,146 INFO L87 Difference]: Start difference. First operand 376 states and 541 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 05:42:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:06,689 INFO L93 Difference]: Finished difference Result 680 states and 990 transitions. [2021-11-20 05:42:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:42:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 232 [2021-11-20 05:42:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:06,694 INFO L225 Difference]: With dead ends: 680 [2021-11-20 05:42:06,694 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 05:42:06,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:42:06,699 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 585 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:06,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 3171 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 05:42:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-20 05:42:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 234 states have (on average 1.235042735042735) internal successors, (289), 239 states have internal predecessors, (289), 115 states have call successors, (115), 24 states have call predecessors, (115), 27 states have return successors, (142), 114 states have call predecessors, (142), 113 states have call successors, (142) [2021-11-20 05:42:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 546 transitions. [2021-11-20 05:42:06,733 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 546 transitions. Word has length 232 [2021-11-20 05:42:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:06,733 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 546 transitions. [2021-11-20 05:42:06,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 05:42:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 546 transitions. [2021-11-20 05:42:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-20 05:42:06,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:06,739 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:06,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:06,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -352400544, now seen corresponding path program 1 times [2021-11-20 05:42:06,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962666339] [2021-11-20 05:42:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:06,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:07,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13630374] [2021-11-20 05:42:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:07,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:07,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:07,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:07,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:42:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2803 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:42:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 169 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-20 05:42:08,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-20 05:42:08,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962666339] [2021-11-20 05:42:08,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13630374] [2021-11-20 05:42:08,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13630374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:08,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-20 05:42:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532979479] [2021-11-20 05:42:08,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:08,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:42:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:42:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:42:08,754 INFO L87 Difference]: Start difference. First operand 378 states and 546 transitions. Second operand has 14 states, 12 states have (on average 9.75) internal successors, (117), 12 states have internal predecessors, (117), 9 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (40), 5 states have call predecessors, (40), 9 states have call successors, (40) [2021-11-20 05:42:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:09,216 INFO L93 Difference]: Finished difference Result 710 states and 1045 transitions. [2021-11-20 05:42:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:42:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 9.75) internal successors, (117), 12 states have internal predecessors, (117), 9 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (40), 5 states have call predecessors, (40), 9 states have call successors, (40) Word has length 218 [2021-11-20 05:42:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:09,221 INFO L225 Difference]: With dead ends: 710 [2021-11-20 05:42:09,222 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 05:42:09,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:42:09,225 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 174 mSDsluCounter, 3902 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:09,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 4367 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 05:42:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 391. [2021-11-20 05:42:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 246 states have (on average 1.2439024390243902) internal successors, (306), 250 states have internal predecessors, (306), 116 states have call successors, (116), 24 states have call predecessors, (116), 27 states have return successors, (143), 116 states have call predecessors, (143), 114 states have call successors, (143) [2021-11-20 05:42:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 565 transitions. [2021-11-20 05:42:09,257 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 565 transitions. Word has length 218 [2021-11-20 05:42:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:09,258 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 565 transitions. [2021-11-20 05:42:09,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 9.75) internal successors, (117), 12 states have internal predecessors, (117), 9 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (40), 5 states have call predecessors, (40), 9 states have call successors, (40) [2021-11-20 05:42:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 565 transitions. [2021-11-20 05:42:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 05:42:09,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:09,265 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:09,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:09,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:42:09,492 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 688347363, now seen corresponding path program 2 times [2021-11-20 05:42:09,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:09,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656577332] [2021-11-20 05:42:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:09,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:09,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:09,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665535060] [2021-11-20 05:42:09,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:09,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:09,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:09,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:42:10,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:42:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2003 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:42:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-11-20 05:42:10,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:10,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656577332] [2021-11-20 05:42:10,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665535060] [2021-11-20 05:42:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665535060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:10,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:10,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:42:10,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198697453] [2021-11-20 05:42:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:10,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:10,514 INFO L87 Difference]: Start difference. First operand 391 states and 565 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 05:42:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:10,647 INFO L93 Difference]: Finished difference Result 708 states and 1039 transitions. [2021-11-20 05:42:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 263 [2021-11-20 05:42:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:10,652 INFO L225 Difference]: With dead ends: 708 [2021-11-20 05:42:10,653 INFO L226 Difference]: Without dead ends: 391 [2021-11-20 05:42:10,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:10,656 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 64 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1345 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:42:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-20 05:42:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2021-11-20 05:42:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 246 states have (on average 1.2357723577235773) internal successors, (304), 250 states have internal predecessors, (304), 116 states have call successors, (116), 24 states have call predecessors, (116), 27 states have return successors, (143), 116 states have call predecessors, (143), 114 states have call successors, (143) [2021-11-20 05:42:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 563 transitions. [2021-11-20 05:42:10,689 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 563 transitions. Word has length 263 [2021-11-20 05:42:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:10,690 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 563 transitions. [2021-11-20 05:42:10,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 05:42:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 563 transitions. [2021-11-20 05:42:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-20 05:42:10,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:10,694 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:10,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:10,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:10,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1679261457, now seen corresponding path program 1 times [2021-11-20 05:42:10,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:10,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102204418] [2021-11-20 05:42:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:10,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:10,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:10,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834328539] [2021-11-20 05:42:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:10,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:11,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:42:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2873 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:42:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 05:42:12,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:12,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102204418] [2021-11-20 05:42:12,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834328539] [2021-11-20 05:42:12,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834328539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:12,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:12,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 05:42:12,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758127051] [2021-11-20 05:42:12,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:12,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:42:12,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:42:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:42:12,023 INFO L87 Difference]: Start difference. First operand 391 states and 563 transitions. Second operand has 10 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 05:42:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:12,506 INFO L93 Difference]: Finished difference Result 733 states and 1069 transitions. [2021-11-20 05:42:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:42:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) Word has length 233 [2021-11-20 05:42:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:12,515 INFO L225 Difference]: With dead ends: 733 [2021-11-20 05:42:12,515 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 05:42:12,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:42:12,523 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 178 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 3753 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:12,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 3753 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 05:42:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 375. [2021-11-20 05:42:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 232 states have (on average 1.228448275862069) internal