./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:07:42,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:07:42,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:07:42,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:07:42,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:07:42,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:07:42,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:07:42,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:07:42,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:07:42,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:07:42,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:07:42,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:07:42,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:07:42,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:07:42,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:07:42,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:07:42,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:07:42,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:07:42,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:07:42,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:07:42,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:07:42,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:07:42,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:07:42,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:07:42,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:07:42,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:07:42,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:07:42,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:07:42,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:07:42,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:07:42,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:07:42,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:07:42,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:07:42,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:07:42,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:07:42,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:07:42,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:07:42,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:07:42,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:07:42,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:07:42,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:07:42,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 04:07:42,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:07:42,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:07:42,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:07:42,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:07:42,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:07:42,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:07:42,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:07:42,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:07:42,395 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:07:42,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:07:42,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:07:42,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:07:42,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:07:42,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:07:42,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:07:42,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:07:42,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:07:42,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:07:42,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:07:42,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:07:42,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:07:42,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:07:42,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:07:42,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:07:42,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:07:42,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:07:42,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:07:42,401 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:07:42,401 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:07:42,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:07:42,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:07:42,404 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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-19 04:07:42,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:07:42,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:07:42,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:07:42,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:07:42,712 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:07:42,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 04:07:42,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/data/6388e1fc6/f6430361729f4b698e3b37e8b41bfc4d/FLAGd579f50b3 [2021-11-19 04:07:43,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:07:43,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 04:07:43,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/data/6388e1fc6/f6430361729f4b698e3b37e8b41bfc4d/FLAGd579f50b3 [2021-11-19 04:07:43,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/data/6388e1fc6/f6430361729f4b698e3b37e8b41bfc4d [2021-11-19 04:07:43,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:07:43,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:07:43,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:07:43,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:07:43,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:07:43,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:07:43" (1/1) ... [2021-11-19 04:07:43,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f878329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:43, skipping insertion in model container [2021-11-19 04:07:43,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:07:43" (1/1) ... [2021-11-19 04:07:43,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:07:43,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:07:44,085 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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 04:07:44,091 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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 04:07:44,122 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:07:44,130 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:07:44,973 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,979 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,979 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,980 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,982 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,996 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,996 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:44,999 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,000 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,002 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,004 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,005 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,005 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,349 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:07:45,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:07:45,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:07:45,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:07:45,355 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:07:45,355 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:07:45,356 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:07:45,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:07:45,358 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:07:45,359 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:07:45,510 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:07:45,535 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:07:45,552 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:07:45,567 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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 04:07:45,567 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_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 04:07:45,569 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:07:45,570 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:07:45,693 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,694 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,694 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,695 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,696 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,704 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,713 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,728 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,729 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,730 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,731 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,731 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,731 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:07:45,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:07:45,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:07:45,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:07:45,771 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:07:45,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:07:45,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:07:45,774 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:07:45,774 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:07:45,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:07:45,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:07:45,799 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:07:45,814 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:07:46,075 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:07:46,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46 WrapperNode [2021-11-19 04:07:46,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:07:46,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:07:46,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:07:46,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:07:46,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,288 INFO L137 Inliner]: procedures = 681, calls = 1042, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2021-11-19 04:07:46,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:07:46,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:07:46,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:07:46,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:07:46,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:07:46,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:07:46,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:07:46,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:07:46,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (1/1) ... [2021-11-19 04:07:46,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:07:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:46,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:07:46,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:07:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:07:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:07:46,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:07:46,458 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 04:07:46,458 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 04:07:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:07:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 04:07:46,460 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 04:07:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:07:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:07:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:07:46,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:07:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:07:46,462 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:07:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:07:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:07:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:07:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 04:07:46,463 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 04:07:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:07:46,681 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:07:46,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:07:47,020 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:07:47,028 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:07:47,028 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:07:47,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:07:47 BoogieIcfgContainer [2021-11-19 04:07:47,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:07:47,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:07:47,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:07:47,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:07:47,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:07:43" (1/3) ... [2021-11-19 04:07:47,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da7e960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:07:47, skipping insertion in model container [2021-11-19 04:07:47,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:46" (2/3) ... [2021-11-19 04:07:47,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da7e960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:07:47, skipping insertion in model container [2021-11-19 04:07:47,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:07:47" (3/3) ... [2021-11-19 04:07:47,050 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-19 04:07:47,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:07:47,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:07:47,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:07:47,152 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 04:07:47,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:07:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:07:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:07:47,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:47,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-19 04:07:47,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-11-19 04:07:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:47,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70769803] [2021-11-19 04:07:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:47,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:07:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:07:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:07:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:07:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:07:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:07:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:07:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:07:47,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:47,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70769803] [2021-11-19 04:07:47,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70769803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:47,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:07:47,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:07:47,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752240446] [2021-11-19 04:07:47,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:47,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:07:47,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:07:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:07:47,929 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:07:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:47,961 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-11-19 04:07:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:07:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-19 04:07:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:47,972 INFO L225 Difference]: With dead ends: 128 [2021-11-19 04:07:47,972 INFO L226 Difference]: Without dead ends: 63 [2021-11-19 04:07:47,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 04:07:47,979 INFO L933 BasicCegarLoop]: 87 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, 87 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 04:07:47,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:07:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-19 04:07:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-19 04:07:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:07:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-11-19 04:07:48,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-11-19 04:07:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:48,024 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-11-19 04:07:48,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:07:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-11-19 04:07:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:07:48,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:48,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-19 04:07:48,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:07:48,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-11-19 04:07:48,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:48,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284258123] [2021-11-19 04:07:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:48,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:07:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:07:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:07:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:07:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:07:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:07:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:07:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:07:48,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:48,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284258123] [2021-11-19 04:07:48,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284258123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:07:48,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130126220] [2021-11-19 04:07:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:48,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:48,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:48,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:07:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:07:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:07:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:07:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:07:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-19 04:07:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:07:48,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-19 04:07:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:07:49,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:07:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130126220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:49,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:07:49,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-11-19 04:07:49,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654874922] [2021-11-19 04:07:49,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:49,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:07:49,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:07:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:07:49,959 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:07:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:50,193 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-11-19 04:07:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:07:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-19 04:07:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:50,201 INFO L225 Difference]: With dead ends: 144 [2021-11-19 04:07:50,201 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 04:07:50,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:07:50,211 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:50,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-11-19 04:07:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 04:07:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-11-19 04:07:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-19 04:07:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-11-19 04:07:50,248 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-11-19 04:07:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:50,250 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-11-19 04:07:50,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:07:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-11-19 04:07:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:07:50,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:50,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-19 04:07:50,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:50,489 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-11-19 04:07:50,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:50,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145275802] [2021-11-19 04:07:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:50,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:07:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:07:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:07:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:07:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:07:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:07:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:07:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:07:50,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:50,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145275802] [2021-11-19 04:07:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145275802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:07:50,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30736579] [2021-11-19 04:07:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:50,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:50,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:07:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:07:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:51,001 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 04:07:51,002 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-19 04:07:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:07:51,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:07:51,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30736579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:51,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:07:51,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-11-19 04:07:51,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725548853] [2021-11-19 04:07:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:51,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:07:51,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:07:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:07:51,635 