./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:50:20,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:50:20,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:50:20,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:50:20,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:50:20,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:50:20,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:50:20,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:50:20,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:50:20,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:50:20,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:50:20,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:50:20,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:50:20,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:50:20,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:50:20,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:50:20,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:50:20,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:50:20,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:50:20,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:50:20,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:50:20,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:50:20,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:50:20,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:50:20,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:50:20,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:50:20,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:50:20,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:50:20,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:50:20,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:50:20,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:50:20,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:50:20,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:50:20,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:50:20,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:50:20,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:50:20,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:50:20,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:50:20,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:50:20,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:50:20,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:50:20,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-07 00:50:20,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:50:20,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:50:20,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:50:20,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:50:20,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:50:20,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:50:20,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:50:20,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:50:20,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:50:20,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:50:20,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:20,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:50:20,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:50:20,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:50:20,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:50:20,479 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_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2021-12-07 00:50:20,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:50:20,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:50:20,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:50:20,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:50:20,667 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:50:20,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-07 00:50:20,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/3b168af16/24eb15a696dd4127bbaa07b2381bc2bc/FLAG6f7bd8458 [2021-12-07 00:50:21,296 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:50:21,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-07 00:50:21,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/3b168af16/24eb15a696dd4127bbaa07b2381bc2bc/FLAG6f7bd8458 [2021-12-07 00:50:21,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/3b168af16/24eb15a696dd4127bbaa07b2381bc2bc [2021-12-07 00:50:21,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:50:21,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:50:21,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:21,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:50:21,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:50:21,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:21" (1/1) ... [2021-12-07 00:50:21,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7254bb41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:21, skipping insertion in model container [2021-12-07 00:50:21,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:21" (1/1) ... [2021-12-07 00:50:21,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:50:21,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:50:22,024 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-07 00:50:22,029 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-07 00:50:22,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,713 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,728 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:22,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,028 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:50:23,029 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:50:23,030 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:50:23,031 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:50:23,033 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:50:23,033 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:50:23,034 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:50:23,035 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:50:23,035 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:50:23,036 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:50:23,171 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:50:23,236 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,236 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:23,319 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:50:23,329 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-07 00:50:23,330 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-07 00:50:23,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,361 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,361 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:50:23,386 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:50:23,386 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:50:23,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:50:23,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:50:23,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:50:23,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:50:23,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:50:23,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:50:23,389 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:50:23,402 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:50:23,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,456 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:50:23,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:23,660 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:50:23,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23 WrapperNode [2021-12-07 00:50:23,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:23,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:23,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:50:23,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:50:23,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,789 INFO L137 Inliner]: procedures = 691, calls = 2650, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 873 [2021-12-07 00:50:23,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:23,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:50:23,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:50:23,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:50:23,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:50:23,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:50:23,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:50:23,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:50:23,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (1/1) ... [2021-12-07 00:50:23,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:23,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:50:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:50:23,914 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-07 00:50:23,915 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-07 00:50:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-07 00:50:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:50:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 00:50:23,915 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 00:50:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:50:23,915 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-12-07 00:50:23,916 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-12-07 00:50:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:50:23,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:50:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:50:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:50:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-07 00:50:23,916 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-07 00:50:23,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 00:50:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:50:23,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:50:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 00:50:23,917 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 00:50:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-07 00:50:23,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-07 00:50:23,917 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:50:23,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-07 00:50:23,918 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-07 00:50:23,918 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-07 00:50:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:50:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-07 00:50:23,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-07 00:50:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:50:24,093 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:50:24,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:50:24,917 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:50:24,924 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:50:24,924 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 00:50:24,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:24 BoogieIcfgContainer [2021-12-07 00:50:24,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:50:24,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:50:24,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:50:24,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:50:24,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:50:21" (1/3) ... [2021-12-07 00:50:24,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c310d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:24, skipping insertion in model container [2021-12-07 00:50:24,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:23" (2/3) ... [2021-12-07 00:50:24,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c310d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:24, skipping insertion in model container [2021-12-07 00:50:24,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:24" (3/3) ... [2021-12-07 00:50:24,931 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_harness.i [2021-12-07 00:50:24,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:50:24,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:50:24,969 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:50:24,975 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:50:24,976 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:50:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-07 00:50:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-07 00:50:25,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:25,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-07 00:50:25,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1846687754, now seen corresponding path program 1 times [2021-12-07 00:50:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:25,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106675755] [2021-12-07 00:50:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:25,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 00:50:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 00:50:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-07 00:50:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:50:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 00:50:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 00:50:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-07 00:50:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 00:50:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:50:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 00:50:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-07 00:50:25,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106675755] [2021-12-07 00:50:25,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106675755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:25,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:25,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:25,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748487272] [2021-12-07 00:50:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:25,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:25,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:25,747 INFO L87 Difference]: Start difference. First operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-07 00:50:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:26,028 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2021-12-07 00:50:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-12-07 00:50:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:26,038 INFO L225 Difference]: With dead ends: 267 [2021-12-07 00:50:26,039 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 00:50:26,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:26,045 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 102 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:26,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 196 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:50:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 00:50:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-12-07 00:50:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-07 00:50:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2021-12-07 00:50:26,091 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 102 [2021-12-07 00:50:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:26,092 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2021-12-07 00:50:26,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-07 00:50:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2021-12-07 00:50:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-07 00:50:26,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:26,096 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-07 00:50:26,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:50:26,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash -192509010, now seen corresponding path program 1 times [2021-12-07 00:50:26,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:26,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900945672] [2021-12-07 00:50:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:26,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 00:50:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 00:50:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-07 00:50:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:50:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 00:50:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 00:50:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-07 00:50:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-07 00:50:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:50:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 00:50:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-07 00:50:26,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900945672] [2021-12-07 00:50:26,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900945672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860137922] [2021-12-07 00:50:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:26,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:26,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:26,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:50:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:50:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 00:50:27,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:27,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860137922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:27,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:27,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-07 00:50:27,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518499560] [2021-12-07 00:50:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:50:27,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:50:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:50:27,058 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:50:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:27,203 INFO L93 Difference]: Finished difference Result 252 states and 341 transitions. [2021-12-07 00:50:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:50:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 102 [2021-12-07 00:50:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:27,207 INFO L225 Difference]: With dead ends: 252 [2021-12-07 00:50:27,207 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 00:50:27,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:50:27,210 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:27,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 343 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 00:50:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-07 00:50:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (45), 39 states have call predecessors, (45), 39 states have call successors, (45) [2021-12-07 00:50:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2021-12-07 00:50:27,227 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 102 [2021-12-07 00:50:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:27,227 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2021-12-07 00:50:27,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:50:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2021-12-07 00:50:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-07 00:50:27,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:27,230 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:27,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:50:27,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:27,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash -49851437, now seen corresponding path program 1 times [2021-12-07 00:50:27,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76082610] [2021-12-07 00:50:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:27,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:50:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:50:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 00:50:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 00:50:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 00:50:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-07 00:50:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-07 00:50:27,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76082610] [2021-12-07 00:50:27,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76082610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279344212] [2021-12-07 00:50:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:27,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:27,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:27,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:27,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:50:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:50:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 00:50:28,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:28,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279344212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:28,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:28,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-07 00:50:28,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762051629] [2021-12-07 00:50:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:28,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:50:28,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:50:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:50:28,450 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 00:50:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:28,635 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2021-12-07 00:50:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:50:28,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 104 [2021-12-07 00:50:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:28,638 INFO L225 Difference]: With dead ends: 212 [2021-12-07 00:50:28,638 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 00:50:28,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:50:28,640 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 206 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:28,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 553 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 00:50:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-07 00:50:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (43), 39 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-07 00:50:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2021-12-07 00:50:28,653 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 104 [2021-12-07 00:50:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:28,653 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2021-12-07 00:50:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 00:50:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2021-12-07 00:50:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 00:50:28,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:28,655 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:28,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 00:50:28,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:28,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:28,857 INFO L85 PathProgramCache]: Analyzing trace with hash 160212765, now seen corresponding path program 2 times [2021-12-07 00:50:28,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12778456] [2021-12-07 00:50:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:28,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:50:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:50:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:50:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:50:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-07 00:50:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 00:50:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:50:29,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12778456] [2021-12-07 00:50:29,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12778456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968522408] [2021-12-07 00:50:29,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:29,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:29,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:29,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:50:29,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 00:50:29,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:50:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 00:50:29,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:29,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968522408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:29,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:29,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-07 00:50:29,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015842676] [2021-12-07 00:50:29,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:29,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:50:29,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:50:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:50:29,595 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 00:50:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:29,637 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2021-12-07 00:50:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:50:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2021-12-07 00:50:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:29,639 INFO L225 Difference]: With dead ends: 143 [2021-12-07 00:50:29,639 INFO L226 Difference]: Without dead ends: 141 [2021-12-07 00:50:29,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:50:29,640 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 16 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:29,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1179 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:50:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-07 00:50:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-12-07 00:50:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 41 states have call successors, (41), 12 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-07 00:50:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-12-07 00:50:29,654 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 108 [2021-12-07 00:50:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:29,654 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-12-07 00:50:29,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 00:50:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-12-07 00:50:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:50:29,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:29,656 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:29,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:50:29,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:29,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1574940187, now seen corresponding path program 1 times [2021-12-07 00:50:29,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:29,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788950323] [2021-12-07 00:50:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:29,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:50:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:50:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:50:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:50:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-07 00:50:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 00:50:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:50:30,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788950323] [2021-12-07 00:50:30,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788950323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211657667] [2021-12-07 