./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:36:38,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:36:38,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:36:38,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:36:38,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:36:38,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:36:38,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:36:38,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:36:38,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:36:38,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:36:38,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:36:38,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:36:38,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:36:38,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:36:38,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:36:38,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:36:38,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:36:38,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:36:38,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:36:38,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:36:38,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:36:38,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:36:38,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:36:38,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:36:38,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:36:38,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:36:38,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:36:38,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:36:38,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:36:38,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:36:38,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:36:38,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:36:38,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:36:38,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:36:38,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:36:38,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:36:38,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:36:38,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:36:38,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:36:38,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:36:38,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:36:38,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:36:38,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:36:38,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:36:38,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:36:38,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:36:38,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:36:38,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:36:38,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:36:38,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:36:38,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:36:38,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:36:38,415 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:36:38,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:36:38,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:36:38,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:36:38,416 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:36:38,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:36:38,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:36:38,417 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:36:38,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:36:38,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:36:38,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:36:38,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:36:38,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:36:38,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:36:38,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:36:38,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:36:38,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:36:38,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:36:38,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:36:38,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:38,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:36:38,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:36:38,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:36:38,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:36:38,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:36:38,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:36:38,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:36:38,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:36:38,422 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-23 03:36:38,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:36:38,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:36:38,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:36:38,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:36:38,688 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:36:38,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-23 03:36:38,748 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/265ddebd6/73b4229294c849cc891cfd6b7349b13c/FLAG72bcd0506 [2021-11-23 03:36:39,471 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:39,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-23 03:36:39,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/265ddebd6/73b4229294c849cc891cfd6b7349b13c/FLAG72bcd0506 [2021-11-23 03:36:39,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/265ddebd6/73b4229294c849cc891cfd6b7349b13c [2021-11-23 03:36:39,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:36:39,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:36:39,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:39,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:36:39,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:36:39,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:39" (1/1) ... [2021-11-23 03:36:39,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5342c511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:39, skipping insertion in model container [2021-11-23 03:36:39,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:39" (1/1) ... [2021-11-23 03:36:39,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:36:39,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:36:39,952 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-23 03:36:39,958 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-23 03:36:40,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,887 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,888 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,891 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,930 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,932 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,933 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,936 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,936 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:40,937 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,277 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:36:41,278 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:36:41,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:36:41,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:36:41,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:36:41,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:36:41,284 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:36:41,284 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:36:41,285 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:36:41,286 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:36:41,456 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:36:41,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:41,518 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:36:41,548 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-23 03:36:41,549 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-23 03:36:41,616 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,616 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,617 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,618 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,618 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,629 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,629 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,630 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,631 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:36:41,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:36:41,671 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:36:41,672 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:36:41,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:36:41,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:36:41,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:36:41,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:36:41,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:36:41,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:36:41,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:36:41,701 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:36:41,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:41,899 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:36:41,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41 WrapperNode [2021-11-23 03:36:41,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:41,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:41,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:36:41,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:36:41,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:41,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,039 INFO L137 Inliner]: procedures = 679, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 214 [2021-11-23 03:36:42,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:42,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:36:42,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:36:42,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:36:42,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:36:42,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:36:42,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:36:42,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:36:42,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (1/1) ... [2021-11-23 03:36:42,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:42,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:36:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:36:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-23 03:36:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-23 03:36:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:36:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:36:42,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:36:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-23 03:36:42,224 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-23 03:36:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-11-23 03:36:42,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-11-23 03:36:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:36:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-23 03:36:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-23 03:36:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:36:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:36:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:36:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:36:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-23 03:36:42,227 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-23 03:36:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:36:42,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:36:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:36:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:36:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:36:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 03:36:42,229 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 03:36:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:36:42,501 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:36:42,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:36:43,044 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:36:43,151 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:36:43,151 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:36:43,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:43 BoogieIcfgContainer [2021-11-23 03:36:43,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:36:43,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:36:43,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:36:43,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:36:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:39" (1/3) ... [2021-11-23 03:36:43,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4059bbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:43, skipping insertion in model container [2021-11-23 03:36:43,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:41" (2/3) ... [2021-11-23 03:36:43,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4059bbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:43, skipping insertion in model container [2021-11-23 03:36:43,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:43" (3/3) ... [2021-11-23 03:36:43,163 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-23 03:36:43,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:36:43,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:36:43,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:36:43,256 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:36:43,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:36:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-23 03:36:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 03:36:43,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:43,304 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-23 03:36:43,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1308370605, now seen corresponding path program 1 times [2021-11-23 03:36:43,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662934779] [2021-11-23 03:36:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:43,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:36:43,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662934779] [2021-11-23 03:36:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662934779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218521197] [2021-11-23 03:36:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:43,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:43,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:43,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 03:36:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:36:44,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:44,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218521197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:44,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:44,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2021-11-23 03:36:44,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318401375] [2021-11-23 