./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:52:46,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:52:46,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:52:46,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:52:46,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:52:46,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:52:46,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:52:46,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:52:46,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:52:46,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:52:46,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:52:46,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:52:46,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:52:46,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:52:46,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:52:46,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:52:46,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:52:46,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:52:46,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:52:46,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:52:46,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:52:46,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:52:46,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:52:46,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:52:46,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:52:46,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:52:46,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:52:46,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:52:46,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:52:46,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:52:46,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:52:46,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:52:46,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:52:46,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:52:46,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:52:46,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:52:46,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:52:46,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:52:46,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:52:46,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:52:46,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:52:46,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:52:46,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:52:46,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:52:46,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:52:46,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:52:46,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:52:46,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:52:46,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:52:46,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:52:46,710 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:52:46,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:52:46,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:52:46,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:52:46,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:52:46,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:52:46,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:52:46,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:52:46,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:52:46,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:52:46,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:52:46,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:52:46,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:52:46,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:52:46,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:52:46,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:52:46,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:52:46,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:52:46,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:52:46,715 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:52:46,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:52:46,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:52:46,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:52:46,716 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_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2021-11-20 06:52:47,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:52:47,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:52:47,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:52:47,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:52:47,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:52:47,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-20 06:52:47,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/data/bfc08f21a/504ffc248de14f6f91815ccfdca6baeb/FLAGda28bd2e1 [2021-11-20 06:52:48,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:52:48,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-20 06:52:48,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/data/bfc08f21a/504ffc248de14f6f91815ccfdca6baeb/FLAGda28bd2e1 [2021-11-20 06:52:48,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/data/bfc08f21a/504ffc248de14f6f91815ccfdca6baeb [2021-11-20 06:52:48,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:52:48,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:52:48,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:52:48,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:52:48,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:52:48,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:52:48" (1/1) ... [2021-11-20 06:52:48,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d4a737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:48, skipping insertion in model container [2021-11-20 06:52:48,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:52:48" (1/1) ... [2021-11-20 06:52:48,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:52:48,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:52:48,973 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_93824c27-dd0e-457e-83a2-70762c75d6d1/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-20 06:52:48,981 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_93824c27-dd0e-457e-83a2-70762c75d6d1/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-20 06:52:50,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,131 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,138 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,665 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:52:50,667 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:52:50,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:52:50,671 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:52:50,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:52:50,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:52:50,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:52:50,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:52:50,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:52:50,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:52:50,857 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:52:50,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:50,988 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:52:51,196 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:52:51,230 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_93824c27-dd0e-457e-83a2-70762c75d6d1/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-20 06:52:51,231 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_93824c27-dd0e-457e-83a2-70762c75d6d1/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-20 06:52:51,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,273 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,274 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,282 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,282 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:52:51,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:52:51,337 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:52:51,338 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:52:51,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:52:51,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:52:51,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:52:51,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:52:51,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:52:51,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:52:51,396 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:52:51,417 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,418 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:52:51,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:52:51,968 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:52:51,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51 WrapperNode [2021-11-20 06:52:51,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:52:51,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:52:51,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:52:51,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:52:51,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,289 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2021-11-20 06:52:52,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:52:52,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:52:52,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:52:52,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:52:52,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:52:52,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:52:52,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:52:52,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:52:52,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (1/1) ... [2021-11-20 06:52:52,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:52:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:52,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:52:52,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:52:52,602 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 06:52:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 06:52:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:52:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:52:52,605 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:52:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:52:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 06:52:52,608 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 06:52:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:52:52,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:52:52,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:52:52,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:52:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:52:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:52:52,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:52:52,612 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:52:52,613 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:52:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-20 06:52:52,613 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-20 06:52:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-20 06:52:52,614 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-20 06:52:52,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:52:52,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:52:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:52:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 06:52:52,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 06:52:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:52:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:52:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 06:52:52,618 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 06:52:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 06:52:52,619 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 06:52:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:52:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:52:53,133 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:52:53,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:52:54,933 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:52:54,948 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:52:54,948 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-20 06:52:54,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:52:54 BoogieIcfgContainer [2021-11-20 06:52:54,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:52:54,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:52:54,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:52:54,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:52:54,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:52:48" (1/3) ... [2021-11-20 06:52:54,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1117d665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:52:54, skipping insertion in model container [2021-11-20 06:52:54,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:52:51" (2/3) ... [2021-11-20 06:52:54,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1117d665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:52:54, skipping insertion in model container [2021-11-20 06:52:54,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:52:54" (3/3) ... [2021-11-20 06:52:54,962 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2021-11-20 06:52:54,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:52:54,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:52:55,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:52:55,068 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:52:55,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:52:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-20 06:52:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:52:55,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:55,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:55,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2021-11-20 06:52:55,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:55,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261757491] [2021-11-20 06:52:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:55,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:52:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:52:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:55,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:52:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:52:56,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261757491] [2021-11-20 06:52:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261757491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:56,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:52:56,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:52:56,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077891225] [2021-11-20 06:52:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:56,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:52:56,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:52:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:52:56,067 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:52:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:56,551 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2021-11-20 06:52:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:52:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-11-20 06:52:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:56,574 INFO L225 Difference]: With dead ends: 320 [2021-11-20 06:52:56,575 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 06:52:56,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:52:56,594 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:56,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 340 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:52:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 06:52:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2021-11-20 06:52:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 06:52:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2021-11-20 06:52:56,695 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2021-11-20 06:52:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:56,697 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2021-11-20 06:52:56,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:52:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2021-11-20 06:52:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:52:56,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:56,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:56,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:52:56,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2021-11-20 06:52:56,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051747600] [2021-11-20 06:52:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:56,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:56,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:52:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:57,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:52:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:52:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:52:57,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051747600] [2021-11-20 06:52:57,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051747600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:57,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:52:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:52:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801822569] [2021-11-20 06:52:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:57,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:52:57,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:52:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:52:57,103 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 06:52:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:57,734 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2021-11-20 06:52:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:52:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-11-20 06:52:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:57,749 INFO L225 Difference]: With dead ends: 307 [2021-11-20 06:52:57,749 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 06:52:57,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:52:57,752 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 202 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:57,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 598 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:52:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 06:52:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2021-11-20 06:52:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-20 06:52:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2021-11-20 06:52:57,796 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2021-11-20 06:52:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:57,801 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2021-11-20 06:52:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 06:52:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2021-11-20 06:52:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:52:57,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:57,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:57,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:52:57,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2021-11-20 06:52:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:57,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580925753] [2021-11-20 06:52:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:57,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:52:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:52:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:52:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:52:58,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:58,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580925753] [2021-11-20 06:52:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580925753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:58,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:52:58,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:52:58,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520421761] [2021-11-20 06:52:58,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:58,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:52:58,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:52:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:52:58,243 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:52:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:58,768 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2021-11-20 06:52:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:52:58,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2021-11-20 06:52:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:58,772 INFO L225 Difference]: With dead ends: 210 [2021-11-20 06:52:58,773 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 06:52:58,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:52:58,775 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 125 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:58,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 851 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:52:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 06:52:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-11-20 06:52:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-20 06:52:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-11-20 06:52:58,795 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2021-11-20 06:52:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:58,795 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-11-20 06:52:58,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:52:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-11-20 06:52:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:52:58,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:58,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:58,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:52:58,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2021-11-20 06:52:58,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111361092] [2021-11-20 06:52:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:58,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:52:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:52:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:52:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:52:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:52:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:52:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:52:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:52:59,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111361092] [2021-11-20 