./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P --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-53f42b1 [2021-11-21 01:43:56,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:43:56,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:43:56,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:43:56,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:43:56,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:43:56,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:43:56,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:43:56,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:43:56,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:43:56,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:43:56,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:43:56,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:43:56,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:43:56,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:43:56,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:43:56,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:43:56,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:43:56,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:43:56,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:43:56,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:43:56,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:43:56,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:43:56,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:43:56,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:43:56,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:43:56,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:43:56,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:43:56,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:43:56,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:43:56,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:43:56,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:43:56,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:43:56,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:43:56,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:43:56,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:43:56,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:43:56,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:43:56,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:43:56,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:43:56,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:43:56,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:43:56,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:43:56,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:43:56,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:43:56,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:43:56,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:43:56,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:43:56,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:43:56,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:43:56,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:43:56,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:43:56,717 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:43:56,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:43:56,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:43:56,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:43:56,718 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:43:56,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:43:56,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:43:56,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:43:56,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:43:56,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:43:56,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:43:56,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:43:56,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:43:56,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:43:56,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:43:56,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:43:56,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:43:56,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:43:56,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:43:56,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:43:56,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:43:56,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:43:56,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:43:56,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:43:56,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:43:56,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:43:56,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:43:56,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:43:56,725 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-21 01:43:57,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:43:57,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:43:57,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:43:57,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:43:57,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:43:57,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-21 01:43:57,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/67bfd599a/baacdcfc4aab448683a8dafaf12a092b/FLAG4944b26f2 [2021-11-21 01:43:57,913 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:43:57,914 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-21 01:43:57,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/67bfd599a/baacdcfc4aab448683a8dafaf12a092b/FLAG4944b26f2 [2021-11-21 01:43:58,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/67bfd599a/baacdcfc4aab448683a8dafaf12a092b [2021-11-21 01:43:58,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:43:58,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:43:58,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:43:58,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:43:58,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:43:58,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:43:58" (1/1) ... [2021-11-21 01:43:58,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9b13b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:58, skipping insertion in model container [2021-11-21 01:43:58,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:43:58" (1/1) ... [2021-11-21 01:43:58,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:43:58,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:43:58,893 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-21 01:43:58,903 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-21 01:43:59,751 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,753 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,770 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:43:59,778 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,120 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:44:00,122 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:44:00,123 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:44:00,124 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:44:00,126 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:44:00,127 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:44:00,127 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:44:00,128 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:44:00,129 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:44:00,130 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:44:00,317 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:44:00,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:00,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:44:00,452 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-21 01:44:00,453 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-21 01:44:00,550 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,551 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,551 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,552 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,553 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,561 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,561 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:44:00,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:44:00,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:44:00,606 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:44:00,607 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:44:00,608 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:44:00,608 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:44:00,609 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:44:00,610 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:44:00,610 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:44:00,611 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:44:00,648 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:44:00,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:00,907 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:44:00,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00 WrapperNode [2021-11-21 01:44:00,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:00,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:00,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:44:00,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:44:00,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,055 INFO L137 Inliner]: procedures = 679, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 214 [2021-11-21 01:44:01,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:01,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:44:01,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:44:01,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:44:01,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:44:01,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:44:01,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:44:01,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:44:01,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (1/1) ... [2021-11-21 