./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL --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 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:27:43,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:27:43,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:27:43,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:27:43,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:27:43,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:27:43,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:27:43,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:27:43,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:27:43,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:27:43,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:27:43,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:27:43,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:27:43,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:27:43,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:27:43,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:27:43,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:27:43,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:27:43,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:27:43,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:27:43,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:27:43,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:27:43,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:27:43,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:27:43,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:27:43,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:27:43,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:27:43,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:27:43,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:27:43,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:27:43,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:27:43,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:27:43,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:27:43,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:27:43,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:27:43,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:27:43,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:27:43,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:27:43,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:27:43,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:27:43,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:27:43,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 05:27:43,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:27:43,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:27:43,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:27:43,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:27:43,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:27:43,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:27:43,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:27:43,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:27:43,203 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:27:43,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:27:43,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:27:43,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:27:43,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:27:43,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:27:43,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:27:43,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:27:43,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:27:43,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:27:43,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:27:43,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:27:43,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:27:43,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:43,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:27:43,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:27:43,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:27:43,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:27:43,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:27:43,218 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:27:43,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:27:43,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:27:43,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:27:43,221 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_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2021-11-19 05:27:43,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:27:43,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:27:43,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:27:43,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:27:43,606 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:27:43,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-19 05:27:43,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/data/d898bbb1b/f339a7fa4121414fac705cc497913820/FLAG2ed44ed85 [2021-11-19 05:27:44,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:27:44,709 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-19 05:27:44,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/data/d898bbb1b/f339a7fa4121414fac705cc497913820/FLAG2ed44ed85 [2021-11-19 05:27:45,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/data/d898bbb1b/f339a7fa4121414fac705cc497913820 [2021-11-19 05:27:45,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:27:45,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:27:45,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:45,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:27:45,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:27:45,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:45" (1/1) ... [2021-11-19 05:27:45,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad7a0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:45, skipping insertion in model container [2021-11-19 05:27:45,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:45" (1/1) ... [2021-11-19 05:27:45,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:27:45,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:27:45,687 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_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-19 05:27:45,695 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_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-19 05:27:45,722 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:27:45,729 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:27:46,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,828 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,829 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,830 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,832 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,850 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,851 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,854 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,855 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,862 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,864 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,869 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:46,870 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,372 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:27:47,378 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:27:47,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:27:47,386 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:27:47,388 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:27:47,391 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:27:47,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:27:47,394 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:27:47,396 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:27:47,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:27:47,628 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:27:47,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:47,719 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:27:47,737 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_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-19 05:27:47,738 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_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-19 05:27:47,740 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 05:27:47,743 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 05:27:47,799 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,800 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,800 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,801 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,802 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,813 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,814 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,815 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,817 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,818 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,819 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,819 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 05:27:47,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 05:27:47,874 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 05:27:47,875 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 05:27:47,876 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 05:27:47,878 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 05:27:47,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 05:27:47,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 05:27:47,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 05:27:47,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 05:27:47,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 05:27:47,917 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 05:27:47,937 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:48,122 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:27:48,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48 WrapperNode [2021-11-19 05:27:48,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:48,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:48,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:27:48,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:27:48,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,272 INFO L137 Inliner]: procedures = 681, calls = 1034, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 28 [2021-11-19 