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:07:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:51,726 INFO L93 Difference]: Finished difference Result 173 states and 238 transitions. [2021-11-19 04:07:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:07:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-19 04:07:51,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:51,729 INFO L225 Difference]: With dead ends: 173 [2021-11-19 04:07:51,730 INFO L226 Difference]: Without dead ends: 118 [2021-11-19 04:07:51,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:07:51,732 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:51,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 658 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 132 Unchecked, 0.0s Time] [2021-11-19 04:07:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-19 04:07:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-11-19 04:07:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 79 states have internal predecessors, (105), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-19 04:07:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2021-11-19 04:07:51,746 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 68 [2021-11-19 04:07:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:51,747 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2021-11-19 04:07:51,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:07:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2021-11-19 04:07:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:07:51,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:51,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:51,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:51,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:51,976 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 779681482, now seen corresponding path program 1 times [2021-11-19 04:07:51,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:51,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870683146] [2021-11-19 04:07:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:51,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:07:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:07:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:07:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:07:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:07:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:07:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:07:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:07:52,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:52,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870683146] [2021-11-19 04:07:52,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870683146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:07:52,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905957537] [2021-11-19 04:07:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:52,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:52,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:52,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:07:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 04:07:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:52,470 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-19 04:07:52,471 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-19 04:07:52,492 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 04:07:52,492 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-19 04:08:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:08:04,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:08:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905957537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:05,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:05,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 12] total 30 [2021-11-19 04:08:05,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232968795] [2021-11-19 04:08:05,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:08:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:08:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:08:05,553 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-19 04:08:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:07,979 INFO L93 Difference]: Finished difference Result 346 states and 525 transitions. [2021-11-19 04:08:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:08:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 68 [2021-11-19 04:08:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:07,985 INFO L225 Difference]: With dead ends: 346 [2021-11-19 04:08:07,985 INFO L226 Difference]: Without dead ends: 286 [2021-11-19 04:08:07,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=343, Invalid=2627, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:08:07,989 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2501 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:07,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 2501 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 627 Invalid, 0 Unknown, 674 Unchecked, 0.6s Time] [2021-11-19 04:08:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-19 04:08:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 249. [2021-11-19 04:08:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 206 states have (on average 1.4223300970873787) internal successors, (293), 216 states have internal predecessors, (293), 23 states have call successors, (23), 11 states have call predecessors, (23), 19 states have return successors, (57), 21 states have call predecessors, (57), 22 states have call successors, (57) [2021-11-19 04:08:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 373 transitions. [2021-11-19 04:08:08,034 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 373 transitions. Word has length 68 [2021-11-19 04:08:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 373 transitions. [2021-11-19 04:08:08,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (19), 4 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-19 04:08:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 373 transitions. [2021-11-19 04:08:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:08:08,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:08,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-19 04:08:08,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:08,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:08,248 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-11-19 04:08:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:08,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591460988] [2021-11-19 04:08:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:08,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:08:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 04:08:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:08:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:08:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 04:08:08,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591460988] [2021-11-19 04:08:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591460988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214009696] [2021-11-19 04:08:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:08,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:08,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:08,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:08:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:08:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:08:08,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:08,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214009696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:08,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:08,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-19 04:08:08,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585546159] [2021-11-19 04:08:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:08,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:08:08,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:08:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:08:08,865 INFO L87 Difference]: Start difference. First operand 249 states and 373 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:09,061 INFO L93 Difference]: Finished difference Result 448 states and 682 transitions. [2021-11-19 04:08:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:08:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-19 04:08:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:09,066 INFO L225 Difference]: With dead ends: 448 [2021-11-19 04:08:09,066 INFO L226 Difference]: Without dead ends: 278 [2021-11-19 04:08:09,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:08:09,069 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:09,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:08:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-19 04:08:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 259. [2021-11-19 04:08:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 213 states have (on average 1.3990610328638498) internal successors, (298), 226 states have internal predecessors, (298), 23 states have call successors, (23), 11 states have call predecessors, (23), 22 states have return successors, (67), 21 states have call predecessors, (67), 22 states have call successors, (67) [2021-11-19 04:08:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 388 transitions. [2021-11-19 04:08:09,130 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 388 transitions. Word has length 70 [2021-11-19 04:08:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:09,131 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 388 transitions. [2021-11-19 04:08:09,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 388 transitions. [2021-11-19 04:08:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 04:08:09,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:09,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:09,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:09,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:09,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-11-19 04:08:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:09,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944311619] [2021-11-19 04:08:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:09,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:08:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:08:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:08:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 04:08:09,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:09,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944311619] [2021-11-19 04:08:09,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944311619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:09,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308279329] [2021-11-19 04:08:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:09,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:09,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:09,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:08:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:08:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:08:09,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:09,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308279329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:09,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:09,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-11-19 04:08:09,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042054750] [2021-11-19 04:08:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:09,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:08:09,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:08:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:08:09,897 INFO L87 Difference]: Start difference. First operand 259 states and 388 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:10,180 INFO L93 Difference]: Finished difference Result 520 states and 798 transitions. [2021-11-19 04:08:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:08:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-19 04:08:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:10,185 INFO L225 Difference]: With dead ends: 520 [2021-11-19 04:08:10,185 INFO L226 Difference]: Without dead ends: 338 [2021-11-19 04:08:10,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:08:10,188 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:08:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-19 04:08:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 267. [2021-11-19 04:08:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 221 states have (on average 1.3936651583710407) internal successors, (308), 234 states have internal predecessors, (308), 23 states have call successors, (23), 11 states have call predecessors, (23), 22 states have return successors, (67), 21 states have call predecessors, (67), 22 states have call successors, (67) [2021-11-19 04:08:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 398 transitions. [2021-11-19 04:08:10,224 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 398 transitions. Word has length 72 [2021-11-19 04:08:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:10,224 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 398 transitions. [2021-11-19 04:08:10,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 398 transitions. [2021-11-19 04:08:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:08:10,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:10,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:10,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:10,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:10,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-11-19 04:08:10,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:10,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132236650] [2021-11-19 04:08:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:10,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 04:08:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:08:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:08:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:08:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 04:08:10,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132236650] [2021-11-19 04:08:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132236650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:10,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967853459] [2021-11-19 04:08:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:10,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:10,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:10,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:08:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:08:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:08:10,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967853459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:10,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:10,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-19 04:08:10,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061975004] [2021-11-19 04:08:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:10,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:08:10,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:08:10,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:08:10,965 INFO L87 Difference]: Start difference. First operand 267 states and 398 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:10,996 INFO L93 Difference]: Finished difference Result 430 states and 669 transitions. [2021-11-19 04:08:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:08:10,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-19 04:08:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:11,000 INFO L225 Difference]: With dead ends: 430 [2021-11-19 04:08:11,000 INFO L226 Difference]: Without dead ends: 234 [2021-11-19 04:08:11,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:08:11,003 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:11,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:08:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-19 04:08:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2021-11-19 04:08:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 151 states have (on average 1.3708609271523178) internal successors, (207), 159 states have internal predecessors, (207), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (44), 17 states have call predecessors, (44), 18 states have call successors, (44) [2021-11-19 04:08:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 270 transitions. [2021-11-19 04:08:11,026 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 270 transitions. Word has length 73 [2021-11-19 04:08:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 270 transitions. [2021-11-19 04:08:11,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:08:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 270 transitions. [2021-11-19 04:08:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 04:08:11,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:11,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:11,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:11,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:11,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2021-11-19 04:08:11,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:11,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442656383] [2021-11-19 04:08:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:11,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:08:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:08:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:08:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:08:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:08:11,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:11,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442656383] [2021-11-19 04:08:11,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442656383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:11,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988568214] [2021-11-19 04:08:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:11,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:11,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:11,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:08:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:08:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:08:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:08:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:08:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-19 04:08:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:08:14,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:15,527 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 214 treesize of output 202 [2021-11-19 04:08:15,769 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 860 treesize of output 848 [2021-11-19 04:08:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:08:16,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988568214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:16,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:16,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 13] total 31 [2021-11-19 04:08:16,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447749317] [2021-11-19 04:08:16,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:16,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:08:16,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:16,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:08:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:08:16,357 INFO L87 Difference]: Start difference. First operand 185 states and 270 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-19 04:08:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:18,081 INFO L93 Difference]: Finished difference Result 437 states and 804 transitions. [2021-11-19 04:08:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:08:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) Word has length 81 [2021-11-19 04:08:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:18,093 INFO L225 Difference]: With dead ends: 437 [2021-11-19 04:08:18,095 INFO L226 Difference]: Without dead ends: 301 [2021-11-19 04:08:18,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:08:18,099 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 93 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:18,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1619 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 565 Invalid, 0 Unknown, 280 Unchecked, 0.7s Time] [2021-11-19 04:08:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-19 04:08:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 206. [2021-11-19 04:08:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 177 states have internal predecessors, (226), 21 states have call successors, (21), 9 states have call predecessors, (21), 15 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-19 04:08:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 293 transitions. [2021-11-19 04:08:18,157 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 293 transitions. Word has length 81 [2021-11-19 04:08:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:18,158 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 293 transitions. [2021-11-19 04:08:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 28 states have internal predecessors, (128), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-19 04:08:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 293 transitions. [2021-11-19 04:08:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:08:18,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:18,162 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:18,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:18,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:18,388 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2021-11-19 04:08:18,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:18,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389780183] [2021-11-19 04:08:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:18,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:08:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:08:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:08:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:08:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:08:18,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389780183] [2021-11-19 04:08:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389780183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:18,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420498733] [2021-11-19 04:08:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:18,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:18,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:18,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:08:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:18,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:08:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:18,878 