06:52:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111361092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:59,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997575155] [2021-11-20 06:52:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:59,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:59,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:52:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:52:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:52:59,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:52:59,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997575155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:59,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:59,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-11-20 06:52:59,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120925806] [2021-11-20 06:52:59,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:59,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:52:59,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:52:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:52:59,996 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:00,043 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2021-11-20 06:53:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:53:00,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-20 06:53:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:00,046 INFO L225 Difference]: With dead ends: 204 [2021-11-20 06:53:00,046 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 06:53:00,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:53:00,048 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:00,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1030 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 06:53:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-20 06:53:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-20 06:53:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-11-20 06:53:00,065 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2021-11-20 06:53:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-11-20 06:53:00,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-11-20 06:53:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:53:00,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:00,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:00,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:53:00,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 06:53:00,285 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2021-11-20 06:53:00,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:00,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437401209] [2021-11-20 06:53:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:00,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:53:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:53:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:53:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:00,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:00,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437401209] [2021-11-20 06:53:00,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437401209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:00,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:00,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:53:00,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140652847] [2021-11-20 06:53:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:00,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:53:00,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:53:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:53:00,632 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:01,298 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2021-11-20 06:53:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:53:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2021-11-20 06:53:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:01,301 INFO L225 Difference]: With dead ends: 181 [2021-11-20 06:53:01,301 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 06:53:01,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:53:01,303 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 144 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:01,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1185 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:53:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 06:53:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-11-20 06:53:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-20 06:53:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2021-11-20 06:53:01,318 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2021-11-20 06:53:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:01,318 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2021-11-20 06:53:01,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2021-11-20 06:53:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:01,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:01,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:01,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:53:01,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2021-11-20 06:53:01,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:01,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420859701] [2021-11-20 06:53:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:01,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:53:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:53:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:53:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:01,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420859701] [2021-11-20 06:53:01,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420859701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:01,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:01,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:53:01,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306142444] [2021-11-20 06:53:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:01,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:01,782 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:02,404 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2021-11-20 06:53:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:53:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2021-11-20 06:53:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:02,408 INFO L225 Difference]: With dead ends: 347 [2021-11-20 06:53:02,408 INFO L226 Difference]: Without dead ends: 199 [2021-11-20 06:53:02,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:53:02,410 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 201 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:02,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 716 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:53:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-20 06:53:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2021-11-20 06:53:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-20 06:53:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2021-11-20 06:53:02,426 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2021-11-20 06:53:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:02,427 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2021-11-20 06:53:02,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2021-11-20 06:53:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:02,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:02,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:53:02,429 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2021-11-20 06:53:02,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101514619] [2021-11-20 06:53:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:02,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:02,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:03,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:53:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:53:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:53:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:03,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:03,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101514619] [2021-11-20 06:53:03,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101514619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483101935] [2021-11-20 06:53:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:03,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:03,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:03,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:03,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:53:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:03,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:53:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:03,766 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 [2021-11-20 06:53:04,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:04,248 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:53:04,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-11-20 06:53:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:04,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:04,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483101935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:04,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:04,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2021-11-20 06:53:04,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797938887] [2021-11-20 06:53:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:04,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:53:04,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:53:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:53:04,325 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:53:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:04,484 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2021-11-20 06:53:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:53:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2021-11-20 06:53:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:04,487 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:53:04,487 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 06:53:04,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:53:04,489 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:04,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1492 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-20 06:53:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 06:53:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2021-11-20 06:53:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 133 states have (on average 1.255639097744361) internal successors, (167), 135 states have internal predecessors, (167), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (44), 37 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-20 06:53:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2021-11-20 06:53:04,520 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 68 [2021-11-20 06:53:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:04,523 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2021-11-20 06:53:04,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:53:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2021-11-20 06:53:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:04,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:04,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:04,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:04,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -631678396, now seen corresponding path program 1 times [2021-11-20 06:53:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:04,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924680771] [2021-11-20 06:53:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:04,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:53:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:53:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:53:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:53:04,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924680771] [2021-11-20 06:53:04,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924680771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937537180] [2021-11-20 06:53:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:04,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:04,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:04,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:53:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:53:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:53:05,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937537180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:05,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:05,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-20 06:53:05,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135663925] [2021-11-20 06:53:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:05,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:05,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:53:05,573 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:05,605 INFO L93 Difference]: Finished difference Result 348 states and 477 transitions. [2021-11-20 06:53:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-20 06:53:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:05,609 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:53:05,609 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 06:53:05,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:05,611 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 20 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:05,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 06:53:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2021-11-20 06:53:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 126 states have (on average 1.253968253968254) internal successors, (158), 127 states have internal predecessors, (158), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-20 06:53:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2021-11-20 06:53:05,629 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 68 [2021-11-20 06:53:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:05,629 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2021-11-20 06:53:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2021-11-20 06:53:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 06:53:05,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:05,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:05,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:05,850 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2021-11-20 06:53:05,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:05,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110399112] [2021-11-20 06:53:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:05,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:53:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:53:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:53:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:06,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110399112] [2021-11-20 06:53:06,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110399112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:06,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274695395] [2021-11-20 06:53:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:06,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:06,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:06,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:53:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:53:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:53:07,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:07,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274695395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:07,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:07,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-20 06:53:07,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096019324] [2021-11-20 06:53:07,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:53:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:53:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:53:07,006 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:53:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:07,155 INFO L93 Difference]: Finished difference Result 339 states and 467 transitions. [2021-11-20 06:53:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:53:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-11-20 06:53:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:07,158 INFO L225 Difference]: With dead ends: 339 [2021-11-20 06:53:07,158 INFO L226 Difference]: Without dead ends: 185 [2021-11-20 06:53:07,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:53:07,161 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:07,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1531 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-20 06:53:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-20 06:53:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-20 06:53:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-11-20 06:53:07,178 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 72 [2021-11-20 06:53:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-11-20 06:53:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:53:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-11-20 06:53:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:07,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:07,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:07,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:07,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:07,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2021-11-20 06:53:07,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:07,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197765328] [2021-11-20 06:53:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:07,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:07,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:07,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197765328] [2021-11-20 06:53:07,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197765328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:07,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946861754] [2021-11-20 06:53:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:07,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:07,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:07,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:53:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:53:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:08,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:08,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946861754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:08,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:08,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-20 06:53:08,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757626146] [2021-11-20 06:53:08,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:08,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:08,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:53:08,274 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:08,307 INFO L93 Difference]: Finished difference Result 346 states and 483 transitions. [2021-11-20 06:53:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-11-20 06:53:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:08,310 INFO L225 Difference]: With dead ends: 346 [2021-11-20 06:53:08,310 INFO L226 Difference]: Without dead ends: 185 [2021-11-20 06:53:08,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:08,312 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:08,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 606 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-20 06:53:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-20 06:53:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 132 states have internal predecessors, (160), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-20 06:53:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2021-11-20 06:53:08,328 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 74 [2021-11-20 06:53:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:08,329 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2021-11-20 06:53:08,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2021-11-20 06:53:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:08,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:08,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:08,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:08,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:53:08,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2021-11-20 06:53:08,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220649983] [2021-11-20 06:53:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:08,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:53:08,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220649983] [2021-11-20 06:53:08,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220649983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:08,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302684574] [2021-11-20 06:53:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:08,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:08,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:08,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:08,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:53:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:53:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:53:09,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:09,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302684574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:09,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:09,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-20 06:53:09,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839190339] [2021-11-20 06:53:09,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:09,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:09,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:53:09,416 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:09,456 INFO L93 Difference]: Finished difference Result 352 states and 498 transitions. [2021-11-20 06:53:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-11-20 06:53:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:09,459 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:53:09,459 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 06:53:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:09,461 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:09,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 06:53:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-11-20 06:53:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-11-20 06:53:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2021-11-20 06:53:09,481 