successors, (285), 236 states have internal predecessors, (285), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (134), 114 states have call predecessors, (134), 113 states have call successors, (134) [2021-11-20 05:42:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 534 transitions. [2021-11-20 05:42:12,553 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 534 transitions. Word has length 233 [2021-11-20 05:42:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:12,554 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 534 transitions. [2021-11-20 05:42:12,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 05:42:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 534 transitions. [2021-11-20 05:42:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-20 05:42:12,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:12,557 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:12,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:12,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:12,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 473503328, now seen corresponding path program 2 times [2021-11-20 05:42:12,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:12,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491916145] [2021-11-20 05:42:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:12,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:12,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930334338] [2021-11-20 05:42:12,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:12,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:12,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:12,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:42:13,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:42:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-20 05:42:14,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:14,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491916145] [2021-11-20 05:42:14,223 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930334338] [2021-11-20 05:42:14,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930334338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:14,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:14,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 05:42:14,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929282052] [2021-11-20 05:42:14,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:14,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:42:14,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:42:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:42:14,226 INFO L87 Difference]: Start difference. First operand 375 states and 534 transitions. Second operand has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 05:42:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:14,663 INFO L93 Difference]: Finished difference Result 645 states and 922 transitions. [2021-11-20 05:42:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:42:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) Word has length 248 [2021-11-20 05:42:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:14,668 INFO L225 Difference]: With dead ends: 645 [2021-11-20 05:42:14,668 INFO L226 Difference]: Without dead ends: 380 [2021-11-20 05:42:14,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:42:14,671 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 565 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 2857 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:42:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-20 05:42:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 375. [2021-11-20 05:42:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 232 states have (on average 1.228448275862069) internal successors, (285), 236 states have internal predecessors, (285), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2021-11-20 05:42:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 532 transitions. [2021-11-20 05:42:14,697 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 532 transitions. Word has length 248 [2021-11-20 05:42:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:14,698 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 532 transitions. [2021-11-20 05:42:14,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 5 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 05:42:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 532 transitions. [2021-11-20 05:42:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-20 05:42:14,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:14,701 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:14,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:14,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:42:14,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -817196209, now seen corresponding path program 1 times [2021-11-20 05:42:14,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768766125] [2021-11-20 05:42:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:14,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:14,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:14,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157545221] [2021-11-20 05:42:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:14,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:14,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:15,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:42:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:42:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 210 proven. 3 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-11-20 05:42:16,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-20 05:42:16,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768766125] [2021-11-20 05:42:16,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157545221] [2021-11-20 05:42:16,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157545221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:16,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:16,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-20 05:42:16,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695606595] [2021-11-20 05:42:16,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:16,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:42:16,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:16,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:42:16,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:42:16,913 INFO L87 Difference]: Start difference. First operand 375 states and 532 transitions. Second operand has 16 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 11 states have call successors, (49), 4 states have call predecessors, (49), 4 states have return successors, (45), 7 states have call predecessors, (45), 11 states have call successors, (45) [2021-11-20 05:42:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:17,396 INFO L93 Difference]: Finished difference Result 661 states and 946 transitions. [2021-11-20 05:42:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:42:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 11 states have call successors, (49), 4 states have call predecessors, (49), 4 states have return successors, (45), 7 states have call predecessors, (45), 11 states have call successors, (45) Word has length 272 [2021-11-20 05:42:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:17,407 INFO L225 Difference]: With dead ends: 661 [2021-11-20 05:42:17,407 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 05:42:17,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:42:17,410 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 209 mSDsluCounter, 4297 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 4764 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:17,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 4764 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 05:42:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 391. [2021-11-20 05:42:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 246 states have (on average 1.2357723577235773) internal successors, (304), 250 states have internal predecessors, (304), 116 states have call successors, (116), 24 states have call predecessors, (116), 27 states have return successors, (137), 116 states have call predecessors, (137), 114 states have call successors, (137) [2021-11-20 05:42:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 557 transitions. [2021-11-20 05:42:17,449 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 557 transitions. Word has length 272 [2021-11-20 05:42:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 557 transitions. [2021-11-20 05:42:17,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 11 states have call successors, (49), 4 states have call predecessors, (49), 4 states have return successors, (45), 7 states have call predecessors, (45), 11 states have call successors, (45) [2021-11-20 05:42:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 557 transitions. [2021-11-20 05:42:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-20 05:42:17,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:17,454 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:17,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:42:17,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash 451085598, now seen corresponding path program 2 times [2021-11-20 05:42:17,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:17,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95349569] [2021-11-20 05:42:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:17,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:17,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:17,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502558544] [2021-11-20 05:42:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:17,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:17,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:17,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:42:18,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:42:18,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 3233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:42:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-20 05:42:19,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:19,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95349569] [2021-11-20 05:42:19,130 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502558544] [2021-11-20 05:42:19,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502558544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:19,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:19,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 05:42:19,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965876460] [2021-11-20 05:42:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:19,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:42:19,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:42:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:42:19,132 INFO L87 Difference]: Start difference. First operand 391 states and 557 transitions. Second operand has 11 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 7 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-20 05:42:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:19,628 INFO L93 Difference]: Finished difference Result 693 states and 992 transitions. [2021-11-20 05:42:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:42:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 7 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) Word has length 287 [2021-11-20 05:42:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:19,633 INFO L225 Difference]: With dead ends: 693 [2021-11-20 05:42:19,634 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 05:42:19,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:42:19,640 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 199 mSDsluCounter, 3736 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:19,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 4179 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 05:42:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 375. [2021-11-20 05:42:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 232 states have (on average 1.228448275862069) internal successors, (285), 236 states have internal predecessors, (285), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (130), 114 states have call predecessors, (130), 113 states have call successors, (130) [2021-11-20 05:42:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 530 transitions. [2021-11-20 05:42:19,677 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 530 transitions. Word has length 287 [2021-11-20 05:42:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 530 transitions. [2021-11-20 05:42:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 7 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-20 05:42:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 530 transitions. [2021-11-20 05:42:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-20 05:42:19,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:19,681 