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:08:18,878 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:08:18,898 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:08:18,899 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:08:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:08:24,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 04:08:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420498733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:25,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:25,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 8] total 24 [2021-11-19 04:08:25,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984195764] [2021-11-19 04:08:25,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:25,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:08:25,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:08:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=481, Unknown=1, NotChecked=0, Total=552 [2021-11-19 04:08:25,330 INFO L87 Difference]: Start difference. First operand 206 states and 293 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 04:08:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:25,720 INFO L93 Difference]: Finished difference Result 474 states and 715 transitions. [2021-11-19 04:08:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:08:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 83 [2021-11-19 04:08:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:25,725 INFO L225 Difference]: With dead ends: 474 [2021-11-19 04:08:25,726 INFO L226 Difference]: Without dead ends: 343 [2021-11-19 04:08:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=105, Invalid=764, Unknown=1, NotChecked=0, Total=870 [2021-11-19 04:08:25,728 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 102 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:25,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 953 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-11-19 04:08:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-19 04:08:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 321. [2021-11-19 04:08:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 266 states have (on average 1.3233082706766917) internal successors, (352), 284 states have internal predecessors, (352), 31 states have call successors, (31), 11 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-19 04:08:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 471 transitions. [2021-11-19 04:08:25,762 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 471 transitions. Word has length 83 [2021-11-19 04:08:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:25,763 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 471 transitions. [2021-11-19 04:08:25,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 6 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 04:08:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 471 transitions. [2021-11-19 04:08:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:08:25,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:25,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:25,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:08:25,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-19 04:08:25,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1609738742, now seen corresponding path program 1 times [2021-11-19 04:08:25,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:25,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019357879] [2021-11-19 04:08:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:25,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:08:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:08:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:08:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:08:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:08:26,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:26,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019357879] [2021-11-19 04:08:26,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019357879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:26,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209912597] [2021-11-19 04:08:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:26,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:26,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:26,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:08:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:08:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:08:26,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:26,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209912597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:26,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:26,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 04:08:26,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139240831] [2021-11-19 04:08:26,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:26,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:08:26,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:08:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:08:26,411 INFO L87 Difference]: Start difference. First operand 321 states and 471 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:26,455 INFO L93 Difference]: Finished difference Result 479 states and 719 transitions. [2021-11-19 04:08:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:08:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-11-19 04:08:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:26,459 INFO L225 Difference]: With dead ends: 479 [2021-11-19 04:08:26,459 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 04:08:26,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:08:26,465 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:26,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:08:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 04:08:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-11-19 04:08:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.3065134099616857) internal successors, (341), 279 states have internal predecessors, (341), 31 states have call successors, (31), 11 states have call predecessors, (31), 23 states have return successors, (88), 25 states have call predecessors, (88), 30 states have call successors, (88) [2021-11-19 04:08:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 460 transitions. [2021-11-19 04:08:26,511 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 460 transitions. Word has length 83 [2021-11-19 04:08:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:26,511 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 460 transitions. [2021-11-19 04:08:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 460 transitions. [2021-11-19 04:08:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:08:26,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:26,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:26,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:26,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:08:26,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -723653896, now seen corresponding path program 1 times [2021-11-19 04:08:26,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:26,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943405435] [2021-11-19 04:08:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:26,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:08:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:08:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:08:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:08:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 04:08:26,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:26,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943405435] [2021-11-19 04:08:26,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943405435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:26,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574067625] [2021-11-19 04:08:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:26,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:27,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:27,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:08:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:08:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:08:27,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:27,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574067625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:27,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:27,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-19 04:08:27,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916781125] [2021-11-19 04:08:27,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:27,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:08:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:08:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:08:27,274 INFO L87 Difference]: Start difference. First operand 316 states and 460 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:27,314 INFO L93 Difference]: Finished difference Result 450 states and 674 transitions. [2021-11-19 04:08:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:08:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-11-19 04:08:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:27,331 INFO L225 Difference]: With dead ends: 450 [2021-11-19 04:08:27,331 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 04:08:27,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:08:27,336 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:27,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:08:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 04:08:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-11-19 04:08:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 160 states have internal predecessors, (181), 21 states have call successors, (21), 10 states have call predecessors, (21), 16 states have return successors, (43), 17 states have call predecessors, (43), 20 states have call successors, (43) [2021-11-19 04:08:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-19 04:08:27,363 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 83 [2021-11-19 04:08:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:27,364 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-19 04:08:27,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-19 04:08:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:08:27,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:27,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:27,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:27,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:08:27,584 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash 340955510, now seen corresponding path program 1 times [2021-11-19 04:08:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:27,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945613223] [2021-11-19 04:08:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:08:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:08:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:08:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:08:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:08:27,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:27,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945613223] [2021-11-19 04:08:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945613223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:27,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397830242] [2021-11-19 04:08:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:27,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:27,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:27,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:08:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:08:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:08:27,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:27,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397830242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:27,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:27,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 04:08:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365279446] [2021-11-19 04:08:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:27,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:08:27,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:08:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:08:27,998 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:28,055 INFO L93 Difference]: Finished difference Result 316 states and 424 transitions. [2021-11-19 04:08:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:08:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-11-19 04:08:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:28,062 INFO L225 Difference]: With dead ends: 316 [2021-11-19 04:08:28,062 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 04:08:28,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:08:28,065 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:28,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 245 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:08:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 04:08:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-11-19 04:08:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 135 states have internal predecessors, (152), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) [2021-11-19 04:08:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 208 transitions. [2021-11-19 04:08:28,097 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 208 transitions. Word has length 83 [2021-11-19 04:08:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:28,098 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 208 transitions. [2021-11-19 04:08:28,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:08:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 208 transitions. [2021-11-19 04:08:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:08:28,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:28,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:28,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:28,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2021-11-19 04:08:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:28,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183505376] [2021-11-19 04:08:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:08:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-19 04:08:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 04:08:28,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:28,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183505376] [2021-11-19 04:08:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183505376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:28,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786832841] [2021-11-19 04:08:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:28,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:28,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:08:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 04:08:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:28,762 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:08:28,763 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:08:28,783 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:08:28,784 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:08:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:08:36,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:08:37,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786832841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:37,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:37,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 10] total 27 [2021-11-19 04:08:37,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777309358] [2021-11-19 04:08:37,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:37,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:08:37,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:08:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:08:37,573 INFO L87 Difference]: Start difference. First operand 162 states and 208 transitions. Second operand has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-19 04:08:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:39,363 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2021-11-19 04:08:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:08:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 84 [2021-11-19 04:08:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:39,366 INFO L225 Difference]: With dead ends: 338 [2021-11-19 04:08:39,367 INFO L226 Difference]: Without dead ends: 228 [2021-11-19 04:08:39,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:08:39,369 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 142 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:39,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1171 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2021-11-19 04:08:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-19 04:08:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2021-11-19 04:08:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.2298136645962734) internal successors, (198), 168 states have internal predecessors, (198), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-19 04:08:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 246 transitions. [2021-11-19 04:08:39,389 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 246 transitions. Word has length 84 [2021-11-19 04:08:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:39,389 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 246 transitions. [2021-11-19 04:08:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.961538461538462) internal successors, (129), 23 states have internal predecessors, (129), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-19 04:08:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 246 transitions. [2021-11-19 04:08:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 04:08:39,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:39,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:39,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:39,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:39,612 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1135728258, now seen corresponding path program 1 times [2021-11-19 04:08:39,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:39,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610005151] [2021-11-19 04:08:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:39,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:08:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:08:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:08:39,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:39,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610005151] [2021-11-19 04:08:39,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610005151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:39,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559367266] [2021-11-19 04:08:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:39,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:39,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:39,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:08:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:08:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:08:40,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559367266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:40,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:40,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-19 04:08:40,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959582934] [2021-11-19 04:08:40,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:40,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:08:40,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:08:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:08:40,397 INFO L87 Difference]: Start difference. First operand 198 states and 246 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:08:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:40,615 INFO L93 Difference]: Finished difference Result 291 states and 362 transitions. [2021-11-19 04:08:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:08:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-19 04:08:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:40,618 INFO L225 Difference]: With dead ends: 291 [2021-11-19 04:08:40,618 INFO L226 Difference]: Without dead ends: 200 [2021-11-19 04:08:40,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:08:40,620 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 111 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:40,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 294 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:08:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-19 04:08:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-11-19 04:08:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 168 states have internal predecessors, (195), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-19 04:08:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2021-11-19 04:08:40,637 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 86 [2021-11-19 04:08:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:40,638 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2021-11-19 04:08:40,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:08:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2021-11-19 04:08:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 04:08:40,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:40,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:40,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:40,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:08:40,868 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash -919871633, now seen corresponding path program 1 times [2021-11-19 04:08:40,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:40,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097356867] [2021-11-19 04:08:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:40,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:40,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:40,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:40,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:08:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:08:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:08:41,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:41,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097356867] [2021-11-19 04:08:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097356867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:41,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688138471] [2021-11-19 04:08:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:41,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:41,195 