00:50:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:30,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:30,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:30,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:30,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:50:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:50:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:50:30,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:30,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211657667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:30,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:30,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-07 00:50:30,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145810360] [2021-12-07 00:50:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:50:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:50:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:50:30,647 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 00:50:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:30,815 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2021-12-07 00:50:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:50:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2021-12-07 00:50:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:30,817 INFO L225 Difference]: With dead ends: 245 [2021-12-07 00:50:30,817 INFO L226 Difference]: Without dead ends: 137 [2021-12-07 00:50:30,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:50:30,819 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 205 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:30,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 556 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-07 00:50:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-07 00:50:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2021-12-07 00:50:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2021-12-07 00:50:30,836 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 112 [2021-12-07 00:50:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:30,837 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2021-12-07 00:50:30,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 00:50:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2021-12-07 00:50:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 00:50:30,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:30,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:30,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:50:31,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:31,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash 660367434, now seen corresponding path program 1 times [2021-12-07 00:50:31,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:31,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564414944] [2021-12-07 00:50:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:31,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:50:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:50:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:50:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:50:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:50:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-07 00:50:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:50:31,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564414944] [2021-12-07 00:50:31,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564414944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606450227] [2021-12-07 00:50:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:31,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:31,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:31,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:50:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-07 00:50:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:32,060 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 6 treesize of output 5 [2021-12-07 00:50:32,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:50:32,396 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:50:32,397 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 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-07 00:50:33,362 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 00:50:33,362 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 35 treesize of output 15 [2021-12-07 00:50:33,365 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 9 treesize of output 3 [2021-12-07 00:50:33,368 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 9 treesize of output 3 [2021-12-07 00:50:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 00:50:33,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:49,280 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 64 treesize of output 52 [2021-12-07 00:50:49,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-12-07 00:50:51,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (v_ArrVal_402 Int)) (let ((.cse0 (store (store (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset|)) (+ |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| 8) v_ArrVal_402))) (let ((.cse1 (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| .cse0) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset|) 18446744073709551616))) (or (= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|) 18446744073709551616) .cse1) (and (not (= .cse1 0)) (<= 0 |c_#StackHeapBarrier|)))))) is different from false [2021-12-07 00:50:51,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606450227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:51,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:51,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25] total 35 [2021-12-07 00:50:51,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221848189] [2021-12-07 00:50:51,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:51,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:50:51,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:50:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2367, Unknown=6, NotChecked=98, Total=2652 [2021-12-07 00:50:51,426 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 35 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 13 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 9 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-07 00:50:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:55,918 INFO L93 Difference]: Finished difference Result 429 states and 591 transitions. [2021-12-07 00:50:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-07 00:50:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 13 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 9 states have call predecessors, (34), 13 states have call successors, (34) Word has length 114 [2021-12-07 00:50:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:55,921 INFO L225 Difference]: With dead ends: 429 [2021-12-07 00:50:55,921 INFO L226 Difference]: Without dead ends: 334 [2021-12-07 00:50:55,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 181 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2840 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=879, Invalid=9625, Unknown=6, NotChecked=202, Total=10712 [2021-12-07 00:50:55,925 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 526 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 5461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:55,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 1730 Invalid, 5461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 4517 Invalid, 0 Unknown, 546 Unchecked, 2.4s Time] [2021-12-07 00:50:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-07 00:50:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 269. [2021-12-07 00:50:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 171 states have internal predecessors, (195), 73 states have call successors, (73), 25 states have call predecessors, (73), 27 states have return successors, (87), 72 states have call predecessors, (87), 71 states have call successors, (87) [2021-12-07 00:50:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 355 transitions. [2021-12-07 00:50:55,947 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 355 transitions. Word has length 114 [2021-12-07 00:50:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:55,947 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 355 transitions. [2021-12-07 00:50:55,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 31 states have internal predecessors, (116), 13 states have call successors, (35), 8 states have call predecessors, (35), 12 states have return successors, (34), 9 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-07 00:50:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 355 transitions. [2021-12-07 00:50:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 00:50:55,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:55,949 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:55,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:50:56,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:56,151 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -448097721, now seen corresponding path program 1 times [2021-12-07 00:50:56,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:56,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289645768] [2021-12-07 00:50:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:56,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:50:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:50:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-07 00:50:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-07 00:50:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:50:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 00:50:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-07 00:50:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 00:50:56,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:56,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289645768] [2021-12-07 00:50:56,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289645768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:56,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112768049] [2021-12-07 00:50:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:56,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:56,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:50:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:50:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 00:50:57,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112768049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:57,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:57,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22] total 29 [2021-12-07 00:50:57,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353355731] [2021-12-07 00:50:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:57,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:50:57,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:50:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:50:57,448 INFO L87 Difference]: Start difference. First operand 269 states and 355 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 00:50:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:57,555 INFO L93 Difference]: Finished difference Result 366 states and 492 transitions. [2021-12-07 00:50:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:50:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 125 [2021-12-07 00:50:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:57,558 INFO L225 Difference]: With dead ends: 366 [2021-12-07 00:50:57,558 INFO L226 Difference]: Without dead ends: 279 [2021-12-07 00:50:57,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:50:57,559 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 12 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1281 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-07 00:50:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 274. [2021-12-07 00:50:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 172 states have (on average 1.1569767441860466) internal successors, (199), 176 states have internal predecessors, (199), 73 states have call successors, (73), 25 states have call predecessors, (73), 28 states have return successors, (95), 72 states have call predecessors, (95), 71 states have call successors, (95) [2021-12-07 00:50:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 367 transitions. [2021-12-07 00:50:57,578 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 367 transitions. Word has length 125 [2021-12-07 00:50:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 367 transitions. [2021-12-07 00:50:57,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-07 00:50:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 367 transitions. [2021-12-07 00:50:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-07 00:50:57,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:57,580 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-07 00:50:57,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:50:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:57,781 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash -276342452, now seen corresponding path program 1 times [2021-12-07 00:50:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:57,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481844898] [2021-12-07 00:50:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:57,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:50:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:50:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:50:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:50:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 00:50:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:50:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 00:50:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-07 00:50:58,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481844898] [2021-12-07 00:50:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481844898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943533644] [2021-12-07 00:50:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:58,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:58,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:58,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:50:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:50:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-07 00:50:58,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943533644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:58,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:50:58,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2021-12-07 00:50:58,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821875934] [2021-12-07 00:50:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:58,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:50:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:50:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:50:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:50:58,790 INFO L87 Difference]: Start difference. First operand 274 states and 367 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 00:50:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:58,934 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2021-12-07 00:50:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:50:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 127 [2021-12-07 00:50:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:58,937 INFO L225 Difference]: With dead ends: 484 [2021-12-07 00:50:58,937 INFO L226 Difference]: Without dead ends: 274 [2021-12-07 00:50:58,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:50:58,939 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 17 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:58,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 597 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-12-07 00:50:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-07 00:50:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-12-07 00:50:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 176 states have internal predecessors, (197), 73 states have call successors, (73), 25 states have call predecessors, (73), 28 states have return successors, (95), 72 states have call predecessors, (95), 71 states have call successors, (95) [2021-12-07 00:50:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 365 transitions. [2021-12-07 00:50:58,962 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 365 transitions. Word has length 127 [2021-12-07 00:50:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:58,962 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 365 transitions. [2021-12-07 00:50:58,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-07 00:50:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 365 transitions. [2021-12-07 00:50:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-07 00:50:58,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:58,964 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-07 00:50:58,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:50:59,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:50:59,165 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 284357326, now seen corresponding path program 1 times [2021-12-07 00:50:59,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:59,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293291074] [2021-12-07 00:50:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:59,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:50:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:50:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:50:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:50:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:50:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:50:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:50:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:50:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:50:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:50:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:50:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 00:50:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:50:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:50:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:50:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 00:50:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 00:50:59,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:59,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293291074] [2021-12-07 00:50:59,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293291074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:59,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41832433] [2021-12-07 00:50:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:59,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:59,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:59,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:59,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:51:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:00,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 00:51:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:00,174 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 6 treesize of output 5 [2021-12-07 00:51:00,472 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-12-07 00:51:00,472 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 2 case distinctions, treesize of input 40 treesize of output 45 [2021-12-07 00:51:00,565 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:51:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-12-07 00:51:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-07 00:51:00,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-07 00:51:01,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41832433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:01,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:51:01,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 11] total 35 [2021-12-07 00:51:01,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56719799] [2021-12-07 00:51:01,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:01,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:51:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:51:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:51:01,166 INFO L87 Difference]: Start difference. First operand 274 states and 365 transitions. Second operand has 35 states, 31 states have (on average 4.096774193548387) internal successors, (127), 32 states have internal predecessors, (127), 17 states have call successors, (46), 7 states have call predecessors, (46), 10 states have return successors, (45), 14 states have call predecessors, (45), 17 states have call successors, (45) [2021-12-07 00:51:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:17,424 INFO L93 Difference]: Finished difference Result 626 states and 893 transitions. [2021-12-07 00:51:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:51:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 4.096774193548387) internal successors, (127), 32 states have internal predecessors, (127), 17 states have call successors, (46), 7 states have call predecessors, (46), 10 states have return successors, (45), 14 states have call predecessors, (45), 17 states have call successors, (45) Word has length 127 [2021-12-07 00:51:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:17,427 INFO L225 Difference]: With dead ends: 626 [2021-12-07 00:51:17,428 INFO L226 Difference]: Without dead ends: 483 [2021-12-07 00:51:17,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 272 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=381, Invalid=3650, Unknown=1, NotChecked=0, Total=4032 [2021-12-07 00:51:17,430 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 431 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 4809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:17,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 960 Invalid, 4809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 3657 Invalid, 0 Unknown, 595 Unchecked, 2.2s Time] [2021-12-07 00:51:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-07 00:51:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 325. [2021-12-07 00:51:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 203 states have internal predecessors, (228), 96 states have call successors, (96), 26 states have call predecessors, (96), 29 states have return successors, (124), 95 states have call predecessors, (124), 94 states have call successors, (124) [2021-12-07 00:51:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 448 transitions. [2021-12-07 00:51:17,453 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 448 transitions. Word has length 127 [2021-12-07 00:51:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:17,454 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 448 transitions. [2021-12-07 00:51:17,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 4.096774193548387) internal successors, (127), 32 states have internal predecessors, (127), 17 states have call successors, (46), 7 states have call predecessors, (46), 10 states have return successors, (45), 14 states have call predecessors, (45), 17 states have call successors, (45) [2021-12-07 00:51:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 448 transitions. [2021-12-07 00:51:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-07 00:51:17,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:17,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-07 00:51:17,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-07 00:51:17,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:17,657 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2040741793, now seen corresponding path program 1 times [2021-12-07 00:51:17,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:17,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314170696] [2021-12-07 00:51:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:17,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:51:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:51:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-07 00:51:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-07 00:51:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:51:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-07 00:51:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-07 00:51:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 00:51:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 00:51:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 00:51:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 00:51:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 00:51:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 00:51:17,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314170696] [2021-12-07 00:51:17,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314170696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210342674] [2021-12-07 00:51:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:17,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:17,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:17,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:51:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:51:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:51:18,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:51:18,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210342674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:51:18,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:51:18,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-07 00:51:18,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254191486] [2021-12-07 00:51:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:51:18,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:51:18,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:51:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:51:18,373 INFO L87 Difference]: Start difference. First operand 325 states and 448 transitions. Second operand has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:51:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:18,473 INFO L93 Difference]: Finished difference Result 487 states and 673 transitions. [2021-12-07 00:51:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:51:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 124 [2021-12-07 00:51:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:18,476 INFO L225 Difference]: With dead ends: 487 [2021-12-07 00:51:18,476 INFO L226 Difference]: Without dead ends: 330 [2021-12-07 00:51:18,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:51:18,477 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 11 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:18,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1258 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:51:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-07 00:51:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2021-12-07 00:51:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 203 states have internal predecessors, (228), 96 states have call successors, (96), 26 states have call predecessors, (96), 29 states have return successors, (122), 95 states have call predecessors, (122), 94 states have call successors, (122) [2021-12-07 00:51:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 446 transitions. [2021-12-07 00:51:18,497 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 446 transitions. Word has length 124 [2021-12-07 00:51:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:18,497 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 446 transitions. [2021-12-07 00:51:18,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:51:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 446 transitions. [2021-12-07 00:51:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-07 00:51:18,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:18,499 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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] [2021-12-07 00:51:18,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:51:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:51:18,700 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash -153440338, now seen corresponding path program 2 times [2021-12-07 