01:44:01,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:01,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:01,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:44:01,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:44:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-21 01:44:01,254 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-21 01:44:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:44:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:44:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:44:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:44:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:44:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-11-21 01:44:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-11-21 01:44:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:44:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 01:44:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 01:44:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:44:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:44:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:44:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:44:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-21 01:44:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-21 01:44:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:44:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:44:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:44:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:44:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:44:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:44:01,262 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:44:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:44:01,602 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:44:01,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:44:02,080 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:44:02,173 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:44:02,173 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:44:02,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:02 BoogieIcfgContainer [2021-11-21 01:44:02,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:44:02,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:44:02,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:44:02,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:44:02,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:43:58" (1/3) ... [2021-11-21 01:44:02,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733a225d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:02, skipping insertion in model container [2021-11-21 01:44:02,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:00" (2/3) ... [2021-11-21 01:44:02,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733a225d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:02, skipping insertion in model container [2021-11-21 01:44:02,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:02" (3/3) ... [2021-11-21 01:44:02,194 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-21 01:44:02,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:44:02,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:44:02,246 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:44:02,253 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 [2021-11-21 01:44:02,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:44:02,271 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) [2021-11-21 01:44:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:44:02,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:02,280 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] [2021-11-21 01:44:02,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1308370605, now seen corresponding path program 1 times [2021-11-21 01:44:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451479068] [2021-11-21 01:44:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:02,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:44:02,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451479068] [2021-11-21 01:44:02,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451479068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:02,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123657449] [2021-11-21 01:44:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:02,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:02,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:02,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:44:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:44:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:44:03,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:03,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123657449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:03,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:03,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2021-11-21 01:44:03,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896106292] [2021-11-21 01:44:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:44:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:44:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:44:03,609 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) [2021-11-21 01:44:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:04,105 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2021-11-21 01:44:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:44:04,107 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 [2021-11-21 01:44:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:04,120 INFO L225 Difference]: With dead ends: 166 [2021-11-21 01:44:04,120 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 01:44:04,128 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 [2021-11-21 01:44:04,133 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 [2021-11-21 01:44:04,139 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] [2021-11-21 01:44:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 01:44:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-21 01:44:04,205 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) [2021-11-21 01:44:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2021-11-21 01:44:04,212 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2021-11-21 01:44:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:04,213 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2021-11-21 01:44:04,213 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) [2021-11-21 01:44:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2021-11-21 01:44:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:44:04,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:04,220 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] [2021-11-21 01:44:04,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:04,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:44:04,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash -825605775, now seen corresponding path program 1 times [2021-11-21 01:44:04,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:04,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502387239] [2021-11-21 01:44:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:04,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:04,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502387239] [2021-11-21 01:44:04,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502387239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884576348] [2021-11-21 01:44:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:04,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:04,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:04,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:44:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:44:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:44:05,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884576348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:05,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:05,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 01:44:05,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913598027] [2021-11-21 01:44:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:44:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:44:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:44:05,076 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) [2021-11-21 01:44:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:05,484 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2021-11-21 01:44:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:44:05,485 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 [2021-11-21 01:44:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:05,488 INFO L225 Difference]: With dead ends: 163 [2021-11-21 01:44:05,488 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:44:05,489 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 [2021-11-21 01:44:05,491 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:05,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:44:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:44:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 01:44:05,507 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) [2021-11-21 01:44:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2021-11-21 01:44:05,509 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2021-11-21 01:44:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:05,510 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2021-11-21 01:44:05,510 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) [2021-11-21 01:44:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2021-11-21 01:44:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:44:05,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:05,513 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] [2021-11-21 