05:27:48,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:48,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:27:48,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:27:48,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:27:48,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:27:48,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:27:48,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:27:48,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:27:48,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (1/1) ... [2021-11-19 05:27:48,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:48,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:27:48,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:27:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-19 05:27:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-19 05:27:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-19 05:27:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-19 05:27:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:27:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:27:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:27:48,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:27:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:27:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:27:48,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:27:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 05:27:48,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 05:27:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 05:27:48,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 05:27:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:27:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:27:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:27:48,869 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:27:48,873 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:27:49,065 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:27:49,073 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:27:49,073 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 05:27:49,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:49 BoogieIcfgContainer [2021-11-19 05:27:49,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:27:49,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:27:49,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:27:49,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:27:49,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:27:45" (1/3) ... [2021-11-19 05:27:49,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d7b630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:49, skipping insertion in model container [2021-11-19 05:27:49,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:48" (2/3) ... [2021-11-19 05:27:49,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d7b630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:49, skipping insertion in model container [2021-11-19 05:27:49,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:49" (3/3) ... [2021-11-19 05:27:49,087 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2021-11-19 05:27:49,095 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:27:49,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:27:49,159 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:27:49,168 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 [2021-11-19 05:27:49,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:27:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:27:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:27:49,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:49,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:49,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2021-11-19 05:27:49,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:49,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272395371] [2021-11-19 05:27:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:49,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:49,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:49,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 05:27:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:49,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:49,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272395371] [2021-11-19 05:27:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272395371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:49,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:49,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:27:49,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720133521] [2021-11-19 05:27:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:27:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:27:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:27:49,847 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:27:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:49,886 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-11-19 05:27:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:27:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-19 05:27:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:49,905 INFO L225 Difference]: With dead ends: 75 [2021-11-19 05:27:49,911 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 05:27:49,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:27:49,920 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:49,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 05:27:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-19 05:27:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:27:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-19 05:27:49,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-11-19 05:27:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:49,983 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-19 05:27:49,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:27:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-19 05:27:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 05:27:49,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:49,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:49,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:27:49,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2021-11-19 05:27:49,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:49,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406341844] [2021-11-19 05:27:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:49,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:27:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 05:27:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:50,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:50,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406341844] [2021-11-19 05:27:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406341844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:50,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:27:50,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841441387] [2021-11-19 05:27:50,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:50,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:27:50,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:27:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:27:50,326 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:27:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:50,509 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-19 05:27:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:27:50,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-19 05:27:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:50,511 INFO L225 Difference]: With dead ends: 61 [2021-11-19 05:27:50,512 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 05:27:50,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:50,514 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:50,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 05:27:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-19 05:27:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:27:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-19 05:27:50,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2021-11-19 05:27:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:50,527 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-19 05:27:50,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:27:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-19 05:27:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:27:50,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:50,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:50,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:27:50,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2047649194, now seen corresponding path program 1 times [2021-11-19 05:27:50,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:50,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252903260] [2021-11-19 05:27:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:50,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:27:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:27:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:50,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:50,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252903260] [2021-11-19 05:27:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252903260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:50,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200527752] [2021-11-19 05:27:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:50,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:50,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:27:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:27:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-19 05:27:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:52,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:52,991 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 14 treesize of output 12 [2021-11-19 05:27:52,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-19 05:27:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:53,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200527752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:53,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:53,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-11-19 05:27:53,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190505391] [2021-11-19 