03:36:44,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:44,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:36:44,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:36:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:36:44,605 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 03:36:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:45,136 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2021-11-23 03:36:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:36:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2021-11-23 03:36:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:45,151 INFO L225 Difference]: With dead ends: 166 [2021-11-23 03:36:45,152 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 03:36:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:36:45,167 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 41 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:45,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 509 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:36:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 03:36:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-23 03:36:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-23 03:36:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2021-11-23 03:36:45,249 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2021-11-23 03:36:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:45,250 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2021-11-23 03:36:45,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 03:36:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2021-11-23 03:36:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:36:45,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:45,254 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:45,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:45,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 03:36:45,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash -825605775, now seen corresponding path program 1 times [2021-11-23 03:36:45,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871560579] [2021-11-23 03:36:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:45,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:45,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871560579] [2021-11-23 03:36:45,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871560579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:45,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344581234] [2021-11-23 03:36:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:45,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:45,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:45,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:36:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:36:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:36:46,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344581234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:46,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:46,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-23 03:36:46,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974877246] [2021-11-23 03:36:46,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:46,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:36:46,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:36:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:36:46,106 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:36:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:46,524 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2021-11-23 03:36:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:36:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2021-11-23 03:36:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:46,530 INFO L225 Difference]: With dead ends: 163 [2021-11-23 03:36:46,531 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 03:36:46,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:36:46,533 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 64 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:46,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:36:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 03:36:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-23 03:36:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 51 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:36:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2021-11-23 03:36:46,569 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2021-11-23 03:36:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:46,570 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2021-11-23 03:36:46,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:36:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2021-11-23 03:36:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:36:46,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:46,572 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-23 03:36:46,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:46,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:46,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2097948773, now seen corresponding path program 1 times [2021-11-23 03:36:46,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:46,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171085212] [2021-11-23 03:36:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:46,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:46,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171085212] [2021-11-23 03:36:46,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171085212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169368281] [2021-11-23 03:36:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:46,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:46,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:46,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:46,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:36:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:47,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:36:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:36:47,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:47,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169368281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:47,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:47,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-23 03:36:47,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567260994] [2021-11-23 03:36:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:47,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:36:47,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:36:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:36:47,362 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:36:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:47,851 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2021-11-23 03:36:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:36:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-11-23 03:36:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:47,859 INFO L225 Difference]: With dead ends: 178 [2021-11-23 03:36:47,860 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 03:36:47,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:36:47,863 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 92 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:47,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 529 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:36:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 03:36:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-11-23 03:36:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 53 states have internal predecessors, (59), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:36:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2021-11-23 03:36:47,885 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2021-11-23 03:36:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:47,886 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2021-11-23 03:36:47,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:36:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2021-11-23 03:36:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:36:47,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:47,889 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-23 03:36:47,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:48,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:48,112 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -921720928, now seen corresponding path program 1 times [2021-11-23 03:36:48,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:48,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80083285] [2021-11-23 03:36:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:48,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:48,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80083285] [2021-11-23 03:36:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80083285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783409883] [2021-11-23 03:36:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:48,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:48,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:48,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:36:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:36:48,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:36:48,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:48,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783409883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:48,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:48,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-23 03:36:48,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803099955] [2021-11-23 03:36:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:48,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:48,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:36:48,615 INFO L87 Difference]: Start difference. First operand 92 states and 135 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 03:36:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:48,665 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2021-11-23 03:36:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-11-23 03:36:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:48,668 INFO L225 Difference]: With dead ends: 179 [2021-11-23 03:36:48,668 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 03:36:48,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:36:48,670 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:48,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 03:36:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2021-11-23 03:36:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:36:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-11-23 03:36:48,687 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2021-11-23 03:36:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-11-23 03:36:48,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 03:36:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-11-23 03:36:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:36:48,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:48,690 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-23 03:36:48,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:48,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:48,891 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1389593974, now seen corresponding path program 1 times [2021-11-23 03:36:48,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:48,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139696149] [2021-11-23 03:36:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:48,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:36:49,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139696149] [2021-11-23 03:36:49,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139696149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628375532] [2021-11-23 03:36:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:49,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:49,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:49,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:49,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:36:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 03:36:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:36:49,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628375532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:49,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:49,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2021-11-23 03:36:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754848830] [2021-11-23 03:36:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:49,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:36:49,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:36:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:36:49,418 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:36:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:49,816 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2021-11-23 03:36:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:36:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2021-11-23 03:36:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:49,819 INFO L225 Difference]: With dead ends: 178 [2021-11-23 03:36:49,819 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 03:36:49,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:36:49,821 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 39 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:49,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 615 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:36:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 03:36:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-11-23 03:36:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:36:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2021-11-23 03:36:49,836 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2021-11-23 03:36:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:49,837 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2021-11-23 03:36:49,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:36:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2021-11-23 03:36:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 03:36:49,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:49,839 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-23 03:36:49,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:50,052 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1370238580, now seen corresponding path program 1 times [2021-11-23 03:36:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110867074] [2021-11-23 03:36:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:50,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:50,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110867074] [2021-11-23 03:36:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110867074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:50,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285565001] [2021-11-23 