01:44:05,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:05,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:05,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2097948773, now seen corresponding path program 1 times [2021-11-21 01:44:05,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936697945] [2021-11-21 01:44:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:05,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:05,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936697945] [2021-11-21 01:44:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936697945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205523244] [2021-11-21 01:44:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:05,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:05,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:05,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:44:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:44:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:44:06,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:06,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205523244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:06,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 01:44:06,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137313274] [2021-11-21 01:44:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:06,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:44:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:44:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:44:06,364 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) [2021-11-21 01:44:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:06,858 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2021-11-21 01:44:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:44:06,859 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 [2021-11-21 01:44:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:06,862 INFO L225 Difference]: With dead ends: 178 [2021-11-21 01:44:06,862 INFO L226 Difference]: Without dead ends: 102 [2021-11-21 01:44:06,863 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 [2021-11-21 01:44:06,864 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 [2021-11-21 01:44:06,864 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] [2021-11-21 01:44:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-21 01:44:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-11-21 01:44:06,881 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) [2021-11-21 01:44:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2021-11-21 01:44:06,883 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2021-11-21 01:44:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:06,884 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2021-11-21 01:44:06,884 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) [2021-11-21 01:44:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2021-11-21 01:44:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:44:06,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:06,887 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] [2021-11-21 01:44:06,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:07,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:07,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash -921720928, now seen corresponding path program 1 times [2021-11-21 01:44:07,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:07,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819849297] [2021-11-21 01:44:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:07,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:07,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:07,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819849297] [2021-11-21 01:44:07,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819849297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926927985] [2021-11-21 01:44:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:07,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:07,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:07,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:44:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:44:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:44:07,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926927985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:07,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:07,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-21 01:44:07,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211994188] [2021-11-21 01:44:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:07,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:07,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:44:07,648 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) [2021-11-21 01:44:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:07,699 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2021-11-21 01:44:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:07,703 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 [2021-11-21 01:44:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:07,705 INFO L225 Difference]: With dead ends: 179 [2021-11-21 01:44:07,706 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 01:44:07,707 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 [2021-11-21 01:44:07,708 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 [2021-11-21 01:44:07,708 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] [2021-11-21 01:44:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 01:44:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2021-11-21 01:44:07,724 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) [2021-11-21 01:44:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-11-21 01:44:07,726 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2021-11-21 01:44:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:07,726 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-11-21 01:44:07,727 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) [2021-11-21 01:44:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-11-21 01:44:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:44:07,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:07,729 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] [2021-11-21 01:44:07,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:07,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:07,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1389593974, now seen corresponding path program 1 times [2021-11-21 01:44:07,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874281738] [2021-11-21 01:44:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:07,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:44:08,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874281738] [2021-11-21 01:44:08,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874281738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733949257] [2021-11-21 01:44:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:08,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:08,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:08,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:44:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:08,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:44:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:44:08,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:08,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733949257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:08,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:08,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2021-11-21 01:44:08,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508268251] [2021-11-21 01:44:08,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:44:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:44:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:44:08,531 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) [2021-11-21 01:44:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:08,928 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2021-11-21 01:44:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:44:08,928 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 [2021-11-21 01:44:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:08,930 INFO L225 Difference]: With dead ends: 178 [2021-11-21 01:44:08,931 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 01:44:08,931 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 [2021-11-21 01:44:08,932 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 [2021-11-21 01:44:08,932 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] [2021-11-21 01:44:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 01:44:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-11-21 01:44:08,946 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) [2021-11-21 01:44:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2021-11-21 01:44:08,948 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2021-11-21 01:44:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:08,948 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2021-11-21 01:44:08,949 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) [2021-11-21 01:44:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2021-11-21 01:44:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:44:08,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:08,951 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] [2021-11-21 01:44:08,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:09,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:09,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:09,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1370238580, now seen corresponding path program 1 times [2021-11-21 01:44:09,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758440087] [2021-11-21 01:44:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:09,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:09,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:09,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758440087] [2021-11-21 