05:27:53,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:53,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:27:53,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:27:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:27:53,098 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:27:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:53,815 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-19 05:27:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:27:53,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2021-11-19 05:27:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:53,821 INFO L225 Difference]: With dead ends: 70 [2021-11-19 05:27:53,821 INFO L226 Difference]: Without dead ends: 46 [2021-11-19 05:27:53,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:27:53,823 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:53,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 187 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2021-11-19 05:27:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-19 05:27:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-11-19 05:27:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:27:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-19 05:27:53,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2021-11-19 05:27:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-19 05:27:53,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:27:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-19 05:27:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 05:27:53,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:53,859 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 05:27:53,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:54,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-19 05:27:54,079 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 2 times [2021-11-19 05:27:54,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:54,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001970451] [2021-11-19 05:27:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:54,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:54,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:27:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:54,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 05:27:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:54,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:54,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001970451] [2021-11-19 05:27:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001970451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:54,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073765852] [2021-11-19 05:27:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:27:54,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:54,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:54,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:27:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:27:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 05:27:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-19 05:27:54,913 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 05:27:54,914 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 29 treesize of output 28 [2021-11-19 05:27:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:27:55,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:56,188 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 17 treesize of output 15 [2021-11-19 05:27:56,342 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 14 treesize of output 12 [2021-11-19 05:27:56,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-19 05:27:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:27:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073765852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:56,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:56,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 19 [2021-11-19 05:27:56,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861783990] [2021-11-19 05:27:56,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:56,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:27:56,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:56,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:27:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:27:56,430 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:27:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:57,203 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-19 05:27:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:27:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2021-11-19 05:27:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:57,205 INFO L225 Difference]: With dead ends: 77 [2021-11-19 05:27:57,206 INFO L226 Difference]: Without dead ends: 51 [2021-11-19 05:27:57,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:27:57,208 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:57,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 227 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 259 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2021-11-19 05:27:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-19 05:27:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-11-19 05:27:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 05:27:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-19 05:27:57,222 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 28 [2021-11-19 05:27:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:57,223 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-19 05:27:57,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:27:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-19 05:27:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 05:27:57,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:57,225 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:57,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:57,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:57,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash 253270495, now seen corresponding path program 1 times [2021-11-19 05:27:57,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:57,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969434215] [2021-11-19 05:27:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:57,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:27:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 05:27:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:27:57,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:57,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969434215] [2021-11-19 05:27:57,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969434215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:57,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:57,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 05:27:57,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004119961] [2021-11-19 05:27:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:57,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:27:57,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:27:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:57,613 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:27:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:57,803 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-11-19 05:27:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:27:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-11-19 05:27:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:57,806 INFO L225 Difference]: With dead ends: 56 [2021-11-19 05:27:57,806 INFO L226 Difference]: Without dead ends: 54 [2021-11-19 05:27:57,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:27:57,807 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:57,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-19 05:27:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-19 05:27:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:27:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-19 05:27:57,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 29 [2021-11-19 05:27:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:57,840 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-19 05:27:57,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:27:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-19 05:27:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 05:27:57,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:57,845 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:57,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:27:57,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2056328172, now seen corresponding path program 1 times [2021-11-19 05:27:57,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:57,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807180410] [2021-11-19 05:27:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:57,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:27:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:27:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 05:27:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:27:58,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:58,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807180410] [2021-11-19 05:27:58,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807180410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:58,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804370380] [2021-11-19 05:27:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:58,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:58,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:58,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:27:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:58,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 05:27:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:58,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:27:58,519 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:27:58,519 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 25 treesize of output 24 [2021-11-19 05:27:58,618 INFO L354 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2021-11-19 05:27:58,619 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 3 case distinctions, treesize of input 44 treesize of output 39 [2021-11-19 05:28:00,883 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memset_#t~loopctr676_28| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_7 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_7 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_7))) (let ((.cse1 (select .cse0 (+ (- 