./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:57:38,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:57:38,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:57:38,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:57:38,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:57:38,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:57:38,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:57:38,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:57:38,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:57:38,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:57:38,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:57:38,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:57:38,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:57:38,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:57:38,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:57:38,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:57:38,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:57:38,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:57:38,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:57:38,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:57:38,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:57:38,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:57:38,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:57:38,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:57:38,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:57:38,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:57:38,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:57:38,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:57:38,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:57:38,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:57:38,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:57:38,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:57:38,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:57:38,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:57:38,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:57:38,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:57:38,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:57:38,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:57:38,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:57:38,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:57:38,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:57:38,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 19:57:38,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:57:38,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:57:38,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:57:38,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:57:38,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:57:38,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:57:38,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:57:38,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:57:38,275 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:57:38,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:57:38,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:57:38,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:57:38,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:57:38,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:57:38,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:57:38,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:57:38,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:57:38,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:57:38,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:57:38,278 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_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2021-12-06 19:57:38,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:57:38,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:57:38,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:57:38,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:57:38,493 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:57:38,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-12-06 19:57:38,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/data/294542a6c/7e57ced4dfe249d2be56503e38bb1ce5/FLAG357262346 [2021-12-06 19:57:39,090 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:57:39,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-12-06 19:57:39,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/data/294542a6c/7e57ced4dfe249d2be56503e38bb1ce5/FLAG357262346 [2021-12-06 19:57:39,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/data/294542a6c/7e57ced4dfe249d2be56503e38bb1ce5 [2021-12-06 19:57:39,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:57:39,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:57:39,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:57:39,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:57:39,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:57:39,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:57:39" (1/1) ... [2021-12-06 19:57:39,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6374bb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:39, skipping insertion in model container [2021-12-06 19:57:39,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:57:39" (1/1) ... [2021-12-06 19:57:39,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:57:39,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:57:39,781 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_4698314e-4f19-4687-b257-dbbfe493dd4b/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-12-06 19:57:39,785 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_4698314e-4f19-4687-b257-dbbfe493dd4b/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-12-06 19:57:40,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,307 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:57:40,573 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:57:40,573 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:57:40,574 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:57:40,575 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:57:40,576 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:57:40,576 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:57:40,577 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:57:40,577 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:57:40,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:57:40,680 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:57:40,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:57:40,721 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:57:40,734 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_4698314e-4f19-4687-b257-dbbfe493dd4b/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-12-06 19:57:40,735 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_4698314e-4f19-4687-b257-dbbfe493dd4b/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-12-06 19:57:40,762 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,762 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,762 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,763 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,763 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:57:40,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:57:40,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:57:40,812 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:57:40,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:57:40,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:57:40,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:57:40,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:57:40,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:57:40,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:57:40,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:57:40,835 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:57:40,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:57:40,996 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:57:40,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40 WrapperNode [2021-12-06 19:57:40,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:57:40,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:57:40,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:57:40,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:57:41,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,093 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-12-06 19:57:41,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:57:41,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:57:41,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:57:41,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:57:41,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:57:41,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:57:41,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:57:41,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:57:41,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (1/1) ... [2021-12-06 19:57:41,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:57:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:41,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:57:41,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:57:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-12-06 19:57:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-12-06 19:57:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-06 19:57:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-06 19:57:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:57:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:57:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:57:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:57:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:57:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:57:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:57:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 19:57:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 19:57:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:57:41,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:57:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:57:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:57:41,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:57:41,341 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:57:41,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:57:41,463 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:57:41,467 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:57:41,467 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:57:41,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:57:41 BoogieIcfgContainer [2021-12-06 19:57:41,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:57:41,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:57:41,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:57:41,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:57:41,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:57:39" (1/3) ... [2021-12-06 19:57:41,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db3f1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:57:41, skipping insertion in model container [2021-12-06 19:57:41,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:40" (2/3) ... [2021-12-06 19:57:41,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db3f1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:57:41, skipping insertion in model container [2021-12-06 19:57:41,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:57:41" (3/3) ... [2021-12-06 19:57:41,474 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2021-12-06 19:57:41,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:57:41,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:57:41,511 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:57:41,516 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 [2021-12-06 19:57:41,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:57:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:57:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 