03:36:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:50,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:50,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:50,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:36:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 03:36:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:36:50,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285565001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:50,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:50,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-23 03:36:50,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382590106] [2021-11-23 03:36:50,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:36:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:36:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:36:50,741 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand has 9 states, 6 states have (on average 5.5) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-23 03:36:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:51,250 INFO L93 Difference]: Finished difference Result 183 states and 279 transitions. [2021-11-23 03:36:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:36:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 5.5) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-11-23 03:36:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:51,253 INFO L225 Difference]: With dead ends: 183 [2021-11-23 03:36:51,253 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 03:36:51,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:36:51,255 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 43 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:51,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 732 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:36:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 03:36:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2021-11-23 03:36:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.24) internal successors, (62), 56 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:36:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 138 transitions. [2021-11-23 03:36:51,271 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 138 transitions. Word has length 72 [2021-11-23 03:36:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:51,272 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 138 transitions. [2021-11-23 03:36:51,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 5.5) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-23 03:36:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 138 transitions. [2021-11-23 03:36:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 03:36:51,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:51,274 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:51,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:36:51,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:51,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -782095385, now seen corresponding path program 1 times [2021-11-23 03:36:51,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963125365] [2021-11-23 03:36:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:51,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:51,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963125365] [2021-11-23 03:36:51,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963125365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90247099] [2021-11-23 03:36:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:51,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:51,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:51,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:36:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:36:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:36:51,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:36:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90247099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082321188] [2021-11-23 03:36:52,273 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-23 03:36:52,273 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:52,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:52,283 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:52,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:52,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,553 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-23 03:36:52,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-23 03:36:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 23 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 03:36:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 03:36:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,772 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 24 treesize of output 9 [2021-11-23 03:36:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-23 03:36:52,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 03:36:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,818 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 35 treesize of output 7 [2021-11-23 03:36:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2021-11-23 03:36:52,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,858 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 35 treesize of output 7 [2021-11-23 03:36:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-23 03:36:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-23 03:36:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 23 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-11-23 03:36:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:52,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-23 03:36:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-23 03:36:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-23 03:36:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 23 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-11-23 03:36:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-23 03:36:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-23 03:36:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:36:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 52 [2021-11-23 03:36:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2021-11-23 03:36:53,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:36:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:36:53,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 52 [2021-11-23 03:36:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2021-11-23 03:36:53,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:36:54,161 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:36:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:36:54,210 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 03:36:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-23 03:37:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:37:16,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:16,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:37:20,009 INFO L354 Elim1Store]: treesize reduction 5668, result has 0.0 percent of original size [2021-11-23 03:37:20,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 22 select indices, 22 select index equivalence classes, 11 disjoint index pairs (out of 231 index pairs), introduced 28 new quantified variables, introduced 255 case distinctions, treesize of input 2982 treesize of output 1 [2021-11-23 03:37:28,530 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 167 for LOIs [2021-11-23 03:37:33,445 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 281 for LOIs [2021-11-23 03:37:36,303 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 210 for LOIs [2021-11-23 03:37:42,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:42,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:42,401 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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) [2021-11-23 03:37:42,405 INFO L158 Benchmark]: Toolchain (without parser) took 62821.40ms. Allocated memory was 92.3MB in the beginning and 415.2MB in the end (delta: 323.0MB). Free memory was 63.8MB in the beginning and 304.0MB in the end (delta: -240.2MB). Peak memory consumption was 81.6MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,405 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:37:42,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2315.19ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 63.8MB in the beginning and 56.7MB in the end (delta: 7.2MB). Peak memory consumption was 52.5MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,405 INFO L158 Benchmark]: Boogie Procedure Inliner took 138.84ms. Allocated memory is still 121.6MB. Free memory was 56.0MB in the beginning and 50.4MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,406 INFO L158 Benchmark]: Boogie Preprocessor took 54.65ms. Allocated memory is still 121.6MB. Free memory was 50.4MB in the beginning and 46.9MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,406 INFO L158 Benchmark]: RCFGBuilder took 1058.14ms. Allocated memory is still 121.6MB. Free memory was 46.9MB in the beginning and 45.5MB in the end (delta: 1.3MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,406 INFO L158 Benchmark]: TraceAbstraction took 59248.30ms. Allocated memory was 121.6MB in the beginning and 415.2MB in the end (delta: 293.6MB). Free memory was 44.8MB in the beginning and 304.0MB in the end (delta: -259.2MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2021-11-23 03:37:42,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2315.19ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 63.8MB in the beginning and 56.7MB in the end (delta: 7.2MB). Peak memory consumption was 52.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 138.84ms. Allocated memory is still 121.6MB. Free memory was 56.0MB in the beginning and 50.4MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.65ms. Allocated memory is still 121.6MB. Free memory was 50.4MB in the beginning and 46.9MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1058.14ms. Allocated memory is still 121.6MB. Free memory was 46.9MB in the beginning and 45.5MB in the end (delta: 1.3MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * TraceAbstraction took 59248.30ms. Allocated memory was 121.6MB in the beginning and 415.2MB in the end (delta: 293.6MB). Free memory was 44.8MB in the beginning and 304.0MB in the end (delta: -259.2MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 03:37:42,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:37:44,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:37:44,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:37:44,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:37:44,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:37:44,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:37:44,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:37:44,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:37:44,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:37:44,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:37:44,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:37:44,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:37:44,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:37:44,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:37:44,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:37:44,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:37:44,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:37:44,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:37:44,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:37:44,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:37:44,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:37:44,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:37:44,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:37:44,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:37:44,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:37:44,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:37:44,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:37:44,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:37:44,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:37:44,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:37:44,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:37:44,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:37:44,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:37:44,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:37:44,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:37:44,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:37:44,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:37:44,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:37:44,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:37:44,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:37:44,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:37:44,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 03:37:44,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:37:44,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:37:44,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:37:44,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:37:44,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:37:44,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:37:44,926 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:37:44,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:37:44,926 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:37:44,927 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:37:44,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:37:44,927 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:37:44,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:37:44,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:37:44,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:37:44,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:37:44,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:37:44,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:37:44,929 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:37:44,930 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:37:44,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:37:44,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:37:44,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:37:44,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:37:44,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:37:44,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:37:44,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:44,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:37:44,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:37:44,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:37:44,932 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:37:44,932 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:37:44,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:37:44,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:37:44,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:37:44,933 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_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-23 03:37:45,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:37:45,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:37:45,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:37:45,371 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:37:45,372 