2) |v_#Ultimate.C_memset_#t~loopctr676_28| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_7)))) (and (<= 2 |v_#Ultimate.C_memset_#t~loopctr676_28|) (<= |v_#Ultimate.C_memset_#t~loopctr676_28| 2) (= (select .cse0 (+ |v_#Ultimate.C_memset_#t~loopctr676_28| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_7)) .cse1) (= (select .cse0 (+ (- 1) |v_#Ultimate.C_memset_#t~loopctr676_28| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_7)) .cse1))))) is different from true [2021-11-19 05:28:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:28:13,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:19,945 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 55 treesize of output 51 [2021-11-19 05:28:19,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 05:28:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 321 [2021-11-19 05:28:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:28:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804370380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:20,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:28:20,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 13] total 30 [2021-11-19 05:28:20,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738164709] [2021-11-19 05:28:20,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 05:28:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 05:28:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=719, Unknown=2, NotChecked=54, Total=870 [2021-11-19 05:28:20,533 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 28 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:28:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:24,681 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2021-11-19 05:28:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 05:28:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 28 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2021-11-19 05:28:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:24,684 INFO L225 Difference]: With dead ends: 104 [2021-11-19 05:28:24,684 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 05:28:24,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=171, Invalid=1390, Unknown=3, NotChecked=76, Total=1640 [2021-11-19 05:28:24,687 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:24,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 239 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 435 Invalid, 0 Unknown, 203 Unchecked, 0.9s Time] [2021-11-19 05:28:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 05:28:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-11-19 05:28:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:28:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-19 05:28:24,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 32 [2021-11-19 05:28:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:24,704 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-19 05:28:24,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 28 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:28:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-19 05:28:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 05:28:24,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:24,706 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:24,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:24,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:24,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:24,916 INFO L85 PathProgramCache]: Analyzing trace with hash 408862954, now seen corresponding path program 2 times [2021-11-19 05:28:24,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:24,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775639530] [2021-11-19 05:28:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:24,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:25,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:25,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:28:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 05:28:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:28:25,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:25,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775639530] [2021-11-19 05:28:25,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775639530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:25,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760794196] [2021-11-19 05:28:25,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:28:25,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:25,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:25,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:25,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:28:25,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:28:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 05:28:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:28:25,689 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:28:25,689 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 25 treesize of output 24 [2021-11-19 05:28:25,770 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:28:25,771 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:28:25,873 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-11-19 05:28:25,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 52 [2021-11-19 05:28:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:28:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:30,207 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 57 treesize of output 53 [2021-11-19 05:28:36,688 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 67 treesize of output 63 [2021-11-19 05:28:36,700 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 05:28:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 689 treesize of output 683 [2021-11-19 05:28:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:28:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760794196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:38,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:28:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 15] total 38 [2021-11-19 05:28:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733361831] [2021-11-19 05:28:38,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:38,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 05:28:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 05:28:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1273, Unknown=3, NotChecked=0, Total=1406 [2021-11-19 05:28:38,954 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 38 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:28:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:48,039 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-11-19 05:28:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:28:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 36 [2021-11-19 05:28:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:48,042 INFO L225 Difference]: With dead ends: 110 [2021-11-19 05:28:48,042 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 05:28:48,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=269, Invalid=2918, Unknown=5, NotChecked=0, Total=3192 [2021-11-19 05:28:48,046 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:48,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 266 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1052 Invalid, 0 Unknown, 124 Unchecked, 2.0s Time] [2021-11-19 05:28:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 05:28:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-11-19 05:28:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:28:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-19 05:28:48,073 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 36 [2021-11-19 05:28:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-19 05:28:48,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:28:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-19 05:28:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 05:28:48,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:48,082 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:48,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-19 05:28:48,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:48,303 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:48,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1642266924, now seen corresponding path program 3 times [2021-11-19 05:28:48,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:48,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494096540] [2021-11-19 05:28:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:48,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:48,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:48,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:28:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:48,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:28:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:48,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:48,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494096540] [2021-11-19 05:28:48,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494096540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:48,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228451778] [2021-11-19 05:28:48,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:28:48,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:48,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:48,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:28:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:28:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 05:28:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:48,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:28:48,997 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:28:48,997 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 25 treesize of output 24 [2021-11-19 05:28:49,070 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:28:49,071 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:28:49,174 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:28:49,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:28:49,297 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:28:49,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:28:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:49,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:28:49,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228451778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:49,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:28:49,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-19 