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 74 [2021-11-20 06:53:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:09,481 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2021-11-20 06:53:09,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:53:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2021-11-20 06:53:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:09,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:09,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:09,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:09,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:09,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2021-11-20 06:53:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427684376] [2021-11-20 06:53:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:10,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:11,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:11,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427684376] [2021-11-20 06:53:11,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427684376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026104310] [2021-11-20 06:53:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:11,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:11,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:11,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:53:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 2463 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:53:11,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 06:53:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:12,584 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:53:12,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-11-20 06:53:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:12,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:13,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026104310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:13,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 28 [2021-11-20 06:53:13,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809688] [2021-11-20 06:53:13,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:13,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:53:13,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:53:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:53:13,180 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:53:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:15,703 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2021-11-20 06:53:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:53:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-11-20 06:53:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:15,706 INFO L225 Difference]: With dead ends: 263 [2021-11-20 06:53:15,706 INFO L226 Difference]: Without dead ends: 235 [2021-11-20 06:53:15,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:53:15,708 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 430 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:15,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1709 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1614 Invalid, 0 Unknown, 454 Unchecked, 1.7s Time] [2021-11-20 06:53:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-20 06:53:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-11-20 06:53:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2021-11-20 06:53:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2021-11-20 06:53:15,726 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 74 [2021-11-20 06:53:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:15,726 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2021-11-20 06:53:15,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:53:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2021-11-20 06:53:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:15,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:15,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:15,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:15,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:15,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2021-11-20 06:53:15,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061135474] [2021-11-20 06:53:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:15,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:16,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061135474] [2021-11-20 06:53:16,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061135474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033286177] [2021-11-20 06:53:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:16,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:16,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:16,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:53:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:53:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:19,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:53:19,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-11-20 06:53:19,586 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-11-20 06:53:19,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-11-20 06:53:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:19,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033286177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:19,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:19,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2021-11-20 06:53:19,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841543567] [2021-11-20 06:53:19,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:19,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:53:19,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:19,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:53:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:53:19,790 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-20 06:53:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:22,833 INFO L93 Difference]: Finished difference Result 305 states and 410 transitions. [2021-11-20 06:53:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:53:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2021-11-20 06:53:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:22,836 INFO L225 Difference]: With dead ends: 305 [2021-11-20 06:53:22,837 INFO L226 Difference]: Without dead ends: 293 [2021-11-20 06:53:22,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 06:53:22,839 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 370 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:22,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1694 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1359 Invalid, 0 Unknown, 311 Unchecked, 1.6s Time] [2021-11-20 06:53:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-20 06:53:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2021-11-20 06:53:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 191 states have internal predecessors, (220), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-20 06:53:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2021-11-20 06:53:22,863 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 74 [2021-11-20 06:53:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:22,863 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2021-11-20 06:53:22,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-20 06:53:22,864 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2021-11-20 06:53:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:22,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:22,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:22,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:53:23,093 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1526436777, now seen corresponding path program 1 times [2021-11-20 06:53:23,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:23,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749697731] [2021-11-20 06:53:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:23,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:23,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749697731] [2021-11-20 06:53:23,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749697731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:23,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:23,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:53:23,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067098016] [2021-11-20 06:53:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:23,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:23,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:23,382 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:23,871 INFO L93 Difference]: Finished difference Result 466 states and 627 transitions. [2021-11-20 06:53:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:53:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2021-11-20 06:53:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:23,874 INFO L225 Difference]: With dead ends: 466 [2021-11-20 06:53:23,874 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 06:53:23,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:53:23,876 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 164 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:23,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 593 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:53:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 06:53:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2021-11-20 06:53:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.162162162162162) internal successors, (215), 189 states have internal predecessors, (215), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-20 06:53:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2021-11-20 06:53:23,894 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 74 [2021-11-20 06:53:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:23,895 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2021-11-20 06:53:23,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2021-11-20 06:53:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:53:23,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:23,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:23,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:53:23,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2021-11-20 06:53:23,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761874120] [2021-11-20 06:53:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:23,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:24,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:24,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:24,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:25,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:53:25,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761874120] [2021-11-20 06:53:25,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761874120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910230982] [2021-11-20 06:53:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:25,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:25,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:25,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:53:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:25,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:53:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:25,946 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 19 treesize of output 1 [2021-11-20 06:53:27,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:27,476 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-20 06:53:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2021-11-20 06:53:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:27,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:29,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910230982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:29,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:29,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 33 [2021-11-20 06:53:29,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223527144] [2021-11-20 06:53:29,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:29,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:53:29,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:53:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:53:29,579 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:53:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:32,926 INFO L93 Difference]: Finished difference Result 278 states and 361 transitions. [2021-11-20 06:53:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:53:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-11-20 06:53:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:32,929 INFO L225 Difference]: With dead ends: 278 [2021-11-20 06:53:32,929 INFO L226 Difference]: Without dead ends: 266 [2021-11-20 06:53:32,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:53:32,931 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 343 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:32,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1983 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1951 Invalid, 0 Unknown, 488 Unchecked, 2.1s Time] [2021-11-20 06:53:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-20 06:53:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2021-11-20 06:53:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 180 states have internal predecessors, (204), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-11-20 06:53:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2021-11-20 06:53:32,953 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 74 [2021-11-20 06:53:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:32,953 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2021-11-20 06:53:32,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-20 06:53:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2021-11-20 06:53:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 06:53:32,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:32,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:32,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:33,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:33,181 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2021-11-20 06:53:33,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126720020] [2021-11-20 06:53:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:33,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:53:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:53:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:53:33,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126720020] [2021-11-20 06:53:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126720020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203781660] [2021-11-20 06:53:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:33,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:33,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:53:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:53:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:53:34,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:34,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203781660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:34,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:34,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-20 06:53:34,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452174160] [2021-11-20 06:53:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:34,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:53:34,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:53:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:53:34,153 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:53:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:34,188 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2021-11-20 06:53:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:34,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2021-11-20 06:53:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:34,191 INFO L225 Difference]: With dead ends: 299 [2021-11-20 06:53:34,191 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 06:53:34,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:53:34,193 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:34,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 811 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 06:53:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-11-20 06:53:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 44 states have call successors, (44), 17 states have call predecessors, (44), 21 states have return successors, (69), 43 states have call predecessors, (69), 43 states have call successors, (69) [2021-11-20 06:53:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 321 transitions. [2021-11-20 06:53:34,215 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 321 transitions. Word has length 78 [2021-11-20 06:53:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:34,216 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 321 transitions. [2021-11-20 06:53:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:53:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 321 transitions. [2021-11-20 06:53:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:53:34,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:34,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:34,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:34,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:53:34,433 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2021-11-20 06:53:34,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:34,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151869838] [2021-11-20 06:53:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:34,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:53:34,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151869838] [2021-11-20 06:53:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151869838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:34,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:34,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:53:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723399212] [2021-11-20 06:53:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:53:34,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:53:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:53:34,734 INFO L87 Difference]: Start difference. First operand 245 states and 321 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:35,435 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2021-11-20 06:53:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:53:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2021-11-20 06:53:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:35,438 INFO L225 Difference]: With dead ends: 262 [2021-11-20 06:53:35,438 INFO L226 Difference]: Without dead ends: 238 [2021-11-20 06:53:35,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:53:35,443 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:35,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1468 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:53:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-20 06:53:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-11-20 06:53:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (64), 41 states have call predecessors, (64), 40 states have call successors, (64) [2021-11-20 06:53:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2021-11-20 06:53:35,461 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 76 [2021-11-20 06:53:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:35,461 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2021-11-20 06:53:35,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 06:53:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2021-11-20 06:53:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:53:35,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:35,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:35,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:53:35,465 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2021-11-20 06:53:35,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:35,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259493136] [2021-11-20 06:53:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:35,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:53:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:35,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:53:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259493136] [2021-11-20 06:53:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259493136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:36,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:36,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-20 06:53:36,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204833341] [2021-11-20 06:53:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:36,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:53:36,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:53:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:53:36,091 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:53:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:37,377 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2021-11-20 06:53:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:53:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-11-20 06:53:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:37,379 INFO L225 Difference]: With dead ends: 245 [2021-11-20 06:53:37,379 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 06:53:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:53:37,381 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 228 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:37,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1582 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:53:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 06:53:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-11-20 06:53:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (56), 36 states have call predecessors, (56), 35 states have call successors, (56) [2021-11-20 06:53:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2021-11-20 06:53:37,397 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 76 [2021-11-20 06:53:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:37,398 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2021-11-20 06:53:37,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:53:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2021-11-20 06:53:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:53:37,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:37,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:37,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:53:37,400 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:37,401 INFO L85 PathProgramCache]: Analyzing trace with hash -907054334, now seen corresponding path program 1 times [2021-11-20 