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:37:45,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-23 03:37:45,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/30f0336b4/b2c7e7a5214949a1aa5a8d49f1dfec79/FLAGc3ca2e476 [2021-11-23 03:37:46,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:37:46,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-23 03:37:46,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/30f0336b4/b2c7e7a5214949a1aa5a8d49f1dfec79/FLAGc3ca2e476 [2021-11-23 03:37:46,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/data/30f0336b4/b2c7e7a5214949a1aa5a8d49f1dfec79 [2021-11-23 03:37:46,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:37:46,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:37:46,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:46,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:37:46,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:37:46,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530cd64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46, skipping insertion in model container [2021-11-23 03:37:46,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:37:46,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:37:46,786 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-23 03:37:46,815 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-23 03:37:47,817 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,826 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,840 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,841 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,842 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,843 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,845 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,847 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,848 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:47,848 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,199 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:37:48,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:37:48,202 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:37:48,203 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:37:48,205 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:37:48,206 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:37:48,207 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:37:48,208 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:37:48,209 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:37:48,210 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:37:48,374 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:37:48,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:48,426 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:37:48,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:37:48,465 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-23 03:37:48,466 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-23 03:37:48,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,533 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,538 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,607 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:37:48,608 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:37:48,609 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:37:48,610 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:37:48,611 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:37:48,612 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:37:48,613 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:37:48,614 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:37:48,614 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:37:48,615 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:37:48,647 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:37:48,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:48,675 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:37:48,688 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-23 03:37:48,689 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_31893fed-e32c-4e8f-b128-43092c6a1123/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-23 03:37:48,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,782 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,783 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,784 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 03:37:48,820 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 03:37:48,821 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 03:37:48,821 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 03:37:48,822 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 03:37:48,823 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 03:37:48,824 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 03:37:48,824 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 03:37:48,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 03:37:48,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 03:37:48,826 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 03:37:48,856 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 03:37:48,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:49,214 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:37:49,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49 WrapperNode [2021-11-23 03:37:49,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:49,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:49,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:37:49,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:37:49,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,390 INFO L137 Inliner]: procedures = 698, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 215 [2021-11-23 03:37:49,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:49,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:37:49,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:37:49,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:37:49,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:37:49,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:37:49,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:37:49,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:37:49,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (1/1) ... [2021-11-23 03:37:49,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:49,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:37:49,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:37:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-23 03:37:49,537 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-23 03:37:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:37:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:37:49,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:37:49,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:37:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-23 03:37:49,538 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-23 03:37:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-11-23 03:37:49,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-11-23 03:37:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:37:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-23 03:37:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-23 03:37:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:37:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:37:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:37:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:37:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-23 03:37:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-23 03:37:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:37:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:37:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:37:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:37:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:37:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 03:37:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 03:37:49,760 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:37:49,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:37:50,711 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:37:50,719 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:37:50,720 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:37:50,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:50 BoogieIcfgContainer [2021-11-23 03:37:50,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:37:50,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:37:50,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:37:50,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:37:50,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:37:46" (1/3) ... [2021-11-23 03:37:50,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50815a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:50, skipping insertion in model container [2021-11-23 03:37:50,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:49" (2/3) ... [2021-11-23 03:37:50,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50815a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:50, skipping insertion in model container [2021-11-23 03:37:50,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:50" (3/3) ... [2021-11-23 03:37:50,731 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-23 03:37:50,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:37:50,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:37:50,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:37:50,794 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:37:50,794 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:37:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-23 03:37:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 03:37:50,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:50,827 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:50,827 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2021-11-23 03:37:50,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:37:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507385432] [2021-11-23 03:37:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:50,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:37:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:37:50,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:37:50,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:37:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:37:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:37:51,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 03:37:51,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:37:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507385432] [2021-11-23 03:37:51,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507385432] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:51,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:51,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-23 03:37:51,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026154074] [2021-11-23 03:37:51,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:37:51,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:37:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:37:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:37:51,777 INFO L87 Difference]: Start difference. First operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:37:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:51,822 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2021-11-23 03:37:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:37:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2021-11-23 03:37:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:51,835 INFO L225 Difference]: With dead ends: 225 [2021-11-23 03:37:51,835 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:37:51,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:37:51,845 INFO L933 BasicCegarLoop]: 155 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, 155 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:51,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:37:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-23 03:37:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-23 03:37:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2021-11-23 03:37:51,897 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2021-11-23 03:37:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:51,898 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2021-11-23 03:37:51,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:37:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2021-11-23 03:37:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 03:37:51,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:51,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:51,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:52,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:37:52,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2021-11-23 03:37:52,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:37:52,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590697226] [2021-11-23 03:37:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:52,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:37:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:37:52,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:37:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:37:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:37:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 03:37:52,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:37:53,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:37:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590697226] [2021-11-23 03:37:53,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590697226] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:53,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:53,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 03:37:53,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075029032] [2021-11-23 03:37:53,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:53,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:37:53,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:37:53,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:37:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:37:53,200 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:37:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:53,979 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-11-23 03:37:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:37:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-11-23 03:37:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:53,985 INFO L225 Difference]: With dead ends: 211 [2021-11-23 03:37:53,985 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 03:37:53,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:37:53,987 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 76 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:53,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 469 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:37:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 03:37:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 03:37:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 83 states have internal predecessors, (103), 