19:57:41,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:41,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:41,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2021-12-06 19:57:41,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:41,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254936908] [2021-12-06 19:57:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:41,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:57:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:41,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:41,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254936908] [2021-12-06 19:57:41,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254936908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:41,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:41,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:57:41,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939209331] [2021-12-06 19:57:41,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:41,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:57:41,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:57:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:57:41,796 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:41,811 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-12-06 19:57:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:57:41,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-06 19:57:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:41,819 INFO L225 Difference]: With dead ends: 75 [2021-12-06 19:57:41,819 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 19:57:41,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:57:41,824 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:41,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:57:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 19:57:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-06 19:57:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:57:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-06 19:57:41,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-12-06 19:57:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:41,853 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-06 19:57:41,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-06 19:57:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 19:57:41,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:41,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:57:41,855 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2021-12-06 19:57:41,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860326517] [2021-12-06 19:57:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:41,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:57:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:42,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860326517] [2021-12-06 19:57:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860326517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:42,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:42,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:57:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143632240] [2021-12-06 19:57:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:42,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:57:42,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:57:42,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:57:42,078 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:57:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:42,179 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-06 19:57:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:57:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 19:57:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:42,181 INFO L225 Difference]: With dead ends: 61 [2021-12-06 19:57:42,181 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 19:57:42,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:57:42,183 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:42,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 19:57:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 19:57:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:57:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-06 19:57:42,192 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2021-12-06 19:57:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-06 19:57:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:57:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-06 19:57:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:57:42,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:42,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:57:42,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2047649194, now seen corresponding path program 1 times [2021-12-06 19:57:42,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905759019] [2021-12-06 19:57:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:57:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:42,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905759019] [2021-12-06 19:57:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905759019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118912057] [2021-12-06 19:57:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:42,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:42,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:42,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:57:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 19:57:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:57:43,188 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:57:43,188 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:57:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:43,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:43,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 19:57:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-06 19:57:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:43,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118912057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:43,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:43,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-12-06 19:57:43,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430880393] [2021-12-06 19:57:43,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:43,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:57:43,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:57:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:57:43,677 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:44,027 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-12-06 19:57:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:57:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2021-12-06 19:57:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:44,030 INFO L225 Difference]: With dead ends: 69 [2021-12-06 19:57:44,030 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 19:57:44,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:57:44,032 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:44,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 203 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-12-06 19:57:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 19:57:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-12-06 19:57:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:57:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 19:57:44,042 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2021-12-06 19:57:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:44,043 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 19:57:44,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 19:57:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 19:57:44,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:44,044 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:44,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:57:44,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:44,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 2 times [2021-12-06 19:57:44,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:44,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608898862] [2021-12-06 19:57:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:44,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:44,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 19:57:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:44,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608898862] [2021-12-06 19:57:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608898862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227440024] [2021-12-06 19:57:44,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:57:44,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:44,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:44,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:57:44,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:57:44,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:57:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:44,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227440024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:44,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:44,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-06 19:57:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912702788] [2021-12-06 19:57:44,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:44,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:57:44,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:57:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:57:44,773 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:57:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:45,084 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-12-06 19:57:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:57:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-12-06 19:57:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:45,085 INFO L225 Difference]: With dead ends: 68 [2021-12-06 19:57:45,085 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 19:57:45,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:57:45,086 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:45,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 183 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 19:57:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 19:57:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:57:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-06 19:57:45,092 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2021-12-06 19:57:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:45,092 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-06 19:57:45,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:57:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-06 19:57:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 19:57:45,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:45,093 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:45,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:57:45,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:45,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1668252970, now seen corresponding path program 3 times [2021-12-06 19:57:45,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949673079] [2021-12-06 19:57:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:45,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:45,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 19:57:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:45,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949673079] [2021-12-06 19:57:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949673079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73653072] [2021-12-06 19:57:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:57:45,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:45,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:45,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:57:45,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:57:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 