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:41,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:08:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:08:41,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:08:41,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:08:41,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688138471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:08:41,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:08:41,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-19 04:08:41,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062690119] [2021-11-19 04:08:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:08:41,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:08:41,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:41,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:08:41,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:08:41,615 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:08:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:41,892 INFO L93 Difference]: Finished difference Result 301 states and 373 transitions. [2021-11-19 04:08:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:08:41,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2021-11-19 04:08:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:41,894 INFO L225 Difference]: With dead ends: 301 [2021-11-19 04:08:41,894 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 04:08:41,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:08:41,896 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 143 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:41,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:08:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 04:08:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 195. [2021-11-19 04:08:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 165 states have internal predecessors, (189), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (29), 16 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-19 04:08:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2021-11-19 04:08:41,913 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 88 [2021-11-19 04:08:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:41,914 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2021-11-19 04:08:41,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:08:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2021-11-19 04:08:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 04:08:41,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:41,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:41,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:42,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:08:42,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1613305023, now seen corresponding path program 1 times [2021-11-19 04:08:42,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:42,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302652487] [2021-11-19 04:08:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:42,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 04:08:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:08:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:08:42,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:42,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302652487] [2021-11-19 04:08:42,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302652487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:42,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792938361] [2021-11-19 04:08:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:42,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:42,326 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:42,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:08:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:08:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:08:42,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:08:43,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792938361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:43,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:43,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-11-19 04:08:43,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852563121] [2021-11-19 04:08:43,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:43,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:08:43,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:08:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:08:43,178 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 04:08:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:43,396 INFO L93 Difference]: Finished difference Result 289 states and 358 transitions. [2021-11-19 04:08:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:08:43,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2021-11-19 04:08:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:43,399 INFO L225 Difference]: With dead ends: 289 [2021-11-19 04:08:43,399 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 04:08:43,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:08:43,401 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 10 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:43,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1220 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:08:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 04:08:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-11-19 04:08:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 159 states have internal predecessors, (182), 19 states have call successors, (19), 13 states have call predecessors, (19), 15 states have return successors, (27), 15 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-19 04:08:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2021-11-19 04:08:43,422 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 97 [2021-11-19 04:08:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:43,422 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2021-11-19 04:08:43,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 04:08:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2021-11-19 04:08:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:08:43,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:43,424 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:43,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:43,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:08:43,642 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2021-11-19 04:08:43,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:43,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525164895] [2021-11-19 04:08:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:43,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:43,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:44,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:08:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:08:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 04:08:44,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:44,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525164895] [2021-11-19 04:08:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525164895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:44,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154257539] [2021-11-19 04:08:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:44,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:44,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:44,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:08:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 04:08:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:44,410 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 04:08:44,410 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 1 case distinctions, treesize of input 14 treesize of output 15 [2021-11-19 04:08:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:08:46,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:08:46,897 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 96 treesize of output 90 [2021-11-19 04:08:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:08:47,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154257539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:08:47,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:08:47,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 30 [2021-11-19 04:08:47,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328963260] [2021-11-19 04:08:47,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:08:47,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:08:47,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:08:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:08:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:08:47,075 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-19 04:08:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:08:48,041 INFO L93 Difference]: Finished difference Result 389 states and 478 transitions. [2021-11-19 04:08:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 04:08:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) Word has length 100 [2021-11-19 04:08:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:08:48,045 INFO L225 Difference]: With dead ends: 389 [2021-11-19 04:08:48,045 INFO L226 Difference]: Without dead ends: 325 [2021-11-19 04:08:48,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=342, Invalid=2310, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:08:48,048 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 110 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:08:48,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1124 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 232 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-11-19 04:08:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-19 04:08:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 294. [2021-11-19 04:08:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 239 states have (on average 1.200836820083682) internal successors, (287), 248 states have internal predecessors, (287), 28 states have call successors, (28), 20 states have call predecessors, (28), 26 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-11-19 04:08:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 357 transitions. [2021-11-19 04:08:48,077 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 357 transitions. Word has length 100 [2021-11-19 04:08:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:08:48,077 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 357 transitions. [2021-11-19 04:08:48,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 28 states have internal predecessors, (152), 14 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-19 04:08:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 357 transitions. [2021-11-19 04:08:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:08:48,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:08:48,080 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:08:48,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:08:48,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:08:48,296 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:08:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:08:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2021-11-19 04:08:48,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:08:48,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087842461] [2021-11-19 04:08:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:48,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:08:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:08:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:08:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:08:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:08:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:08:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:08:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:08:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:08:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:08:48,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:08:48,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087842461] [2021-11-19 04:08:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087842461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:08:48,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590871291] [2021-11-19 04:08:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:08:48,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:08:48,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:08:48,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:08:48,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:08:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:08:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 04:08:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:08:49,187 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:08:49,188 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:08:49,216 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:08:49,216 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:08:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:08:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:09:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590871291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:09:00,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:09:00,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 12] total 33 [2021-11-19 04:09:00,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272270765] [2021-11-19 04:09:00,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:09:00,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:09:00,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:09:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:09:00,206 INFO L87 Difference]: Start difference. First operand 294 states and 357 transitions. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-19 04:09:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:01,511 INFO L93 Difference]: Finished difference Result 449 states and 540 transitions. [2021-11-19 04:09:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:09:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 100 [2021-11-19 04:09:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:01,515 INFO L225 Difference]: With dead ends: 449 [2021-11-19 04:09:01,516 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 04:09:01,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:09:01,519 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 167 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:01,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1088 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-11-19 04:09:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 04:09:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 258. [2021-11-19 04:09:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 211 states have (on average 1.2085308056872037) internal successors, (255), 219 states have internal predecessors, (255), 23 states have call successors, (23), 17 states have call predecessors, (23), 23 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2021-11-19 04:09:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2021-11-19 04:09:01,559 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 100 [2021-11-19 04:09:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:01,559 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2021-11-19 04:09:01,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 30 states have internal predecessors, (155), 13 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-19 04:09:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2021-11-19 04:09:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:09:01,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:01,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:09:01,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:01,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:01,776 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2021-11-19 04:09:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:01,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780695365] [2021-11-19 04:09:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:01,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:09:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:01,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:09:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:09:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:09:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:09:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:09:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:09:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:09:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:09:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 04:09:02,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:02,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780695365] [2021-11-19 04:09:02,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780695365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:02,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14001044] [2021-11-19 04:09:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:02,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:02,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:02,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:02,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:09:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 04:09:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:02,444 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-19 04:09:02,444 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-19 04:09:16,516 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:09:42,858 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:09:53,003 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:03,225 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:09,398 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:19,590 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:29,692 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:47,910 WARN L227 SmtUtils]: Spent 18.05s on a formula simplification. DAG size of input: 33 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:56,400 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:10:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:10:58,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:11:13,389 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 177 treesize of output 169 [2021-11-19 04:11:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:11:13,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14001044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:11:13,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:11:13,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 37 [2021-11-19 04:11:13,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153132761] [2021-11-19 04:11:13,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:11:13,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:11:13,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:11:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:11:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1169, Unknown=18, NotChecked=0, Total=1332 [2021-11-19 04:11:13,589 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-19 04:11:23,715 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:11:33,796 WARN L227 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:11:43,839 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:11:56,417 WARN L227 SmtUtils]: Spent 12.56s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:12:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:12:11,171 INFO L93 Difference]: Finished difference Result 559 states and 674 transitions. [2021-11-19 04:12:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:12:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 100 [2021-11-19 04:12:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:12:11,175 INFO L225 Difference]: With dead ends: 559 [2021-11-19 04:12:11,175 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 04:12:11,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 186.0s TimeCoverageRelationStatistics Valid=299, Invalid=2538, Unknown=25, NotChecked=0, Total=2862 [2021-11-19 04:12:11,178 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 146 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:12:11,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2212 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 485 Unchecked, 0.2s Time] [2021-11-19 04:12:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 04:12:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 310. [2021-11-19 04:12:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 253 states have (on average 1.2015810276679841) internal successors, (304), 260 states have internal predecessors, (304), 28 states have call successors, (28), 20 states have call predecessors, (28), 28 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2021-11-19 04:12:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 373 transitions. [2021-11-19 04:12:11,220 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 373 transitions. Word has length 100 [2021-11-19 04:12:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:12:11,221 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 373 transitions. [2021-11-19 04:12:11,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 35 states have internal predecessors, (161), 15 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2021-11-19 04:12:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 373 transitions. [2021-11-19 04:12:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:12:11,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:12:11,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:11,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:12:11,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:12:11,440 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:12:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:12:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2021-11-19 04:12:11,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:12:11,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745781149] [2021-11-19 04:12:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:11,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:12:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:12:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:12:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:12:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:12:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:12:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:12:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:12:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:12:11,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:12:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745781149] [2021-11-19 04:12:11,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745781149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:12:11,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570086650] [2021-11-19 