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:19,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:42:19,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1306212493, now seen corresponding path program 3 times [2021-11-20 05:42:19,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:19,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45157167] [2021-11-20 05:42:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:19,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:19,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239273362] [2021-11-20 05:42:19,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:42:19,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:19,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:19,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:19,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:42:20,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:42:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:20,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-20 05:42:21,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:21,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45157167] [2021-11-20 05:42:21,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239273362] [2021-11-20 05:42:21,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239273362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:21,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:21,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:42:21,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965483920] [2021-11-20 05:42:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:21,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:42:21,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:42:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:21,114 INFO L87 Difference]: Start difference. First operand 375 states and 530 transitions. Second operand has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 05:42:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:21,362 INFO L93 Difference]: Finished difference Result 669 states and 964 transitions. [2021-11-20 05:42:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:42:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 302 [2021-11-20 05:42:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:21,367 INFO L225 Difference]: With dead ends: 669 [2021-11-20 05:42:21,367 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 05:42:21,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:42:21,370 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 2 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:21,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2210 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:42:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 05:42:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-11-20 05:42:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 232 states have (on average 1.228448275862069) internal successors, (285), 236 states have internal predecessors, (285), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (129), 114 states have call predecessors, (129), 113 states have call successors, (129) [2021-11-20 05:42:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 529 transitions. [2021-11-20 05:42:21,401 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 529 transitions. Word has length 302 [2021-11-20 05:42:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:21,401 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 529 transitions. [2021-11-20 05:42:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 05:42:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 529 transitions. [2021-11-20 05:42:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-20 05:42:21,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:21,405 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 05:42:21,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:21,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:42:21,632 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash -212707722, now seen corresponding path program 1 times [2021-11-20 05:42:21,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353302386] [2021-11-20 05:42:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:21,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:21,718 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238981628] [2021-11-20 05:42:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:21,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:21,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:21,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:21,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:42:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:42:22,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-20 05:42:22,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 50 proven. 28 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-20 05:42:23,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353302386] [2021-11-20 05:42:23,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238981628] [2021-11-20 05:42:23,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238981628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:23,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:23,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-20 05:42:23,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123617122] [2021-11-20 05:42:23,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:23,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:42:23,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:42:23,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:42:23,474 INFO L87 Difference]: Start difference. First operand 375 states and 529 transitions. Second operand has 18 states, 16 states have (on average 8.1875) internal successors, (131), 14 states have internal predecessors, (131), 11 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (41), 7 states have call predecessors, (41), 11 states have call successors, (41) [2021-11-20 05:42:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:24,078 INFO L93 Difference]: Finished difference Result 692 states and 986 transitions. [2021-11-20 05:42:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:42:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 8.1875) internal successors, (131), 14 states have internal predecessors, (131), 11 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (41), 7 states have call predecessors, (41), 11 states have call successors, (41) Word has length 280 [2021-11-20 05:42:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:24,083 INFO L225 Difference]: With dead ends: 692 [2021-11-20 05:42:24,084 INFO L226 Difference]: Without dead ends: 391 [2021-11-20 05:42:24,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:42:24,087 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 229 mSDsluCounter, 6200 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:24,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 6644 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:42:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-20 05:42:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-20 05:42:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 245 states have (on average 1.236734693877551) internal successors, (303), 248 states have internal predecessors, (303), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (130), 116 states have call predecessors, (130), 114 states have call successors, (130) [2021-11-20 05:42:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 549 transitions. [2021-11-20 05:42:24,142 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 549 transitions. Word has length 280 [2021-11-20 05:42:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 549 transitions. [2021-11-20 05:42:24,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 8.1875) internal successors, (131), 14 states have internal predecessors, (131), 11 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (41), 7 states have call predecessors, (41), 11 states have call successors, (41) [2021-11-20 05:42:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 549 transitions. [2021-11-20 05:42:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-20 05:42:24,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:24,146 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 05:42:24,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:24,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:42:24,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2012161964, now seen corresponding path program 2 times [2021-11-20 05:42:24,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370889266] [2021-11-20 05:42:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:24,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:24,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286576380] [2021-11-20 05:42:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:24,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:24,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:24,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:42:24,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:42:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:24,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-20 05:42:25,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:25,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370889266] [2021-11-20 05:42:25,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286576380] [2021-11-20 05:42:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286576380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:25,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:42:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015914879] [2021-11-20 05:42:25,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:25,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:42:25,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:42:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:25,510 INFO L87 Difference]: Start difference. First operand 389 states and 549 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 05:42:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:25,920 INFO L93 Difference]: Finished difference Result 796 states and 1156 transitions. [2021-11-20 05:42:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:42:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 310 [2021-11-20 05:42:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:25,926 INFO L225 Difference]: With dead ends: 796 [2021-11-20 05:42:25,926 INFO L226 Difference]: Without dead ends: 443 [2021-11-20 05:42:25,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:42:25,932 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 21 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2249 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:42:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-11-20 05:42:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 401. [2021-11-20 05:42:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 257 states have (on average 1.2373540856031129) internal successors, (318), 260 states have internal predecessors, (318), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (130), 116 states have call predecessors, (130), 114 states have call successors, (130) [2021-11-20 05:42:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 564 transitions. [2021-11-20 05:42:25,959 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 564 transitions. Word has length 310 [2021-11-20 05:42:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:25,960 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 564 transitions. [2021-11-20 05:42:25,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 05:42:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 564 transitions. [2021-11-20 05:42:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-20 05:42:25,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:25,964 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 05:42:26,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:26,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:42:26,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:26,181 INFO L85 PathProgramCache]: Analyzing trace with hash 92083096, now seen corresponding path program 1 times [2021-11-20 05:42:26,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:26,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796954188] [2021-11-20 05:42:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:26,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:26,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:26,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150977133] [2021-11-20 05:42:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:26,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:26,225 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:26,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:42:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3411 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:42:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-11-20 05:42:27,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:27,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796954188] [2021-11-20 