00:51:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:18,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771045485] [2021-12-07 00:51:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:51:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:51:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:51:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:51:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:51:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:51:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 00:51:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:51:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:51:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:51:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-07 00:51:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:51:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-07 00:51:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-07 00:51:19,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771045485] [2021-12-07 00:51:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771045485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818922271] [2021-12-07 00:51:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:51:19,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:19,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:19,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:51:19,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:51:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:51:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:20,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:51:20,240 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 26 treesize of output 26 [2021-12-07 00:51:20,262 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 27 treesize of output 15 [2021-12-07 00:51:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 80 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-07 00:51:20,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:20,471 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| v_ArrVal_966) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-12-07 00:51:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818922271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:20,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:20,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-12-07 00:51:20,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731144321] [2021-12-07 00:51:20,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:51:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:51:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=325, Unknown=1, NotChecked=36, Total=420 [2021-12-07 00:51:20,477 INFO L87 Difference]: Start difference. First operand 325 states and 446 transitions. Second operand has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 9 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (34), 7 states have call predecessors, (34), 9 states have call successors, (34) [2021-12-07 00:51:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:21,334 INFO L93 Difference]: Finished difference Result 500 states and 685 transitions. [2021-12-07 00:51:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:51:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 9 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (34), 7 states have call predecessors, (34), 9 states have call successors, (34) Word has length 127 [2021-12-07 00:51:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:21,337 INFO L225 Difference]: With dead ends: 500 [2021-12-07 00:51:21,337 INFO L226 Difference]: Without dead ends: 346 [2021-12-07 00:51:21,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=687, Unknown=1, NotChecked=54, Total=870 [2021-12-07 00:51:21,339 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 213 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:21,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 764 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1141 Invalid, 0 Unknown, 194 Unchecked, 0.7s Time] [2021-12-07 00:51:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-07 00:51:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 283. [2021-12-07 00:51:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 178 states have (on average 1.1404494382022472) internal successors, (203), 181 states have internal predecessors, (203), 76 states have call successors, (76), 26 states have call predecessors, (76), 28 states have return successors, (95), 75 states have call predecessors, (95), 74 states have call successors, (95) [2021-12-07 00:51:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 374 transitions. [2021-12-07 00:51:21,358 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 374 transitions. Word has length 127 [2021-12-07 00:51:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 374 transitions. [2021-12-07 00:51:21,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 9 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (34), 7 states have call predecessors, (34), 9 states have call successors, (34) [2021-12-07 00:51:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 374 transitions. [2021-12-07 00:51:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 00:51:21,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:21,360 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-07 00:51:21,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:51:21,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:51:21,561 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2001210328, now seen corresponding path program 2 times [2021-12-07 00:51:21,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:21,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917770662] [2021-12-07 00:51:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:21,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:51:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:51:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:51:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:51:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:51:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:51:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:51:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:51:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-07 00:51:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:51:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-07 00:51:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:51:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:51:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 00:51:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-07 00:51:21,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917770662] [2021-12-07 00:51:21,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917770662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435335839] [2021-12-07 00:51:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:51:21,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:21,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:21,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:51:22,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:51:22,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-07 00:51:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:22,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:51:22,842 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 00:51:22,842 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 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-07 00:51:24,084 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10| Int) (|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10|) 0) (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|)) (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_10| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|)))) is different from true [2021-12-07 00:51:25,246 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_11|) 0) (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|)))) is different from true [2021-12-07 00:51:26,467 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12|) 0)) (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_12| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|)))) is different from true [2021-12-07 00:51:27,597 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_13|) 0) (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|)))) is different from true [2021-12-07 00:51:28,861 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_14| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_14| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_14|) 0)))) is different from true [2021-12-07 00:51:35,450 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base_20| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset_20| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_15| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_15|) 0))) (and (not (= |v_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base_20| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_15|)) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base_20|) |v_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset_20|)) (or (= (mod .cse0 18446744073709551616) 0) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_15|) 8) 0)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_15|) 8) 0)))))) is different from true [2021-12-07 00:51:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 48 not checked. [2021-12-07 00:51:47,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435335839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:48,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:48,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29] total 41 [2021-12-07 00:51:48,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502030708] [2021-12-07 00:51:48,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 00:51:48,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 00:51:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2175, Unknown=6, NotChecked=594, Total=2970 [2021-12-07 00:51:48,416 INFO L87 Difference]: Start difference. First operand 283 states and 374 transitions. Second operand has 41 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) [2021-12-07 00:53:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:41,861 INFO L93 Difference]: Finished difference Result 633 states and 907 transitions. [2021-12-07 00:53:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:53:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) Word has length 126 [2021-12-07 00:53:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:41,865 INFO L225 Difference]: With dead ends: 633 [2021-12-07 00:53:41,865 INFO L226 Difference]: Without dead ends: 531 [2021-12-07 00:53:41,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 139 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 136.4s TimeCoverageRelationStatistics Valid=416, Invalid=4975, Unknown=35, NotChecked=894, Total=6320 [2021-12-07 00:53:41,868 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 122 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 6696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4997 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:41,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 2735 Invalid, 6696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1601 Invalid, 0 Unknown, 4997 Unchecked, 1.1s Time] [2021-12-07 00:53:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-07 00:53:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 382. [2021-12-07 00:53:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 242 states have (on average 1.140495867768595) internal successors, (276), 247 states have internal predecessors, (276), 105 states have call successors, (105), 31 states have call predecessors, (105), 34 states have return successors, (159), 103 states have call predecessors, (159), 103 states have call successors, (159) [2021-12-07 00:53:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 540 transitions. [2021-12-07 00:53:41,914 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 540 transitions. Word has length 126 [2021-12-07 00:53:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 540 transitions. [2021-12-07 00:53:41,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) [2021-12-07 00:53:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 540 transitions. [2021-12-07 00:53:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 00:53:41,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:41,917 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-12-07 00:53:41,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:53:42,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:53:42,118 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -103713562, now seen corresponding path program 1 times [2021-12-07 00:53:42,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119158012] [2021-12-07 00:53:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:42,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:53:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:53:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:53:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:53:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:53:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:53:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:53:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:53:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:53:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-07 00:53:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:53:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-07 00:53:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 00:53:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-07 00:53:42,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119158012] [2021-12-07 00:53:42,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119158012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103507676] [2021-12-07 00:53:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:42,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:42,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:53:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:53:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-07 00:53:42,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:53:42,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103507676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:53:42,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:53:42,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-07 00:53:42,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404424373] [2021-12-07 00:53:42,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:53:42,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:53:42,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:53:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:53:42,621 INFO L87 Difference]: Start difference. First operand 382 states and 540 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-07 00:53:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:42,651 INFO L93 Difference]: Finished difference Result 663 states and 937 transitions. [2021-12-07 00:53:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:53:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 126 [2021-12-07 00:53:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:42,654 INFO L225 Difference]: With dead ends: 663 [2021-12-07 00:53:42,654 INFO L226 Difference]: Without dead ends: 358 [2021-12-07 00:53:42,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:53:42,656 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 6 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:42,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 499 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:53:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-07 00:53:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 349. [2021-12-07 00:53:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 222 states have internal predecessors, (248), 98 states have call successors, (98), 30 states have call predecessors, (98), 32 states have return successors, (129), 96 states have call predecessors, (129), 96 states have call successors, (129) [2021-12-07 00:53:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 475 transitions. [2021-12-07 00:53:42,677 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 475 transitions. Word has length 126 [2021-12-07 00:53:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:42,677 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 475 transitions. [2021-12-07 00:53:42,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-07 00:53:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 475 transitions. [2021-12-07 00:53:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 00:53:42,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:42,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-12-07 00:53:42,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:53:42,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:53:42,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -226410282, now seen corresponding path program 1 times [2021-12-07 00:53:42,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039075887] [2021-12-07 00:53:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:42,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:53:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:53:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:53:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:53:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:53:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:53:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:53:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:53:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:53:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:53:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:53:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:53:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:53:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:53:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:53:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-07 00:53:43,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:43,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039075887] [2021-12-07 00:53:43,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039075887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:53:43,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:53:43,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:53:43,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962029097] [2021-12-07 00:53:43,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:53:43,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:53:43,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:53:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:53:43,122 INFO L87 Difference]: Start difference. First operand 349 states and 475 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-07 00:53:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:43,496 INFO L93 Difference]: Finished difference Result 364 states and 491 transitions. [2021-12-07 00:53:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:53:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 125 [2021-12-07 00:53:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:43,499 INFO L225 Difference]: With dead ends: 364 [2021-12-07 00:53:43,499 INFO L226 Difference]: Without dead ends: 362 [2021-12-07 00:53:43,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:53:43,500 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 66 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:43,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 890 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:53:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-07 00:53:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 359. [2021-12-07 00:53:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 224 states have (on average 1.1339285714285714) internal successors, (254), 228 states have internal predecessors, (254), 100 states have call successors, (100), 32 states have call predecessors, (100), 34 states have return successors, (131), 98 states have call predecessors, (131), 98 states have call successors, (131) [2021-12-07 00:53:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 485 transitions. [2021-12-07 00:53:43,530 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 485 transitions. Word has length 125 [2021-12-07 00:53:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:43,530 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 485 transitions. [2021-12-07 00:53:43,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-07 00:53:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 485 transitions. [2021-12-07 00:53:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:53:43,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:43,533 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:43,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:53:43,533 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1216960639, now seen corresponding path program 3 times [2021-12-07 00:53:43,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:43,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862457879] [2021-12-07 00:53:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:43,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:53:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:53:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:53:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:53:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:53:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:53:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:53:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:53:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:53:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:53:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:53:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:53:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 00:53:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:53:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:53:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 00:53:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-07 00:53:44,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:44,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862457879] [2021-12-07 00:53:44,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862457879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:44,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834239962] [2021-12-07 00:53:44,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:53:44,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:44,366 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:44,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:53:45,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:53:45,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:53:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2382 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-07 00:53:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:47,836 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20| Int)) (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20|) 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19|) (+ 8 |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20|)) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.base_BEFORE_CALL_19|) (+ 8 |v_ULTIMATE.start_aws_byte_cursor_eq_~a#1.offset_BEFORE_CALL_20|)) 0)))) is different from true [2021-12-07 00:54:01,107 WARN L227 SmtUtils]: Spent 11.14s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:54:14,719 WARN L227 SmtUtils]: Spent 13.50s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:54:28,930 WARN L227 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:54:41,113 WARN L227 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:54:53,296 WARN L227 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:07,406 WARN L227 SmtUtils]: Spent 11.95s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:20,193 WARN L227 SmtUtils]: Spent 12.63s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:36,328 WARN L227 SmtUtils]: Spent 11.97s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:48,464 WARN L227 SmtUtils]: Spent 11.98s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:55:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 00:55:48,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834239962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:53,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:55:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-12-07 00:55:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84327462] [2021-12-07 00:55:53,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:53,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:55:53,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:55:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2197, Unknown=6, NotChecked=94, Total=2450 [2021-12-07 00:55:53,625 INFO L87 Difference]: Start difference. First operand 359 states and 485 transitions. Second operand has 37 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 14 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-07 00:56:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:36,467 INFO L93 Difference]: Finished difference Result 770 states and 1178 transitions. [2021-12-07 00:56:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 00:56:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 14 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) Word has length 133 [2021-12-07 00:56:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:36,472 INFO L225 Difference]: With dead ends: 770 [2021-12-07 00:56:36,472 INFO L226 Difference]: Without dead ends: 666 [2021-12-07 00:56:36,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 166.8s TimeCoverageRelationStatistics Valid=490, Invalid=6805, Unknown=19, NotChecked=168, Total=7482 [2021-12-07 00:56:36,475 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 344 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 5063 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 7938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 5063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2541 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:36,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1967 Invalid, 7938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 5063 Invalid, 0 Unknown, 2541 Unchecked, 3.6s Time] [2021-12-07 00:56:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-07 00:56:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 410. [2021-12-07 00:56:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 253 states have (on average 1.134387351778656) internal successors, (287), 259 states have internal predecessors, (287), 118 states have call successors, (118), 34 states have call predecessors, (118), 38 states have return successors, (163), 116 states have call predecessors, (163), 116 states have call successors, (163) [2021-12-07 00:56:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 568 transitions. [2021-12-07 00:56:36,527 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 568 transitions. Word has length 133 [2021-12-07 00:56:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:36,527 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 568 transitions. [2021-12-07 00:56:36,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 14 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (36), 11 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-07 00:56:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 568 transitions. [2021-12-07 00:56:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:56:36,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:36,530 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-12-07 00:56:36,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:56:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:36,731 