01:44:09,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758440087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105176497] [2021-11-21 01:44:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:09,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:09,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:09,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:44:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 01:44:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:44:09,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:44:09,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105176497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:09,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:44:09,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-21 01:44:09,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576464277] [2021-11-21 01:44:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:09,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:44:09,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:44:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:44:09,847 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) [2021-11-21 01:44:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:10,297 INFO L93 Difference]: Finished difference Result 183 states and 279 transitions. [2021-11-21 01:44:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:44:10,297 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 [2021-11-21 01:44:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:10,299 INFO L225 Difference]: With dead ends: 183 [2021-11-21 01:44:10,299 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:44:10,300 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 [2021-11-21 01:44:10,301 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 [2021-11-21 01:44:10,301 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] [2021-11-21 01:44:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:44:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2021-11-21 01:44:10,314 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) [2021-11-21 01:44:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 138 transitions. [2021-11-21 01:44:10,316 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 138 transitions. Word has length 72 [2021-11-21 01:44:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:10,317 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 138 transitions. [2021-11-21 01:44:10,317 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) [2021-11-21 01:44:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 138 transitions. [2021-11-21 01:44:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:44:10,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:10,319 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] [2021-11-21 01:44:10,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:10,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:44:10,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -782095385, now seen corresponding path program 1 times [2021-11-21 01:44:10,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:10,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100848140] [2021-11-21 01:44:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:10,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:10,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:10,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100848140] [2021-11-21 01:44:10,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100848140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:10,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951028953] [2021-11-21 01:44:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:10,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:10,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:10,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:44:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:44:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:44:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:44:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951028953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113547040] [2021-11-21 01:44:11,451 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-21 01:44:11,452 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:44:11,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:44:11,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:44:11,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:44:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:11,741 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-21 01:44:11,742 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 [2021-11-21 01:44:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:11,855 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 [2021-11-21 01:44:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,508 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 [2021-11-21 01:44:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,533 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 [2021-11-21 01:44:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,549 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 [2021-11-21 01:44:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,558 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 [2021-11-21 01:44:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,594 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 [2021-11-21 01:44:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,611 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 [2021-11-21 01:44:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,644 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 [2021-11-21 01:44:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,668 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 [2021-11-21 01:44:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,751 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 [2021-11-21 01:44:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2021-11-21 01:44:12,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,868 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 [2021-11-21 01:44:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:12,892 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 [2021-11-21 01:44:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,314 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 [2021-11-21 01:44:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2021-11-21 01:44:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,416 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 [2021-11-21 01:44:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:13,448 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 [2021-11-21 01:44:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:44:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 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 [2021-11-21 01:44:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:14,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 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 [2021-11-21 01:44:14,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:44:15,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:44:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 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 [2021-11-21 01:44:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:44:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 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 [2021-11-21 01:44:15,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:44:15,732 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:44:15,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:44:15,804 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:44:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:44:36,551 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 146 for LOIs [2021-11-21 01:44:42,413 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 257 for LOIs [2021-11-21 01:44:48,871 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 186 for LOIs [2021-11-21 01:45:00,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:00,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:00,799 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) 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:116) 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) [2021-11-21 01:45:00,802 INFO L158 Benchmark]: Toolchain (without parser) took 62328.74ms. Allocated memory was 104.9MB in the beginning and 388.0MB in the end (delta: 283.1MB). Free memory was 79.6MB in the beginning and 233.5MB in the end (delta: -153.9MB). Peak memory consumption was 129.2MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,802 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:45:00,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2431.93ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 79.2MB in the beginning and 63.8MB in the end (delta: 15.4MB). Peak memory consumption was 53.2MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,803 INFO L158 Benchmark]: Boogie Procedure Inliner took 146.66ms. Allocated memory is still 134.2MB. Free memory was 63.8MB in the beginning and 58.3MB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,804 INFO L158 Benchmark]: Boogie Preprocessor took 53.83ms. Allocated memory is still 134.2MB. Free memory was 58.3MB in the beginning and 54.7MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,804 INFO L158 Benchmark]: RCFGBuilder took 1067.48ms. Allocated memory is still 134.2MB. Free memory was 54.1MB in the beginning and 59.7MB in the end (delta: -5.6MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,804 INFO L158 Benchmark]: TraceAbstraction took 58621.79ms. Allocated memory was 134.2MB in the beginning and 388.0MB in the end (delta: 253.8MB). Free memory was 58.9MB in the beginning and 233.5MB in the end (delta: -174.6MB). Peak memory consumption was 79.6MB. Max. memory is 16.1GB. [2021-11-21 01:45:00,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2431.93ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 79.2MB in the beginning and 63.8MB in the end (delta: 15.4MB). Peak memory consumption was 53.