05:28:49,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863187378] [2021-11-19 05:28:49,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:49,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:28:49,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:28:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:28:49,998 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:28:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:50,794 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2021-11-19 05:28:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:28:50,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-19 05:28:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:50,796 INFO L225 Difference]: With dead ends: 106 [2021-11-19 05:28:50,796 INFO L226 Difference]: Without dead ends: 62 [2021-11-19 05:28:50,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:28:50,799 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:50,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 194 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 281 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2021-11-19 05:28:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-19 05:28:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-19 05:28:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 47 states have internal predecessors, (56), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:28:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-11-19 05:28:50,814 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 40 [2021-11-19 05:28:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:50,814 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-19 05:28:50,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:28:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-11-19 05:28:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:28:50,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:50,816 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:50,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-19 05:28:51,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:51,031 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1165720024, now seen corresponding path program 4 times [2021-11-19 05:28:51,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:51,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088995902] [2021-11-19 05:28:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:51,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:28:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:28:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:51,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:51,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088995902] [2021-11-19 05:28:51,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088995902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:51,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605964306] [2021-11-19 05:28:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:28:51,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:51,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:51,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:28:51,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:28:51,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:28:51,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 05:28:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:51,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:28:51,832 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:28:51,832 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 25 treesize of output 24 [2021-11-19 05:28:51,914 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:28:51,914 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:28:52,010 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:28:52,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:28:52,117 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:28:52,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:28:52,251 INFO L354 Elim1Store]: treesize reduction 285, result has 15.2 percent of original size [2021-11-19 05:28:52,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 78 [2021-11-19 05:28:54,708 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15 Int) (|v_#Ultimate.C_memset_#t~loopctr676_67| Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13))) (let ((.cse1 (select .cse0 (+ |v_#Ultimate.C_memset_#t~loopctr676_67| (- 3) v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15)))) (and (= (select .cse0 (+ |v_#Ultimate.C_memset_#t~loopctr676_67| (- 5) v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15)) .cse1) (= .cse1 (select .cse0 (+ (- 1) |v_#Ultimate.C_memset_#t~loopctr676_67| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15))) (= (select .cse0 (+ (- 2) |v_#Ultimate.C_memset_#t~loopctr676_67| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15)) .cse1) (<= |v_#Ultimate.C_memset_#t~loopctr676_67| 5) (= (select .cse0 (+ |v_#Ultimate.C_memset_#t~loopctr676_67| v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15)) .cse1) (= .cse1 (select .cse0 (+ |v_#Ultimate.C_memset_#t~loopctr676_67| (- 4) v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15))) (<= 5 |v_#Ultimate.C_memset_#t~loopctr676_67|))))) is different from true [2021-11-19 05:29:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:29:12,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:29:19,799 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 93 treesize of output 89 [2021-11-19 05:29:19,809 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 05:29:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3149 treesize of output 3141 [2021-11-19 05:29:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:29:30,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605964306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:29:30,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:29:30,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 18] total 43 [2021-11-19 05:29:30,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049126882] [2021-11-19 05:29:30,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:29:30,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 05:29:30,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 05:29:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1572, Unknown=2, NotChecked=80, Total=1806 [2021-11-19 05:29:30,806 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 41 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:29:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:37,862 INFO L93 Difference]: Finished difference Result 131 states and 164 transitions. [2021-11-19 05:29:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:29:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 41 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2021-11-19 05:29:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:37,865 INFO L225 Difference]: With dead ends: 131 [2021-11-19 05:29:37,865 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 05:29:37,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=314, Invalid=3347, Unknown=3, NotChecked=118, Total=3782 [2021-11-19 05:29:37,869 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:37,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 326 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1284 Invalid, 0 Unknown, 405 Unchecked, 2.4s Time] [2021-11-19 05:29:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 05:29:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-11-19 05:29:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 51 states have internal predecessors, (62), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:29:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-19 05:29:37,891 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 41 [2021-11-19 05:29:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:37,892 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-19 05:29:37,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 41 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:29:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-19 05:29:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:29:37,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:37,894 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:37,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:38,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -150209962, now seen corresponding path program 5 times [2021-11-19 05:29:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:38,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863404983] [2021-11-19 05:29:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:38,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:29:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:38,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:29:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 05:29:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:29:38,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863404983] [2021-11-19 05:29:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863404983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:38,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449625369] [2021-11-19 05:29:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:29:38,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:38,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:38,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:29:44,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 05:29:44,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:29:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 05:29:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:44,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:29:44,337 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:29:44,338 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 25 treesize of output 24 [2021-11-19 05:29:44,397 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:29:44,397 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:29:44,477 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:29:44,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:29:44,615 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:29:44,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:29:44,748 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-19 05:29:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-19 05:29:44,911 INFO L354 Elim1Store]: treesize reduction 384, result has 13.7 percent of original size [2021-11-19 05:29:44,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 94 [2021-11-19 05:29:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:29:47,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:29:50,176 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 52 treesize of output 50 [2021-11-19 05:29:50,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3182 treesize of output 3178 [2021-11-19 05:29:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:29:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449625369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:29:50,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:29:50,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 18] total 44 [2021-11-19 05:29:50,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412099911] [2021-11-19 05:29:50,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:29:50,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 05:29:50,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 05:29:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:29:50,424 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:29:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:53,811 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2021-11-19 05:29:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:29:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-19 05:29:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:53,813 INFO L225 Difference]: With dead ends: 141 [2021-11-19 05:29:53,813 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 05:29:53,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=339, Invalid=3201, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 05:29:53,816 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:53,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 224 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1116 Invalid, 0 Unknown, 93 Unchecked, 2.2s Time] [2021-11-19 05:29:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 05:29:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2021-11-19 05:29:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:29:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-11-19 05:29:53,837 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 45 [2021-11-19 05:29:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:53,837 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-11-19 05:29:53,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:29:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-11-19 05:29:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 05:29:53,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:53,840 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-11-19 05:29:53,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:54,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash 389849080, now seen corresponding path program 1 times [2021-11-19 05:29:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:54,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426202878] [2021-11-19 05:29:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:29:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 05:29:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:29:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:29:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:29:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:29:54,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426202878] [2021-11-19 05:29:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426202878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760521132] [2021-11-19 05:29:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:54,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:54,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:54,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:29:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:29:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:29:54,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:29:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 05:29:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760521132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:29:55,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:29:55,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 4] total 18 [2021-11-19 05:29:55,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801875707] [2021-11-19 05:29:55,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:29:55,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:29:55,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:29:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:29:55,136 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 05:29:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:55,793 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-11-19 05:29:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:29:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 48 [2021-11-19 05:29:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:55,795 INFO L225 Difference]: With dead ends: 129 [2021-11-19 05:29:55,795 INFO L226 Difference]: Without dead ends: 73 [2021-11-19 05:29:55,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:29:55,797 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:55,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 167 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:29:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-19 05:29:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-19 05:29:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 56 states have internal predecessors, (66), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:29:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-11-19 05:29:55,812 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 48 [2021-11-19 05:29:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:55,812 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-11-19 05:29:55,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 05:29:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-11-19 05:29:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 05:29:55,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:55,814 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:55,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:56,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 05:29:56,019 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 221385708, now seen corresponding path program 6 times [2021-11-19 05:29:56,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:56,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76949157] [2021-11-19 05:29:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:56,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:56,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:29:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:56,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:29:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:29:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 05:29:56,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:56,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76949157] [2021-11-19 05:29:56,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76949157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:56,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790693438] [2021-11-19 05:29:56,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:29:56,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:56,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:56,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:29:57,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-19 05:29:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:29:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-19 05:29:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:29:57,638 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:29:57,638 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 25 treesize of output 24 [2021-11-19 05:29:57,731 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:29:57,731 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:29:57,835 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:29:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:29:57,987 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:29:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:29:58,149 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-19 05:29:58,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-19 05:29:58,341 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-19 05:29:58,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-19 05:29:58,565 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-19 05:29:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 05:29:58,840 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-19 05:29:58,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-19 05:29:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 05:29:59,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:00,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790693438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:00,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:30:00,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-11-19 05:30:00,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778717713] [2021-11-19 05:30:00,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:30:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:30:00,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:30:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:30:00,011 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:30:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:01,128 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2021-11-19 05:30:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:30:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-19 05:30:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:01,130 INFO L225 Difference]: With dead ends: 122 [2021-11-19 05:30:01,130 INFO L226 Difference]: Without dead ends: 72 [2021-11-19 05:30:01,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:30:01,132 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:01,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 297 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 460 Invalid, 0 Unknown, 35 Unchecked, 1.0s Time] [2021-11-19 05:30:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-19 05:30:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-19 05:30:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 