35 states have call successors, (35), 8 states have call predecessors, (35), 9 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-23 03:37:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 175 transitions. [2021-11-23 03:37:54,009 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 175 transitions. Word has length 101 [2021-11-23 03:37:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:54,010 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 175 transitions. [2021-11-23 03:37:54,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:37:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 175 transitions. [2021-11-23 03:37:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 03:37:54,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:54,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:54,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:54,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:37:54,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash 993722959, now seen corresponding path program 1 times [2021-11-23 03:37:54,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:37:54,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031364545] [2021-11-23 03:37:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:54,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:37:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:37:54,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:37:54,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:37:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:37:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:37:54,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 03:37:55,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:37:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031364545] [2021-11-23 03:37:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031364545] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:55,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:55,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-23 03:37:55,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992336397] [2021-11-23 03:37:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:55,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:37:55,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:37:55,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:37:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:37:55,132 INFO L87 Difference]: Start difference. First operand 123 states and 175 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 03:37:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:55,266 INFO L93 Difference]: Finished difference Result 231 states and 340 transitions. [2021-11-23 03:37:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:37:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-23 03:37:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:55,270 INFO L225 Difference]: With dead ends: 231 [2021-11-23 03:37:55,271 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 03:37:55,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:37:55,273 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:55,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 687 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 03:37:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-23 03:37:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 85 states have internal predecessors, (104), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:37:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-23 03:37:55,296 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 101 [2021-11-23 03:37:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:55,296 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-23 03:37:55,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 03:37:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-23 03:37:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 03:37:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:55,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2021-11-23 03:37:55,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:37:55,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1588307531, now seen corresponding path program 1 times [2021-11-23 03:37:55,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:37:55,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465026529] [2021-11-23 03:37:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:55,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:37:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:37:55,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:37:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:37:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:37:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 03:37:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:37:56,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:37:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465026529] [2021-11-23 03:37:56,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465026529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:56,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:56,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-23 03:37:56,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372037753] [2021-11-23 03:37:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:56,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:37:56,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:37:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:37:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:37:56,524 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:37:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:57,498 INFO L93 Difference]: Finished difference Result 239 states and 361 transitions. [2021-11-23 03:37:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:37:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-11-23 03:37:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:57,501 INFO L225 Difference]: With dead ends: 239 [2021-11-23 03:37:57,501 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 03:37:57,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:37:57,503 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 70 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:57,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 641 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:37:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 03:37:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2021-11-23 03:37:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 85 states have internal predecessors, (104), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:37:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-23 03:37:57,524 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 103 [2021-11-23 03:37:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:57,524 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-23 03:37:57,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:37:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-23 03:37:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 03:37:57,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:57,527 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2021-11-23 03:37:57,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:57,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:37:57,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1973008072, now seen corresponding path program 1 times [2021-11-23 03:37:57,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:37:57,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801892490] [2021-11-23 03:37:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:57,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:37:57,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:37:57,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:37:57,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:37:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:37:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 03:37:58,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:37:58,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:37:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801892490] [2021-11-23 03:37:58,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801892490] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:58,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:58,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-23 03:37:58,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806019111] [2021-11-23 03:37:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:58,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:37:58,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:37:58,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:37:58,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:37:58,808 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:38:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:00,879 INFO L93 Difference]: Finished difference Result 260 states and 402 transitions. [2021-11-23 03:38:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:38:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-11-23 03:38:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:00,882 INFO L225 Difference]: With dead ends: 260 [2021-11-23 03:38:00,882 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 03:38:00,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:38:00,885 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 98 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:00,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 752 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 03:38:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 03:38:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 126. [2021-11-23 03:38:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.325) internal successors, (106), 86 states have internal predecessors, (106), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:38:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2021-11-23 03:38:00,919 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 105 [2021-11-23 03:38:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:00,920 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2021-11-23 03:38:00,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:38:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2021-11-23 03:38:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 03:38:00,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:00,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2021-11-23 03:38:00,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:01,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -172700770, now seen corresponding path program 1 times [2021-11-23 03:38:01,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527579486] [2021-11-23 03:38:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:01,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:01,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:01,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:38:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:38:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:38:01,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 03:38:01,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:01,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527579486] [2021-11-23 03:38:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527579486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:01,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:01,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3] total 8 [2021-11-23 03:38:01,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212621847] [2021-11-23 03:38:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:01,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:38:01,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:38:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:38:01,997 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:38:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:03,274 INFO L93 Difference]: Finished difference Result 249 states and 393 transitions. [2021-11-23 03:38:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:38:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 106 [2021-11-23 03:38:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:03,278 INFO L225 Difference]: With dead ends: 249 [2021-11-23 03:38:03,278 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 03:38:03,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:38:03,280 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 79 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:03,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 638 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:38:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 03:38:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-11-23 03:38:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 89 states have internal predecessors, (110), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:38:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 188 transitions. [2021-11-23 03:38:03,299 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 188 transitions. Word has length 106 [2021-11-23 03:38:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:03,299 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 188 transitions. [2021-11-23 03:38:03,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:38:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 188 transitions. [2021-11-23 03:38:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 03:38:03,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:03,302 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2021-11-23 03:38:03,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 03:38:03,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:03,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1129641728, now seen corresponding path program 1 times [2021-11-23 03:38:03,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500592489] [2021-11-23 03:38:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:03,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:03,523 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:03,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:38:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:03,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:38:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:38:04,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 03:38:04,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500592489] [2021-11-23 03:38:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500592489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:04,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:04,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-23 03:38:04,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604767409] [2021-11-23 03:38:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:04,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:38:04,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:38:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:38:04,401 INFO L87 Difference]: Start difference. First operand 129 states and 188 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:04,553 