05:42:27,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150977133] [2021-11-20 05:42:27,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150977133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:27,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:27,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:42:27,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124598975] [2021-11-20 05:42:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:27,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:42:27,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:42:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:42:27,440 INFO L87 Difference]: Start difference. First operand 401 states and 564 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 05:42:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:27,503 INFO L93 Difference]: Finished difference Result 778 states and 1116 transitions. [2021-11-20 05:42:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 310 [2021-11-20 05:42:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:27,508 INFO L225 Difference]: With dead ends: 778 [2021-11-20 05:42:27,508 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 05:42:27,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:27,512 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 3 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:27,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1441 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:42:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 05:42:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 407. [2021-11-20 05:42:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 263 states have (on average 1.231939163498099) internal successors, (324), 266 states have internal predecessors, (324), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (130), 116 states have call predecessors, (130), 114 states have call successors, (130) [2021-11-20 05:42:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 570 transitions. [2021-11-20 05:42:27,538 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 570 transitions. Word has length 310 [2021-11-20 05:42:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:27,538 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 570 transitions. [2021-11-20 05:42:27,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 05:42:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 570 transitions. [2021-11-20 05:42:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-20 05:42:27,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:27,542 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 05:42:27,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:27,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:27,764 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -641737782, now seen corresponding path program 1 times [2021-11-20 05:42:27,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:27,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255845968] [2021-11-20 05:42:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:27,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:27,820 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660879893] [2021-11-20 05:42:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:27,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:27,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:27,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:42:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:42:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-11-20 05:42:29,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:29,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255845968] [2021-11-20 05:42:29,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:29,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660879893] [2021-11-20 05:42:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660879893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:29,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:29,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:42:29,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626981955] [2021-11-20 05:42:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:29,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:42:29,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:42:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:29,012 INFO L87 Difference]: Start difference. First operand 407 states and 570 transitions. Second operand has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 05:42:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:29,181 INFO L93 Difference]: Finished difference Result 754 states and 1067 transitions. [2021-11-20 05:42:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:42:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 340 [2021-11-20 05:42:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:29,186 INFO L225 Difference]: With dead ends: 754 [2021-11-20 05:42:29,187 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 05:42:29,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:42:29,190 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 82 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:29,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2532 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:42:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 05:42:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 410. [2021-11-20 05:42:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 266 states have (on average 1.2293233082706767) internal successors, (327), 269 states have internal predecessors, (327), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (130), 116 states have call predecessors, (130), 114 states have call successors, (130) [2021-11-20 05:42:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 573 transitions. [2021-11-20 05:42:29,232 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 573 transitions. Word has length 340 [2021-11-20 05:42:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:29,233 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 573 transitions. [2021-11-20 05:42:29,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 4 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 05:42:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 573 transitions. [2021-11-20 05:42:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-20 05:42:29,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:29,237 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:29,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:29,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:29,464 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash 828564891, now seen corresponding path program 1 times [2021-11-20 05:42:29,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742939487] [2021-11-20 05:42:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:29,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:29,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457621166] [2021-11-20 05:42:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:29,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:29,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:29,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:42:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 3570 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:42:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-11-20 05:42:30,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:30,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742939487] [2021-11-20 05:42:30,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457621166] [2021-11-20 05:42:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457621166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:30,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:30,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 05:42:30,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095420452] [2021-11-20 05:42:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:30,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:42:30,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:42:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:42:30,738 INFO L87 Difference]: Start difference. First operand 410 states and 573 transitions. Second operand has 11 states, 10 states have (on average 9.5) internal successors, (95), 8 states have internal predecessors, (95), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 05:42:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:31,145 INFO L93 Difference]: Finished difference Result 755 states and 1068 transitions. [2021-11-20 05:42:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:42:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 9.5) internal successors, (95), 8 states have internal predecessors, (95), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) Word has length 339 [2021-11-20 05:42:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:31,150 INFO L225 Difference]: With dead ends: 755 [2021-11-20 05:42:31,150 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 05:42:31,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:42:31,153 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 160 mSDsluCounter, 3861 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 4317 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:31,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 4317 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:42:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 05:42:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2021-11-20 05:42:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 273 states have (on average 1.2271062271062272) internal successors, (335), 276 states have internal predecessors, (335), 125 states have call successors, (125), 25 states have call predecessors, (125), 27 states have return successors, (139), 125 states have call predecessors, (139), 123 states have call successors, (139) [2021-11-20 05:42:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 599 transitions. [2021-11-20 05:42:31,182 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 599 transitions. Word has length 339 [2021-11-20 05:42:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 599 transitions. [2021-11-20 05:42:31,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 9.5) internal successors, (95), 8 states have internal predecessors, (95), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 05:42:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 599 transitions. [2021-11-20 05:42:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-20 05:42:31,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:31,187 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:31,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:31,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:31,400 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash 599052898, now seen corresponding path program 1 times [2021-11-20 05:42:31,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742963828] [2021-11-20 05:42:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:31,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:31,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142163449] [2021-11-20 05:42:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:31,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:31,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:31,454 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:31,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:42:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 3447 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:42:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2021-11-20 05:42:32,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:32,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742963828] [2021-11-20 05:42:32,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142163449] [2021-11-20 05:42:32,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142163449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:32,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:32,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 05:42:32,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109398142] [2021-11-20 05:42:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:32,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:42:32,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:42:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:42:32,578 INFO L87 Difference]: Start difference. First operand 427 states and 599 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 6 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 05:42:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:32,936 INFO L93 Difference]: Finished difference Result 736 states and 1036 transitions. [2021-11-20 05:42:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:42:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 6 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 317 [2021-11-20 05:42:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:32,942 INFO L225 Difference]: With dead ends: 736 [2021-11-20 05:42:32,942 INFO L226 Difference]: Without dead ends: 444 [2021-11-20 05:42:32,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:42:32,949 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 127 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3912 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:32,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3912 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:42:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-20 05:42:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 439. [2021-11-20 05:42:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 279 states have (on average 1.2258064516129032) internal successors, (342), 282 states have internal predecessors, (342), 130 states have call successors, (130), 26 states have call predecessors, (130), 28 states have return successors, (144), 130 states have call predecessors, (144), 128 states have call successors, (144) [2021-11-20 05:42:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 616 transitions. [2021-11-20 05:42:32,979 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 616 transitions. Word has length 317 [2021-11-20 05:42:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:32,980 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 616 transitions. [2021-11-20 05:42:32,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 8 states have internal predecessors, (72), 6 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-20 05:42:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 616 transitions. [2021-11-20 05:42:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-20 05:42:32,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:32,984 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:33,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:33,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:42:33,212 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2117085201, now seen corresponding path program 1 times [2021-11-20 05:42:33,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:33,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627322942] [2021-11-20 05:42:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:33,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:33,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:33,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070132053] [2021-11-20 05:42:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:33,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:33,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:33,262 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:33,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:42:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 3566 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 05:42:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:34,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-20 05:42:34,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-20 05:42:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-20 05:42:35,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:35,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627322942] [2021-11-20 05:42:35,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070132053] [2021-11-20 05:42:35,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070132053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:35,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:35,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 05:42:35,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129051374] [2021-11-20 05:42:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:35,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:42:35,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:42:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:42:35,299 INFO L87 Difference]: Start difference. First operand 439 states and 616 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-11-20 05:42:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:36,229 INFO L93 Difference]: Finished difference Result 900 states and 1286 transitions. [2021-11-20 05:42:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:42:36,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 332 [2021-11-20 05:42:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:36,236 INFO L225 Difference]: With dead ends: 900 [2021-11-20 05:42:36,236 INFO L226 Difference]: Without dead ends: 523 [2021-11-20 05:42:36,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:42:36,244 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 122 mSDsluCounter, 4305 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 4772 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:36,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 4772 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 605 Invalid, 0 Unknown, 88 Unchecked, 0.6s Time] [2021-11-20 05:42:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-20 05:42:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 460. [2021-11-20 05:42:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 296 states have (on average 1.222972972972973) internal successors, (362), 299 states have internal predecessors, (362), 132 states have call successors, (132), 27 states have call predecessors, (132), 30 states have return successors, (156), 133 states have call predecessors, (156), 130 states have call successors, (156) [2021-11-20 05:42:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 650 transitions. [2021-11-20 05:42:36,285 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 650 transitions. Word has length 332 [2021-11-20 05:42:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:36,286 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 650 transitions. [2021-11-20 05:42:36,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-11-20 05:42:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 650 transitions. [2021-11-20 05:42:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-20 05:42:36,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:36,290 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:36,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:36,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 05:42:36,504 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash -261224561, now seen corresponding path program 1 times [2021-11-20 05:42:36,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:36,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607428573] [2021-11-20 05:42:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:36,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:36,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:36,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192997126] [2021-11-20 05:42:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:36,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:36,559 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:36,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:42:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 3569 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 05:42:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-20 05:42:37,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:37,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607428573] [2021-11-20 05:42:37,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192997126] [2021-11-20 05:42:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192997126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:37,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:37,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:42:37,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349011522] [2021-11-20 05:42:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:37,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:37,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:37,671 INFO L87 Difference]: Start difference. First operand 460 states and 650 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:37,736 INFO L93 Difference]: Finished difference Result 909 states and 1318 transitions. [2021-11-20 05:42:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:42:37,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 332 [2021-11-20 05:42:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:37,741 INFO L225 Difference]: With dead ends: 909 [2021-11-20 05:42:37,742 INFO L226 Difference]: Without dead ends: 494 [2021-11-20 05:42:37,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:37,746 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 8 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:37,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1988 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:42:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-20 05:42:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 476. [2021-11-20 05:42:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 312 states have (on average 1.2211538461538463) internal successors, (381), 315 states have internal predecessors, (381), 132 states have call successors, (132), 27 states have call predecessors, (132), 30 states have return successors, (156), 133 states have call predecessors, (156), 130 states have call successors, (156) [2021-11-20 05:42:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 669 transitions. [2021-11-20 05:42:37,780 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 669 transitions. Word has length 332 [2021-11-20 05:42:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:37,781 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 669 transitions. [2021-11-20 05:42:37,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 669 transitions. [2021-11-20 05:42:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-20 05:42:37,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:37,785 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:37,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:38,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 05:42:38,008 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 742867776, now seen corresponding path program 1 times [2021-11-20 05:42:38,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:38,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32173834] [2021-11-20 05:42:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:38,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:38,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785089137] [2021-11-20 05:42:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:38,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:38,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:38,109 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:38,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:42:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 3568 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:42:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:39,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 05:42:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 05:42:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-20 05:42:39,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:39,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:39,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32173834] [2021-11-20 05:42:39,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785089137] [2021-11-20 05:42:39,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785089137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:39,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:39,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 05:42:39,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951117371] [2021-11-20 05:42:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:39,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:42:39,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:42:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:42:39,794 INFO L87 Difference]: Start difference. First operand 476 states and 669 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 7 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-20 05:42:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:40,883 INFO L93 Difference]: Finished difference Result 1006 states and 1440 transitions. [2021-11-20 05:42:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:42:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 7 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 334 [2021-11-20 05:42:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:40,890 INFO L225 Difference]: With dead ends: 1006 [2021-11-20 05:42:40,890 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 05:42:40,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:42:40,894 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 108 mSDsluCounter, 4779 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 5253 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:40,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 5253 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 873 Invalid, 0 Unknown, 91 Unchecked, 0.8s Time] [2021-11-20 05:42:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 05:42:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 524. [2021-11-20 05:42:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 353 