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1912923741, now seen corresponding path program 1 times [2021-12-07 00:56:36,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:36,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448510288] [2021-12-07 00:56:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:36,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:56:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:56:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:56:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:56:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:56:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 00:56:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 00:56:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 00:56:37,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448510288] [2021-12-07 00:56:37,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448510288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:37,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:37,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:56:37,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777485589] [2021-12-07 00:56:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:56:37,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:56:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:56:37,029 INFO L87 Difference]: Start difference. First operand 410 states and 568 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 00:56:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:37,307 INFO L93 Difference]: Finished difference Result 632 states and 888 transitions. [2021-12-07 00:56:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:56:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2021-12-07 00:56:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:37,311 INFO L225 Difference]: With dead ends: 632 [2021-12-07 00:56:37,311 INFO L226 Difference]: Without dead ends: 399 [2021-12-07 00:56:37,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:56:37,313 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 106 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:37,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 353 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:56:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-07 00:56:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-12-07 00:56:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 243 states have (on average 1.123456790123457) internal successors, (273), 248 states have internal predecessors, (273), 118 states have call successors, (118), 34 states have call predecessors, (118), 37 states have return successors, (161), 116 states have call predecessors, (161), 116 states have call successors, (161) [2021-12-07 00:56:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2021-12-07 00:56:37,359 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 133 [2021-12-07 00:56:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:37,360 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2021-12-07 00:56:37,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 00:56:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2021-12-07 00:56:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-07 00:56:37,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:37,362 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:37,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:56:37,362 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 980116838, now seen corresponding path program 1 times [2021-12-07 00:56:37,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:37,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568584102] [2021-12-07 00:56:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:37,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:56:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:56:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:56:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:56:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:56:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 00:56:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 00:56:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-07 00:56:37,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568584102] [2021-12-07 00:56:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568584102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:37,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:37,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-07 00:56:37,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323713393] [2021-12-07 00:56:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:37,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:56:37,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:56:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:56:37,660 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 00:56:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:38,375 INFO L93 Difference]: Finished difference Result 410 states and 563 transitions. [2021-12-07 00:56:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:56:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 135 [2021-12-07 00:56:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:38,378 INFO L225 Difference]: With dead ends: 410 [2021-12-07 00:56:38,378 INFO L226 Difference]: Without dead ends: 408 [2021-12-07 00:56:38,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:56:38,379 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 134 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:38,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1262 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:56:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-07 00:56:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 397. [2021-12-07 00:56:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 243 states have (on average 1.123456790123457) internal successors, (273), 248 states have internal predecessors, (273), 116 states have call successors, (116), 34 states have call predecessors, (116), 37 states have return successors, (159), 114 states have call predecessors, (159), 114 states have call successors, (159) [2021-12-07 00:56:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 548 transitions. [2021-12-07 00:56:38,409 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 548 transitions. Word has length 135 [2021-12-07 00:56:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:38,410 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 548 transitions. [2021-12-07 00:56:38,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-07 00:56:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 548 transitions. [2021-12-07 00:56:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 00:56:38,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:38,412 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:38,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:56:38,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1995646750, now seen corresponding path program 1 times [2021-12-07 00:56:38,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207098714] [2021-12-07 00:56:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:38,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:56:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:56:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:56:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:56:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:56:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:56:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:56:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:56:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-07 00:56:38,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207098714] [2021-12-07 00:56:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207098714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857547145] [2021-12-07 00:56:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:38,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:38,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:38,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:56:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 00:56:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:39,042 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 6 treesize of output 5 [2021-12-07 00:56:39,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:39,263 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:56:39,263 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 1 case distinctions, treesize of input 40 treesize of output 35 [2021-12-07 00:56:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 49 proven. 22 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 00:56:40,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:40,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857547145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:40,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:40,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2021-12-07 00:56:40,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826845960] [2021-12-07 00:56:40,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:40,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:56:40,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:56:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:56:40,591 INFO L87 Difference]: Start difference. First operand 397 states and 548 transitions. Second operand has 24 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 11 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-07 00:56:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:42,208 INFO L93 Difference]: Finished difference Result 601 states and 818 transitions. [2021-12-07 00:56:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:56:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 11 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) Word has length 129 [2021-12-07 00:56:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:42,211 INFO L225 Difference]: With dead ends: 601 [2021-12-07 00:56:42,211 INFO L226 Difference]: Without dead ends: 459 [2021-12-07 00:56:42,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=381, Invalid=2271, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 00:56:42,213 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 273 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1001 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1192 Invalid, 0 Unknown, 433 Unchecked, 0.8s Time] [2021-12-07 00:56:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-07 00:56:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 426. [2021-12-07 00:56:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 259 states have (on average 1.1158301158301158) internal successors, (289), 264 states have internal predecessors, (289), 127 states have call successors, (127), 36 states have call predecessors, (127), 39 states have return successors, (172), 125 states have call predecessors, (172), 125 states have call successors, (172) [2021-12-07 00:56:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 588 transitions. [2021-12-07 00:56:42,246 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 588 transitions. Word has length 129 [2021-12-07 00:56:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:42,247 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 588 transitions. [2021-12-07 00:56:42,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 11 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-07 00:56:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 588 transitions. [2021-12-07 00:56:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:56:42,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:42,249 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1] [2021-12-07 00:56:42,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:56:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:42,450 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1055067176, now seen corresponding path program 1 times [2021-12-07 00:56:42,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319632854] [2021-12-07 00:56:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:42,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:56:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:56:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:56:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:56:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:56:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:56:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:56:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:56:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:56:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 00:56:42,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:42,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319632854] [2021-12-07 00:56:42,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319632854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:42,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:42,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 00:56:42,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151011181] [2021-12-07 00:56:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:42,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:56:42,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:56:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:56:42,964 INFO L87 Difference]: Start difference. First operand 426 states and 588 transitions. Second operand has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 00:56:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:43,674 INFO L93 Difference]: Finished difference Result 484 states and 684 transitions. [2021-12-07 00:56:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:56:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 133 [2021-12-07 00:56:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:43,677 INFO L225 Difference]: With dead ends: 484 [2021-12-07 00:56:43,677 INFO L226 Difference]: Without dead ends: 482 [2021-12-07 00:56:43,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:56:43,678 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 216 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:43,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 651 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:56:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-07 00:56:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 459. [2021-12-07 00:56:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 275 states have (on average 1.1127272727272728) internal successors, (306), 280 states have internal predecessors, (306), 142 states have call successors, (142), 38 states have call predecessors, (142), 41 states have return successors, (194), 140 states have call predecessors, (194), 140 states have call successors, (194) [2021-12-07 00:56:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 642 transitions. [2021-12-07 00:56:43,716 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 642 transitions. Word has length 133 [2021-12-07 00:56:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:43,716 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 642 transitions. [2021-12-07 00:56:43,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 00:56:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 642 transitions. [2021-12-07 00:56:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:56:43,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:43,719 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:43,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:56:43,719 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1546131138, now seen corresponding path program 1 times [2021-12-07 00:56:43,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:43,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995381547] [2021-12-07 00:56:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:43,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:56:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:56:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:56:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:56:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 00:56:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:56:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 00:56:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-07 00:56:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:56:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 00:56:44,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:44,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995381547] [2021-12-07 00:56:44,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995381547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:44,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337617394] [2021-12-07 00:56:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:44,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:44,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:44,006 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:44,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:56:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:44,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 00:56:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 00:56:44,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:56:44,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337617394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:44,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:56:44,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-07 00:56:44,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668958800] [2021-12-07 00:56:44,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:44,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:56:44,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:56:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:56:44,413 INFO L87 Difference]: Start difference. First operand 459 states and 642 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-07 00:56:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:44,540 INFO L93 Difference]: Finished difference Result 599 states and 831 transitions. [2021-12-07 00:56:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:56:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 145 [2021-12-07 00:56:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:44,543 INFO L225 Difference]: With dead ends: 599 [2021-12-07 00:56:44,544 INFO L226 Difference]: Without dead ends: 445 [2021-12-07 00:56:44,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:56:44,545 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 10 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:44,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1235 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-07 00:56:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 440. [2021-12-07 00:56:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 268 states have (on average 1.1156716417910448) internal successors, (299), 273 states have internal predecessors, (299), 130 states have call successors, (130), 38 states have call predecessors, (130), 41 states have return successors, (169), 128 states have call predecessors, (169), 128 states have call successors, (169) [2021-12-07 00:56:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 598 transitions. [2021-12-07 00:56:44,582 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 598 transitions. Word has length 145 [2021-12-07 00:56:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 598 transitions. [2021-12-07 00:56:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-07 00:56:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 598 transitions. [2021-12-07 00:56:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 00:56:44,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:44,584 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:44,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:56:44,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:44,786 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 430376462, now seen corresponding path program 1 times [2021-12-07 00:56:44,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403817730] [2021-12-07 00:56:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:44,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:44,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:56:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:56:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:56:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:56:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-07 00:56:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 00:56:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-07 00:56:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-07 00:56:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 00:56:45,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403817730] [2021-12-07 00:56:45,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403817730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314094282] [2021-12-07 00:56:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:45,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:45,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:56:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2770 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 00:56:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:48,419 INFO L354 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2021-12-07 00:56:48,420 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 1 case distinctions, treesize of input 31 treesize of output 40 [2021-12-07 00:56:48,424 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 17 treesize of output 13 [2021-12-07 00:56:48,427 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 17 treesize of output 13 [2021-12-07 00:56:48,431 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 31 treesize of output 23 [2021-12-07 00:56:48,434 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 33 treesize of output 25 [2021-12-07 00:56:48,613 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 31 treesize of output 19 [2021-12-07 00:56:48,618 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 25 treesize of output 13 [2021-12-07 00:56:48,622 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 00:56:48,622 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 35 treesize of output 19 [2021-12-07 00:56:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-07 00:56:48,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314094282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:49,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:49,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2021-12-07 00:56:49,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885448625] [2021-12-07 00:56:49,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:49,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:56:49,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:56:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1128, Unknown=1, NotChecked=0, Total=1260 [2021-12-07 00:56:49,648 INFO L87 Difference]: Start difference. First operand 440 states and 598 transitions. Second operand has 31 states, 29 states have (on average 4.517241379310345) internal successors, (131), 29 states have internal predecessors, (131), 11 states have call successors, (39), 7 states have call predecessors, (39), 10 states have return successors, (38), 9 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-07 00:56:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:56,653 INFO L93 Difference]: Finished difference Result 558 states and 739 transitions. [2021-12-07 00:56:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:56:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.517241379310345) internal successors, (131), 29 states have internal predecessors, (131), 11 states have call successors, (39), 7 states have call predecessors, (39), 10 states have return successors, (38), 9 states have call predecessors, (38), 11 states have call successors, (38) Word has length 140 [2021-12-07 00:56:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:56,656 INFO L225 Difference]: With dead ends: 558 [2021-12-07 00:56:56,656 INFO L226 Difference]: Without dead ends: 417 [2021-12-07 00:56:56,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=557, Invalid=3472, Unknown=3, NotChecked=0, Total=4032 [2021-12-07 00:56:56,658 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 498 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:56,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 850 Invalid, 3371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2297 Invalid, 0 Unknown, 573 Unchecked, 1.5s Time] [2021-12-07 00:56:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-12-07 00:56:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 396. [2021-12-07 00:56:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 243 states have (on average 1.1152263374485596) internal successors, (271), 248 states have internal predecessors, (271), 112 states have call successors, (112), 37 states have call predecessors, (112), 40 states have return successors, (143), 110 states have call predecessors, (143), 110 states have call successors, (143) [2021-12-07 00:56:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 526 transitions. [2021-12-07 00:56:56,688 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 526 transitions. Word has length 140 [2021-12-07 00:56:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:56,689 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 526 transitions. [2021-12-07 00:56:56,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.517241379310345) internal successors, (131), 29 states have internal predecessors, (131), 11 states have call successors, (39), 7 states have call predecessors, (39), 10 states have return successors, (38), 9 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-07 00:56:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 526 transitions. [2021-12-07 00:56:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 00:56:56,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:56,691 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 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, 1, 1, 1] [2021-12-07 00:56:56,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:56:56,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-07 00:56:56,892 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -820063931, now seen corresponding path program 2 times [2021-12-07 00:56:56,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:56,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538805647] [2021-12-07 00:56:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:56,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:56:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:56:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:56:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:56:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:56:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:56:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:56:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:56:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:56:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:56:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:56:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:56:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 00:56:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:56:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:56:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-07 00:56:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-07 00:56:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-07 00:56:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-07 00:56:57,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538805647] [2021-12-07 00:56:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538805647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453179927] [2021-12-07 