19:57:45,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:46,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 19:57:46,028 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 19:57:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:57:46,066 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 19:57:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:57:46,119 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 19:57:46,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 19:57:46,189 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 19:57:46,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 19:57:46,271 INFO L354 Elim1Store]: treesize reduction 285, result has 15.2 percent of original size [2021-12-06 19:57:46,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-12-06 19:57:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:46,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:48,005 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 44 treesize of output 42 [2021-12-06 19:57:48,009 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 1326 treesize of output 1324 [2021-12-06 19:57:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:48,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73653072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:48,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:48,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2021-12-06 19:57:48,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185107649] [2021-12-06 19:57:48,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:48,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:57:48,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:57:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:57:48,150 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 31 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:48,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:48,824 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-12-06 19:57:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:57:48,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 31 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2021-12-06 19:57:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:48,825 INFO L225 Difference]: With dead ends: 71 [2021-12-06 19:57:48,825 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 19:57:48,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:57:48,827 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:48,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 182 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 325 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2021-12-06 19:57:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 19:57:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 19:57:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-06 19:57:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-06 19:57:48,833 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2021-12-06 19:57:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:48,834 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-06 19:57:48,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 31 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-06 19:57:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 19:57:48,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:48,835 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:57:49,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:49,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1447383329, now seen corresponding path program 1 times [2021-12-06 19:57:49,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569051697] [2021-12-06 19:57:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:49,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:57:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:57:49,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569051697] [2021-12-06 19:57:49,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569051697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:49,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:49,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:57:49,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376145912] [2021-12-06 19:57:49,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:49,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:57:49,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:57:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:57:49,171 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:57:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:49,252 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-06 19:57:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:57:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-12-06 19:57:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:49,254 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:57:49,254 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 19:57:49,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:57:49,255 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:49,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 19:57:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-12-06 19:57:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:57:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 19:57:49,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2021-12-06 19:57:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:49,266 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 19:57:49,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:57:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 19:57:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:57:49,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:49,268 INFO L514 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:49,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:57:49,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1312481004, now seen corresponding path program 1 times [2021-12-06 19:57:49,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:49,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183879057] [2021-12-06 19:57:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:49,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:57:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:57:49,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:49,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183879057] [2021-12-06 19:57:49,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183879057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881481637] [2021-12-06 19:57:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:49,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:49,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:49,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:57:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:49,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 19:57:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 19:57:49,804 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 19:57:49,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:57:49,856 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 19:57:49,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:57:49,920 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 19:57:49,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 19:57:50,000 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 19:57:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 19:57:50,097 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 19:57:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 19:57:50,238 INFO L354 Elim1Store]: treesize reduction 576, result has 12.1 percent of original size [2021-12-06 19:57:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 110 [2021-12-06 19:57:52,083 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_51_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:57:52,083 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_51_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:57:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:52,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:54,797 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 103 treesize of output 99 [2021-12-06 19:57:54,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 19:57:54,808 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 5837 treesize of output 5831 [2021-12-06 19:57:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881481637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:55,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:57:55,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 17] total 42 [2021-12-06 19:57:55,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893616019] [2021-12-06 19:57:55,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:55,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:57:55,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:57:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1515, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:57:55,271 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 40 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:57,501 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-12-06 19:57:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 19:57:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 40 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2021-12-06 19:57:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:57,503 INFO L225 Difference]: With dead ends: 102 [2021-12-06 19:57:57,503 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 19:57:57,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 19:57:57,504 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:57,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 246 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 688 Invalid, 0 Unknown, 157 Unchecked, 1.0s Time] [2021-12-06 19:57:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 19:57:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-12-06 19:57:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:57:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-06 19:57:57,512 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 36 [2021-12-06 19:57:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:57,512 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-06 19:57:57,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 40 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:57:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-06 19:57:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 19:57:57,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:57,513 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:57,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:57:57,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:57,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:57:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash 472583146, now seen corresponding path program 2 times [2021-12-06 19:57:57,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:57,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620758631] [2021-12-06 19:57:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:57,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:57:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:57:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:57:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:57:57,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620758631] [2021-12-06 19:57:57,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620758631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:57,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317599594] [2021-12-06 19:57:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:57:57,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:57,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:57,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:57:58,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:57:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 