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 146.66ms. Allocated memory is still 134.2MB. Free memory was 63.8MB in the beginning and 58.3MB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.83ms. Allocated memory is still 134.2MB. Free memory was 58.3MB in the beginning and 54.7MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1067.48ms. Allocated memory is still 134.2MB. Free memory was 54.1MB in the beginning and 59.7MB in the end (delta: -5.6MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. * TraceAbstraction took 58621.79ms. Allocated memory was 134.2MB in the beginning and 388.0MB in the end (delta: 253.8MB). Free memory was 58.9MB in the beginning and 233.5MB in the end (delta: -174.6MB). Peak memory consumption was 79.6MB. 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. [2021-11-21 01:45:00,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P --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-53f42b1 [2021-11-21 01:45:03,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:45:03,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:45:03,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:45:03,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:45:03,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:45:03,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:45:03,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:45:03,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:45:03,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:45:03,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:45:03,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:45:03,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:45:03,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:45:03,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:45:03,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:45:03,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:45:03,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:45:03,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:45:03,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:45:03,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:45:03,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:45:03,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:45:03,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:45:03,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:45:03,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:45:03,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:45:03,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:45:03,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:45:03,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:45:03,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:45:03,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:45:03,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:45:03,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:45:03,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:45:03,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:45:03,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:45:03,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:45:03,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:45:03,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:45:03,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:45:03,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-21 01:45:03,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:45:03,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:45:03,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:45:03,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:45:03,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:45:03,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:45:03,584 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:45:03,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:45:03,585 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:45:03,585 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:45:03,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:45:03,586 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:45:03,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:45:03,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:45:03,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:45:03,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:45:03,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:45:03,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:45:03,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:45:03,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:45:03,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:45:03,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:45:03,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:45:03,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:45:03,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:45:03,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:45:03,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:45:03,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:45:03,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:45:03,594 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:45:03,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:03,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:45:03,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:45:03,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:45:03,596 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-21 01:45:04,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:45:04,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:45:04,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:45:04,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:45:04,037 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:45:04,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-21 01:45:04,111 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/c310ceb7f/f4bad6b1730741d5be52c80a13ca3636/FLAG822c1c96d [2021-11-21 01:45:04,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:45:04,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-21 01:45:05,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/c310ceb7f/f4bad6b1730741d5be52c80a13ca3636/FLAG822c1c96d [2021-11-21 01:45:05,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/data/c310ceb7f/f4bad6b1730741d5be52c80a13ca3636 [2021-11-21 01:45:05,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:45:05,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:45:05,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:45:05,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:45:05,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:45:05,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:05" (1/1) ... [2021-11-21 01:45:05,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1772c459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:05, skipping insertion in model container [2021-11-21 01:45:05,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:05" (1/1) ... [2021-11-21 01:45:05,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:45:05,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:45:05,988 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-21 01:45:05,997 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-21 01:45:06,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:06,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,000 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,001 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,002 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,026 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,028 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,033 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,034 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,037 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,039 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,040 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,041 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,412 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:45:07,413 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:45:07,414 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:45:07,415 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:45:07,417 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:45:07,418 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:45:07,418 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:45:07,419 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:45:07,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:45:07,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:45:07,545 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:45:07,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:45:07,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:45:07,621 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-21 01:45:07,622 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_2604f56c-bdd0-4461-9d5b-337203c4f6d7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-21 01:45:07,663 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,663 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,676 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,677 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,677 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:45:07,751 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:45:07,752 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:45:07,753 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:45:07,754 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:45:07,755 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:45:07,756 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:45:07,756 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:45:07,757 