INFO L93 Difference]: Finished difference Result 247 states and 373 transitions. [2021-11-23 03:38:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:38:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 114 [2021-11-23 03:38:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:04,558 INFO L225 Difference]: With dead ends: 247 [2021-11-23 03:38:04,559 INFO L226 Difference]: Without dead ends: 137 [2021-11-23 03:38:04,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:38:04,560 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 4 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:04,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 859 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-23 03:38:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-11-23 03:38:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 90 states have internal predecessors, (111), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:38:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2021-11-23 03:38:04,576 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 114 [2021-11-23 03:38:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:04,577 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2021-11-23 03:38:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2021-11-23 03:38:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:38:04,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:04,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2021-11-23 03:38:04,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:04,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:04,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -369213267, now seen corresponding path program 1 times [2021-11-23 03:38:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773320426] [2021-11-23 03:38:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:04,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:04,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:04,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:38:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:05,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:38:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:38:06,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:07,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:07,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773320426] [2021-11-23 03:38:07,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773320426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [17121273] [2021-11-23 03:38:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:07,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:07,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:07,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:38:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:38:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 03:38:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 03:38:07,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [17121273] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:07,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:07,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 8, 4] total 18 [2021-11-23 03:38:07,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153269264] [2021-11-23 03:38:07,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:07,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:38:07,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:38:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:38:07,785 INFO L87 Difference]: Start difference. First operand 130 states and 189 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:07,840 INFO L93 Difference]: Finished difference Result 243 states and 362 transitions. [2021-11-23 03:38:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:38:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-23 03:38:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:07,845 INFO L225 Difference]: With dead ends: 243 [2021-11-23 03:38:07,845 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 03:38:07,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 444 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:38:07,847 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 21 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:07,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 431 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:38:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 03:38:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-11-23 03:38:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 90 states have internal predecessors, (110), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:38:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 188 transitions. [2021-11-23 03:38:07,860 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 188 transitions. Word has length 116 [2021-11-23 03:38:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 188 transitions. [2021-11-23 03:38:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 188 transitions. [2021-11-23 03:38:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:38:07,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:07,864 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:38:07,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-23 03:38:08,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:08,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:08,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -121066773, now seen corresponding path program 1 times [2021-11-23 03:38:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099085967] [2021-11-23 03:38:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:08,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:08,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:08,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 03:38:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:38:08,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:38:09,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:10,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099085967] [2021-11-23 03:38:10,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099085967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525866847] [2021-11-23 03:38:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:10,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:10,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:10,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 03:38:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:38:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:38:10,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 03:38:10,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525866847] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:10,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:10,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 5] total 19 [2021-11-23 03:38:10,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924145681] [2021-11-23 03:38:10,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:10,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:38:10,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:38:10,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:38:10,953 INFO L87 Difference]: Start difference. First operand 130 states and 188 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:11,050 INFO L93 Difference]: Finished difference Result 249 states and 385 transitions. [2021-11-23 03:38:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:38:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-23 03:38:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:11,056 INFO L225 Difference]: With dead ends: 249 [2021-11-23 03:38:11,056 INFO L226 Difference]: Without dead ends: 138 [2021-11-23 03:38:11,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:38:11,059 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 24 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:11,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 569 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:38:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-23 03:38:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-23 03:38:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 92 states have internal predecessors, (111), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-23 03:38:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2021-11-23 03:38:11,071 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 116 [2021-11-23 03:38:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:11,071 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2021-11-23 03:38:11,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2021-11-23 03:38:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:38:11,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:11,074 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:11,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:11,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:11,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:11,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1492874071, now seen corresponding path program 1 times [2021-11-23 03:38:11,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:11,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315817873] [2021-11-23 03:38:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:11,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:11,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:11,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:11,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 03:38:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:38:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:38:12,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:13,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315817873] [2021-11-23 03:38:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315817873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293774489] [2021-11-23 03:38:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:13,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:13,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:13,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 03:38:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:38:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:38:13,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 03:38:13,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293774489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:13,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:13,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8, 6] total 20 [2021-11-23 03:38:13,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698461784] [2021-11-23 03:38:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:13,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:38:13,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:38:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:38:13,991 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:14,185 INFO L93 Difference]: Finished difference Result 245 states and 373 transitions. [2021-11-23 03:38:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:38:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-23 03:38:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:14,187 INFO L225 Difference]: With dead ends: 245 [2021-11-23 03:38:14,188 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 03:38:14,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:38:14,190 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 19 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:14,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 699 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 03:38:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-11-23 03:38:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.216867469879518) internal successors, (101), 89 states have internal predecessors, (101), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:38:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2021-11-23 03:38:14,201 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 116 [2021-11-23 03:38:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:14,202 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2021-11-23 03:38:14,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:38:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2021-11-23 03:38:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:38:14,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:14,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:14,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:14,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:14,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:14,606 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1772733927, now seen corresponding path program 1 times [2021-11-23 03:38:14,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:14,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92256319] [2021-11-23 03:38:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:14,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:14,608 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:14,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 03:38:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:38:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 03:38:15,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:16,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92256319] [2021-11-23 03:38:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92256319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690306811] [2021-11-23 03:38:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:16,440 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:16,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:16,453 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:16,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 03:38:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:16,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:38:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:38:17,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 03:38:17,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [690306811] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:17,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-23 03:38:17,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056509548] [2021-11-23 03:38:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:38:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:38:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:38:17,300 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:17,573 INFO L93 Difference]: Finished difference Result 248 states and 359 transitions. [2021-11-23 03:38:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:38:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 116 [2021-11-23 03:38:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:17,577 INFO L225 Difference]: With dead ends: 248 [2021-11-23 03:38:17,577 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 03:38:17,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:38:17,579 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 8 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:17,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1023 