04:12:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:11,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:12:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:12:11,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:12:11,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:12:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:12:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:12:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 04:12:12,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:12:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570086650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:12:12,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:12:12,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-19 04:12:12,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859492179] [2021-11-19 04:12:12,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:12:12,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:12:12,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:12:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:12:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:12:12,147 INFO L87 Difference]: Start difference. First operand 310 states and 373 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:12:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:12:12,283 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2021-11-19 04:12:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:12:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2021-11-19 04:12:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:12:12,286 INFO L225 Difference]: With dead ends: 375 [2021-11-19 04:12:12,286 INFO L226 Difference]: Without dead ends: 301 [2021-11-19 04:12:12,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:12:12,288 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:12:12,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 248 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:12:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-19 04:12:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 294. [2021-11-19 04:12:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 238 states have (on average 1.1932773109243697) internal successors, (284), 245 states have internal predecessors, (284), 28 states have call successors, (28), 20 states have call predecessors, (28), 27 states have return successors, (39), 28 states have call predecessors, (39), 27 states have call successors, (39) [2021-11-19 04:12:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 351 transitions. [2021-11-19 04:12:12,325 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 351 transitions. Word has length 100 [2021-11-19 04:12:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:12:12,325 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 351 transitions. [2021-11-19 04:12:12,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:12:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 351 transitions. [2021-11-19 04:12:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 04:12:12,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:12:12,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:12:12,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:12:12,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-19 04:12:12,552 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:12:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:12:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 855153545, now seen corresponding path program 1 times [2021-11-19 04:12:12,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:12:12,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961613567] [2021-11-19 04:12:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:12,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:12:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:12:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:12:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:12:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:12:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:12:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:12:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:12:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-19 04:12:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:12:12,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:12:12,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961613567] [2021-11-19 04:12:12,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961613567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:12:12,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775827190] [2021-11-19 04:12:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:12,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:12:12,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:12:12,912 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:12:12,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 04:12:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-19 04:12:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:12:13,143 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:12:13,143 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:12:13,166 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:12:13,166 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:12:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:12:26,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:12:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 04:12:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775827190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:12:28,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:12:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 14] total 43 [2021-11-19 04:12:28,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227303397] [2021-11-19 04:12:28,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:12:28,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 04:12:28,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:12:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 04:12:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:12:28,061 INFO L87 Difference]: Start difference. First operand 294 states and 351 transitions. Second operand has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-19 04:12:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:12:34,201 INFO L93 Difference]: Finished difference Result 523 states and 669 transitions. [2021-11-19 04:12:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 04:12:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) Word has length 110 [2021-11-19 04:12:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:12:34,205 INFO L225 Difference]: With dead ends: 523 [2021-11-19 04:12:34,205 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 04:12:34,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=346, Invalid=3559, Unknown=1, NotChecked=0, Total=3906 [2021-11-19 04:12:34,209 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 160 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:12:34,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2003 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1734 Invalid, 0 Unknown, 346 Unchecked, 1.7s Time] [2021-11-19 04:12:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 04:12:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 321. [2021-11-19 04:12:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 266 states have internal predecessors, (311), 30 states have call successors, (30), 21 states have call predecessors, (30), 30 states have return successors, (42), 33 states have call predecessors, (42), 29 states have call successors, (42) [2021-11-19 04:12:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 383 transitions. [2021-11-19 04:12:34,266 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 383 transitions. Word has length 110 [2021-11-19 04:12:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:12:34,267 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 383 transitions. [2021-11-19 04:12:34,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.8) internal successors, (192), 41 states have internal predecessors, (192), 18 states have call successors, (30), 4 states have call predecessors, (30), 10 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2021-11-19 04:12:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 383 transitions. [2021-11-19 04:12:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 04:12:34,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:12:34,268 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 04:12:34,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:12:34,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:12:34,469 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:12:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:12:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2021-11-19 04:12:34,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:12:34,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966176912] [2021-11-19 04:12:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:34,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:12:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:12:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:12:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:12:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:12:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:34,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:12:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:12:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:12:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:12:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:12:35,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:12:35,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966176912] [2021-11-19 04:12:35,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966176912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:12:35,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778552178] [2021-11-19 04:12:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:12:35,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:12:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:12:35,479 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:12:35,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 04:12:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:12:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-19 04:12:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:12:35,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-19 04:12:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-19 04:12:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:12:39,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:12:50,715 WARN L227 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:13:01,044 WARN L227 SmtUtils]: Spent 10.20s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:13:02,617 INFO L354 Elim1Store]: treesize reduction 331, result has 32.4 percent of original size [2021-11-19 04:13:02,617 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 1587 treesize of output 1585 [2021-11-19 04:13:02,983 INFO L354 Elim1Store]: treesize reduction 453, result has 25.0 percent of original size [2021-11-19 04:13:02,984 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 9 new quantified variables, introduced 29 case distinctions, treesize of input 4774 treesize of output 4504 [2021-11-19 04:13:03,293 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-19 04:13:03,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3764 treesize of output 3676 [2021-11-19 04:13:03,451 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-11-19 04:13:03,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3672 treesize of output 3532 [2021-11-19 04:13:03,725 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 8 treesize of output 4 [2021-11-19 04:13:03,818 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:13:03,937 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:13:04,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:13:04,559 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 19 treesize of output 23 [2021-11-19 04:13:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:06,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:06,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:06,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:06,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:06,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:06,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:07,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:07,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:07,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:07,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-19 04:13:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:08,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:08,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:08,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:13:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:08,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2021-11-19 04:13:10,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:13:10,763 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 19 treesize of output 23 [2021-11-19 04:13:13,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:13:13,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-19 04:13:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:13:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-19 04:13:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 04:13:13,375 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 6 treesize of output 4 [2021-11-19 04:13:13,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:13,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-19 04:13:15,000 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 6 treesize of output 4 [2021-11-19 04:13:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:15,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-11-19 04:13:15,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:13:15,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:13:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 162 [2021-11-19 04:13:16,200 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 8 treesize of output 6 [2021-11-19 04:13:16,556 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 8 treesize of output 6 [2021-11-19 04:13:16,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:13:16,678 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 87 treesize of output 85 [2021-11-19 04:13:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 46 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:13:17,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778552178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:13:17,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:13:17,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 62 [2021-11-19 04:13:17,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904547832] [2021-11-19 04:13:17,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:13:17,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 04:13:17,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:13:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 04:13:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:13:17,067 INFO L87 Difference]: Start difference. First operand 321 states and 383 transitions. Second operand has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-19 04:13:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:13:21,136 INFO L93 Difference]: Finished difference Result 743 states and 953 transitions. [2021-11-19 04:13:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-19 04:13:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) Word has length 113 [2021-11-19 04:13:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:13:21,146 INFO L225 Difference]: With dead ends: 743 [2021-11-19 04:13:21,146 INFO L226 Difference]: Without dead ends: 683 [2021-11-19 04:13:21,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 04:13:21,157 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:13:21,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1901 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1542 Invalid, 0 Unknown, 381 Unchecked, 2.1s Time] [2021-11-19 04:13:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-19 04:13:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 522. [2021-11-19 04:13:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 431 states have internal predecessors, (503), 49 states have call successors, (49), 30 states have call predecessors, (49), 52 states have return successors, (85), 60 states have call predecessors, (85), 48 states have call successors, (85) [2021-11-19 04:13:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 637 transitions. [2021-11-19 04:13:21,253 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 637 transitions. Word has length 113 [2021-11-19 04:13:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:13:21,253 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 637 transitions. [2021-11-19 04:13:21,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 3.2203389830508473) internal successors, (190), 54 states have internal predecessors, (190), 20 states have call successors, (26), 3 states have call predecessors, (26), 14 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-19 04:13:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 637 transitions. [2021-11-19 04:13:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 04:13:21,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:13:21,256 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 04:13:21,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:13:21,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:13:21,476 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:13:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:13:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1807516699, now seen corresponding path program 1 times [2021-11-19 04:13:21,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:13:21,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855816555] [2021-11-19 04:13:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:13:21,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:13:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:13:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:13:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:13:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:13:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:13:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:13:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:13:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:21,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:13:22,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:13:22,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855816555] [2021-11-19 04:13:22,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855816555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:13:22,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082272373] [2021-11-19 04:13:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:13:22,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:13:22,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:13:22,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:13:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 04:13:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:22,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-19 04:13:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:13:22,296 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:13:22,296 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 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-19 04:13:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:13:33,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:13:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 157 [2021-11-19 04:13:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:13:34,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082272373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:13:34,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:13:34,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 20] total 49 [2021-11-19 04:13:34,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329677551] [2021-11-19 04:13:34,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:13:34,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:13:34,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:13:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:13:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:13:34,854 INFO L87 Difference]: Start difference. First operand 522 states and 637 transitions. Second operand has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-19 04:13:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:13:59,122 INFO L93 Difference]: Finished difference Result 1533 states and 2162 transitions. [2021-11-19 04:13:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-19 04:13:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) Word has length 113 [2021-11-19 04:13:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:13:59,133 INFO L225 Difference]: With dead ends: 1533 [2021-11-19 04:13:59,133 INFO L226 Difference]: Without dead ends: 1250 [2021-11-19 04:13:59,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2967 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=921, Invalid=8381, Unknown=10, NotChecked=0, Total=9312 [2021-11-19 04:13:59,140 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 484 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:13:59,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 2460 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1326 Invalid, 0 Unknown, 1561 Unchecked, 1.2s Time] [2021-11-19 04:13:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-19 04:13:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 836. [2021-11-19 04:13:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 671 states have (on average 1.2056631892697467) internal successors, (809), 689 states have internal predecessors, (809), 78 states have call successors, (78), 42 states have call predecessors, (78), 86 states have return successors, (179), 104 states have call predecessors, (179), 77 states have call successors, (179) [2021-11-19 04:13:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1066 transitions. [2021-11-19 04:13:59,368 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1066 transitions. Word has length 113 [2021-11-19 04:13:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:13:59,369 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1066 transitions. [2021-11-19 04:13:59,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.816326530612245) internal successors, (187), 47 states have internal predecessors, (187), 18 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (25), 15 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-19 04:13:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1066 transitions. [2021-11-19 04:13:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 