06:53:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:37,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625412958] [2021-11-20 06:53:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:37,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:53:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:53:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:53:37,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625412958] [2021-11-20 06:53:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625412958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036917050] [2021-11-20 06:53:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:37,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:37,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:37,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:37,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:53:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:38,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:53:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:53:38,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:38,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036917050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:38,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:38,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 06:53:38,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996884300] [2021-11-20 06:53:38,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:38,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:38,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:53:38,372 INFO L87 Difference]: Start difference. First operand 189 states and 252 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:53:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:38,607 INFO L93 Difference]: Finished difference Result 352 states and 473 transitions. [2021-11-20 06:53:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:53:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2021-11-20 06:53:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:38,610 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:53:38,610 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 06:53:38,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:53:38,612 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 286 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:38,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 667 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:53:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 06:53:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-20 06:53:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.173913043478261) internal successors, (162), 142 states have internal predecessors, (162), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-11-20 06:53:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2021-11-20 06:53:38,628 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 84 [2021-11-20 06:53:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:38,629 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2021-11-20 06:53:38,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:53:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2021-11-20 06:53:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:53:38,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:38,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:38,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:38,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2021-11-20 06:53:38,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578823521] [2021-11-20 06:53:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:38,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:53:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:53:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:53:39,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:39,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578823521] [2021-11-20 06:53:39,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578823521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:39,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:53:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973082264] [2021-11-20 06:53:39,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:53:39,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:53:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:53:39,117 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 06:53:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:39,654 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-11-20 06:53:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:53:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2021-11-20 06:53:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:39,657 INFO L225 Difference]: With dead ends: 268 [2021-11-20 06:53:39,658 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 06:53:39,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:53:39,659 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 132 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:39,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 915 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:53:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 06:53:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2021-11-20 06:53:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-11-20 06:53:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2021-11-20 06:53:39,681 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 89 [2021-11-20 06:53:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:39,682 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2021-11-20 06:53:39,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 06:53:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2021-11-20 06:53:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:53:39,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:39,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:39,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:53:39,685 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2021-11-20 06:53:39,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899055804] [2021-11-20 06:53:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:39,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:53:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:39,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:53:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:53:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899055804] [2021-11-20 06:53:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899055804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:40,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:53:40,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658830311] [2021-11-20 06:53:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:53:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:53:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:53:40,032 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 06:53:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:40,795 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-11-20 06:53:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:53:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2021-11-20 06:53:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:40,798 INFO L225 Difference]: With dead ends: 208 [2021-11-20 06:53:40,798 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 06:53:40,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:53:40,799 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:40,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1135 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:53:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 06:53:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2021-11-20 06:53:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 146 states have internal predecessors, (166), 37 states have call successors, (37), 14 states have call predecessors, (37), 18 states have return successors, (61), 37 states have call predecessors, (61), 36 states have call successors, (61) [2021-11-20 06:53:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2021-11-20 06:53:40,816 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 96 [2021-11-20 06:53:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2021-11-20 06:53:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 06:53:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2021-11-20 06:53:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:53:40,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:40,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:53:40,820 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2021-11-20 06:53:40,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:40,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077929993] [2021-11-20 06:53:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:40,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:53:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:53:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:53:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:53:41,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077929993] [2021-11-20 06:53:41,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077929993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610671395] [2021-11-20 06:53:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:41,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:41,185 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:41,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:53:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:53:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:53:41,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:41,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610671395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:41,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:41,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 06:53:41,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59510283] [2021-11-20 06:53:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:41,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:53:41,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:53:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:53:41,890 INFO L87 Difference]: Start difference. First operand 198 states and 264 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:42,185 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2021-11-20 06:53:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:53:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2021-11-20 06:53:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:42,190 INFO L225 Difference]: With dead ends: 335 [2021-11-20 06:53:42,190 INFO L226 Difference]: Without dead ends: 199 [2021-11-20 06:53:42,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:53:42,192 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 324 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:42,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 781 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:53:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-20 06:53:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-11-20 06:53:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 37 states have call successors, (37), 14 states have call predecessors, (37), 17 states have return successors, (57), 37 states have call predecessors, (57), 36 states have call successors, (57) [2021-11-20 06:53:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2021-11-20 06:53:42,210 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 97 [2021-11-20 06:53:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:42,210 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2021-11-20 06:53:42,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2021-11-20 06:53:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:53:42,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:42,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:42,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:42,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:53:42,426 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2021-11-20 06:53:42,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:42,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298045276] [2021-11-20 06:53:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:42,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:53:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:53:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:53:42,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298045276] [2021-11-20 06:53:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298045276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342774378] [2021-11-20 06:53:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:42,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:43,000 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:43,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:53:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:53:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:43,515 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 15 treesize of output 1 [2021-11-20 06:53:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:53:44,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:44,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342774378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:44,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:44,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-20 06:53:44,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531917866] [2021-11-20 06:53:44,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:44,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:53:44,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:53:44,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:53:44,841 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-20 06:53:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:48,295 INFO L93 Difference]: Finished difference Result 573 states and 836 transitions. [2021-11-20 06:53:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:53:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-11-20 06:53:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:48,300 INFO L225 Difference]: With dead ends: 573 [2021-11-20 06:53:48,300 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 06:53:48,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:53:48,304 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 303 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 4033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:48,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 4124 Invalid, 4033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2874 Invalid, 0 Unknown, 1009 Unchecked, 2.5s Time] [2021-11-20 06:53:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 06:53:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 221. [2021-11-20 06:53:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 168 states have internal predecessors, (189), 37 states have call successors, (37), 15 states have call predecessors, (37), 20 states have return successors, (62), 37 states have call predecessors, (62), 36 states have call successors, (62) [2021-11-20 06:53:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2021-11-20 06:53:48,331 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 100 [2021-11-20 06:53:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:48,332 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2021-11-20 06:53:48,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-20 06:53:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2021-11-20 06:53:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:53:48,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:48,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:48,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:48,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:53:48,561 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195624, now seen corresponding path program 1 times [2021-11-20 06:53:48,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:48,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821123667] [2021-11-20 06:53:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:48,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:53:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:53:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:53:48,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821123667] [2021-11-20 06:53:48,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821123667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417466959] [2021-11-20 06:53:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:48,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:48,874 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:48,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:53:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:53:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:53:49,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:49,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417466959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:49,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:49,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 11 [2021-11-20 06:53:49,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058195848] [2021-11-20 06:53:49,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:49,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:49,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:53:49,592 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:53:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:49,651 INFO L93 Difference]: Finished difference Result 413 states and 537 transitions. [2021-11-20 06:53:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:53:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2021-11-20 06:53:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:49,654 INFO L225 Difference]: With dead ends: 413 [2021-11-20 06:53:49,655 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 06:53:49,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:53:49,657 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 10 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:49,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1182 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 06:53:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-20 06:53:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 154 states have (on average 1.155844155844156) internal successors, (178), 158 states have internal predecessors, (178), 37 states have call successors, (37), 15 states have call predecessors, (37), 19 states have return successors, (60), 37 states have call predecessors, (60), 36 states have call successors, (60) [2021-11-20 06:53:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 275 transitions. [2021-11-20 06:53:49,676 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 275 transitions. Word has length 104 [2021-11-20 06:53:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 275 transitions. [2021-11-20 06:53:49,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:53:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 275 transitions. [2021-11-20 06:53:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:53:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:49,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:49,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:49,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:49,895 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1759064963, now seen corresponding path program 1 times [2021-11-20 06:53:49,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:49,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827427179] [2021-11-20 06:53:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:49,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:53:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:53:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:53:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827427179] [2021-11-20 06:53:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827427179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202723911] [2021-11-20 06:53:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:50,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:50,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:50,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:53:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:53:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:51,048 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 13 treesize of output 9 [2021-11-20 06:53:51,054 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 13 treesize of output 9 [2021-11-20 06:53:51,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:51,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 06:53:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 06:53:51,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 06:53:51,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 06:53:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:53:51,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:51,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202723911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:51,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:51,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2021-11-20 06:53:51,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424512914] [2021-11-20 06:53:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:51,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:53:51,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:53:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:53:51,923 INFO L87 Difference]: Start difference. First operand 211 states and 275 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:52,313 INFO L93 Difference]: Finished difference Result 510 states and 691 transitions. [2021-11-20 06:53:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:53:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 106 [2021-11-20 06:53:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:52,316 INFO L225 Difference]: With dead ends: 510 [2021-11-20 06:53:52,316 INFO L226 Difference]: Without dead ends: 307 [2021-11-20 06:53:52,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:53:52,318 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 60 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:52,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1799 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2021-11-20 06:53:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-20 06:53:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 236. [2021-11-20 06:53:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 178 states have internal predecessors, (198), 40 states have call successors, (40), 18 states have call predecessors, (40), 21 states have return successors, (63), 39 states have call predecessors, (63), 39 states have call successors, (63) [2021-11-20 06:53:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 