00:56:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:56:57,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:57,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:57,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:56:57,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:57,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2815 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 00:56:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:56:58,084 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-07 00:56:58,084 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 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-07 00:56:58,087 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 17 treesize of output 20 [2021-12-07 00:56:58,090 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 16 treesize of output 15 [2021-12-07 00:56:58,095 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 17 treesize of output 20 [2021-12-07 00:56:58,097 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 16 treesize of output 15 [2021-12-07 00:56:58,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2021-12-07 00:56:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-12-07 00:56:58,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-12-07 00:56:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 86 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 00:56:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:59,905 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 114 treesize of output 96 [2021-12-07 00:56:59,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 93 [2021-12-07 00:56:59,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2021-12-07 00:56:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 111 [2021-12-07 00:56:59,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:59,930 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 143 treesize of output 145 [2021-12-07 00:56:59,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-07 00:56:59,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:56:59,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:56:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 00:57:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:57:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-07 00:57:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453179927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:00,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:00,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 38 [2021-12-07 00:57:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537310873] [2021-12-07 00:57:00,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:57:00,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:57:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:57:00,099 INFO L87 Difference]: Start difference. First operand 396 states and 526 transitions. Second operand has 38 states, 33 states have (on average 4.212121212121212) internal successors, (139), 31 states have internal predecessors, (139), 14 states have call successors, (48), 7 states have call predecessors, (48), 9 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2021-12-07 00:57:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:01,997 INFO L93 Difference]: Finished difference Result 586 states and 769 transitions. [2021-12-07 00:57:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 00:57:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 4.212121212121212) internal successors, (139), 31 states have internal predecessors, (139), 14 states have call successors, (48), 7 states have call predecessors, (48), 9 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) Word has length 147 [2021-12-07 00:57:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:02,000 INFO L225 Difference]: With dead ends: 586 [2021-12-07 00:57:02,000 INFO L226 Difference]: Without dead ends: 443 [2021-12-07 00:57:02,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=3162, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 00:57:02,002 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 153 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:02,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 2799 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1636 Invalid, 0 Unknown, 345 Unchecked, 1.0s Time] [2021-12-07 00:57:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-07 00:57:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 435. [2021-12-07 00:57:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 275 states have (on average 1.1090909090909091) internal successors, (305), 282 states have internal predecessors, (305), 112 states have call successors, (112), 42 states have call predecessors, (112), 47 states have return successors, (141), 110 states have call predecessors, (141), 110 states have call successors, (141) [2021-12-07 00:57:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 558 transitions. [2021-12-07 00:57:02,034 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 558 transitions. Word has length 147 [2021-12-07 00:57:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:02,034 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 558 transitions. [2021-12-07 00:57:02,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 4.212121212121212) internal successors, (139), 31 states have internal predecessors, (139), 14 states have call successors, (48), 7 states have call predecessors, (48), 9 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2021-12-07 00:57:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 558 transitions. [2021-12-07 00:57:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 00:57:02,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:02,036 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:02,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:57:02,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 00:57:02,237 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash 15876341, now seen corresponding path program 1 times [2021-12-07 00:57:02,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:02,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759259824] [2021-12-07 00:57:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:02,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-07 00:57:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:02,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759259824] [2021-12-07 00:57:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759259824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:02,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:02,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 00:57:02,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181720129] [2021-12-07 00:57:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:02,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:57:02,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:57:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:57:02,571 INFO L87 Difference]: Start difference. First operand 435 states and 558 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:57:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:03,310 INFO L93 Difference]: Finished difference Result 466 states and 605 transitions. [2021-12-07 00:57:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:57:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 140 [2021-12-07 00:57:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:03,313 INFO L225 Difference]: With dead ends: 466 [2021-12-07 00:57:03,313 INFO L226 Difference]: Without dead ends: 464 [2021-12-07 00:57:03,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:57:03,314 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 161 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:03,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 674 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:57:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-07 00:57:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 439. [2021-12-07 00:57:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 278 states have (on average 1.1079136690647482) internal successors, (308), 285 states have internal predecessors, (308), 112 states have call successors, (112), 43 states have call predecessors, (112), 48 states have return successors, (141), 110 states have call predecessors, (141), 110 states have call successors, (141) [2021-12-07 00:57:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 561 transitions. [2021-12-07 00:57:03,345 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 561 transitions. Word has length 140 [2021-12-07 00:57:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:03,345 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 561 transitions. [2021-12-07 00:57:03,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:57:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 561 transitions. [2021-12-07 00:57:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-07 00:57:03,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:03,347 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-12-07 00:57:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-07 00:57:03,347 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1789966104, now seen corresponding path program 1 times [2021-12-07 00:57:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064331822] [2021-12-07 00:57:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-07 00:57:03,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064331822] [2021-12-07 00:57:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064331822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:03,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:03,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 00:57:03,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683010213] [2021-12-07 00:57:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:03,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:57:03,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:57:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:57:03,542 INFO L87 Difference]: Start difference. First operand 439 states and 561 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-07 00:57:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:03,869 INFO L93 Difference]: Finished difference Result 605 states and 794 transitions. [2021-12-07 00:57:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:57:03,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2021-12-07 00:57:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:03,872 INFO L225 Difference]: With dead ends: 605 [2021-12-07 00:57:03,872 INFO L226 Difference]: Without dead ends: 517 [2021-12-07 00:57:03,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:57:03,873 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 133 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:03,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 943 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-07 00:57:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 469. [2021-12-07 00:57:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 293 states have (on average 1.1023890784982935) internal successors, (323), 299 states have internal predecessors, (323), 126 states have call successors, (126), 43 states have call predecessors, (126), 49 states have return successors, (159), 126 states have call predecessors, (159), 124 states have call successors, (159) [2021-12-07 00:57:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 608 transitions. [2021-12-07 00:57:03,908 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 608 transitions. Word has length 141 [2021-12-07 00:57:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:03,908 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 608 transitions. [2021-12-07 00:57:03,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-07 00:57:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 608 transitions. [2021-12-07 00:57:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-07 00:57:03,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:03,910 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-12-07 00:57:03,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 00:57:03,910 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1321653895, now seen corresponding path program 1 times [2021-12-07 00:57:03,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:03,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144301002] [2021-12-07 00:57:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:03,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-07 00:57:04,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144301002] [2021-12-07 00:57:04,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144301002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:04,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:57:04,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320661118] [2021-12-07 00:57:04,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:57:04,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:57:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:57:04,138 INFO L87 Difference]: Start difference. First operand 469 states and 608 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-07 00:57:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,493 INFO L93 Difference]: Finished difference Result 481 states and 620 transitions. [2021-12-07 00:57:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 141 [2021-12-07 00:57:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,496 INFO L225 Difference]: With dead ends: 481 [2021-12-07 00:57:04,496 INFO L226 Difference]: Without dead ends: 479 [2021-12-07 00:57:04,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:57:04,497 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 112 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 852 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-07 00:57:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2021-12-07 00:57:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 299 states have (on average 1.100334448160535) internal successors, (329), 305 states have internal predecessors, (329), 127 states have call successors, (127), 45 states have call predecessors, (127), 51 states have return successors, (160), 127 states have call predecessors, (160), 125 states have call successors, (160) [2021-12-07 00:57:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 616 transitions. [2021-12-07 00:57:04,531 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 616 transitions. Word has length 141 [2021-12-07 00:57:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,531 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 616 transitions. [2021-12-07 00:57:04,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-07 00:57:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 616 transitions. [2021-12-07 00:57:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-07 00:57:04,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,533 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-12-07 00:57:04,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 00:57:04,533 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,534 INFO L85 PathProgramCache]: Analyzing trace with hash 242706633, now seen corresponding path program 1 times [2021-12-07 00:57:04,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764917723] [2021-12-07 00:57:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:57:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:57:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 00:57:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-07 00:57:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-07 00:57:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:57:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-07 00:57:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-07 00:57:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-07 00:57:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-07 00:57:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-07 00:57:05,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764917723] [2021-12-07 00:57:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764917723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785990223] [2021-12-07 00:57:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:05,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:05,185 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:05,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:57:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2818 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 00:57:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:05,559 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 [2021-12-07 00:57:05,562 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 [2021-12-07 00:57:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-07 00:57:06,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:06,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785990223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:06,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:57:06,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 33 [2021-12-07 00:57:06,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874460317] [2021-12-07 00:57:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:06,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:57:06,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:57:06,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 00:57:06,111 INFO L87 Difference]: Start difference. First operand 478 states and 616 transitions. Second operand has 13 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:57:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:06,330 INFO L93 Difference]: Finished difference Result 931 states and 1279 transitions. [2021-12-07 00:57:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:57:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 148 [2021-12-07 00:57:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:06,334 INFO L225 Difference]: With dead ends: 931 [2021-12-07 00:57:06,334 INFO L226 Difference]: Without dead ends: 625 [2021-12-07 00:57:06,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:57:06,336 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 52 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:06,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2159 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2021-12-07 00:57:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-07 00:57:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 453. [2021-12-07 00:57:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 291 states have (on average 1.0962199312714778) internal successors, (319), 297 states have internal predecessors, (319), 110 states have call successors, (110), 45 states have call predecessors, (110), 51 states have return successors, (138), 110 states have call predecessors, (138), 108 states have call successors, (138) [2021-12-07 00:57:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 567 transitions. [2021-12-07 00:57:06,369 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 567 transitions. Word has length 148 [2021-12-07 00:57:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 567 transitions. [2021-12-07 00:57:06,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:57:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 567 transitions. [2021-12-07 00:57:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-07 00:57:06,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:06,371 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:06,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:57:06,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:57:06,573 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1137358196, now seen corresponding path program 1 times [2021-12-07 00:57:06,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:06,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582324749] [2021-12-07 00:57:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:06,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 00:57:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 00:57:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 00:57:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 00:57:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:57:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 00:57:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 00:57:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-07 00:57:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 00:57:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 00:57:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 00:57:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-07 00:57:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-07 00:57:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-07 00:57:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-07 00:57:07,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582324749] [2021-12-07 00:57:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582324749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694315610] [2021-12-07 00:57:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:07,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:07,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:07,349 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:07,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:57:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2852 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 00:57:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:07,702 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:57:07,702 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:57:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:57:08,242 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-12-07 00:57:08,242 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 29 treesize of output 33 [2021-12-07 00:57:08,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-07 00:57:08,926 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 30 treesize of output 18 [2021-12-07 00:57:08,971 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:57:08,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 00:57:09,126 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 6 treesize of output 5 [2021-12-07 00:57:09,140 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2246 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_2246) |c_#memory_$Pointer$.base|)) (< 0 |c_#StackHeapBarrier|)) is different from true [2021-12-07 00:57:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 00:57:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-07 00:57:09,990 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-07 00:57:09,990 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 28 treesize of output 1 [2021-12-07 00:57:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 127 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 2 not checked. [2021-12-07 00:57:10,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:12,919 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 39 treesize of output 27 [2021-12-07 00:57:12,990 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2250 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#old_byte_from_lhs~0#1.base| v_ArrVal_2250) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| 8)) 0))) (<= 0 |c_#StackHeapBarrier|)) is different from false [2021-12-07 00:57:12,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694315610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:12,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:12,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 53 [2021-12-07 00:57:12,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524917627] [2021-12-07 00:57:12,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:12,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 00:57:12,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 00:57:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3210, Unknown=4, NotChecked=230, Total=3660 [2021-12-07 00:57:12,993 INFO L87 Difference]: Start difference. First operand 453 states and 567 transitions. Second operand has 53 states, 49 states have (on average 3.306122448979592) internal successors, (162), 43 states have internal predecessors, (162), 16 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) [2021-12-07 00:57:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:19,200 INFO L93 Difference]: Finished difference Result 1009 states and 1273 transitions. [2021-12-07 00:57:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-07 00:57:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 3.306122448979592) internal successors, (162), 43 states have internal predecessors, (162), 16 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) Word has length 158 [2021-12-07 00:57:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:19,204 INFO L225 Difference]: With dead ends: 1009 [2021-12-07 00:57:19,204 INFO L226 Difference]: Without dead ends: 884 [2021-12-07 00:57:19,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 245 SyntacticMatches, 18 SemanticMatches, 115 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1095, Invalid=12012, Unknown=11, NotChecked=454, Total=13572 [2021-12-07 00:57:19,206 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 524 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 5270 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 2338 SdHoareTripleChecker+Invalid, 8640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 5270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2777 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:19,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 2338 Invalid, 8640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 5270 Invalid, 0 Unknown, 2777 Unchecked, 3.0s Time] [2021-12-07 00:57:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-07 00:57:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 764. [2021-12-07 00:57:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 489 states have (on average 1.098159509202454) internal successors, (537), 497 states have internal predecessors, (537), 189 states have call successors, (189), 76 states have call predecessors, (189), 85 states have return successors, (243), 190 states have call predecessors, (243), 186 states have call successors, (243) [2021-12-07 00:57:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 969 transitions. [2021-12-07 00:57:19,259 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 969 transitions. Word has length 158 [2021-12-07 00:57:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:19,259 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 969 transitions. [2021-12-07 00:57:19,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 3.306122448979592) internal successors, (162), 43 states have internal predecessors, (162), 16 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) [2021-12-07 00:57:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 969 transitions. [2021-12-07 00:57:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-07 00:57:19,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:19,262 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:19,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:57:19,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:57:19,463 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1373340819, now seen corresponding path program 1 times [2021-12-07 00:57:19,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:19,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563312151] [2021-12-07 00:57:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:19,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-07 00:57:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-07 00:57:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-07 00:57:19,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563312151] [2021-12-07 