04:13:59,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:13:59,373 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:13:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 04:13:59,592 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:13:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:13:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1476333347, now seen corresponding path program 1 times [2021-11-19 04:13:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:13:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144209401] [2021-11-19 04:13:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:13:59,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:13:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:13:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:13:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:13:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:13:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:13:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:13:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:13:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:13:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:13:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:13:59,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:13:59,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144209401] [2021-11-19 04:13:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144209401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:13:59,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164057197] [2021-11-19 04:13:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:13:59,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:13:59,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:13:59,976 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:13:59,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 04:14:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:14:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:14:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:14:00,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:14:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164057197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:14:00,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:14:00,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-19 04:14:00,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485171965] [2021-11-19 04:14:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:14:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:14:00,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:14:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:14:00,550 INFO L87 Difference]: Start difference. First operand 836 states and 1066 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:14:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:01,015 INFO L93 Difference]: Finished difference Result 1931 states and 2552 transitions. [2021-11-19 04:14:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:14:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-11-19 04:14:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:01,021 INFO L225 Difference]: With dead ends: 1931 [2021-11-19 04:14:01,021 INFO L226 Difference]: Without dead ends: 899 [2021-11-19 04:14:01,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:14:01,026 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:01,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 423 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:14:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-19 04:14:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 795. [2021-11-19 04:14:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 635 states have (on average 1.1811023622047243) internal successors, (750), 661 states have internal predecessors, (750), 74 states have call successors, (74), 42 states have call predecessors, (74), 85 states have return successors, (147), 91 states have call predecessors, (147), 73 states have call successors, (147) [2021-11-19 04:14:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 971 transitions. [2021-11-19 04:14:01,167 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 971 transitions. Word has length 113 [2021-11-19 04:14:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:01,168 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 971 transitions. [2021-11-19 04:14:01,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:14:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 971 transitions. [2021-11-19 04:14:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 04:14:01,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:01,171 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-19 04:14:01,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 04:14:01,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:14:01,394 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:01,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2021-11-19 04:14:01,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:01,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227373531] [2021-11-19 04:14:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:01,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:14:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:14:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:14:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:14:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:14:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:14:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:14:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-19 04:14:01,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:14:01,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227373531] [2021-11-19 04:14:01,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227373531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:14:01,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:14:01,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:14:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173686292] [2021-11-19 04:14:01,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:14:01,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:14:01,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:14:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:14:01,638 INFO L87 Difference]: Start difference. First operand 795 states and 971 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:14:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:01,824 INFO L93 Difference]: Finished difference Result 855 states and 1035 transitions. [2021-11-19 04:14:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:14:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 116 [2021-11-19 04:14:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:01,832 INFO L225 Difference]: With dead ends: 855 [2021-11-19 04:14:01,832 INFO L226 Difference]: Without dead ends: 853 [2021-11-19 04:14:01,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:14:01,834 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:01,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:14:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-19 04:14:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 812. [2021-11-19 04:14:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 647 states have (on average 1.17774343122102) internal successors, (762), 676 states have internal predecessors, (762), 75 states have call successors, (75), 43 states have call predecessors, (75), 89 states have return successors, (154), 92 states have call predecessors, (154), 74 states have call successors, (154) [2021-11-19 04:14:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 991 transitions. [2021-11-19 04:14:01,984 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 991 transitions. Word has length 116 [2021-11-19 04:14:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:01,985 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 991 transitions. [2021-11-19 04:14:01,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:14:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 991 transitions. [2021-11-19 04:14:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 04:14:01,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:01,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:14:01,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:14:01,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 509544598, now seen corresponding path program 1 times [2021-11-19 04:14:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:01,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966666215] [2021-11-19 04:14:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:01,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:14:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:14:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:14:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:14:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:14:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:14:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:14:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 04:14:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 04:14:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 04:14:02,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:14:02,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966666215] [2021-11-19 04:14:02,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966666215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:14:02,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119861192] [2021-11-19 04:14:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:02,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:14:02,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:14:02,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:14:02,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 04:14:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 04:14:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:14:02,502 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:14:02,502 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:14:02,530 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:14:02,530 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:14:25,641 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:14:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:14:30,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:14:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 11 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 04:14:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119861192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:14:31,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:14:31,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 12] total 34 [2021-11-19 04:14:31,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89082974] [2021-11-19 04:14:31,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:14:31,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:14:31,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:14:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=998, Unknown=5, NotChecked=0, Total=1122 [2021-11-19 04:14:31,537 INFO L87 Difference]: Start difference. First operand 812 states and 991 transitions. Second operand has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-19 04:14:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:48,594 INFO L93 Difference]: Finished difference Result 1494 states and 1825 transitions. [2021-11-19 04:14:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:14:48,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 120 [2021-11-19 04:14:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:48,603 INFO L225 Difference]: With dead ends: 1494 [2021-11-19 04:14:48,603 INFO L226 Difference]: Without dead ends: 1265 [2021-11-19 04:14:48,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=364, Invalid=3530, Unknown=12, NotChecked=0, Total=3906 [2021-11-19 04:14:48,608 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 132 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:48,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1590 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 360 Invalid, 0 Unknown, 404 Unchecked, 0.3s Time] [2021-11-19 04:14:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-11-19 04:14:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1029. [2021-11-19 04:14:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 821 states have (on average 1.1705237515225335) internal successors, (961), 860 states have internal predecessors, (961), 91 states have call successors, (91), 59 states have call predecessors, (91), 116 states have return successors, (195), 109 states have call predecessors, (195), 90 states have call successors, (195) [2021-11-19 04:14:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1247 transitions. [2021-11-19 04:14:48,840 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1247 transitions. Word has length 120 [2021-11-19 04:14:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:48,841 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1247 transitions. [2021-11-19 04:14:48,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 5.0625) internal successors, (162), 33 states have internal predecessors, (162), 14 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-19 04:14:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1247 transitions. [2021-11-19 04:14:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 04:14:48,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:48,845 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:14:48,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 04:14:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:14:49,068 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash 610448605, now seen corresponding path program 1 times [2021-11-19 04:14:49,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:49,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449554620] [2021-11-19 04:14:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:49,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:14:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:14:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:14:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:14:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:14:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:14:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:14:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-19 04:14:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 04:14:49,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:14:49,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449554620] [2021-11-19 04:14:49,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449554620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:14:49,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:14:49,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:14:49,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499496864] [2021-11-19 04:14:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:14:49,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:14:49,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:14:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:14:49,306 INFO L87 Difference]: Start difference. First operand 1029 states and 1247 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:14:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:49,519 INFO L93 Difference]: Finished difference Result 1035 states and 1252 transitions. [2021-11-19 04:14:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:14:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-11-19 04:14:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:49,525 INFO L225 Difference]: With dead ends: 1035 [2021-11-19 04:14:49,525 INFO L226 Difference]: Without dead ends: 1033 [2021-11-19 04:14:49,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:14:49,527 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:49,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 298 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:14:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-11-19 04:14:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1033. [2021-11-19 04:14:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 824 states have (on average 1.1699029126213591) internal successors, (964), 863 states have internal predecessors, (964), 91 states have call successors, (91), 60 states have call predecessors, (91), 117 states have return successors, (195), 109 states have call predecessors, (195), 90 states have call successors, (195) [2021-11-19 04:14:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1250 transitions. [2021-11-19 04:14:49,721 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1250 transitions. Word has length 122 [2021-11-19 04:14:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:49,721 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1250 transitions. [2021-11-19 04:14:49,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:14:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1250 transitions. [2021-11-19 04:14:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 04:14:49,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:49,726 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:14:49,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 04:14:49,727 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash 409153948, now seen corresponding path program 2 times [2021-11-19 04:14:49,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:49,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806225154] [2021-11-19 04:14:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:49,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:14:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:14:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:14:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:14:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:14:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:14:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:49,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:14:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:14:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-19 04:14:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 04:14:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-19 04:14:50,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:14:50,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806225154] [2021-11-19 04:14:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806225154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:14:50,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319449544] [2021-11-19 04:14:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:14:50,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:14:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:14:50,134 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:14:50,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 04:14:50,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:14:50,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:14:50,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:14:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:14:52,648 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0)))) is different from true [2021-11-19 04:14:54,748 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0)))) is different from true [2021-11-19 04:14:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 90 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 7 not checked. [2021-11-19 04:14:55,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:14:56,114 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 04:14:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 04:14:56,122 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 04:14:56,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 04:14:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 04:14:56,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319449544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:14:56,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:14:56,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 27 [2021-11-19 04:14:56,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368987226] [2021-11-19 04:14:56,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:14:56,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:14:56,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:14:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2021-11-19 04:14:56,234 INFO L87 Difference]: Start difference. First operand 1033 states and 1250 transitions. Second operand has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 04:14:58,531 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_32|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_30|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_31|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_29|) 0))))) is different from true [2021-11-19 04:14:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:59,366 INFO L93 Difference]: Finished difference Result 1175 states and 1479 transitions. [2021-11-19 04:14:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:14:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 122 [2021-11-19 04:14:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:59,374 INFO L225 Difference]: With dead ends: 1175 [2021-11-19 04:14:59,374 INFO L226 Difference]: Without dead ends: 1107 [2021-11-19 04:14:59,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 250 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=232, Invalid=1417, Unknown=3, NotChecked=240, Total=1892 [2021-11-19 04:14:59,377 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 152 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:59,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 781 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 490 Invalid, 0 Unknown, 378 Unchecked, 0.4s Time] [2021-11-19 04:14:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-19 04:14:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 760. [2021-11-19 04:14:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 606 states have (on average 1.1716171617161717) internal successors, (710), 633 states have internal predecessors, (710), 68 states have call successors, (68), 46 states have call predecessors, (68), 85 states have return successors, (134), 80 states have call predecessors, (134), 67 states have call successors, (134) [2021-11-19 04:14:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 912 transitions. [2021-11-19 04:14:59,565 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 912 transitions. Word has length 122 [2021-11-19 04:14:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:59,565 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 912 transitions. [2021-11-19 04:14:59,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 9 states have call successors, (22), 5 states have call predecessors, (22), 7 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 04:14:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 912 transitions. [2021-11-19 04:14:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 04:14:59,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:59,569 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-19 04:14:59,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 04:14:59,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 04:14:59,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1188561693, now seen corresponding path program 2 times [2021-11-19 04:14:59,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:59,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132135192] [2021-11-19 04:14:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:59,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:14:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:14:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:15:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:15:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:15:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:15:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:15:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:15:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 04:15:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:15:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 04:15:00,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:15:00,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132135192] [2021-11-19 04:15:00,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132135192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:15:00,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488977258] [2021-11-19 04:15:00,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:15:00,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:15:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:15:00,572 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:15:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 04:15:00,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:15:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:15:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-19 04:15:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:15:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-19 04:15:00,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-19 04:15:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 121 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:15:06,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:15:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:15:08,402 INFO L354 Elim1Store]: treesize reduction 45, result has 85.0 percent of original size [2021-11-19 04:15:08,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 1146 treesize of output 1213 [2021-11-19 04:15:08,450 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 1643 treesize of output 1599 [2021-11-19 04:15:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 53 proven. 