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 03:38:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-23 03:38:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 90 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-23 03:38:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-11-23 03:38:17,592 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 116 [2021-11-23 03:38:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:17,593 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-11-23 03:38:17,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-11-23 03:38:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 03:38:17,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:17,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:17,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:17,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:17,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:17,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash 147277827, now seen corresponding path program 1 times [2021-11-23 03:38:17,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:17,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774801177] [2021-11-23 03:38:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:17,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:18,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:18,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 03:38:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:38:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 03:38:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:18,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774801177] [2021-11-23 03:38:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774801177] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:18,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:18,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 03:38:18,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829644905] [2021-11-23 03:38:18,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:18,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:38:18,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:38:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:38:18,807 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:19,260 INFO L93 Difference]: Finished difference Result 238 states and 331 transitions. [2021-11-23 03:38:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:38:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 117 [2021-11-23 03:38:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:19,263 INFO L225 Difference]: With dead ends: 238 [2021-11-23 03:38:19,263 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 03:38:19,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:38:19,264 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 47 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:19,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 470 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:38:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 03:38:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-23 03:38:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-11-23 03:38:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-11-23 03:38:19,279 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 117 [2021-11-23 03:38:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:19,280 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-11-23 03:38:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-11-23 03:38:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 03:38:19,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:19,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 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] [2021-11-23 03:38:19,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:19,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:19,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2021-11-23 03:38:19,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905972945] [2021-11-23 03:38:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:19,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:19,510 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:19,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 03:38:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:38:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 03:38:20,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 03:38:20,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905972945] [2021-11-23 03:38:20,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905972945] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:20,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:20,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-23 03:38:20,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752053016] [2021-11-23 03:38:20,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:20,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:38:20,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:38:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:38:20,284 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:20,407 INFO L93 Difference]: Finished difference Result 242 states and 337 transitions. [2021-11-23 03:38:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:38:20,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2021-11-23 03:38:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:20,410 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:38:20,410 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 03:38:20,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:38:20,414 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:20,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 687 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 03:38:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-23 03:38:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 94 states have internal predecessors, (104), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-23 03:38:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2021-11-23 03:38:20,428 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 117 [2021-11-23 03:38:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2021-11-23 03:38:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2021-11-23 03:38:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 03:38:20,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:20,433 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:38:20,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:20,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:20,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1150330055, now seen corresponding path program 1 times [2021-11-23 03:38:20,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:20,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185113171] [2021-11-23 03:38:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:20,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:20,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 03:38:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:38:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 03:38:21,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:21,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185113171] [2021-11-23 03:38:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185113171] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:21,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:21,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-23 03:38:21,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958193121] [2021-11-23 03:38:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:38:21,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:38:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:38:21,531 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:22,760 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2021-11-23 03:38:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:38:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 119 [2021-11-23 03:38:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:22,763 INFO L225 Difference]: With dead ends: 247 [2021-11-23 03:38:22,763 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 03:38:22,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:38:22,765 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 69 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 649 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:38:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 03:38:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-11-23 03:38:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.206896551724138) internal successors, (105), 95 states have internal predecessors, (105), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-23 03:38:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2021-11-23 03:38:22,776 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 119 [2021-11-23 03:38:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:22,776 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2021-11-23 03:38:22,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2021-11-23 03:38:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 03:38:22,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:22,779 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:22,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:22,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:22,995 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 787509940, now seen corresponding path program 1 times [2021-11-23 03:38:22,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721311616] [2021-11-23 03:38:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:22,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:22,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:22,997 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:23,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 03:38:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:23,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:38:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 03:38:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 03:38:23,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721311616] [2021-11-23 03:38:23,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721311616] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:23,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:23,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-23 03:38:23,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652167096] [2021-11-23 03:38:23,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:23,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:38:23,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:38:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:38:23,936 INFO L87 Difference]: Start difference. First operand 134 states and 187 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:25,797 INFO L93 Difference]: Finished difference Result 253 states and 358 transitions. [2021-11-23 03:38:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:38:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 121 [2021-11-23 03:38:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:25,801 INFO L225 Difference]: With dead ends: 253 [2021-11-23 03:38:25,801 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 03:38:25,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:38:25,803 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 92 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:25,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 763 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 03:38:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 03:38:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2021-11-23 03:38:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-23 03:38:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 181 transitions. [2021-11-23 03:38:25,829 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 181 transitions. Word has length 121 [2021-11-23 03:38:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:25,830 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 181 transitions. [2021-11-23 03:38:25,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 03:38:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 181 transitions. [2021-11-23 03:38:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 03:38:25,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:25,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 03:38:25,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:26,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:26,056 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1331296970, now seen corresponding path program 1 times [2021-11-23 03:38:26,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:26,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426755259] [2021-11-23 03:38:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:26,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:26,059 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:26,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 03:38:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:38:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 03:38:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 03:38:26,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426755259] [2021-11-23 03:38:26,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426755259] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:26,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:26,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-23 03:38:26,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485241555] [2021-11-23 03:38:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:26,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:38:26,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:38:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:38:26,851 INFO L87 Difference]: Start difference. First operand 131 states and 181 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:26,969 INFO L93 Difference]: Finished difference Result 248 states and 346 transitions. [2021-11-23 03:38:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:38:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-11-23 03:38:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:26,971 INFO L225 Difference]: With dead ends: 248 [2021-11-23 03:38:26,971 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 03:38:26,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:38:26,973 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 4 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:26,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 853 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 03:38:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-11-23 03:38:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 93 states have internal predecessors, (104), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-23 03:38:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-11-23 03:38:26,987 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 130 [2021-11-23 03:38:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:26,987 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-11-23 