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:45:07,758 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:45:07,758 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:45:07,804 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:45:07,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:45:08,176 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:45:08,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08 WrapperNode [2021-11-21 01:45:08,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:45:08,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:45:08,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:45:08,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:45:08,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,358 INFO L137 Inliner]: procedures = 698, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 215 [2021-11-21 01:45:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:45:08,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:45:08,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:45:08,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:45:08,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:45:08,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:45:08,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:45:08,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:45:08,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (1/1) ... [2021-11-21 01:45:08,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:45:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:08,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:45:08,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:45:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-21 01:45:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-21 01:45:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:45:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:45:08,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:45:08,551 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:45:08,551 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-11-21 01:45:08,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-11-21 01:45:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:45:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 01:45:08,552 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 01:45:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:45:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:45:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:45:08,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:45:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-21 01:45:08,554 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-21 01:45:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:45:08,554 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:45:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:45:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:45:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:45:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:45:08,556 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:45:08,873 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:45:08,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:45:09,620 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:45:09,636 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:45:09,637 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:45:09,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:09 BoogieIcfgContainer [2021-11-21 01:45:09,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:45:09,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:45:09,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:45:09,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:45:09,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:45:05" (1/3) ... [2021-11-21 01:45:09,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b13587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:09, skipping insertion in model container [2021-11-21 01:45:09,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:08" (2/3) ... [2021-11-21 01:45:09,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b13587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:09, skipping insertion in model container [2021-11-21 01:45:09,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:09" (3/3) ... [2021-11-21 01:45:09,651 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-21 01:45:09,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:45:09,657 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:45:09,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:45:09,741 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 [2021-11-21 01:45:09,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:45:09,765 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) [2021-11-21 01:45:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 01:45:09,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:09,784 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] [2021-11-21 01:45:09,785 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2021-11-21 01:45:09,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650581884] [2021-11-21 01:45:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:09,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:09,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:09,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:45:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:10,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:45:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-21 01:45:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-21 01:45:10,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:10,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650581884] [2021-11-21 01:45:10,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650581884] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:10,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:10,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-21 01:45:10,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022674245] [2021-11-21 01:45:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:10,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:45:10,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:45:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:45:10,962 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) [2021-11-21 01:45:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:11,004 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2021-11-21 01:45:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:45:11,006 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 [2021-11-21 01:45:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:11,016 INFO L225 Difference]: With dead ends: 225 [2021-11-21 01:45:11,017 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 01:45:11,022 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 [2021-11-21 01:45:11,026 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 [2021-11-21 01:45:11,027 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] [2021-11-21 01:45:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 01:45:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-21 01:45:11,073 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) [2021-11-21 01:45:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2021-11-21 01:45:11,078 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2021-11-21 01:45:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:11,079 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2021-11-21 01:45:11,079 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) [2021-11-21 01:45:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2021-11-21 01:45:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 01:45:11,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:11,085 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] [2021-11-21 01:45:11,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:11,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:11,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2021-11-21 01:45:11,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530344916] [2021-11-21 01:45:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:11,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:11,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:11,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:45:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:45:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 01:45:12,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:45:12,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530344916] [2021-11-21 01:45:12,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530344916] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:12,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:12,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-21 01:45:12,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842807649] [2021-11-21 01:45:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:12,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:12,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:12,358 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) [2021-11-21 01:45:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:13,716 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-11-21 01:45:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:13,717 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 [2021-11-21 01:45:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:13,721 INFO L225 Difference]: With dead ends: 211 [2021-11-21 01:45:13,721 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 01:45:13,724 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 [2021-11-21 01:45:13,725 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 76 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:13,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 469 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:45:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 