40 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-19 04:15:12,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488977258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:15:12,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:15:12,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 56 [2021-11-19 04:15:12,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025802931] [2021-11-19 04:15:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:15:12,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 04:15:12,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:15:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 04:15:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:15:12,757 INFO L87 Difference]: Start difference. First operand 760 states and 912 transitions. Second operand has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) [2021-11-19 04:15:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:15:19,412 INFO L93 Difference]: Finished difference Result 1564 states and 2061 transitions. [2021-11-19 04:15:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-19 04:15:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) Word has length 135 [2021-11-19 04:15:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:15:19,422 INFO L225 Difference]: With dead ends: 1564 [2021-11-19 04:15:19,423 INFO L226 Difference]: Without dead ends: 1340 [2021-11-19 04:15:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 263 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=711, Invalid=8991, Unknown=0, NotChecked=0, Total=9702 [2021-11-19 04:15:19,426 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 191 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 3605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:15:19,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 3619 Invalid, 3605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2975 Invalid, 0 Unknown, 401 Unchecked, 3.1s Time] [2021-11-19 04:15:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-11-19 04:15:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1131. [2021-11-19 04:15:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 898 states have (on average 1.1893095768374164) internal successors, (1068), 922 states have internal predecessors, (1068), 115 states have call successors, (115), 62 states have call predecessors, (115), 117 states have return successors, (247), 146 states have call predecessors, (247), 114 states have call successors, (247) [2021-11-19 04:15:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1430 transitions. [2021-11-19 04:15:19,750 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1430 transitions. Word has length 135 [2021-11-19 04:15:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:15:19,750 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1430 transitions. [2021-11-19 04:15:19,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 55 states have internal predecessors, (206), 24 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (31), 20 states have call predecessors, (31), 24 states have call successors, (31) [2021-11-19 04:15:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1430 transitions. [2021-11-19 04:15:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 04:15:19,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:15:19,755 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:15:19,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 04:15:19,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:15:19,972 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:15:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:15:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2081362468, now seen corresponding path program 1 times [2021-11-19 04:15:19,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:15:19,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709184498] [2021-11-19 04:15:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:15:19,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:15:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:15:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:15:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:15:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:15:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:15:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 04:15:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:15:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:15:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 04:15:20,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:15:20,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709184498] [2021-11-19 04:15:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709184498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:15:20,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503182421] [2021-11-19 04:15:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:15:20,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:15:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:15:20,477 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:15:20,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 04:15:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-19 04:15:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:15:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:15:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-19 04:15:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:15:20,997 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-19 04:15:20,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 44 [2021-11-19 04:15:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:15:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:15:34,493 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 6070 treesize of output 6006 [2021-11-19 04:15:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 04:15:35,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503182421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:15:35,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:15:35,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2021-11-19 04:15:35,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218258607] [2021-11-19 04:15:35,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:15:35,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:15:35,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:15:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:15:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=837, Unknown=4, NotChecked=0, Total=930 [2021-11-19 04:15:35,382 INFO L87 Difference]: Start difference. First operand 1131 states and 1430 transitions. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-19 04:15:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:15:39,099 INFO L93 Difference]: Finished difference Result 1800 states and 2323 transitions. [2021-11-19 04:15:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:15:39,100 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) Word has length 126 [2021-11-19 04:15:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:15:39,109 INFO L225 Difference]: With dead ends: 1800 [2021-11-19 04:15:39,109 INFO L226 Difference]: Without dead ends: 1259 [2021-11-19 04:15:39,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=200, Invalid=1775, Unknown=5, NotChecked=0, Total=1980 [2021-11-19 04:15:39,113 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 160 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:15:39,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1594 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 556 Invalid, 0 Unknown, 296 Unchecked, 0.7s Time] [2021-11-19 04:15:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-11-19 04:15:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1167. [2021-11-19 04:15:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 929 states have (on average 1.186221743810549) internal successors, (1102), 954 states have internal predecessors, (1102), 118 states have call successors, (118), 64 states have call predecessors, (118), 119 states have return successors, (250), 148 states have call predecessors, (250), 117 states have call successors, (250) [2021-11-19 04:15:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1470 transitions. [2021-11-19 04:15:39,422 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1470 transitions. Word has length 126 [2021-11-19 04:15:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:15:39,422 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1470 transitions. [2021-11-19 04:15:39,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 11 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-19 04:15:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1470 transitions. [2021-11-19 04:15:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 04:15:39,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:15:39,427 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:15:39,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 04:15:39,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:15:39,640 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:15:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:15:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash 594113950, now seen corresponding path program 3 times [2021-11-19 04:15:39,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:15:39,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108001381] [2021-11-19 04:15:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:15:39,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:15:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:39,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:15:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:15:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:15:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:15:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:15:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:15:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:15:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:15:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:15:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:15:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 04:15:40,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:15:40,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108001381] [2021-11-19 04:15:40,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108001381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:15:40,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441224913] [2021-11-19 04:15:40,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:15:40,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:15:40,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:15:40,571 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:15:40,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 04:15:40,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:15:40,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:15:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-19 04:15:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:15:40,819 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:15:40,819 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 04:15:40,846 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-19 04:15:40,846 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-19 04:16:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:16:02,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:16:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 04:16:04,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441224913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:16:04,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:16:04,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 13] total 50 [2021-11-19 04:16:04,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189878801] [2021-11-19 04:16:04,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:16:04,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:16:04,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:16:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:16:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2240, Unknown=1, NotChecked=0, Total=2450 [2021-11-19 04:16:04,059 INFO L87 Difference]: Start difference. First operand 1167 states and 1470 transitions. Second operand has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-19 04:16:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:16:12,174 INFO L93 Difference]: Finished difference Result 1937 states and 2522 transitions. [2021-11-19 04:16:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-19 04:16:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) Word has length 124 [2021-11-19 04:16:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:16:12,185 INFO L225 Difference]: With dead ends: 1937 [2021-11-19 04:16:12,185 INFO L226 Difference]: Without dead ends: 1847 [2021-11-19 04:16:12,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=742, Invalid=8763, Unknown=1, NotChecked=0, Total=9506 [2021-11-19 04:16:12,189 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 186 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:16:12,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2445 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1657 Invalid, 0 Unknown, 493 Unchecked, 1.7s Time] [2021-11-19 04:16:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-11-19 04:16:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1437. [2021-11-19 04:16:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1146 states have (on average 1.1972076788830714) internal successors, (1372), 1179 states have internal predecessors, (1372), 134 states have call successors, (134), 74 states have call predecessors, (134), 156 states have return successors, (331), 183 states have call predecessors, (331), 133 states have call successors, (331) [2021-11-19 04:16:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1837 transitions. [2021-11-19 04:16:12,520 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1837 transitions. Word has length 124 [2021-11-19 04:16:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:16:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 1837 transitions. [2021-11-19 04:16:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 4.208333333333333) internal successors, (202), 49 states have internal predecessors, (202), 21 states have call successors, (33), 4 states have call predecessors, (33), 10 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-19 04:16:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1837 transitions. [2021-11-19 04:16:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 04:16:12,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:16:12,528 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:16:12,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 04:16:12,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:16:12,744 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:16:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:16:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1752416183, now seen corresponding path program 1 times [2021-11-19 04:16:12,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:16:12,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206080625] [2021-11-19 04:16:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:16:12,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:16:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:16:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:16:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:16:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:16:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:16:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:16:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:12,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:16:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:16:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 04:16:13,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:16:13,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206080625] [2021-11-19 04:16:13,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206080625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:16:13,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:16:13,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:16:13,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741442247] [2021-11-19 04:16:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:16:13,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:16:13,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:16:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:16:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:16:13,047 INFO L87 Difference]: Start difference. First operand 1437 states and 1837 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:16:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:16:13,280 INFO L93 Difference]: Finished difference Result 2165 states and 2768 transitions. [2021-11-19 04:16:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:16:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 126 [2021-11-19 04:16:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:16:13,287 INFO L225 Difference]: With dead ends: 2165 [2021-11-19 04:16:13,287 INFO L226 Difference]: Without dead ends: 902 [2021-11-19 04:16:13,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:16:13,294 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:16:13,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 315 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:16:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-19 04:16:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 880. [2021-11-19 04:16:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 702 states have (on average 1.141025641025641) internal successors, (801), 722 states have internal predecessors, (801), 85 states have call successors, (85), 53 states have call predecessors, (85), 92 states have return successors, (152), 104 states have call predecessors, (152), 84 states have call successors, (152) [2021-11-19 04:16:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1038 transitions. [2021-11-19 04:16:13,509 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1038 transitions. Word has length 126 [2021-11-19 04:16:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:16:13,509 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1038 transitions. [2021-11-19 04:16:13,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:16:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1038 transitions. [2021-11-19 04:16:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 04:16:13,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:16:13,513 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:16:13,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 04:16:13,514 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:16:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:16:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1458827973, now seen corresponding path program 1 times [2021-11-19 04:16:13,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:16:13,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823196089] [2021-11-19 04:16:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:16:13,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:16:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:16:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:16:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:16:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:16:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:16:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-19 04:16:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:16:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:16:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-19 04:16:13,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:16:13,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823196089] [2021-11-19 04:16:13,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823196089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:16:13,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:16:13,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:16:13,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261168054] [2021-11-19 