00:57:19,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563312151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:19,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:19,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:57:19,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11347476] [2021-12-07 00:57:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:19,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:57:19,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:57:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:57:19,753 INFO L87 Difference]: Start difference. First operand 764 states and 969 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-07 00:57:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:20,139 INFO L93 Difference]: Finished difference Result 784 states and 991 transitions. [2021-12-07 00:57:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 155 [2021-12-07 00:57:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:20,143 INFO L225 Difference]: With dead ends: 784 [2021-12-07 00:57:20,143 INFO L226 Difference]: Without dead ends: 782 [2021-12-07 00:57:20,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:57:20,144 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 64 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:20,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 881 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-12-07 00:57:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 779. [2021-12-07 00:57:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 498 states have (on average 1.0963855421686748) internal successors, (546), 506 states have internal predecessors, (546), 192 states have call successors, (192), 79 states have call predecessors, (192), 88 states have return successors, (246), 193 states have call predecessors, (246), 189 states have call successors, (246) [2021-12-07 00:57:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 984 transitions. [2021-12-07 00:57:20,198 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 984 transitions. Word has length 155 [2021-12-07 00:57:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 984 transitions. [2021-12-07 00:57:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-07 00:57:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 984 transitions. [2021-12-07 00:57:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-07 00:57:20,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:20,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:20,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-07 00:57:20,201 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1605444523, now seen corresponding path program 1 times [2021-12-07 00:57:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996061842] [2021-12-07 00:57:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:20,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-07 00:57:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-07 00:57:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-07 00:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-07 00:57:20,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996061842] [2021-12-07 00:57:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996061842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:20,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:57:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683888636] [2021-12-07 00:57:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:57:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:57:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:57:20,530 INFO L87 Difference]: Start difference. First operand 779 states and 984 transitions. Second operand has 12 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 6 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-07 00:57:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:21,059 INFO L93 Difference]: Finished difference Result 1027 states and 1305 transitions. [2021-12-07 00:57:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:57:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 6 states have call predecessors, (24), 8 states have call successors, (24) Word has length 157 [2021-12-07 00:57:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:21,063 INFO L225 Difference]: With dead ends: 1027 [2021-12-07 00:57:21,063 INFO L226 Difference]: Without dead ends: 829 [2021-12-07 00:57:21,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:57:21,064 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 151 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:21,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 678 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:57:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-07 00:57:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 788. [2021-12-07 00:57:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 504 states have (on average 1.0952380952380953) internal successors, (552), 512 states have internal predecessors, (552), 195 states have call successors, (195), 79 states have call predecessors, (195), 88 states have return successors, (249), 196 states have call predecessors, (249), 192 states have call successors, (249) [2021-12-07 00:57:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 996 transitions. [2021-12-07 00:57:21,120 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 996 transitions. Word has length 157 [2021-12-07 00:57:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:21,120 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 996 transitions. [2021-12-07 00:57:21,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 6 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-07 00:57:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 996 transitions. [2021-12-07 00:57:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-07 00:57:21,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:21,123 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 00:57:21,123 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 881675252, now seen corresponding path program 1 times [2021-12-07 00:57:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485281643] [2021-12-07 00:57:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:21,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:57:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:57:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:57:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-07 00:57:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-07 00:57:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-07 00:57:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-07 00:57:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:57:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:57:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:57:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:57:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-07 00:57:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 00:57:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-07 00:57:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-07 00:57:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-07 00:57:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-07 00:57:21,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485281643] [2021-12-07 00:57:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485281643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109371197] [2021-12-07 00:57:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:21,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:21,429 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:21,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:57:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 2813 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 00:57:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:21,979 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-07 00:57:21,980 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 1 case distinctions, treesize of input 40 treesize of output 35 [2021-12-07 00:57:22,409 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 27 treesize of output 15 [2021-12-07 00:57:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 00:57:22,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109371197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:23,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:23,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 23 [2021-12-07 00:57:23,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504168890] [2021-12-07 00:57:23,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:23,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:57:23,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:57:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:57:23,127 INFO L87 Difference]: Start difference. First operand 788 states and 996 transitions. Second operand has 23 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 12 states have call successors, (48), 6 states have call predecessors, (48), 7 states have return successors, (47), 9 states have call predecessors, (47), 12 states have call successors, (47) [2021-12-07 00:57:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:25,870 INFO L93 Difference]: Finished difference Result 1227 states and 1600 transitions. [2021-12-07 00:57:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:57:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 12 states have call successors, (48), 6 states have call predecessors, (48), 7 states have return successors, (47), 9 states have call predecessors, (47), 12 states have call successors, (47) Word has length 157 [2021-12-07 00:57:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:25,875 INFO L225 Difference]: With dead ends: 1227 [2021-12-07 00:57:25,876 INFO L226 Difference]: Without dead ends: 938 [2021-12-07 00:57:25,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 292 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=323, Invalid=2433, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 00:57:25,877 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 275 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:25,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1585 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2648 Invalid, 0 Unknown, 364 Unchecked, 1.8s Time] [2021-12-07 00:57:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-07 00:57:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 758. [2021-12-07 00:57:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 485 states have (on average 1.090721649484536) internal successors, (529), 495 states have internal predecessors, (529), 186 states have call successors, (186), 76 states have call predecessors, (186), 86 states have return successors, (243), 186 states have call predecessors, (243), 183 states have call successors, (243) [2021-12-07 00:57:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 958 transitions. [2021-12-07 00:57:25,934 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 958 transitions. Word has length 157 [2021-12-07 00:57:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:25,934 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 958 transitions. [2021-12-07 00:57:25,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 12 states have call successors, (48), 6 states have call predecessors, (48), 7 states have return successors, (47), 9 states have call predecessors, (47), 12 states have call successors, (47) [2021-12-07 00:57:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 958 transitions. [2021-12-07 00:57:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-07 00:57:25,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:25,937 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:25,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:26,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:26,137 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1047518457, now seen corresponding path program 1 times [2021-12-07 00:57:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:26,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416250967] [2021-12-07 00:57:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:26,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:57:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:57:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 00:57:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 00:57:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 00:57:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 00:57:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:57:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 00:57:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:57:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-07 00:57:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-07 00:57:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:57:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-07 00:57:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-07 00:57:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:57:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:57:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-07 00:57:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-07 00:57:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-07 00:57:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-07 00:57:26,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416250967] [2021-12-07 00:57:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416250967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11145566] [2021-12-07 00:57:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:26,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:26,920 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:26,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:57:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2897 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 00:57:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:59,865 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44|) 8) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44|) 8) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44| Int)) (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_44|) 0) 18446744073709551616) 0))) is different from true [2021-12-07 00:58:02,055 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45|) 8) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45| Int)) (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45|) 0) 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_eq_~b#1.base_BEFORE_CALL_45|) 8) 0)))) is different from true [2021-12-07 00:58:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 1 not checked. [2021-12-07 00:58:12,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:27,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11145566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:27,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:27,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2021-12-07 00:58:27,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079156321] [2021-12-07 00:58:27,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:27,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 00:58:27,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 00:58:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2949, Unknown=24, NotChecked=222, Total=3422 [2021-12-07 00:58:27,353 INFO L87 Difference]: Start difference. First operand 758 states and 958 transitions. Second operand has 44 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 38 states have internal predecessors, (121), 15 states have call successors, (45), 8 states have call predecessors, (45), 11 states have return successors, (44), 14 states have call predecessors, (44), 15 states have call successors, (44) [2021-12-07 00:59:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:18,316 INFO L93 Difference]: Finished difference Result 1376 states and 1865 transitions. [2021-12-07 00:59:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 00:59:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 38 states have internal predecessors, (121), 15 states have call successors, (45), 8 states have call predecessors, (45), 11 states have return successors, (44), 14 states have call predecessors, (44), 15 states have call successors, (44) Word has length 165 [2021-12-07 00:59:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:18,322 INFO L225 Difference]: With dead ends: 1376 [2021-12-07 00:59:18,322 INFO L226 Difference]: Without dead ends: 1098 [2021-12-07 00:59:18,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 216 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 108.0s TimeCoverageRelationStatistics Valid=908, Invalid=8760, Unknown=42, NotChecked=390, Total=10100 [2021-12-07 00:59:18,324 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 607 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 5455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1421 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:18,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 1892 Invalid, 5455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 3385 Invalid, 0 Unknown, 1421 Unchecked, 2.2s Time] [2021-12-07 00:59:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-12-07 00:59:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 888. [2021-12-07 00:59:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 551 states have (on average 1.0889292196007259) internal successors, (600), 559 states have internal predecessors, (600), 247 states have call successors, (247), 79 states have call predecessors, (247), 89 states have return successors, (320), 249 states have call predecessors, (320), 244 states have call successors, (320) [2021-12-07 00:59:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1167 transitions. [2021-12-07 00:59:18,405 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1167 transitions. Word has length 165 [2021-12-07 00:59:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:18,405 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1167 transitions. [2021-12-07 00:59:18,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 38 states have internal predecessors, (121), 15 states have call successors, (45), 8 states have call predecessors, (45), 11 states have return successors, (44), 14 states have call predecessors, (44), 15 states have call successors, (44) [2021-12-07 00:59:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1167 transitions. [2021-12-07 00:59:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-07 00:59:18,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:18,408 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:18,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:59:18,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:18,610 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1399903124, now seen corresponding path program 1 times [2021-12-07 00:59:18,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668446464] [2021-12-07 00:59:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:18,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:59:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:59:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:59:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:59:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:59:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 00:59:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 00:59:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 00:59:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:59:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:59:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:59:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:59:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:59:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 00:59:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 00:59:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:59:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 00:59:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-07 00:59:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-07 00:59:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-07 00:59:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-07 00:59:18,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668446464] [2021-12-07 00:59:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668446464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:18,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:18,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-07 00:59:18,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811519128] [2021-12-07 00:59:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:59:18,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:59:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:59:18,974 INFO L87 Difference]: Start difference. First operand 888 states and 1167 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-07 00:59:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:19,767 INFO L93 Difference]: Finished difference Result 915 states and 1199 transitions. [2021-12-07 00:59:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:59:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 170 [2021-12-07 00:59:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:19,772 INFO L225 Difference]: With dead ends: 915 [2021-12-07 00:59:19,772 INFO L226 Difference]: Without dead ends: 913 [2021-12-07 00:59:19,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:59:19,773 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 79 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1299 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:59:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-12-07 00:59:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 894. [2021-12-07 00:59:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 554 states have (on average 1.0884476534296028) internal successors, (603), 562 states have internal predecessors, (603), 249 states have call successors, (249), 80 states have call predecessors, (249), 90 states have return successors, (322), 251 states have call predecessors, (322), 246 states have call successors, (322) [2021-12-07 00:59:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1174 transitions. [2021-12-07 00:59:19,850 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1174 transitions. Word has length 170 [2021-12-07 00:59:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:19,850 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1174 transitions. [2021-12-07 00:59:19,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-12-07 00:59:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1174 transitions. [2021-12-07 00:59:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-07 00:59:19,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:19,853 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:19,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-07 00:59:19,853 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1886121616, now seen corresponding path program 1 times [2021-12-07 00:59:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:19,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636980254] [2021-12-07 00:59:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:19,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:59:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:59:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:59:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:59:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:59:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 00:59:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 00:59:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 00:59:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:59:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:59:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:59:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:59:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:59:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 00:59:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 00:59:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-07 00:59:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:59:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-07 00:59:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-07 00:59:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-07 00:59:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-07 00:59:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-07 00:59:20,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:20,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636980254] [2021-12-07 00:59:20,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636980254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:59:20,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:59:20,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 00:59:20,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281531785] [2021-12-07 00:59:20,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:59:20,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:59:20,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:59:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:59:20,066 INFO L87 Difference]: Start difference. First operand 894 states and 1174 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-07 00:59:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:20,464 INFO L93 Difference]: Finished difference Result 1153 states and 1560 transitions. [2021-12-07 00:59:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:59:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 166 [2021-12-07 00:59:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:20,470 INFO L225 Difference]: With dead ends: 1153 [2021-12-07 00:59:20,470 INFO L226 Difference]: Without dead ends: 991 [2021-12-07 00:59:20,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:59:20,471 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 66 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:20,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 897 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:59:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-07 00:59:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 961. [2021-12-07 00:59:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 584 states have (on average 1.0839041095890412) internal successors, (633), 588 states have internal predecessors, (633), 286 states have call successors, (286), 80 states have call predecessors, (286), 90 states have return successors, (369), 292 states have call predecessors, (369), 283 states have call successors, (369) [2021-12-07 00:59:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1288 transitions. [2021-12-07 00:59:20,565 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1288 transitions. Word has length 166 [2021-12-07 00:59:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:20,566 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1288 transitions. [2021-12-07 00:59:20,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-07 00:59:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1288 transitions. [2021-12-07 00:59:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-07 00:59:20,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:20,569 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:20,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-07 00:59:20,569 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:20,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1861754755, now seen corresponding path program 1 times [2021-12-07 00:59:20,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:20,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883588642] [2021-12-07 00:59:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:20,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:59:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 00:59:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 00:59:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:59:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:59:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 00:59:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 00:59:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-07 00:59:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-07 00:59:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:59:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-07 00:59:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-07 00:59:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-07 00:59:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-07 00:59:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-07 00:59:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:59:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-07 00:59:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:59:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 00:59:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-07 00:59:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-07 00:59:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-07 00:59:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-07 00:59:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 17 proven. 