states have (on average 1.2209631728045325) internal successors, (431), 357 states have internal predecessors, (431), 135 states have call successors, (135), 28 states have call predecessors, (135), 34 states have return successors, (194), 138 states have call predecessors, (194), 133 states have call successors, (194) [2021-11-20 05:42:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 760 transitions. [2021-11-20 05:42:40,938 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 760 transitions. Word has length 334 [2021-11-20 05:42:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:40,938 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 760 transitions. [2021-11-20 05:42:40,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 13 states have internal predecessors, (116), 7 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-20 05:42:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 760 transitions. [2021-11-20 05:42:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-20 05:42:40,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:40,943 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:40,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:41,160 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1209682178, now seen corresponding path program 1 times [2021-11-20 05:42:41,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:41,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705914852] [2021-11-20 05:42:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:41,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:41,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450617363] [2021-11-20 05:42:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:41,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:41,205 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:41,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:42:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:42:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-11-20 05:42:42,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705914852] [2021-11-20 05:42:42,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450617363] [2021-11-20 05:42:42,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450617363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:42,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:42,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:42:42,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604800863] [2021-11-20 05:42:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:42,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:42:42,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:42:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:42:42,317 INFO L87 Difference]: Start difference. First operand 524 states and 760 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:42,375 INFO L93 Difference]: Finished difference Result 1015 states and 1550 transitions. [2021-11-20 05:42:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 334 [2021-11-20 05:42:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:42,382 INFO L225 Difference]: With dead ends: 1015 [2021-11-20 05:42:42,382 INFO L226 Difference]: Without dead ends: 527 [2021-11-20 05:42:42,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:42,388 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 7 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:42,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1447 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:42:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-20 05:42:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 524. [2021-11-20 05:42:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 353 states have (on average 1.2181303116147308) internal successors, (430), 357 states have internal predecessors, (430), 135 states have call successors, (135), 28 states have call predecessors, (135), 34 states have return successors, (194), 138 states have call predecessors, (194), 133 states have call successors, (194) [2021-11-20 05:42:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 759 transitions. [2021-11-20 05:42:42,424 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 759 transitions. Word has length 334 [2021-11-20 05:42:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:42,424 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 759 transitions. [2021-11-20 05:42:42,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 759 transitions. [2021-11-20 05:42:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-20 05:42:42,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:42,428 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:42,643 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 379510714, now seen corresponding path program 1 times [2021-11-20 05:42:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013115530] [2021-11-20 05:42:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:42,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:42,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:42,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384511564] [2021-11-20 05:42:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:42,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:42,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:42,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 05:42:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 3573 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 05:42:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-11-20 05:42:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-20 05:42:44,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:44,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013115530] [2021-11-20 05:42:44,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384511564] [2021-11-20 05:42:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384511564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:44,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:44,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 05:42:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544125934] [2021-11-20 05:42:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:44,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:42:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:42:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:42:44,114 INFO L87 Difference]: Start difference. First operand 524 states and 759 transitions. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 6 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 05:42:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:45,027 INFO L93 Difference]: Finished difference Result 1036 states and 1564 transitions. [2021-11-20 05:42:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:42:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 6 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 336 [2021-11-20 05:42:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:45,033 INFO L225 Difference]: With dead ends: 1036 [2021-11-20 05:42:45,033 INFO L226 Difference]: Without dead ends: 548 [2021-11-20 05:42:45,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:42:45,039 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 102 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 4294 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:42:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-20 05:42:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 505. [2021-11-20 05:42:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 334 states have (on average 1.1976047904191616) internal successors, (400), 336 states have internal predecessors, (400), 135 states have call successors, (135), 28 states have call predecessors, (135), 34 states have return successors, (201), 140 states have call predecessors, (201), 133 states have call successors, (201) [2021-11-20 05:42:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 736 transitions. [2021-11-20 05:42:45,074 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 736 transitions. Word has length 336 [2021-11-20 05:42:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:45,075 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 736 transitions. [2021-11-20 05:42:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 6 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 05:42:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 736 transitions. [2021-11-20 05:42:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-20 05:42:45,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:45,079 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:45,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:45,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 05:42:45,304 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 476405880, now seen corresponding path program 1 times [2021-11-20 05:42:45,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:45,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753366799] [2021-11-20 05:42:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:45,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:45,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:45,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783932836] [2021-11-20 05:42:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:45,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:45,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:45,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:45,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 05:42:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 3568 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:42:45,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-20 05:42:46,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:42:46,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753366799] [2021-11-20 05:42:46,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:42:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783932836] [2021-11-20 05:42:46,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783932836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:46,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:46,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:42:46,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099303511] [2021-11-20 05:42:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:46,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:46,440 INFO L87 Difference]: Start difference. First operand 505 states and 736 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:46,712 INFO L93 Difference]: Finished difference Result 974 states and 1489 transitions. [2021-11-20 05:42:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:42:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 340 [2021-11-20 05:42:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:46,718 INFO L225 Difference]: With dead ends: 974 [2021-11-20 05:42:46,718 INFO L226 Difference]: Without dead ends: 505 [2021-11-20 05:42:46,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:42:46,724 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 7 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:46,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1860 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:42:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-20 05:42:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2021-11-20 05:42:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 334 states have (on average 1.1946107784431137) internal successors, (399), 336 states have internal predecessors, (399), 135 states have call successors, (135), 28 states have call predecessors, (135), 34 states have return successors, (201), 140 states have call predecessors, (201), 133 states have call successors, (201) [2021-11-20 05:42:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 735 transitions. [2021-11-20 05:42:46,759 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 735 transitions. Word has length 340 [2021-11-20 05:42:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:46,759 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 735 transitions. [2021-11-20 05:42:46,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 05:42:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 735 transitions. [2021-11-20 05:42:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-20 05:42:46,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:46,764 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:46,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:46,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:42:46,980 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:42:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1243371206, now seen corresponding path program 1 times [2021-11-20 05:42:46,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:46,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856169864] [2021-11-20 05:42:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:46,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:47,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:42:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024469357] [2021-11-20 