01:45:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-21 01:45:13,766 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) [2021-11-21 01:45:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 175 transitions. [2021-11-21 01:45:13,770 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 175 transitions. Word has length 101 [2021-11-21 01:45:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:13,771 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 175 transitions. [2021-11-21 01:45:13,771 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) [2021-11-21 01:45:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 175 transitions. [2021-11-21 01:45:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 01:45:13,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:13,777 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] [2021-11-21 01:45:13,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:13,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 993722959, now seen corresponding path program 1 times [2021-11-21 01:45:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043574178] [2021-11-21 01:45:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:14,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:14,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:45:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:45:14,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-21 01:45:14,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043574178] [2021-11-21 01:45:14,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043574178] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:14,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:14,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-21 01:45:14,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129561023] [2021-11-21 01:45:14,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:14,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:14,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:14,886 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) [2021-11-21 01:45:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:15,056 INFO L93 Difference]: Finished difference Result 231 states and 340 transitions. [2021-11-21 01:45:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:15,057 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 [2021-11-21 01:45:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:15,068 INFO L225 Difference]: With dead ends: 231 [2021-11-21 01:45:15,068 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 01:45:15,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:15,078 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 [2021-11-21 01:45:15,079 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] [2021-11-21 01:45:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 01:45:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-21 01:45:15,099 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) [2021-11-21 01:45:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-21 01:45:15,102 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 101 [2021-11-21 01:45:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:15,102 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-21 01:45:15,103 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) [2021-11-21 01:45:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-21 01:45:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:45:15,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:15,145 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] [2021-11-21 01:45:15,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:15,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1588307531, now seen corresponding path program 1 times [2021-11-21 01:45:15,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989051536] [2021-11-21 01:45:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:15,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:15,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:45:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:45:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 01:45:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:45:16,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989051536] [2021-11-21 01:45:16,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989051536] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:16,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-21 01:45:16,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272547464] [2021-11-21 01:45:16,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:16,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:16,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:45:16,414 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) [2021-11-21 01:45:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:17,964 INFO L93 Difference]: Finished difference Result 239 states and 361 transitions. [2021-11-21 01:45:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:17,965 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 [2021-11-21 01:45:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:17,967 INFO L225 Difference]: With dead ends: 239 [2021-11-21 01:45:17,967 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 01:45:17,968 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 [2021-11-21 01:45:17,970 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 70 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:17,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 641 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:45:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 01:45:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2021-11-21 01:45:17,988 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) [2021-11-21 01:45:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-21 01:45:17,990 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 103 [2021-11-21 01:45:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,991 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-21 01:45:17,991 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) [2021-11-21 01:45:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-21 01:45:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-21 01:45:17,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,994 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] [2021-11-21 01:45:18,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:18,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:18,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1973008072, now seen corresponding path program 1 times [2021-11-21 01:45:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27278089] [2021-11-21 01:45:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:18,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:18,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:18,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:45:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:45:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 01:45:18,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:45:19,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27278089] [2021-11-21 01:45:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27278089] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:19,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:19,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-21 01:45:19,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020933110] [2021-11-21 01:45:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:19,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:45:19,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:45:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:45:19,358 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) [2021-11-21 01:45:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:21,341 INFO L93 Difference]: Finished difference Result 260 states and 402 transitions. [2021-11-21 01:45:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:45:21,343 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 [2021-11-21 01:45:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:21,345 INFO L225 Difference]: With dead ends: 260 [2021-11-21 01:45:21,345 INFO L226 Difference]: Without dead ends: 154 [2021-11-21 01:45:21,346 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 [2021-11-21 01:45:21,347 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 98 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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 [2021-11-21 01:45:21,348 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] [2021-11-21 01:45:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-21 01:45:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 126. [2021-11-21 01:45:21,378 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) [2021-11-21 01:45:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2021-11-21 01:45:21,382 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 105 [2021-11-21 01:45:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:21,384 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2021-11-21 01:45:21,385 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) [2021-11-21 01:45:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2021-11-21 01:45:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 01:45:21,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:21,387 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] [2021-11-21 01:45:21,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:21,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:21,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash -172700770, now seen corresponding path program 1 times [2021-11-21 01:45:21,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:21,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850416159] [2021-11-21 