48 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-07 00:59:21,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883588642] [2021-12-07 00:59:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883588642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189322341] [2021-12-07 00:59:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:21,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:21,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:21,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:59:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2840 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 00:59:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:21,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:59:21,910 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2731 (Array Int Int))) (= (store |c_old(#memory_int)| |c_ensure_byte_cursor_has_allocated_buffer_member_#in~cursor.base| v_ArrVal_2731) |c_#memory_int|)) is different from true [2021-12-07 00:59:21,919 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 26 treesize of output 26 [2021-12-07 01:00:58,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-12-07 01:00:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 95 proven. 55 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-07 01:00:58,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189322341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:05,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:01:05,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 40 [2021-12-07 01:01:05,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472418095] [2021-12-07 01:01:05,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:05,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:01:05,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:01:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2466, Unknown=9, NotChecked=102, Total=2862 [2021-12-07 01:01:05,589 INFO L87 Difference]: Start difference. First operand 961 states and 1288 transitions. Second operand has 40 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 16 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (50), 12 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-07 01:01:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:57,129 INFO L93 Difference]: Finished difference Result 1694 states and 2318 transitions. [2021-12-07 01:01:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 01:01:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 16 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (50), 12 states have call predecessors, (50), 15 states have call successors, (50) Word has length 173 [2021-12-07 01:01:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:57,136 INFO L225 Difference]: With dead ends: 1694 [2021-12-07 01:01:57,136 INFO L226 Difference]: Without dead ends: 1326 [2021-12-07 01:01:57,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 282 SyntacticMatches, 29 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 152.0s TimeCoverageRelationStatistics Valid=786, Invalid=5799, Unknown=61, NotChecked=160, Total=6806 [2021-12-07 01:01:57,138 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 197 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 883 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:57,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1632 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2349 Invalid, 0 Unknown, 883 Unchecked, 1.4s Time] [2021-12-07 01:01:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-12-07 01:01:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1284. [2021-12-07 01:01:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 771 states have (on average 1.0739299610894941) internal successors, (828), 775 states have internal predecessors, (828), 397 states have call successors, (397), 104 states have call predecessors, (397), 115 states have return successors, (507), 404 states have call predecessors, (507), 394 states have call successors, (507) [2021-12-07 01:01:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1732 transitions. [2021-12-07 01:01:57,266 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1732 transitions. Word has length 173 [2021-12-07 01:01:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:57,267 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1732 transitions. [2021-12-07 01:01:57,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 16 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (50), 12 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-07 01:01:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1732 transitions. [2021-12-07 01:01:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 01:01:57,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:57,271 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:57,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-07 01:01:57,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:57,473 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1482574204, now seen corresponding path program 1 times [2021-12-07 01:01:57,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687352917] [2021-12-07 01:01:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:57,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:01:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:01:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 01:01:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:01:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:01:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:01:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:01:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:01:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:01:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 01:01:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:01:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 01:01:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-07 01:01:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:01:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 01:01:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:01:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:01:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 01:01:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-07 01:01:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-07 01:01:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-07 01:01:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-07 01:01:57,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687352917] [2021-12-07 01:01:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687352917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452787530] [2021-12-07 01:01:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:57,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:57,907 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:57,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:01:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-07 01:01:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:01:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:01:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-07 01:01:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:01:59,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:01:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-12-07 01:01:59,155 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2872 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_2872))) (exists ((v_ArrVal_2871 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_2871) |c_#memory_$Pointer$.base|)) (< 0 |c_#StackHeapBarrier|)) is different from true [2021-12-07 01:01:59,158 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 6 treesize of output 5 [2021-12-07 01:01:59,159 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 6 treesize of output 5 [2021-12-07 01:01:59,178 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_2874 (Array Int Int)) (v_ArrVal_2873 (Array Int Int))) (and (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_2874)) (= (store |c_old(#memory_$Pointer$.base)| |save_byte_from_array_~storage#1.base| v_ArrVal_2873) |c_#memory_$Pointer$.base|))) (< 0 |c_#StackHeapBarrier|)) is different from true [2021-12-07 01:01:59,212 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:01:59,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2021-12-07 01:01:59,225 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:01:59,226 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 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-07 01:01:59,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-07 01:01:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:01:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 14 [2021-12-07 01:01:59,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-12-07 01:02:00,177 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 [2021-12-07 01:02:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 53 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 2 not checked. [2021-12-07 01:02:00,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:02:03,158 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_save_byte_from_array_~storage#1.base_82| Int) (v_ArrVal_2882 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_82| v_ArrVal_2882))) (or (and (< 0 (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset|) 18446744073709551616)) (forall ((v_ArrVal_2881 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_save_byte_from_array_~storage#1.base_82| v_ArrVal_2881) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#rhs~0#1.offset| 8)) 0))) (<= 0 |c_#StackHeapBarrier|)) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_eq_harness_~#lhs~0#1.offset|))) (<= .cse1 (+ 18446744073709551615 (* 18446744073709551616 (div (+ (- 1) .cse1) 18446744073709551616)))))))) is different from false [2021-12-07 01:02:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452787530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:02:03,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:02:03,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 31] total 39 [2021-12-07 01:02:03,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592188824] [2021-12-07 01:02:03,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:02:03,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 01:02:03,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:02:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 01:02:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1730, Unknown=4, NotChecked=258, Total=2162 [2021-12-07 01:02:03,161 INFO L87 Difference]: Start difference. First operand 1284 states and 1732 transitions. Second operand has 39 states, 36 states have (on average 4.027777777777778) internal successors, (145), 30 states have internal predecessors, (145), 14 states have call successors, (44), 11 states have call predecessors, (44), 12 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2021-12-07 01:02:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:13,402 INFO L93 Difference]: Finished difference Result 2450 states and 3317 transitions. [2021-12-07 01:02:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-07 01:02:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.027777777777778) internal successors, (145), 30 states have internal predecessors, (145), 14 states have call successors, (44), 11 states have call predecessors, (44), 12 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) Word has length 163 [2021-12-07 01:02:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:13,413 INFO L225 Difference]: With dead ends: 2450 [2021-12-07 01:02:13,414 INFO L226 Difference]: Without dead ends: 2221 [2021-12-07 01:02:13,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 259 SyntacticMatches, 17 SemanticMatches, 86 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=608, Invalid=6524, Unknown=20, NotChecked=504, Total=7656 [2021-12-07 01:02:13,416 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 357 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 4157 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 7230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 4157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2811 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:13,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 2729 Invalid, 7230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 4157 Invalid, 0 Unknown, 2811 Unchecked, 2.4s Time] [2021-12-07 01:02:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-12-07 01:02:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1970. [2021-12-07 01:02:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1172 states have (on average 1.0776450511945392) internal successors, (1263), 1180 states have internal predecessors, (1263), 613 states have call successors, (613), 166 states have call predecessors, (613), 184 states have return successors, (767), 623 states have call predecessors, (767), 608 states have call successors, (767) [2021-12-07 01:02:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 2643 transitions. [2021-12-07 01:02:13,608 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 2643 transitions. Word has length 163 [2021-12-07 01:02:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:13,609 INFO L470 AbstractCegarLoop]: Abstraction has 1970 states and 2643 transitions. [2021-12-07 01:02:13,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.027777777777778) internal successors, (145), 30 states have internal predecessors, (145), 14 states have call successors, (44), 11 states have call predecessors, (44), 12 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2021-12-07 01:02:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 2643 transitions. [2021-12-07 01:02:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 01:02:13,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:13,615 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:13,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:02:13,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:02:13,816 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1179589093, now seen corresponding path program 1 times [2021-12-07 01:02:13,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:02:13,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506176178] [2021-12-07 01:02:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:13,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:02:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:02:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:02:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 01:02:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:02:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:02:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:02:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-07 01:02:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-07 01:02:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:02:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-07 01:02:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:02:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-07 01:02:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-07 01:02:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-07 01:02:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-07 01:02:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 01:02:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 01:02:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 01:02:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-07 01:02:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-07 01:02:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-07 01:02:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-07 01:02:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-07 01:02:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-07 01:02:14,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:02:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506176178] [2021-12-07 01:02:14,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506176178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:02:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389925518] [2021-12-07 01:02:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:14,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:02:14,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:02:14,573 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:02:14,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:02:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 01:02:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:14,934 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:02:14,935 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:02:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:02:15,470 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-12-07 01:02:15,470 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 29 treesize of output 33 [2021-12-07 01:02:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-07 01:02:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:02:16,652 INFO L354 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2021-12-07 01:02:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 40 [2021-12-07 01:02:16,656 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 30 treesize of output 18 [2021-12-07 01:02:16,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:02:16,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:02:17,230 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 6 treesize of output 5 [2021-12-07 01:02:17,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:02:17,248 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3023 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3023) |c_#memory_$Pointer$.base|)) (< 0 |c_#StackHeapBarrier|) (exists ((v_ArrVal_3024 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_3024)))) is different from true [2021-12-07 01:02:17,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 01:02:17,277 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:02:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-07 01:02:17,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-07 01:02:17,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:02:17,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 01:02:17,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95955878] [2021-12-07 01:02:17,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:02:17,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:02:17,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:02:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:02:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1918, Unknown=2, NotChecked=88, Total=2162 [2021-12-07 01:02:17,282 INFO L87 Difference]: Start difference. First operand 1970 states and 2643 transitions. Second operand has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-07 01:02:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:02:17,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=1918, Unknown=2, NotChecked=88, Total=2162 [2021-12-07 01:02:17,283 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:17,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:02:17,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:02:17,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:02:17,485 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@65e2b62c at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-07 01:02:17,488 INFO L158 Benchmark]: Toolchain (without parser) took 715781.63ms. Allocated memory was 157.3MB in the beginning and 314.6MB in the end (delta: 157.3MB). Free memory was 113.9MB in the beginning and 205.1MB in the end (delta: -91.2MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,488 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 79.7MB. Free memory was 58.5MB in the beginning and 58.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:02:17,489 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1950.78ms. Allocated memory was 157.3MB in the beginning and 218.1MB in the end (delta: 60.8MB). Free memory was 113.6MB in the beginning and 147.6MB in the end (delta: -34.0MB). Peak memory consumption was 88.6MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,489 INFO L158 Benchmark]: Boogie Procedure Inliner took 128.40ms. Allocated memory is still 218.1MB. Free memory was 147.6MB in the beginning and 136.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,489 INFO L158 Benchmark]: Boogie Preprocessor took 61.15ms. Allocated memory is still 218.1MB. Free memory was 136.1MB in the beginning and 129.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,489 INFO L158 Benchmark]: RCFGBuilder took 1074.23ms. Allocated memory is still 218.1MB. Free memory was 129.8MB in the beginning and 122.7MB in the end (delta: 7.1MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,490 INFO L158 Benchmark]: TraceAbstraction took 712561.02ms. Allocated memory was 218.1MB in the beginning and 314.6MB in the end (delta: 96.5MB). Free memory was 122.7MB in the beginning and 205.1MB in the end (delta: -82.4MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2021-12-07 01:02:17,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 79.7MB. Free memory was 58.5MB in the beginning and 58.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1950.78ms. Allocated memory was 157.3MB in the beginning and 218.1MB in the end (delta: 60.8MB). Free memory was 113.6MB in the beginning and 147.6MB in the end (delta: -34.0MB). Peak memory consumption was 88.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 128.40ms. Allocated memory is still 218.1MB. Free memory was 147.6MB in the beginning and 136.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.15ms. Allocated memory is still 218.1MB. Free memory was 136.1MB in the beginning and 129.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1074.23ms. Allocated memory is still 218.1MB. Free memory was 129.8MB in the beginning and 122.7MB in the end (delta: 7.1MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. * TraceAbstraction took 712561.02ms. Allocated memory was 218.1MB in the beginning and 314.6MB in the end (delta: 96.5MB). Free memory was 122.7MB in the beginning and 205.1MB in the end (delta: -82.4MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@65e2b62c de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@65e2b62c: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-07 01:02:17,698 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-07 01:02:17,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:02:19,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:02:19,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:02:19,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:02:19,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:02:19,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:02:19,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:02:19,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:02:19,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:02:19,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:02:19,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:02:19,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:02:19,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:02:19,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:02:19,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:02:19,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:02:19,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:02:19,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:02:19,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:02:19,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:02:19,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:02:19,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:02:19,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:02:19,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:02:19,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:02:19,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:02:19,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:02:19,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:02:19,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:02:19,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:02:19,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:02:19,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:02:19,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:02:19,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:02:19,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:02:19,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:02:19,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:02:19,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:02:19,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:02:19,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:02:19,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:02:19,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-07 01:02:19,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:02:19,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:02:19,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:02:19,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:02:19,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:02:19,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:02:19,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:02:19,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:02:19,188 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:02:19,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:02:19,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:02:19,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:02:19,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:02:19,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:02:19,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:02:19,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:02:19,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:02:19,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:02:19,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:02:19,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:02:19,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:02:19,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:02:19,192 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376fa3967c5a16dbeae94f1517cf176a2f53d2660c6b5c3d2eeb4fd9f827337c [2021-12-07 01:02:19,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:02:19,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:02:19,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:02:19,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:02:19,427 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:02:19,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-07 01:02:19,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/7a42fcd48/fd0c4eb43add4f2893775aa361c0e389/FLAGe2aff45a2 [2021-12-07 01:02:20,076 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:02:20,076 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i [2021-12-07 01:02:20,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/7a42fcd48/fd0c4eb43add4f2893775aa361c0e389/FLAGe2aff45a2 [2021-12-07 01:02:20,521 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/data/7a42fcd48/fd0c4eb43add4f2893775aa361c0e389 [2021-12-07 01:02:20,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:02:20,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:02:20,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:02:20,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:02:20,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:02:20,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:02:20" (1/1) ... [2021-12-07 01:02:20,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268821f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:20, skipping insertion in model container [2021-12-07 01:02:20,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:02:20" (1/1) ... [2021-12-07 01:02:20,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:02:20,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:02:20,798 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-07 01:02:20,803 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-07 01:02:21,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,451 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,462 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,462 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,463 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,464 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:02:21,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:02:21,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:02:21,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:02:21,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:02:21,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:02:21,779 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:02:21,779 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:02:21,780 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:02:21,780 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:02:21,920 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:02:21,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:21,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:02:22,082 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-07 01:02:22,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:02:22,121 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-07 01:02:22,122 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-07 01:02:22,144 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,144 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,145 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,145 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,145 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,151 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,151 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,174 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:02:22,175 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:02:22,175 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:02:22,176 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:02:22,176 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:02:22,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:02:22,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:02:22,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:02:22,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:02:22,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:02:22,192 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:02:22,238 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,238 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:02:22,277 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:02:22,286 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4492,4505] [2021-12-07 01:02:22,287 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_89601f84-88ef-4d83-8e58-60b041ba0c54/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_harness.i[4552,4565] [2021-12-07 01:02:22,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 01:02:22,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 01:02:22,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 01:02:22,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 01:02:22,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 01:02:22,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 01:02:22,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 01:02:22,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 01:02:22,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 01:02:22,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 01:02:22,355 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 01:02:22,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 01:02:22,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:02:22,599 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:02:22,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22 WrapperNode [2021-12-07 01:02:22,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:02:22,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:02:22,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:02:22,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:02:22,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,748 INFO L137 Inliner]: procedures = 711, calls = 2650, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 874 [2021-12-07 01:02:22,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:02:22,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:02:22,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:02:22,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:02:22,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:02:22,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:02:22,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:02:22,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:02:22,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2021-12-07 01:02:22,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:02:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:02:22,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:02:22,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:02:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-07 01:02:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-07 01:02:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-07 01:02:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 01:02:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-12-07 01:02:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:02:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:02:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-07 01:02:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-07 01:02:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:02:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:02:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:02:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 01:02:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 01:02:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-07 01:02:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-07 01:02:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 01:02:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-07 01:02:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:02:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-07 01:02:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-07 01:02:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-07 01:02:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-12-07 01:02:23,105 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:02:23,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:02:24,424 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:02:24,430 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:02:24,430 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 01:02:24,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:02:24 BoogieIcfgContainer [2021-12-07 01:02:24,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:02:24,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:02:24,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:02:24,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:02:24,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:02:20" (1/3) ... [2021-12-07 01:02:24,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753a8408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:02:24, skipping insertion in model container [2021-12-07 01:02:24,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (2/3) ... [2021-12-07 01:02:24,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753a8408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:02:24, skipping insertion in model container [2021-12-07 01:02:24,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:02:24" (3/3) ... [2021-12-07 01:02:24,437 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_harness.i [2021-12-07 01:02:24,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:02:24,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:02:24,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:02:24,478 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:02:24,478 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:02:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-07 01:02:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-07 01:02:24,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:24,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-07 01:02:24,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1889081573, now seen corresponding path program 1 times [2021-12-07 01:02:24,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:24,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715005940] [2021-12-07 01:02:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:24,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:24,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:24,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:24,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:02:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:02:25,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:02:25,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:02:25,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:25,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715005940] [2021-12-07 01:02:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715005940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:02:25,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:02:25,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:02:25,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685481656] [2021-12-07 01:02:25,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:02:25,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:02:25,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:02:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:02:25,670 INFO L87 Difference]: Start difference. First operand has 134 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 82 states have internal predecessors, (100), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 01:02:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:26,100 INFO L93 Difference]: Finished difference Result 267 states and 391 transitions. [2021-12-07 01:02:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:02:26,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 102 [2021-12-07 01:02:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:26,110 INFO L225 Difference]: With dead ends: 267 [2021-12-07 01:02:26,110 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 01:02:26,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:02:26,116 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 49 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:26,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 558 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:02:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 01:02:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-07 01:02:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (45), 39 states have call predecessors, (45), 39 states have call successors, (45) [2021-12-07 01:02:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2021-12-07 01:02:26,155 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 102 [2021-12-07 01:02:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2021-12-07 01:02:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 01:02:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2021-12-07 01:02:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-07 01:02:26,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:26,160 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:26,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:02:26,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:02:26,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 892843210, now seen corresponding path program 1 times [2021-12-07 01:02:26,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:26,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699913748] [2021-12-07 01:02:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:26,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:26,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:26,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:02:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:02:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:02:27,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:02:27,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699913748] [2021-12-07 01:02:27,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699913748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:02:27,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:02:27,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:02:27,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798825336] [2021-12-07 01:02:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:02:27,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:02:27,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:02:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:02:27,442 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 01:02:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:28,002 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2021-12-07 01:02:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:02:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 104 [2021-12-07 01:02:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:28,005 INFO L225 Difference]: With dead ends: 212 [2021-12-07 01:02:28,005 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 01:02:28,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:02:28,006 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 67 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:28,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 526 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:02:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 01:02:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-07 01:02:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 40 states have call successors, (40), 11 states have call predecessors, (40), 12 states have return successors, (43), 39 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-07 01:02:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2021-12-07 01:02:28,020 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 104 [2021-12-07 01:02:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:28,021 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2021-12-07 01:02:28,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 01:02:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2021-12-07 01:02:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 01:02:28,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:28,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:28,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:02:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:02:28,225 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 571694548, now seen corresponding path program 2 times [2021-12-07 01:02:28,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301809333] [2021-12-07 01:02:28,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:02:28,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:28,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:28,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:02:28,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:02:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:02:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:02:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 01:02:28,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:02:28,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301809333] [2021-12-07 01:02:28,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301809333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:02:28,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:02:28,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:02:28,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339983579] [2021-12-07 01:02:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:02:28,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:02:28,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:02:28,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:02:28,867 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 01:02:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:28,947 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2021-12-07 01:02:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:02:28,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2021-12-07 01:02:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:28,949 INFO L225 Difference]: With dead ends: 143 [2021-12-07 01:02:28,950 INFO L226 Difference]: Without dead ends: 141 [2021-12-07 01:02:28,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:02:28,950 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 16 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:28,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1179 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:02:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-07 01:02:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-12-07 01:02:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 41 states have call successors, (41), 12 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-07 01:02:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-12-07 01:02:28,964 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 108 [2021-12-07 01:02:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:28,964 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-12-07 01:02:28,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-12-07 01:02:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-12-07 01:02:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 01:02:28,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:28,966 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:28,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:02:29,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:02:29,168 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1101472484, now seen corresponding path program 1 times [2021-12-07 01:02:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068048156] [2021-12-07 01:02:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:29,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:29,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:29,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:02:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:30,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:02:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 01:02:30,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:02:30,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068048156] [2021-12-07 01:02:30,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068048156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:02:30,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:02:30,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:02:30,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786302583] [2021-12-07 01:02:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:02:30,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:02:30,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:02:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:02:30,288 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 01:02:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:30,668 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2021-12-07 01:02:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:02:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2021-12-07 01:02:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:30,671 INFO L225 Difference]: With dead ends: 245 [2021-12-07 01:02:30,671 INFO L226 Difference]: Without dead ends: 137 [2021-12-07 01:02:30,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:02:30,673 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 66 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:30,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 537 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:02:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-07 01:02:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-07 01:02:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2021-12-07 01:02:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2021-12-07 01:02:30,691 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 112 [2021-12-07 01:02:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:30,691 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2021-12-07 01:02:30,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-07 01:02:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2021-12-07 01:02:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 01:02:30,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:30,694 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:30,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:02:30,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:02:30,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash 952153793, now seen corresponding path program 1 times [2021-12-07 01:02:30,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:30,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830372416] [2021-12-07 01:02:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:30,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:30,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:30,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:30,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:02:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:31,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 01:02:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:34,176 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-12-07 01:02:34,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-12-07 01:02:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:02:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:02:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 01:02:46,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830372416] [2021-12-07 01:02:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830372416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:02:46,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:02:46,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2021-12-07 01:02:46,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718722300] [2021-12-07 01:02:46,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:02:46,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:02:46,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:02:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=558, Unknown=2, NotChecked=0, Total=650 [2021-12-07 01:02:46,632 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 26 states, 23 states have (on average 4.0) internal successors, (92), 24 states have internal predecessors, (92), 12 states have call successors, (34), 4 states have call predecessors, (34), 9 states have return successors, (33), 9 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-07 01:03:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:08,528 INFO L93 Difference]: Finished difference Result 385 states and 560 transitions. [2021-12-07 01:03:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:03:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.0) internal successors, (92), 24 states have internal predecessors, (92), 12 states have call successors, (34), 4 states have call predecessors, (34), 9 states have return successors, (33), 9 states have call predecessors, (33), 12 states have call successors, (33) Word has length 114 [2021-12-07 01:03:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:08,541 INFO L225 Difference]: With dead ends: 385 [2021-12-07 01:03:08,541 INFO L226 Difference]: Without dead ends: 311 [2021-12-07 01:03:08,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=242, Invalid=1478, Unknown=2, NotChecked=0, Total=1722 [2021-12-07 01:03:08,543 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 196 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 818 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:08,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1922 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2117 Invalid, 0 Unknown, 818 Unchecked, 18.6s Time] [2021-12-07 01:03:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-07 01:03:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 156. [2021-12-07 01:03:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 97 states have internal predecessors, (110), 45 states have call successors, (45), 14 states have call predecessors, (45), 16 states have return successors, (54), 44 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-07 01:03:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 209 transitions. [2021-12-07 01:03:08,577 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 209 transitions. Word has length 114 [2021-12-07 01:03:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:08,577 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 209 transitions. [2021-12-07 01:03:08,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.0) internal successors, (92), 24 states have internal predecessors, (92), 12 states have call successors, (34), 4 states have call predecessors, (34), 9 states have return successors, (33), 9 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-07 01:03:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 209 transitions. [2021-12-07 01:03:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:03:08,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:08,580 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:08,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:03:08,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:03:08,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1599370103, now seen corresponding path program 2 times [2021-12-07 01:03:08,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:03:08,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292240599] [2021-12-07 01:03:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:03:08,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:03:08,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:03:08,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:03:08,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89601f84-88ef-4d83-8e58-60b041ba0c54/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:03:20,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:03:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:20,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:03:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:03:23,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:33,476 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-07 01:03:33,480 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-12-07 01:03:33,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 128 treesize of output 771