301 transitions. [2021-11-20 06:53:52,342 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 301 transitions. Word has length 106 [2021-11-20 06:53:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:52,343 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 301 transitions. [2021-11-20 06:53:52,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 301 transitions. [2021-11-20 06:53:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:53:52,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:52,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:52,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:52,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:53:52,559 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -24960513, now seen corresponding path program 1 times [2021-11-20 06:53:52,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:52,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107480571] [2021-11-20 06:53:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:52,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:53:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:53:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:53:53,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107480571] [2021-11-20 06:53:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107480571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617121542] [2021-11-20 06:53:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:53,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:53,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:53,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:53:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 06:53:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:54,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 06:53:55,090 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 06:53:55,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-11-20 06:53:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:53:55,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617121542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:55,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:53:55,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 25 [2021-11-20 06:53:55,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363887378] [2021-11-20 06:53:55,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:55,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:53:55,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:53:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:53:55,178 INFO L87 Difference]: Start difference. First operand 236 states and 301 transitions. Second operand has 25 states, 25 states have (on average 5.88) internal successors, (147), 20 states have internal predecessors, (147), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (19), 5 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-20 06:53:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:57,529 INFO L93 Difference]: Finished difference Result 473 states and 605 transitions. [2021-11-20 06:53:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:53:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.88) internal successors, (147), 20 states have internal predecessors, (147), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (19), 5 states have call predecessors, (19), 7 states have call successors, (19) Word has length 106 [2021-11-20 06:53:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:57,532 INFO L225 Difference]: With dead ends: 473 [2021-11-20 06:53:57,532 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:53:57,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:53:57,535 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 376 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:57,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1640 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1762 Invalid, 0 Unknown, 485 Unchecked, 1.6s Time] [2021-11-20 06:53:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:53:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 249. [2021-11-20 06:53:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 184 states have (on average 1.1358695652173914) internal successors, (209), 187 states have internal predecessors, (209), 42 states have call successors, (42), 20 states have call predecessors, (42), 22 states have return successors, (65), 41 states have call predecessors, (65), 41 states have call successors, (65) [2021-11-20 06:53:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 316 transitions. [2021-11-20 06:53:57,564 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 316 transitions. Word has length 106 [2021-11-20 06:53:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:57,564 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 316 transitions. [2021-11-20 06:53:57,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.88) internal successors, (147), 20 states have internal predecessors, (147), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (19), 5 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-20 06:53:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 316 transitions. [2021-11-20 06:53:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:53:57,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:57,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:57,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:57,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:53:57,781 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1914201533, now seen corresponding path program 1 times [2021-11-20 06:53:57,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:57,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453634829] [2021-11-20 06:53:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:57,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:53:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:53:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:53:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:53:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:53:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:53:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:53:58,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:58,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453634829] [2021-11-20 06:53:58,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453634829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:58,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:58,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:53:58,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687550778] [2021-11-20 06:53:58,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:58,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:53:58,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:53:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:53:58,406 INFO L87 Difference]: Start difference. First operand 249 states and 316 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:58,975 INFO L93 Difference]: Finished difference Result 455 states and 581 transitions. [2021-11-20 06:53:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:53:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 106 [2021-11-20 06:53:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:58,977 INFO L225 Difference]: With dead ends: 455 [2021-11-20 06:53:58,977 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 06:53:58,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:53:58,979 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 185 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:58,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 647 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:53:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 06:53:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2021-11-20 06:53:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 172 states have (on average 1.1395348837209303) internal successors, (196), 175 states have internal predecessors, (196), 39 states have call successors, (39), 17 states have call predecessors, (39), 20 states have return successors, (62), 39 states have call predecessors, (62), 38 states have call successors, (62) [2021-11-20 06:53:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 297 transitions. [2021-11-20 06:53:59,000 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 297 transitions. Word has length 106 [2021-11-20 06:53:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:59,001 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 297 transitions. [2021-11-20 06:53:59,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 06:53:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 297 transitions. [2021-11-20 06:53:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:53:59,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:59,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:59,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:53:59,003 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1961555517, now seen corresponding path program 1 times [2021-11-20 06:53:59,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655405081] [2021-11-20 06:53:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:59,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:53:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:53:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:53:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:53:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:53:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:53:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:53:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:53:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:53:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:53:59,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655405081] [2021-11-20 06:53:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655405081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396929814] [2021-11-20 06:53:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:59,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:59,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:59,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:54:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 06:54:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:54:01,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:12,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396929814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:12,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:12,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-20 06:54:12,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845985043] [2021-11-20 06:54:12,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:12,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:54:12,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:54:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1054, Unknown=2, NotChecked=0, Total=1190 [2021-11-20 06:54:12,117 INFO L87 Difference]: Start difference. First operand 232 states and 297 transitions. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-20 06:54:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:16,310 INFO L93 Difference]: Finished difference Result 568 states and 793 transitions. [2021-11-20 06:54:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:54:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 111 [2021-11-20 06:54:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:16,315 INFO L225 Difference]: With dead ends: 568 [2021-11-20 06:54:16,315 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 06:54:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=654, Invalid=2884, Unknown=2, NotChecked=0, Total=3540 [2021-11-20 06:54:16,319 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 349 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 4097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1274 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 3253 Invalid, 4097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2690 Invalid, 0 Unknown, 1274 Unchecked, 2.5s Time] [2021-11-20 06:54:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 06:54:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 256. [2021-11-20 06:54:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 193 states have (on average 1.1398963730569949) internal successors, (220), 196 states have internal predecessors, (220), 41 states have call successors, (41), 18 states have call predecessors, (41), 21 states have return successors, (65), 41 states have call predecessors, (65), 40 states have call successors, (65) [2021-11-20 06:54:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2021-11-20 06:54:16,351 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 111 [2021-11-20 06:54:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:16,351 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2021-11-20 06:54:16,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 22 states have internal predecessors, (134), 8 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-20 06:54:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2021-11-20 06:54:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:54:16,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:16,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:16,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:16,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:54:16,569 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1339854717, now seen corresponding path program 1 times [2021-11-20 06:54:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609089624] [2021-11-20 06:54:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:16,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:54:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:54:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:54:18,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609089624] [2021-11-20 06:54:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609089624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410383154] [2021-11-20 06:54:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:18,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:18,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:18,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:54:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 06:54:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:18,848 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 19 treesize of output 1 [2021-11-20 06:54:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:54:20,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:23,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410383154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:23,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:23,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-11-20 06:54:23,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240607418] [2021-11-20 06:54:23,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:54:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:54:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1060, Unknown=1, NotChecked=0, Total=1190 [2021-11-20 06:54:23,257 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand has 29 states, 28 states have (on average 4.357142857142857) internal successors, (122), 24 states have internal predecessors, (122), 9 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:54:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:27,541 INFO L93 Difference]: Finished difference Result 426 states and 547 transitions. [2021-11-20 06:54:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:54:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.357142857142857) internal successors, (122), 24 states have internal predecessors, (122), 9 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2021-11-20 06:54:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:27,545 INFO L225 Difference]: With dead ends: 426 [2021-11-20 06:54:27,545 INFO L226 Difference]: Without dead ends: 364 [2021-11-20 06:54:27,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=495, Invalid=2584, Unknown=1, NotChecked=0, Total=3080 [2021-11-20 06:54:27,548 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 610 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 3380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:27,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 1890 Invalid, 3380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2573 Invalid, 0 Unknown, 485 Unchecked, 2.8s Time] [2021-11-20 06:54:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-20 06:54:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 324. [2021-11-20 06:54:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 244 states have (on average 1.151639344262295) internal successors, (281), 248 states have internal predecessors, (281), 57 states have call successors, (57), 19 states have call predecessors, (57), 22 states have return successors, (87), 56 states have call predecessors, (87), 56 states have call successors, (87) [2021-11-20 06:54:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 425 transitions. [2021-11-20 06:54:27,587 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 425 transitions. Word has length 111 [2021-11-20 06:54:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:27,587 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 425 transitions. [2021-11-20 06:54:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.357142857142857) internal successors, (122), 24 states have internal predecessors, (122), 9 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:54:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 425 transitions. [2021-11-20 06:54:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:54:27,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:27,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:27,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:27,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:54:27,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 535434050, now seen corresponding path program 1 times [2021-11-20 06:54:27,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938050460] [2021-11-20 06:54:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:27,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:54:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:54:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:54:28,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:28,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938050460] [2021-11-20 06:54:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938050460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:28,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:28,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 06:54:28,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399484856] [2021-11-20 06:54:28,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:54:28,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:54:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:54:28,168 INFO L87 Difference]: Start difference. First operand 324 states and 425 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:29,037 INFO L93 Difference]: Finished difference Result 339 states and 441 transitions. [2021-11-20 06:54:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:54:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2021-11-20 06:54:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:29,041 INFO L225 Difference]: With dead ends: 339 [2021-11-20 06:54:29,041 INFO L226 Difference]: Without dead ends: 337 [2021-11-20 06:54:29,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:54:29,042 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 94 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:29,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1351 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:54:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-20 06:54:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 324. [2021-11-20 06:54:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 244 states have (on average 1.151639344262295) internal successors, (281), 248 states have internal predecessors, (281), 57 states have call successors, (57), 19 states have call predecessors, (57), 22 states have return successors, (87), 56 states have call predecessors, (87), 56 states have call successors, (87) [2021-11-20 06:54:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 425 transitions. [2021-11-20 06:54:29,080 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 425 transitions. Word has length 113 [2021-11-20 06:54:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:29,080 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 425 transitions. [2021-11-20 06:54:29,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 425 transitions. [2021-11-20 06:54:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:54:29,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:29,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:29,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:54:29,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash 782483972, now seen corresponding path program 1 times [2021-11-20 06:54:29,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:29,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037418129] [2021-11-20 06:54:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:29,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:54:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:54:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:54:29,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037418129] [2021-11-20 06:54:29,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037418129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:29,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:29,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 06:54:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334739406] [2021-11-20 06:54:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:29,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:54:29,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:54:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:54:29,877 INFO L87 Difference]: Start difference. First operand 324 states and 425 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 06:54:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:31,956 INFO L93 Difference]: Finished difference Result 340 states and 443 transitions. [2021-11-20 06:54:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:54:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 113 [2021-11-20 06:54:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:31,960 INFO L225 Difference]: With dead ends: 340 [2021-11-20 06:54:31,960 INFO L226 Difference]: Without dead ends: 338 [2021-11-20 06:54:31,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:54:31,961 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 398 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:31,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 1877 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:54:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-20 