03:38:26,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:38:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-11-23 03:38:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 03:38:26,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:26,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:27,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:27,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:38:27,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1396943881, now seen corresponding path program 2 times [2021-11-23 03:38:27,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313813646] [2021-11-23 03:38:27,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:38:27,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:27,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:27,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:27,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 03:38:28,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:38:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:38:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:38:29,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 03:38:29,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313813646] [2021-11-23 03:38:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313813646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [739828601] [2021-11-23 03:38:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:38:29,912 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:29,913 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:29,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 03:38:30,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:38:30,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:38:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 03:38:31,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-23 03:38:31,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [739828601] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:31,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:31,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-23 03:38:31,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063887416] [2021-11-23 03:38:31,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:31,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:38:31,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:38:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:38:31,754 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:38:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:32,039 INFO L93 Difference]: Finished difference Result 249 states and 346 transitions. [2021-11-23 03:38:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:38:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 132 [2021-11-23 03:38:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:32,042 INFO L225 Difference]: With dead ends: 249 [2021-11-23 03:38:32,042 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 03:38:32,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:38:32,044 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 8 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:32,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 995 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:38:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 03:38:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-23 03:38:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 90 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-23 03:38:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2021-11-23 03:38:32,056 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 132 [2021-11-23 03:38:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:32,057 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2021-11-23 03:38:32,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:38:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2021-11-23 03:38:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 03:38:32,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:32,059 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:32,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:32,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 03:38:32,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:32,472 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -659240699, now seen corresponding path program 2 times [2021-11-23 03:38:32,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:38:32,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187136335] [2021-11-23 03:38:32,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:38:32,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:38:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:38:32,474 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:38:32,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 03:38:34,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:38:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 03:38:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:36,734 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 15 treesize of output 7 [2021-11-23 03:38:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 03:38:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:38:36,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:40,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:38:40,320 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 46 treesize of output 49 [2021-11-23 03:38:40,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:38:40,401 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 45 treesize of output 66 [2021-11-23 03:38:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:38:40,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:38:40,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187136335] [2021-11-23 03:38:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187136335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:40,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977339996] [2021-11-23 03:38:40,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:38:40,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:38:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:38:40,929 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:38:40,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 03:38:42,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:38:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:38:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:43,686 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 15 treesize of output 7 [2021-11-23 03:38:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 03:38:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 03:38:43,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:44,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:38:44,765 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 26 treesize of output 29 [2021-11-23 03:38:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 03:38:45,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977339996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192844779] [2021-11-23 03:38:45,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:38:45,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:45,888 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 03:38:51,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:38:51,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:38:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:53,077 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 15 treesize of output 7 [2021-11-23 03:38:53,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 03:38:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 03:38:53,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:53,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:38:53,760 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 36 treesize of output 39 [2021-11-23 03:38:53,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:38:53,784 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 38 [2021-11-23 03:38:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 03:38:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192844779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:54,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:38:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12, 9, 12, 9] total 34 [2021-11-23 03:38:54,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561474894] [2021-11-23 03:38:54,118 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:38:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 03:38:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:38:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 03:38:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:38:54,121 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-23 03:39:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:07,115 INFO L93 Difference]: Finished difference Result 452 states and 748 transitions. [2021-11-23 03:39:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 03:39:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) Word has length 133 [2021-11-23 03:39:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:07,119 INFO L225 Difference]: With dead ends: 452 [2021-11-23 03:39:07,120 INFO L226 Difference]: Without dead ends: 337 [2021-11-23 03:39:07,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 753 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=347, Invalid=2103, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:39:07,123 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 351 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:07,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 3207 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1944 Invalid, 0 Unknown, 795 Unchecked, 11.2s Time] [2021-11-23 03:39:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-23 03:39:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 177. [2021-11-23 03:39:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 128 states have internal predecessors, (148), 41 states have call successors, (41), 11 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 39 states have call successors, (52) [2021-11-23 03:39:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2021-11-23 03:39:07,153 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 133 [2021-11-23 03:39:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:07,154 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2021-11-23 03:39:07,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-23 03:39:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2021-11-23 03:39:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 03:39:07,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:07,156 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:07,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:07,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-23 03:39:07,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-23 03:39:07,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:07,776 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1992797946, now seen corresponding path program 3 times [2021-11-23 03:39:07,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:39:07,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426618578] [2021-11-23 03:39:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:39:07,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:39:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:39:07,779 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:39:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 03:39:11,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:39:11,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:39:11,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:39:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 03:39:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:14,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:39:14,443 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 36 treesize of output 39 [2021-11-23 03:39:14,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:39:14,473 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 38 [2021-11-23 03:39:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-23 03:39:14,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:39:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426618578] [2021-11-23 03:39:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426618578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [643565272] [2021-11-23 03:39:14,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:39:14,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:39:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:39:14,897 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:39:14,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31893fed-e32c-4e8f-b128-43092c6a1123/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 03:39:16,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:39:16,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:39:16,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 03:39:16,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:16,791 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 11 treesize of output 9 [2021-11-23 03:39:17,129 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-11-23 03:39:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 03:39:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:17,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-23 03:39:20,209 WARN L860 $PredicateComparison]: unable to prove that (exists ((ensure_linked_list_is_allocated_~curr~0.offset (_ BitVec 64)) (ensure_linked_list_is_allocated_~list.offset (_ BitVec 64))) (let ((.cse0 (bvadd (_ bv8 64) ensure_linked_list_is_allocated_~list.offset)) (.cse1 (bvadd ensure_linked_list_is_allocated_~list.offset (_ bv16 64))) (.cse2 (bvadd ensure_linked_list_is_allocated_~list.offset (_ bv24 64)))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base|) .cse0 (_ bv0 64)) .cse1 (_ bv0 64)) ensure_linked_list_is_allocated_~curr~0.offset .cse1) .cse2 ensure_linked_list_is_allocated_~curr~0.offset))) (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base|) .cse0 (_ bv0 64)) .cse1 (_ bv0 64)) ensure_linked_list_is_allocated_~curr~0.offset |c_ensure_linked_list_is_allocated_#in~list.base|) .cse2 |c_ensure_linked_list_is_allocated_#in~list.base|)) |c_#memory_$Pointer$.base|)))) is different from true [2021-11-23 03:39:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:35,472 WARN L227 SmtUtils]: Spent 15.20s on a formula simplification. DAG size of input: 92 DAG size of output: 35 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:39:35,473 INFO L354 Elim1Store]: treesize reduction 483, result has 12.7 percent of original size [2021-11-23 03:39:35,474 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 6 case distinctions, treesize of input 93 treesize of output 135 [2021-11-23 03:39:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,885 WARN L227 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 97 DAG size of output: 38 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:39:49,886 INFO L354 Elim1Store]: treesize reduction 483, result has 14.2 percent of original size [2021-11-23 03:39:49,887 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 6 case distinctions, treesize of input 129 treesize of output 179