05:42:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:47,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:47,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:47,021 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:47,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 05:42:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-20 05:42:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:47,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:42:48,505 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 05:42:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:42:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:48,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:42:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:42:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 05:43:34,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:43:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2021-11-20 05:43:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:43:34,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:43:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-20 05:43:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:43:34,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:43:34,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:43:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2021-11-20 05:43:34,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:43:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2021-11-20 05:43:36,951 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-20 05:43:46,855 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 05:44:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:44:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:44:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:44:04,654 INFO L354 Elim1Store]: treesize reduction 117, result has 0.8 percent of original size [2021-11-20 05:44:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 1 [2021-11-20 05:44:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 370 proven. 34 refuted. 1 times theorem prover too weak. 425 trivial. 3 not checked. [2021-11-20 05:44:05,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:14,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856169864] [2021-11-20 05:44:14,913 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:44:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024469357] [2021-11-20 05:44:14,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024469357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:14,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:44:14,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-11-20 05:44:14,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477642065] [2021-11-20 05:44:14,913 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:14,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:44:14,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:44:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2348, Unknown=23, NotChecked=198, Total=2756 [2021-11-20 05:44:14,916 INFO L87 Difference]: Start difference. First operand 505 states and 735 transitions. Second operand has 45 states, 40 states have (on average 3.425) internal successors, (137), 36 states have internal predecessors, (137), 14 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (32), 12 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-20 05:45:07,697 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|))) |c_#memory_$Pointer$.base|))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))))) is different from true [2021-11-20 05:45:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:17,839 INFO L93 Difference]: Finished difference Result 1141 states and 1705 transitions. [2021-11-20 05:45:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:45:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 3.425) internal successors, (137), 36 states have internal predecessors, (137), 14 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (32), 12 states have call predecessors, (32), 14 states have call successors, (32) Word has length 340 [2021-11-20 05:45:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:17,849 INFO L225 Difference]: With dead ends: 1141 [2021-11-20 05:45:17,849 INFO L226 Difference]: Without dead ends: 686 [2021-11-20 05:45:17,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 507 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 139.4s TimeCoverageRelationStatistics Valid=336, Invalid=4058, Unknown=40, NotChecked=396, Total=4830 [2021-11-20 05:45:17,856 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 524 mSDsluCounter, 4873 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 5336 SdHoareTripleChecker+Invalid, 10308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7520 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 5336 Invalid, 10308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2239 Invalid, 0 Unknown, 7520 Unchecked, 2.7s Time] [2021-11-20 05:45:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-11-20 05:45:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 577. [2021-11-20 05:45:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 388 states have (on average 1.1881443298969072) internal successors, (461), 394 states have internal predecessors, (461), 141 states have call successors, (141), 34 states have call predecessors, (141), 46 states have return successors, (262), 148 states have call predecessors, (262), 139 states have call successors, (262) [2021-11-20 05:45:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 864 transitions. [2021-11-20 05:45:17,910 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 864 transitions. Word has length 340 [2021-11-20 05:45:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 864 transitions. [2021-11-20 05:45:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 3.425) internal successors, (137), 36 states have internal predecessors, (137), 14 states have call successors, (35), 10 states have call predecessors, (35), 13 states have return successors, (32), 12 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-20 05:45:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 864 transitions. [2021-11-20 05:45:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 05:45:17,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:17,915 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:17,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:18,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 05:45:18,144 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash 999693748, now seen corresponding path program 1 times [2021-11-20 05:45:18,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320590838] [2021-11-20 05:45:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:18,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:18,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170252191] [2021-11-20 05:45:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:18,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:18,195 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:18,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 05:45:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 3598 conjuncts, 158 conjunts are in the unsatisfiable core [2021-11-20 05:45:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:21,593 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))))) is different from true [2021-11-20 05:46:25,431 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-20 05:46:27,711 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-20 05:46:30,343 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int)) (let ((.cse1 (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_DerPreprocessor_5))) (.cse0 (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_DerPreprocessor_6)))) (and (= |c_#memory_$Pointer$.offset| (store .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155| (store (select .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155|) 0 (select (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155|) 0)))) (= |c_#memory_$Pointer$.base| (store .cse1 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155| (store (select .cse1 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155|) 0 (select (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_155|) 0)))) (let ((.cse2 (+ 40 |c_aws_priority_queue_is_valid_#in~queue#1.offset|))) (or (not (= (select (select .cse1 |c_aws_priority_queue_is_valid_#in~queue#1.base|) .cse2) 0)) (not (= (select (select .cse0 |c_aws_priority_queue_is_valid_#in~queue#1.base|) .cse2) 0))))))) is different from true [2021-11-20 05:46:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:46:37,056 INFO L354 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2021-11-20 05:46:37,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 115 [2021-11-20 05:46:37,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:46:37,284 INFO L354 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2021-11-20 05:46:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 130 [2021-11-20 05:49:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 519 proven. 7 refuted. 0 times theorem prover too weak. 309 trivial. 22 not checked. [2021-11-20 05:49:27,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:31,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_8 Int) (v_DerPreprocessor_7 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_167| Int)) (let ((.cse0 (+ 32 c_aws_array_list_length_~list.offset))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_167| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_167|) 0 v_DerPreprocessor_7)) c_aws_array_list_length_~list.base) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_167| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_167|) 0 v_DerPreprocessor_8)) c_aws_array_list_length_~list.base) .cse0) 0))))) is different from false [2021-11-20 05:49:31,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320590838] [2021-11-20 05:49:31,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:49:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170252191] [2021-11-20 05:49:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170252191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:31,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:31,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-20 05:49:31,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258034659] [2021-11-20 05:49:31,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:31,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:49:31,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:49:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=683, Unknown=62, NotChecked=290, Total=1122 [2021-11-20 05:49:31,008 INFO L87 Difference]: Start difference. First operand 577 states and 864 transitions. Second operand has 33 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-20 05:49:35,290 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|)))) is different from true [2021-11-20 05:50:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:17,776 INFO L93 Difference]: Finished difference Result 1135 states and 1759 transitions. [2021-11-20 05:50:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:50:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) Word has length 346 [2021-11-20 05:50:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:17,786 INFO L225 Difference]: With dead ends: 1135 [2021-11-20 05:50:17,787 INFO L226 Difference]: Without dead ends: 747 [2021-11-20 05:50:17,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 343 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 274.5s TimeCoverageRelationStatistics Valid=140, Invalid=1213, Unknown=77, NotChecked=462, Total=1892 [2021-11-20 05:50:17,792 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 269 mSDsluCounter, 4913 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 8135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5705 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:17,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 5416 Invalid, 8135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2260 Invalid, 0 Unknown, 5705 Unchecked, 11.7s Time] [2021-11-20 05:50:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-11-20 05:50:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 612. [2021-11-20 05:50:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 414 states have (on average 1.1859903381642511) internal successors, (491), 421 states have internal predecessors, (491), 147 states have call successors, (147), 36 states have call predecessors, (147), 49 states have return successors, (304), 154 states have call predecessors, (304), 145 states have call successors, (304) [2021-11-20 05:50:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 942 transitions. [2021-11-20 05:50:17,855 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 942 transitions. Word has length 346 [2021-11-20 05:50:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:17,856 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 942 transitions. [2021-11-20 05:50:17,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 17 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-20 05:50:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 942 transitions. [2021-11-20 