06:54:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2021-11-20 06:54:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 244 states have (on average 1.151639344262295) internal successors, (281), 248 states have internal predecessors, (281), 56 states have call successors, (56), 19 states have call predecessors, (56), 22 states have return successors, (86), 55 states have call predecessors, (86), 55 states have call successors, (86) [2021-11-20 06:54:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 423 transitions. [2021-11-20 06:54:31,996 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 423 transitions. Word has length 113 [2021-11-20 06:54:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:31,996 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 423 transitions. [2021-11-20 06:54:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 06:54:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 423 transitions. [2021-11-20 06:54:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 06:54:31,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:31,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:31,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:54:31,999 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 47539994, now seen corresponding path program 1 times [2021-11-20 06:54:32,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:32,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180430002] [2021-11-20 06:54:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:32,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:54:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:54:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:54:32,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180430002] [2021-11-20 06:54:32,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180430002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:32,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:32,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:54:32,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944462749] [2021-11-20 06:54:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:54:32,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:54:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:54:32,260 INFO L87 Difference]: Start difference. First operand 323 states and 423 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:32,741 INFO L93 Difference]: Finished difference Result 438 states and 557 transitions. [2021-11-20 06:54:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:54:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2021-11-20 06:54:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:32,744 INFO L225 Difference]: With dead ends: 438 [2021-11-20 06:54:32,745 INFO L226 Difference]: Without dead ends: 349 [2021-11-20 06:54:32,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:54:32,746 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 182 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:32,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 933 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:54:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-20 06:54:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 323. [2021-11-20 06:54:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 244 states have (on average 1.151639344262295) internal successors, (281), 248 states have internal predecessors, (281), 56 states have call successors, (56), 19 states have call predecessors, (56), 22 states have return successors, (86), 55 states have call predecessors, (86), 55 states have call successors, (86) [2021-11-20 06:54:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 423 transitions. [2021-11-20 06:54:32,784 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 423 transitions. Word has length 114 [2021-11-20 06:54:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:32,785 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 423 transitions. [2021-11-20 06:54:32,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 423 transitions. [2021-11-20 06:54:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 06:54:32,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:32,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:32,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:54:32,788 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1150461638, now seen corresponding path program 1 times [2021-11-20 06:54:32,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:32,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303104194] [2021-11-20 06:54:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:32,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:54:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:54:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:54:33,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303104194] [2021-11-20 06:54:33,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303104194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:33,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:33,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:54:33,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883716993] [2021-11-20 06:54:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:33,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:54:33,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:54:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:54:33,677 INFO L87 Difference]: Start difference. First operand 323 states and 423 transitions. Second operand has 16 states, 15 states have (on average 4.266666666666667) internal successors, (64), 13 states have internal predecessors, (64), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 06:54:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:35,182 INFO L93 Difference]: Finished difference Result 456 states and 592 transitions. [2021-11-20 06:54:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:54:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.266666666666667) internal successors, (64), 13 states have internal predecessors, (64), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 116 [2021-11-20 06:54:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:35,185 INFO L225 Difference]: With dead ends: 456 [2021-11-20 06:54:35,185 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 06:54:35,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:54:35,186 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 463 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:35,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 536 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:54:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 06:54:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 319. [2021-11-20 06:54:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 242 states have (on average 1.1446280991735538) internal successors, (277), 246 states have internal predecessors, (277), 54 states have call successors, (54), 19 states have call predecessors, (54), 22 states have return successors, (84), 53 states have call predecessors, (84), 53 states have call successors, (84) [2021-11-20 06:54:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 415 transitions. [2021-11-20 06:54:35,228 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 415 transitions. Word has length 116 [2021-11-20 06:54:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:35,228 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 415 transitions. [2021-11-20 06:54:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.266666666666667) internal successors, (64), 13 states have internal predecessors, (64), 7 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 06:54:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 415 transitions. [2021-11-20 06:54:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:54:35,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:35,231 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:35,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:54:35,231 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -828439065, now seen corresponding path program 1 times [2021-11-20 06:54:35,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593399621] [2021-11-20 06:54:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:35,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:54:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:54:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:54:35,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593399621] [2021-11-20 06:54:35,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593399621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:35,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:35,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:54:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115197952] [2021-11-20 06:54:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:54:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:54:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:54:35,565 INFO L87 Difference]: Start difference. First operand 319 states and 415 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:36,343 INFO L93 Difference]: Finished difference Result 336 states and 434 transitions. [2021-11-20 06:54:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:54:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2021-11-20 06:54:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:36,347 INFO L225 Difference]: With dead ends: 336 [2021-11-20 06:54:36,347 INFO L226 Difference]: Without dead ends: 334 [2021-11-20 06:54:36,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:54:36,348 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:36,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1044 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:54:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-20 06:54:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 325. [2021-11-20 06:54:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 245 states have (on average 1.1428571428571428) internal successors, (280), 249 states have internal predecessors, (280), 56 states have call successors, (56), 20 states have call predecessors, (56), 23 states have return successors, (86), 55 states have call predecessors, (86), 55 states have call successors, (86) [2021-11-20 06:54:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 422 transitions. [2021-11-20 06:54:36,438 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 422 transitions. Word has length 120 [2021-11-20 06:54:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:36,438 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 422 transitions. [2021-11-20 06:54:36,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 06:54:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 422 transitions. [2021-11-20 06:54:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:54:36,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:36,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:36,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:54:36,441 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 19637997, now seen corresponding path program 1 times [2021-11-20 06:54:36,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:36,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669395795] [2021-11-20 06:54:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:36,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:54:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:54:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:54:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:54:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:54:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:54:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:54:37,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:37,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669395795] [2021-11-20 06:54:37,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669395795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:37,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092236204] [2021-11-20 06:54:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:37,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:37,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:37,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:54:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 06:54:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:54:38,395 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:54:38,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:54:39,785 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 06:54:39,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 06:54:41,553 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 06:54:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-20 06:54:43,424 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-20 06:54:43,453 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 06:54:43,453 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 28 treesize of output 27 [2021-11-20 06:54:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:54:52,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:55,018 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_add_size_checked_aws_add_u64_checked_~b#1_20| Int) (|v_aws_add_size_checked_aws_add_u64_checked_~a#1_20| Int) (|v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_18| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base|) |v_aws_add_size_checked_aws_add_u64_checked_~r#1.offset_18| (+ |v_aws_add_size_checked_aws_add_u64_checked_~a#1_20| |v_aws_add_size_checked_aws_add_u64_checked_~b#1_20|))) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|))) (<= .cse0 (+ 18446744073709551615 (* 18446744073709551616 (div (+ (- 1) .cse0) 18446744073709551616)))))) is different from false [2021-11-20 06:54:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092236204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:55,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:55,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2021-11-20 06:54:55,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620446403] [2021-11-20 06:54:55,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 06:54:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 06:54:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2157, Unknown=4, NotChecked=190, Total=2550 [2021-11-20 06:54:55,026 INFO L87 Difference]: Start difference. First operand 325 states and 422 transitions. Second operand has 47 states, 45 states have (on average 4.044444444444444) internal successors, (182), 41 states have internal predecessors, (182), 16 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-20 06:56:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:19,740 INFO L93 Difference]: Finished difference Result 658 states and 883 transitions. [2021-11-20 06:56:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:56:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 4.044444444444444) internal successors, (182), 41 states have internal predecessors, (182), 16 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) Word has length 124 [2021-11-20 06:56:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:19,747 INFO L225 Difference]: With dead ends: 658 [2021-11-20 06:56:19,747 INFO L226 Difference]: Without dead ends: 522 [2021-11-20 06:56:19,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 167 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 95.5s TimeCoverageRelationStatistics Valid=828, Invalid=6451, Unknown=39, NotChecked=338, Total=7656 [2021-11-20 06:56:19,754 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 406 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 5350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2621 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:19,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 3351 Invalid, 5350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2537 Invalid, 0 Unknown, 2621 Unchecked, 3.5s Time] [2021-11-20 06:56:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-20 06:56:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 443. [2021-11-20 06:56:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 337 states have (on average 1.1602373887240356) internal successors, (391), 349 states have internal predecessors, (391), 75 states have call successors, (75), 23 states have call predecessors, (75), 30 states have return successors, (134), 70 states have call predecessors, (134), 74 states have call successors, (134) [2021-11-20 06:56:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2021-11-20 06:56:19,826 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 124 [2021-11-20 06:56:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:19,827 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2021-11-20 06:56:19,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 4.044444444444444) internal successors, (182), 41 states have internal predecessors, (182), 16 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-20 06:56:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2021-11-20 06:56:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:56:19,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:19,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:19,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:20,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 06:56:20,045 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1260225681, now seen corresponding path program 2 times [2021-11-20 06:56:20,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:20,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682966364] [2021-11-20 06:56:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:20,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:56:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:56:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:56:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:56:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:56:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:56:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:56:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:56:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:56:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:56:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:56:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:56:20,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682966364] [2021-11-20 06:56:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682966364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:56:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512188891] [2021-11-20 06:56:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:56:20,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:20,961 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:20,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:56:22,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:56:22,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:56:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:56:22,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:56:24,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:25,603 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 26 treesize of output 14 [2021-11-20 06:56:25,888 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 06:56:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-11-20 06:56:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:56:26,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512188891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:26,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:56:26,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 11] total 29 [2021-11-20 06:56:26,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087096567] [2021-11-20 06:56:26,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:26,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:56:26,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:26,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:56:26,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:56:26,110 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:56:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:33,004 INFO L93 Difference]: Finished difference Result 760 states and 1074 transitions. [2021-11-20 06:56:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:56:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 124 [2021-11-20 06:56:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:33,012 INFO L225 Difference]: With dead ends: 760 [2021-11-20 06:56:33,012 INFO L226 Difference]: Without dead ends: 629 [2021-11-20 06:56:33,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 255 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:56:33,015 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 443 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:33,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1455 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2360 Invalid, 0 Unknown, 410 Unchecked, 3.9s Time] [2021-11-20 06:56:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-20 06:56:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 554. [2021-11-20 06:56:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 417 states have (on average 1.1870503597122302) internal successors, (495), 435 states have internal predecessors, (495), 103 states have call successors, (103), 26 states have call predecessors, (103), 33 states have return successors, (203), 92 states have call predecessors, (203), 102 states have call successors, (203) [2021-11-20 06:56:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 801 transitions. [2021-11-20 06:56:33,111 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 801 transitions. Word has length 124 [2021-11-20 06:56:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:33,112 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 801 transitions. [2021-11-20 06:56:33,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:56:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 801 transitions. [2021-11-20 06:56:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:56:33,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:33,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:33,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:33,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 06:56:33,319 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -947242963, now seen corresponding path program 1 times [2021-11-20 06:56:33,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072191017] [2021-11-20 06:56:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:33,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:33,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:56:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:56:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:56:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:56:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:56:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:56:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:56:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:56:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:56:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:56:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:56:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 