04:16:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:16:13,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:16:13,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:16:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:16:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:16:13,722 INFO L87 Difference]: Start difference. First operand 880 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:16:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:16:13,887 INFO L93 Difference]: Finished difference Result 1342 states and 1622 transitions. [2021-11-19 04:16:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:16:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 130 [2021-11-19 04:16:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:16:13,892 INFO L225 Difference]: With dead ends: 1342 [2021-11-19 04:16:13,892 INFO L226 Difference]: Without dead ends: 649 [2021-11-19 04:16:13,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:16:13,896 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:16:13,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 228 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:16:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-11-19 04:16:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 632. [2021-11-19 04:16:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 501 states have (on average 1.089820359281437) internal successors, (546), 519 states have internal predecessors, (546), 70 states have call successors, (70), 42 states have call predecessors, (70), 60 states have return successors, (95), 70 states have call predecessors, (95), 69 states have call successors, (95) [2021-11-19 04:16:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 711 transitions. [2021-11-19 04:16:14,044 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 711 transitions. Word has length 130 [2021-11-19 04:16:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:16:14,045 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 711 transitions. [2021-11-19 04:16:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 04:16:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 711 transitions. [2021-11-19 04:16:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 04:16:14,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:16:14,048 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:16:14,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 04:16:14,048 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:16:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:16:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash -993241429, now seen corresponding path program 1 times [2021-11-19 04:16:14,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:16:14,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959055112] [2021-11-19 04:16:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:16:14,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:16:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:16:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:16:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:16:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:16:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:16:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:16:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:16:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-19 04:16:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-19 04:16:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-19 04:16:14,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:16:14,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959055112] [2021-11-19 04:16:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959055112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:16:14,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:16:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:16:14,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910508740] [2021-11-19 04:16:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:16:14,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:16:14,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:16:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:16:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:16:14,334 INFO L87 Difference]: Start difference. First operand 632 states and 711 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:16:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:16:14,647 INFO L93 Difference]: Finished difference Result 638 states and 716 transitions. [2021-11-19 04:16:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:16:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 129 [2021-11-19 04:16:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:16:14,651 INFO L225 Difference]: With dead ends: 638 [2021-11-19 04:16:14,651 INFO L226 Difference]: Without dead ends: 636 [2021-11-19 04:16:14,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:16:14,653 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 12 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:16:14,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 485 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:16:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-19 04:16:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2021-11-19 04:16:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 504 states have (on average 1.0892857142857142) internal successors, (549), 522 states have internal predecessors, (549), 70 states have call successors, (70), 43 states have call predecessors, (70), 61 states have return successors, (95), 70 states have call predecessors, (95), 69 states have call successors, (95) [2021-11-19 04:16:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 714 transitions. [2021-11-19 04:16:14,796 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 714 transitions. Word has length 129 [2021-11-19 04:16:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:16:14,796 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 714 transitions. [2021-11-19 04:16:14,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:16:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 714 transitions. [2021-11-19 04:16:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 04:16:14,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:16:14,800 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:16:14,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 04:16:14,800 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:16:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:16:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1726499319, now seen corresponding path program 2 times [2021-11-19 04:16:14,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:16:14,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543193140] [2021-11-19 04:16:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:16:14,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:16:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:16:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:16:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:16:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:16:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:16:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:16:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:16:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:16:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 04:16:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:16:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:16:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 22 proven. 65 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-19 04:16:16,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:16:16,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543193140] [2021-11-19 04:16:16,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543193140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:16:16,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806998383] [2021-11-19 04:16:16,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:16:16,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:16:16,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:16:16,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:16:16,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 04:16:16,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:16:16,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:16:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 142 conjunts are in the unsatisfiable core [2021-11-19 04:16:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:16:16,377 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-19 04:16:16,378 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-19 04:16:16,396 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 04:16:16,396 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-19 04:17:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 120 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:17:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:17:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 34 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 04:17:38,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806998383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:17:38,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:17:38,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 19] total 55 [2021-11-19 04:17:38,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12970917] [2021-11-19 04:17:38,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:17:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:17:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:17:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:17:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2721, Unknown=13, NotChecked=0, Total=2970 [2021-11-19 04:17:38,711 INFO L87 Difference]: Start difference. First operand 636 states and 714 transitions. Second operand has 55 states, 53 states have (on average 3.849056603773585) internal successors, (204), 48 states have internal predecessors, (204), 19 states have call successors, (29), 5 states have call predecessors, (29), 14 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-19 04:17:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:17:59,146 INFO L93 Difference]: Finished difference Result 782 states and 877 transitions. [2021-11-19 04:17:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 04:17:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.849056603773585) internal successors, (204), 48 states have internal predecessors, (204), 19 states have call successors, (29), 5 states have call predecessors, (29), 14 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) Word has length 137 [2021-11-19 04:17:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:17:59,149 INFO L225 Difference]: With dead ends: 782 [2021-11-19 04:17:59,149 INFO L226 Difference]: Without dead ends: 694 [2021-11-19 04:17:59,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 94.5s TimeCoverageRelationStatistics Valid=328, Invalid=4078, Unknown=16, NotChecked=0, Total=4422 [2021-11-19 04:17:59,151 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 140 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:17:59,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 2318 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 259 Unchecked, 0.2s Time] [2021-11-19 04:17:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-11-19 04:17:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 654. [2021-11-19 04:17:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 524 states have (on average 1.083969465648855) internal successors, (568), 540 states have internal predecessors, (568), 65 states have call successors, (65), 48 states have call predecessors, (65), 64 states have return successors, (85), 65 states have call predecessors, (85), 64 states have call successors, (85) [2021-11-19 04:17:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 718 transitions. [2021-11-19 04:17:59,292 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 718 transitions. Word has length 137 [2021-11-19 04:17:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:17:59,292 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 718 transitions. [2021-11-19 04:17:59,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.849056603773585) internal successors, (204), 48 states have internal predecessors, (204), 19 states have call successors, (29), 5 states have call predecessors, (29), 14 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) [2021-11-19 04:17:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 718 transitions. [2021-11-19 04:17:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 04:17:59,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:17:59,295 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:17:59,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 04:17:59,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-19 04:17:59,520 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:17:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:17:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1468333881, now seen corresponding path program 1 times [2021-11-19 04:17:59,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:17:59,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054141640] [2021-11-19 04:17:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:17:59,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:17:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:17:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:17:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:17:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:17:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:17:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:17:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:17:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:17:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:17:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:17:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-19 04:17:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:17:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:17:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:18:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:18:00,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:18:00,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054141640] [2021-11-19 04:18:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054141640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:18:00,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998517509] [2021-11-19 04:18:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:18:00,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:18:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:18:00,133 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:18:00,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 04:18:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:18:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-19 04:18:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:18:00,442 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-19 04:18:00,442 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-19 04:18:00,459 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 04:18:00,459 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-19 04:18:17,992 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:18:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 87 proven. 60 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:18:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:18:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 46 proven. 61 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 04:18:51,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998517509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:18:51,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:18:51,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 16] total 46 [2021-11-19 04:18:51,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36668329] [2021-11-19 04:18:51,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:18:51,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 04:18:51,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:18:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 04:18:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1882, Unknown=2, NotChecked=0, Total=2070 [2021-11-19 04:18:51,939 INFO L87 Difference]: Start difference. First operand 654 states and 718 transitions. Second operand has 46 states, 46 states have (on average 4.130434782608695) internal successors, (190), 43 states have internal predecessors, (190), 15 states have call successors, (23), 5 states have call predecessors, (23), 10 states have return successors, (23), 13 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-19 04:19:00,963 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:19:06,299 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:19:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:12,318 INFO L93 Difference]: Finished difference Result 754 states and 842 transitions. [2021-11-19 04:19:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 04:19:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.130434782608695) internal successors, (190), 43 states have internal predecessors, (190), 15 states have call successors, (23), 5 states have call predecessors, (23), 10 states have return successors, (23), 13 states have call predecessors, (23), 14 states have call successors, (23) Word has length 137 [2021-11-19 04:19:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:12,322 INFO L225 Difference]: With dead ends: 754 [2021-11-19 04:19:12,322 INFO L226 Difference]: Without dead ends: 672 [2021-11-19 04:19:12,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 270 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=453, Invalid=4236, Unknown=3, NotChecked=0, Total=4692 [2021-11-19 04:19:12,325 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 156 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:12,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1667 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2021-11-19 04:19:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-19 04:19:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 648. [2021-11-19 04:19:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 520 states have (on average 1.0826923076923076) internal successors, (563), 534 states have internal predecessors, (563), 65 states have call successors, (65), 48 states have call predecessors, (65), 62 states have return successors, (81), 65 states have call predecessors, (81), 64 states have call successors, (81) [2021-11-19 04:19:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 709 transitions. [2021-11-19 04:19:12,498 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 709 transitions. Word has length 137 [2021-11-19 04:19:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:12,499 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 709 transitions. [2021-11-19 04:19:12,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.130434782608695) internal successors, (190), 43 states have internal predecessors, (190), 15 states have call successors, (23), 5 states have call predecessors, (23), 10 states have return successors, (23), 13 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-19 04:19:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 709 transitions. [2021-11-19 04:19:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 04:19:12,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:12,502 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:12,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 04:19:12,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-19 04:19:12,716 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:19:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1448373495, now seen corresponding path program 1 times [2021-11-19 04:19:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:12,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308086306] [2021-11-19 04:19:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:12,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:12,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:19:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:12,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:19:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:19:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:19:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:19:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:19:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:19:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-19 04:19:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:19:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:19:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 04:19:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-19 04:19:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-19 04:19:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-19 04:19:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-19 04:19:13,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:13,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308086306] [2021-11-19 04:19:13,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308086306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:13,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111799647] [2021-11-19 04:19:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:13,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:13,266 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:13,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a957ac5-0361-4cb9-afa8-fd1f61d0dfef/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 04:19:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:19:13,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:13,666 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:19:13,667 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 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-19 04:19:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:19:13,868 INFO L354 Elim1Store]: treesize reduction 123, result has 25.0 percent of original size [2021-11-19 04:19:13,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 64 [2021-11-19 04:19:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:19:14,412 INFO L354 Elim1Store]: treesize reduction 286, result has 23.9 percent of original size [2021-11-19 04:19:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 104 treesize of output 131 [2021-11-19 04:19:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 04:19:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:19:40,477 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_13| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_29| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)))) (store .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| (store (store (select .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_13| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_29| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) is different from false [2021-11-19 04:19:40,570 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 26326376 treesize of output 26260840