19:57:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:58,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 19:57:58,258 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 19:57:58,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:57:58,296 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 19:57:58,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:57:58,349 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 19:57:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 19:57:58,408 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 19:57:58,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 19:57:58,480 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 19:57:58,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 19:57:58,569 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-12-06 19:57:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-12-06 19:57:58,672 INFO L354 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2021-12-06 19:57:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2021-12-06 19:58:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:02,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:04,824 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 99 treesize of output 95 [2021-12-06 19:58:05,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2021-12-06 19:58:05,787 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 19:58:05,787 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 12763 treesize of output 12755 [2021-12-06 19:58:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:06,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317599594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:06,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:58:06,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 19] total 47 [2021-12-06 19:58:06,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506561878] [2021-12-06 19:58:06,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:06,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 19:58:06,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 19:58:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1935, Unknown=1, NotChecked=0, Total=2162 [2021-12-06 19:58:06,279 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 45 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:58:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:12,686 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2021-12-06 19:58:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:58:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 45 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-12-06 19:58:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:12,687 INFO L225 Difference]: With dead ends: 112 [2021-12-06 19:58:12,688 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:58:12,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=463, Invalid=4092, Unknown=1, NotChecked=0, Total=4556 [2021-12-06 19:58:12,690 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:12,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 295 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1139 Invalid, 0 Unknown, 184 Unchecked, 1.9s Time] [2021-12-06 19:58:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:58:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-12-06 19:58:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 48 states have internal predecessors, (55), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:58:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-06 19:58:12,698 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 40 [2021-12-06 19:58:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:12,698 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-06 19:58:12,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 45 states have internal predecessors, (74), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:58:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-06 19:58:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:58:12,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:12,699 INFO L514 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:12,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:58:12,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:58:12,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:58:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1064186836, now seen corresponding path program 3 times [2021-12-06 19:58:12,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:12,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623503569] [2021-12-06 19:58:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:12,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:12,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:58:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:58:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:13,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:58:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:58:13,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623503569] [2021-12-06 19:58:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623503569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166103943] [2021-12-06 19:58:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:58:13,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:13,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:13,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:58:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 19:58:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:14,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 19:58:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 19:58:14,089 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 19:58:14,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:58:14,124 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 19:58:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:58:14,173 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 19:58:14,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 19:58:14,233 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 19:58:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 19:58:14,308 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 19:58:14,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 19:58:14,405 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-12-06 19:58:14,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-12-06 19:58:14,516 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-12-06 19:58:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-12-06 19:58:14,639 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-12-06 19:58:14,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-12-06 19:58:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:58:14,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:15,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166103943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:15,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:58:15,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-12-06 19:58:15,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092525723] [2021-12-06 19:58:15,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:15,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:58:15,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:15,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:58:15,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:58:15,111 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:58:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:16,312 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2021-12-06 19:58:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:58:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-06 19:58:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:16,313 INFO L225 Difference]: With dead ends: 104 [2021-12-06 19:58:16,313 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 19:58:16,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:58:16,315 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:16,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 372 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 645 Invalid, 0 Unknown, 35 Unchecked, 0.7s Time] [2021-12-06 19:58:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 19:58:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 19:58:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 19:58:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-06 19:58:16,325 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 44 [2021-12-06 19:58:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-06 19:58:16,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:58:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-06 19:58:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:58:16,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:16,327 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:16,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:58:16,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:16,529 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:58:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1129967912, now seen corresponding path program 4 times [2021-12-06 19:58:16,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920908665] [2021-12-06 19:58:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:16,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:58:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:58:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:16,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:58:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:58:16,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920908665] [2021-12-06 19:58:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920908665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364144025] [2021-12-06 19:58:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:58:16,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:16,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:16,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4698314e-4f19-4687-b257-dbbfe493dd4b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:58:17,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:58:17,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 19:58:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 19:58:17,229 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 19:58:17,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 19:58:17,269 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 19:58:17,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:58:17,321 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 19:58:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 19:58:17,389 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 19:58:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 19:58:17,483 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 19:58:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 19:58:17,582 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 19:58:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 19:58:17,703 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 19:58:17,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 19:58:17,821 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 19:58:17,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 19:58:17,968 INFO L354 Elim1Store]: treesize reduction 278, result has 15.2 percent of original size [2021-12-06 19:58:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-12-06 19:58:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:31,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:29,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 125 [2021-12-06 20:00:31,639 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 20:00:31,715 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 182635270125 treesize of output 182610104301