06:56:34,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072191017] [2021-11-20 06:56:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072191017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:56:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035187200] [2021-11-20 06:56:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:34,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:34,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:34,748 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:34,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:56:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 06:56:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:56:35,664 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:56:35,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 06:56:35,696 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 15 treesize of output 1 [2021-11-20 06:56:36,090 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:56:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:56:37,456 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 06:56:37,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 29 [2021-11-20 06:56:39,673 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-20 06:56:39,710 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:56:39,710 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 30 treesize of output 29 [2021-11-20 06:56:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:56:48,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035187200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:57:18,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:57:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 39 [2021-11-20 06:57:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118943443] [2021-11-20 06:57:18,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:57:18,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:57:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1732, Unknown=13, NotChecked=84, Total=1980 [2021-11-20 06:57:18,627 INFO L87 Difference]: Start difference. First operand 554 states and 801 transitions. Second operand has 39 states, 36 states have (on average 4.5) internal successors, (162), 34 states have internal predecessors, (162), 14 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-20 06:58:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:15,093 INFO L93 Difference]: Finished difference Result 1066 states and 1564 transitions. [2021-11-20 06:58:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 06:58:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.5) internal successors, (162), 34 states have internal predecessors, (162), 14 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) Word has length 124 [2021-11-20 06:58:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:15,104 INFO L225 Difference]: With dead ends: 1066 [2021-11-20 06:58:15,104 INFO L226 Difference]: Without dead ends: 719 [2021-11-20 06:58:15,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 95.2s TimeCoverageRelationStatistics Valid=456, Invalid=4913, Unknown=37, NotChecked=144, Total=5550 [2021-11-20 06:58:15,111 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 356 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2539 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:15,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2539 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1631 Invalid, 0 Unknown, 1378 Unchecked, 3.2s Time] [2021-11-20 06:58:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-20 06:58:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 630. [2021-11-20 06:58:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 484 states have (on average 1.1797520661157024) internal successors, (571), 504 states have internal predecessors, (571), 108 states have call successors, (108), 30 states have call predecessors, (108), 37 states have return successors, (215), 95 states have call predecessors, (215), 107 states have call successors, (215) [2021-11-20 06:58:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 894 transitions. [2021-11-20 06:58:15,193 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 894 transitions. Word has length 124 [2021-11-20 06:58:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:15,193 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 894 transitions. [2021-11-20 06:58:15,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.5) internal successors, (162), 34 states have internal predecessors, (162), 14 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-20 06:58:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 894 transitions. [2021-11-20 06:58:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:58:15,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:15,198 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:15,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:15,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:58:15,413 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -225839239, now seen corresponding path program 1 times [2021-11-20 06:58:15,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:15,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139158040] [2021-11-20 06:58:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:15,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:58:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:58:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:58:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:58:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:58:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:58:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:58:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:58:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:58:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:58:15,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139158040] [2021-11-20 06:58:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139158040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671029449] [2021-11-20 06:58:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:15,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:15,916 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:15,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:58:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2656 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:58:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:58:16,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:58:16,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671029449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:58:16,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:58:16,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 10 [2021-11-20 06:58:16,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876196163] [2021-11-20 06:58:16,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:58:16,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:58:16,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:58:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:58:16,619 INFO L87 Difference]: Start difference. First operand 630 states and 894 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:58:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:16,790 INFO L93 Difference]: Finished difference Result 926 states and 1325 transitions. [2021-11-20 06:58:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:58:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 128 [2021-11-20 06:58:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:16,803 INFO L225 Difference]: With dead ends: 926 [2021-11-20 06:58:16,803 INFO L226 Difference]: Without dead ends: 509 [2021-11-20 06:58:16,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:58:16,807 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 10 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:16,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1148 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:58:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-20 06:58:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 501. [2021-11-20 06:58:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 390 states have (on average 1.1358974358974359) internal successors, (443), 403 states have internal predecessors, (443), 75 states have call successors, (75), 26 states have call predecessors, (75), 35 states have return successors, (153), 71 states have call predecessors, (153), 74 states have call successors, (153) [2021-11-20 06:58:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 671 transitions. [2021-11-20 06:58:16,871 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 671 transitions. Word has length 128 [2021-11-20 06:58:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:16,872 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 671 transitions. [2021-11-20 06:58:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:58:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 671 transitions. [2021-11-20 06:58:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:58:16,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:16,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:16,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:17,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:58:17,089 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash 554369664, now seen corresponding path program 1 times [2021-11-20 06:58:17,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:17,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526384035] [2021-11-20 06:58:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:17,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:58:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:58:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:58:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:58:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:58:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:58:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:58:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:58:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:58:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:58:17,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526384035] [2021-11-20 06:58:17,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526384035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590477700] [2021-11-20 06:58:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:17,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:17,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:17,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:58:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:18,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 06:58:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:21,682 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-20 06:58:21,755 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-20 06:58:21,755 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 33 treesize of output 36 [2021-11-20 06:58:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:58:23,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:58:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590477700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:24,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:24,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 10] total 35 [2021-11-20 06:58:24,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299649460] [2021-11-20 06:58:24,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:24,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:58:24,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:58:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1009, Unknown=1, NotChecked=64, Total=1190 [2021-11-20 06:58:24,888 INFO L87 Difference]: Start difference. First operand 501 states and 671 transitions. Second operand has 35 states, 34 states have (on average 5.029411764705882) internal successors, (171), 30 states have internal predecessors, (171), 10 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-11-20 06:58:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:36,785 INFO L93 Difference]: Finished difference Result 964 states and 1403 transitions. [2021-11-20 06:58:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 06:58:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.029411764705882) internal successors, (171), 30 states have internal predecessors, (171), 10 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2021-11-20 06:58:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:36,794 INFO L225 Difference]: With dead ends: 964 [2021-11-20 06:58:36,794 INFO L226 Difference]: Without dead ends: 828 [2021-11-20 06:58:36,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=435, Invalid=2990, Unknown=1, NotChecked=114, Total=3540 [2021-11-20 06:58:36,798 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 400 mSDsluCounter, 3605 mSDsCounter, 0 mSdLazyCounter, 4152 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 6245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 4152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1837 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:36,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 3989 Invalid, 6245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 4152 Invalid, 0 Unknown, 1837 Unchecked, 9.0s Time] [2021-11-20 06:58:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-20 06:58:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 555. [2021-11-20 06:58:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 426 states have (on average 1.1572769953051643) internal successors, (493), 442 states have internal predecessors, (493), 93 states have call successors, (93), 27 states have call predecessors, (93), 35 states have return successors, (176), 85 states have call predecessors, (176), 92 states have call successors, (176) [2021-11-20 06:58:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 762 transitions. [2021-11-20 06:58:36,890 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 762 transitions. Word has length 130 [2021-11-20 06:58:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:36,891 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 762 transitions. [2021-11-20 06:58:36,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.029411764705882) internal successors, (171), 30 states have internal predecessors, (171), 10 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-11-20 06:58:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 762 transitions. [2021-11-20 06:58:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:58:36,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:36,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:58:36,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:37,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:37,109 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash 374394686, now seen corresponding path program 2 times [2021-11-20 06:58:37,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635058641] [2021-11-20 06:58:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:37,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:58:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:58:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:58:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:58:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:58:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:58:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:58:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:58:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:58:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:39,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:58:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:58:39,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635058641] [2021-11-20 06:58:39,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635058641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862613618] [2021-11-20 06:58:39,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:58:39,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:39,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:58:40,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:58:40,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2661 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 06:58:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:44,079 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:58:44,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-11-20 06:58:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:58:44,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:44,955 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 23 treesize of output 11 [2021-11-20 06:58:45,244 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-20 06:58:45,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-20 06:58:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:58:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862613618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:45,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:45,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 9] total 37 [2021-11-20 06:58:45,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240888038] [2021-11-20 06:58:45,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:45,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:58:45,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:58:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1213, Unknown=1, NotChecked=0, Total=1332 [2021-11-20 06:58:45,431 INFO L87 Difference]: Start difference. First operand 555 states and 762 transitions. Second operand has 37 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 13 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (31), 12 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-20 06:59:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:01,687 INFO L93 Difference]: Finished difference Result 807 states and 1118 transitions. [2021-11-20 06:59:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:59:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 13 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (31), 12 states have call predecessors, (31), 12 states have call successors, (31) Word has length 130 [2021-11-20 06:59:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:01,692 INFO L225 Difference]: With dead ends: 807 [2021-11-20 06:59:01,692 INFO L226 Difference]: Without dead ends: 624 [2021-11-20 06:59:01,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 269 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=473, Invalid=3429, Unknown=4, NotChecked=0, Total=3906 [2021-11-20 06:59:01,695 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 674 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:01,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1543 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 3544 Invalid, 0 Unknown, 298 Unchecked, 7.2s Time] [2021-11-20 06:59:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-20 06:59:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 526. [2021-11-20 06:59:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 397 states have (on average 1.1788413098236776) internal successors, (468), 408 states have internal predecessors, (468), 98 states have call successors, (98), 23 states have call predecessors, (98), 30 states have return successors, (170), 94 states have call predecessors, (170), 97 states have call successors, (170) [2021-11-20 06:59:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 736 transitions. [2021-11-20 06:59:01,834 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 736 transitions. Word has length 130 [2021-11-20 06:59:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:01,835 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 736 transitions. [2021-11-20 06:59:01,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.027777777777778) internal successors, (181), 34 states have internal predecessors, (181), 13 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (31), 12 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-20 06:59:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 736 transitions. [2021-11-20 06:59:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:59:01,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:01,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:01,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:02,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:59:02,061 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1292143676, now seen corresponding path program 1 times [2021-11-20 06:59:02,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094410621] [2021-11-20 06:59:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:02,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:59:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:59:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:59:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:59:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:59:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:59:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:59:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:59:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:59:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:59:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:59:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:59:02,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:02,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094410621] [2021-11-20 06:59:02,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094410621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:02,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312404944] [2021-11-20 06:59:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:02,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:02,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:02,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:59:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 06:59:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:03,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:59:04,202 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:59:04,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:59:04,329 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 19 treesize of output 1 [2021-11-20 06:59:06,788 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 06:59:06,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 06:59:09,947 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 06:59:09,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-20 06:59:12,222 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-20 06:59:12,292 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 06:59:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 