57 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:30:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-11-19 05:30:01,148 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 50 [2021-11-19 05:30:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:01,148 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-11-19 05:30:01,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:30:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-11-19 05:30:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:30:01,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:01,150 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:01,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:01,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:01,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1875073640, now seen corresponding path program 7 times [2021-11-19 05:30:01,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:30:01,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965087342] [2021-11-19 05:30:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:30:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:01,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:30:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:30:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 05:30:01,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:30:01,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965087342] [2021-11-19 05:30:01,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965087342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:01,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960965262] [2021-11-19 05:30:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:30:01,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:30:01,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:30:01,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:30:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-19 05:30:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:02,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:30:02,914 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:30:02,915 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 25 treesize of output 24 [2021-11-19 05:30:03,000 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:30:03,000 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:30:03,103 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:30:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:30:03,234 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:30:03,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:30:03,392 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-19 05:30:03,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-19 05:30:03,629 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-19 05:30:03,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-19 05:30:03,905 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-19 05:30:03,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 05:30:04,214 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-19 05:30:04,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-19 05:30:04,641 INFO L354 Elim1Store]: treesize reduction 1134, result has 9.4 percent of original size [2021-11-19 05:30:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 237 treesize of output 180 [2021-11-19 05:30:15,327 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_152_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:30:15,328 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_152_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 05:30:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:30:15,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:21,696 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 117 treesize of output 113 [2021-11-19 05:30:42,284 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 139 treesize of output 135 [2021-11-19 05:30:42,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 05:30:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46809 treesize of output 46803 [2021-11-19 05:38:44,242 WARN L227 SmtUtils]: Spent 5.06m on a formula simplification. DAG size of input: 13979 DAG size of output: 13976 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 05:39:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:39:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960965262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:58,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:39:58,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 24] total 63 [2021-11-19 05:39:58,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082138086] [2021-11-19 05:39:58,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:58,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-19 05:39:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:39:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-19 05:39:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3616, Unknown=9, NotChecked=0, Total=3906 [2021-11-19 05:39:58,517 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:40:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:20,859 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2021-11-19 05:40:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:40:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 51 [2021-11-19 05:40:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:20,862 INFO L225 Difference]: With dead ends: 142 [2021-11-19 05:40:20,863 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 05:40:20,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=635, Invalid=8283, Unknown=12, NotChecked=0, Total=8930 [2021-11-19 05:40:20,867 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 113 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:20,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 347 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2041 Invalid, 0 Unknown, 181 Unchecked, 6.7s Time] [2021-11-19 05:40:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 05:40:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2021-11-19 05:40:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 61 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 05:40:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-11-19 05:40:20,890 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 51 [2021-11-19 05:40:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:20,890 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-11-19 05:40:20,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 05:40:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-11-19 05:40:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:40:20,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:20,892 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:20,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:40:21,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:40:21,119 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:40:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash 860606358, now seen corresponding path program 8 times [2021-11-19 05:40:21,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:40:21,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011278512] [2021-11-19 05:40:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:21,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:40:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:21,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:40:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:40:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:40:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 05:40:21,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:40:21,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011278512] [2021-11-19 05:40:21,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011278512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:40:21,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658801645] [2021-11-19 05:40:21,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:40:21,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:40:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:40:21,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:40:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b97c61-59b1-4e3c-9fea-78b61bb7efd3/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:40:22,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:40:22,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:40:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-19 05:40:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-19 05:40:22,679 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-19 05:40:22,679 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 25 treesize of output 24 [2021-11-19 05:40:22,772 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-19 05:40:22,772 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 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-19 05:40:22,894 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-19 05:40:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-19 05:40:23,044 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-19 05:40:23,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-19 05:40:23,216 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-19 05:40:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-19 05:40:23,422 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-19 05:40:23,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-19 05:40:23,668 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-19 05:40:23,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 05:40:23,964 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-19 05:40:23,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-19 05:40:24,312 INFO L354 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2021-11-19 05:40:24,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-11-19 05:40:24,741 INFO L354 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2021-11-19 05:40:24,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 180 treesize of output 143 [2021-11-19 05:40:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:40:30,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:41,190 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 129 treesize of output 125 [2021-11-19 05:41:04,720 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 153 treesize of output 149 [2021-11-19 05:41:04,742 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 05:41:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102237 treesize of output 102229