05:50:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 05:50:17,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:17,862 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:18,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:18,076 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:50:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1852950966, now seen corresponding path program 1 times [2021-11-20 05:50:18,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:18,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529136405] [2021-11-20 05:50:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:18,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:50:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:50:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:50:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 05:50:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:50:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:50:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:50:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 05:50:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 05:50:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:50:18,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:18,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529136405] [2021-11-20 05:50:18,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-20 05:50:18,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491320235] [2021-11-20 05:50:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:18,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:18,577 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:18,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 05:50:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 3595 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:50:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2021-11-20 05:50:21,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:50:21,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491320235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:21,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:21,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:50:21,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342750402] [2021-11-20 05:50:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:21,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:50:21,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:50:21,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:50:21,068 INFO L87 Difference]: Start difference. First operand 612 states and 942 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 05:50:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:21,135 INFO L93 Difference]: Finished difference Result 1193 states and 1847 transitions. [2021-11-20 05:50:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:50:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 346 [2021-11-20 05:50:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:21,140 INFO L225 Difference]: With dead ends: 1193 [2021-11-20 05:50:21,140 INFO L226 Difference]: Without dead ends: 599 [2021-11-20 05:50:21,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:50:21,145 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 0 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:21,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 965 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:50:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-20 05:50:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-20 05:50:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 406 states have (on average 1.187192118226601) internal successors, (482), 412 states have internal predecessors, (482), 145 states have call successors, (145), 34 states have call predecessors, (145), 46 states have return successors, (299), 152 states have call predecessors, (299), 143 states have call successors, (299) [2021-11-20 05:50:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 926 transitions. [2021-11-20 05:50:21,197 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 926 transitions. Word has length 346 [2021-11-20 05:50:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:21,197 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 926 transitions. [2021-11-20 05:50:21,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 05:50:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 926 transitions. [2021-11-20 05:50:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 05:50:21,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:21,203 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:21,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:21,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:21,419 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:50:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1646392735, now seen corresponding path program 1 times [2021-11-20 05:50:21,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:21,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132839791] [2021-11-20 05:50:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:21,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:21,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:50:21,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307433541] [2021-11-20 05:50:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:21,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:21,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:21,476 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:21,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 05:50:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 3606 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-20 05:50:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:22,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:50:24,301 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:50:24,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 05:51:04,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 05:51:04,092 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 05:51:04,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 05:51:13,537 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-11-20 05:51:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 43 [2021-11-20 05:51:13,704 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 05:51:13,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 05:51:14,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:51:14,289 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-20 05:51:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 34 [2021-11-20 05:51:17,742 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 05:51:49,236 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 05:51:51,283 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 05:52:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:07,103 INFO L354 Elim1Store]: treesize reduction 134, result has 21.2 percent of original size [2021-11-20 05:52:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 79 [2021-11-20 05:52:07,271 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 05:52:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 75 [2021-11-20 05:52:39,261 INFO L354 Elim1Store]: treesize reduction 51, result has 19.0 percent of original size [2021-11-20 05:52:39,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 47 [2021-11-20 05:52:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 398 proven. 40 refuted. 4 times theorem prover too weak. 374 trivial. 10 not checked. [2021-11-20 05:52:41,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:50,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132839791] [2021-11-20 05:52:50,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:52:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307433541] [2021-11-20 05:52:50,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307433541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:50,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:52:50,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-11-20 05:52:50,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238087240] [2021-11-20 05:52:50,907 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:50,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:52:50,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:52:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2207, Unknown=43, NotChecked=294, Total=2756 [2021-11-20 05:52:50,909 INFO L87 Difference]: Start difference. First operand 599 states and 926 transitions. Second operand has 46 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 17 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 14 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-20 05:55:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:16,173 INFO L93 Difference]: Finished difference Result 1297 states and 2025 transitions. [2021-11-20 05:55:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 05:55:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 17 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 14 states have call predecessors, (33), 17 states have call successors, (33) Word has length 346 [2021-11-20 05:55:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:16,181 INFO L225 Difference]: With dead ends: 1297 [2021-11-20 05:55:16,182 INFO L226 Difference]: Without dead ends: 766 [2021-11-20 05:55:16,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 510 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 259.0s TimeCoverageRelationStatistics Valid=399, Invalid=4627, Unknown=98, NotChecked=426, Total=5550 [2021-11-20 05:55:16,187 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 255 mSDsluCounter, 6377 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 6882 SdHoareTripleChecker+Invalid, 11502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7666 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:16,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 6882 Invalid, 11502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3652 Invalid, 0 Unknown, 7666 Unchecked, 19.1s Time] [2021-11-20 05:55:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-20 05:55:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 630. [2021-11-20 05:55:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 427 states have (on average 1.1873536299765808) internal successors, (507), 435 states have internal predecessors, (507), 149 states have call successors, (149), 38 states have call predecessors, (149), 52 states have return successors, (309), 156 states have call predecessors, (309), 147 states have call successors, (309) [2021-11-20 05:55:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 965 transitions. [2021-11-20 05:55:16,259 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 965 transitions. Word has length 346 [2021-11-20 05:55:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:16,260 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 965 transitions. [2021-11-20 05:55:16,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 17 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 14 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-20 05:55:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 965 transitions. [2021-11-20 05:55:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-20 05:55:16,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:16,269 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:16,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:16,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 05:55:16,490 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -146353957, now seen corresponding path program 1 times [2021-11-20 05:55:16,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:16,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960723409] [2021-11-20 05:55:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:16,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:16,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751132593] [2021-11-20 05:55:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:16,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:16,563 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:16,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_199461c2-000f-4289-a1b0-794de2c70b0a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 05:55:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:55:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-11-20 05:55:19,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:19,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960723409] [2021-11-20 05:55:19,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751132593] [2021-11-20 05:55:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751132593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:19,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:55:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393638870] [2021-11-20 05:55:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:55:19,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:55:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:19,232 INFO L87 Difference]: Start difference. First operand 630 states and 965 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32)