06:59:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:59:18,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312404944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:37,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:59:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 29] total 40 [2021-11-20 06:59:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674887674] [2021-11-20 06:59:37,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 06:59:37,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 06:59:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1880, Unknown=9, NotChecked=88, Total=2162 [2021-11-20 06:59:37,850 INFO L87 Difference]: Start difference. First operand 526 states and 736 transitions. Second operand has 40 states, 38 states have (on average 4.7368421052631575) internal successors, (180), 34 states have internal predecessors, (180), 12 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 07:01:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:03,620 INFO L93 Difference]: Finished difference Result 774 states and 1058 transitions. [2021-11-20 07:01:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 07:01:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.7368421052631575) internal successors, (180), 34 states have internal predecessors, (180), 12 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) Word has length 130 [2021-11-20 07:01:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:03,626 INFO L225 Difference]: With dead ends: 774 [2021-11-20 07:01:03,626 INFO L226 Difference]: Without dead ends: 650 [2021-11-20 07:01:03,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 108.1s TimeCoverageRelationStatistics Valid=617, Invalid=5665, Unknown=42, NotChecked=156, Total=6480 [2021-11-20 07:01:03,629 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 244 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 4827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2280 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:03,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 3425 Invalid, 4827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2437 Invalid, 0 Unknown, 2280 Unchecked, 6.4s Time] [2021-11-20 07:01:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-20 07:01:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 550. [2021-11-20 07:01:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 417 states have (on average 1.1750599520383693) internal successors, (490), 431 states have internal predecessors, (490), 100 states have call successors, (100), 24 states have call predecessors, (100), 32 states have return successors, (161), 94 states have call predecessors, (161), 99 states have call successors, (161) [2021-11-20 07:01:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 751 transitions. [2021-11-20 07:01:03,732 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 751 transitions. Word has length 130 [2021-11-20 07:01:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:03,733 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 751 transitions. [2021-11-20 07:01:03,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.7368421052631575) internal successors, (180), 34 states have internal predecessors, (180), 12 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 07:01:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 751 transitions. [2021-11-20 07:01:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:01:03,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:03,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:03,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:03,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:03,961 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash -590543802, now seen corresponding path program 1 times [2021-11-20 07:01:03,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:03,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69437150] [2021-11-20 07:01:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:03,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:05,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:01:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:05,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:01:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:05,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:01:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:05,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:01:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:05,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:01:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:06,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:01:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:06,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:01:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:06,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 07:01:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:07,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:01:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:07,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:01:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:01:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:01:07,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:07,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69437150] [2021-11-20 07:01:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69437150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:07,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244018300] [2021-11-20 07:01:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:07,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:07,907 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:07,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:01:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-20 07:01:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:01:09,552 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:01:09,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 07:01:09,711 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 19 treesize of output 1 [2021-11-20 07:01:11,720 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:01:11,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:01:13,940 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:01:13,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 07:01:16,427 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~a#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~b#1| Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (+ |aws_add_size_checked_aws_add_u64_checked_~b#1| |aws_add_size_checked_aws_add_u64_checked_~a#1|))))) is different from true [2021-11-20 07:01:16,518 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 07:01:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 07:01:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:01:28,599 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-20 07:01:28,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2021-11-20 07:01:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:01:28,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:08,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244018300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:08,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:08,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 52 [2021-11-20 07:02:08,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764902442] [2021-11-20 07:02:08,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:08,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:02:08,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:02:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3751, Unknown=17, NotChecked=124, Total=4160 [2021-11-20 07:02:08,688 INFO L87 Difference]: Start difference. First operand 550 states and 751 transitions. Second operand has 52 states, 48 states have (on average 3.625) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-20 07:03:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:12,504 INFO L93 Difference]: Finished difference Result 696 states and 912 transitions. [2021-11-20 07:03:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 07:03:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 3.625) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) Word has length 130 [2021-11-20 07:03:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:12,508 INFO L225 Difference]: With dead ends: 696 [2021-11-20 07:03:12,508 INFO L226 Difference]: Without dead ends: 584 [2021-11-20 07:03:12,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 15 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 116.1s TimeCoverageRelationStatistics Valid=678, Invalid=9589, Unknown=39, NotChecked=200, Total=10506 [2021-11-20 07:03:12,511 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 336 mSDsluCounter, 2072 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1752 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:12,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 2237 Invalid, 3931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2032 Invalid, 0 Unknown, 1752 Unchecked, 5.5s Time] [2021-11-20 07:03:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-20 07:03:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 578. [2021-11-20 07:03:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 442 states have (on average 1.169683257918552) internal successors, (517), 458 states have internal predecessors, (517), 100 states have call successors, (100), 25 states have call predecessors, (100), 35 states have return successors, (159), 94 states have call predecessors, (159), 99 states have call successors, (159) [2021-11-20 07:03:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 776 transitions. [2021-11-20 07:03:12,591 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 776 transitions. Word has length 130 [2021-11-20 07:03:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:12,592 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 776 transitions. [2021-11-20 07:03:12,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 3.625) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-20 07:03:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 776 transitions. [2021-11-20 07:03:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:03:12,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:12,595 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:12,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:12,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:12,817 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1454197833, now seen corresponding path program 1 times [2021-11-20 07:03:12,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210186509] [2021-11-20 07:03:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:12,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:03:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:03:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:03:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:03:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:03:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 07:03:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:03:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:03:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:03:13,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:13,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210186509] [2021-11-20 07:03:13,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210186509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:13,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:13,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 07:03:13,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477910503] [2021-11-20 07:03:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:13,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:03:13,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:03:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:03:13,393 INFO L87 Difference]: Start difference. First operand 578 states and 776 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:03:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:15,743 INFO L93 Difference]: Finished difference Result 590 states and 789 transitions. [2021-11-20 07:03:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:03:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 132 [2021-11-20 07:03:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:15,746 INFO L225 Difference]: With dead ends: 590 [2021-11-20 07:03:15,746 INFO L226 Difference]: Without dead ends: 588 [2021-11-20 07:03:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:03:15,748 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 85 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1306 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:03:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-20 07:03:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 584. [2021-11-20 07:03:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 445 states have (on average 1.1685393258426966) internal successors, (520), 461 states have internal predecessors, (520), 102 states have call successors, (102), 26 states have call predecessors, (102), 36 states have return successors, (161), 96 states have call predecessors, (161), 101 states have call successors, (161) [2021-11-20 07:03:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 783 transitions. [2021-11-20 07:03:15,830 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 783 transitions. Word has length 132 [2021-11-20 07:03:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:15,831 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 783 transitions. [2021-11-20 07:03:15,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:03:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 783 transitions. [2021-11-20 07:03:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:03:15,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:15,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:15,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-20 07:03:15,834 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash 533518477, now seen corresponding path program 1 times [2021-11-20 07:03:15,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:15,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546384978] [2021-11-20 07:03:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:15,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:03:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:03:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:03:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:03:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:03:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 07:03:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:03:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:17,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:03:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:03:18,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546384978] [2021-11-20 07:03:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546384978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085961109] [2021-11-20 07:03:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:18,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:18,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:03:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:19,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 07:03:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:19,290 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 [2021-11-20 07:03:22,563 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 8 treesize of output 4 [2021-11-20 07:03:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:25,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-20 07:03:26,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:03:26,230 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-20 07:03:26,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 07:03:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 07:03:26,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:31,695 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| Int) (v_DerPreprocessor_1 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.offset| v_DerPreprocessor_1)) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 8)) 0))) is different from false [2021-11-20 07:03:31,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085961109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:31,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:31,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 42 [2021-11-20 07:03:31,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324661891] [2021-11-20 07:03:31,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:31,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:03:31,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:03:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2588, Unknown=2, NotChecked=102, Total=2862 [2021-11-20 07:03:31,700 INFO L87 Difference]: Start difference. First operand 584 states and 783 transitions. Second operand has 42 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 34 states have internal predecessors, (140), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-20 07:03:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:43,401 INFO L93 Difference]: Finished difference Result 746 states and 1043 transitions. [2021-11-20 07:03:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 07:03:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 34 states have internal predecessors, (140), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) Word has length 132 [2021-11-20 07:03:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:43,406 INFO L225 Difference]: With dead ends: 746 [2021-11-20 07:03:43,406 INFO L226 Difference]: Without dead ends: 739 [2021-11-20 07:03:43,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 166 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=540, Invalid=6602, Unknown=2, NotChecked=166, Total=7310 [2021-11-20 07:03:43,409 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 371 mSDsluCounter, 3050 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 827 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:43,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 3302 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2538 Invalid, 0 Unknown, 827 Unchecked, 6.2s Time] [2021-11-20 07:03:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-11-20 07:03:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 617. [2021-11-20 07:03:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 474 states have (on average 1.1687763713080168) internal successors, (554), 491 states have internal predecessors, (554), 104 states have call successors, (104), 27 states have call predecessors, (104), 38 states have return successors, (165), 98 states have call predecessors, (165), 103 states have call successors, (165) [2021-11-20 07:03:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 823 transitions. [2021-11-20 07:03:43,499 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 823 transitions. Word has length 132 [2021-11-20 07:03:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 823 transitions. [2021-11-20 07:03:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 34 states have internal predecessors, (140), 13 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-20 07:03:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 823 transitions. [2021-11-20 07:03:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:03:43,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:43,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:43,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-20 07:03:43,717 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2082875853, now seen corresponding path program 1 times [2021-11-20 07:03:43,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:43,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141857149] [2021-11-20 07:03:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:43,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:03:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:03:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:03:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:03:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:03:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 07:03:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:03:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:03:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:03:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 07:03:45,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141857149] [2021-11-20 07:03:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141857149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519577922] [2021-11-20 07:03:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:45,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:45,428 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:45,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93824c27-dd0e-457e-83a2-70762c75d6d1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:03:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 07:03:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:03:46,789 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:03:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:03:46,953 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 27 treesize of output 23 [2021-11-20 07:03:49,546 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-20 07:03:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-20 07:03:52,909 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-20 07:03:52,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2021-11-20 07:03:55,416 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_add_size_checked_aws_add_u64_checked_~r#1.offset| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_add_size_checked_#in~r#1.base|) |aws_add_size_checked_aws_add_u64_checked_~r#1.offset|))))) is different from true [2021-11-20 07:03:55,490 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 07:03:55,490 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 44 treesize of output 24 [2021-11-20 07:04:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:04:13,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:59,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519577922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:04:59,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35] total 54 [2021-11-20 07:04:59,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857442587] [2021-11-20 07:04:59,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:59,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 07:04:59,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 07:04:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3909, Unknown=18, NotChecked=126, Total=4290 [2021-11-20 07:04:59,718 INFO L87 Difference]: Start difference. First operand 617 states and 823 transitions. Second operand has 54 states, 50 states have (on average 3.7) internal successors, (185), 46 states have internal predecessors, (185), 17 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21)