01:45:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:21,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:21,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:21,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:45:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:45:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:45:22,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-21 01:45:22,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850416159] [2021-11-21 01:45:22,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850416159] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:22,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:22,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3] total 8 [2021-11-21 01:45:22,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127386377] [2021-11-21 01:45:22,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:22,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:22,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:22,585 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) [2021-11-21 01:45:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:23,912 INFO L93 Difference]: Finished difference Result 249 states and 393 transitions. [2021-11-21 01:45:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:23,913 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 [2021-11-21 01:45:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:23,916 INFO L225 Difference]: With dead ends: 249 [2021-11-21 01:45:23,916 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 01:45:23,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:45:23,918 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 [2021-11-21 01:45:23,919 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] [2021-11-21 01:45:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 01:45:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-11-21 01:45:23,934 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) [2021-11-21 01:45:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 188 transitions. [2021-11-21 01:45:23,937 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 188 transitions. Word has length 106 [2021-11-21 01:45:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:23,937 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 188 transitions. [2021-11-21 01:45:23,937 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) [2021-11-21 01:45:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 188 transitions. [2021-11-21 01:45:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-21 01:45:23,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:23,939 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] [2021-11-21 01:45:23,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:24,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1129641728, now seen corresponding path program 1 times [2021-11-21 01:45:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544372762] [2021-11-21 01:45:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:24,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:24,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:24,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:45:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:45:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:45:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-21 01:45:25,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:25,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544372762] [2021-11-21 01:45:25,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544372762] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:25,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:25,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-21 01:45:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154376962] [2021-11-21 01:45:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:25,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:25,150 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) [2021-11-21 01:45:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:25,301 INFO L93 Difference]: Finished difference Result 247 states and 373 transitions. [2021-11-21 01:45:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:45:25,302 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 [2021-11-21 01:45:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:25,304 INFO L225 Difference]: With dead ends: 247 [2021-11-21 01:45:25,305 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 01:45:25,306 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 [2021-11-21 01:45:25,307 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 [2021-11-21 01:45:25,307 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] [2021-11-21 01:45:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 01:45:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-11-21 01:45:25,320 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) [2021-11-21 01:45:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2021-11-21 01:45:25,322 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 114 [2021-11-21 01:45:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:25,323 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2021-11-21 01:45:25,323 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) [2021-11-21 01:45:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2021-11-21 01:45:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:45:25,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:25,326 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] [2021-11-21 01:45:25,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:25,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:25,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -369213267, now seen corresponding path program 1 times [2021-11-21 01:45:25,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:25,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469296882] [2021-11-21 01:45:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:25,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:25,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:25,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:45:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:45:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:45:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:27,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469296882] [2021-11-21 01:45:27,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469296882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:27,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636065902] [2021-11-21 01:45:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:27,870 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:27,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:27,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:27,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:45:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:28,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:45:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 01:45:28,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-21 01:45:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636065902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:28,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 8, 4] total 18 [2021-11-21 01:45:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228097171] [2021-11-21 01:45:28,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:28,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:28,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:45:28,633 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) [2021-11-21 01:45:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:28,684 INFO L93 Difference]: Finished difference Result 243 states and 362 transitions. [2021-11-21 01:45:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:28,686 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 [2021-11-21 01:45:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:28,688 INFO L225 Difference]: With dead ends: 243 [2021-11-21 01:45:28,688 INFO L226 Difference]: Without dead ends: 135 [2021-11-21 01:45:28,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 444 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:45:28,691 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 [2021-11-21 01:45:28,691 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] [2021-11-21 01:45:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-21 01:45:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-11-21 01:45:28,701 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) [2021-11-21 01:45:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 188 transitions. [2021-11-21 01:45:28,704 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 188 transitions. Word has length 116 [2021-11-21 01:45:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:28,704 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 188 transitions. [2021-11-21 01:45:28,704 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) [2021-11-21 01:45:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 188 transitions. [2021-11-21 01:45:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:45:28,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:28,707 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] [2021-11-21 01:45:28,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-21 01:45:28,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:29,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:29,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash -121066773, now seen corresponding path program 1 times [2021-11-21 01:45:29,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:29,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559973793] [2021-11-21 01:45:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:29,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:29,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:29,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:29,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:45:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:45:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:45:30,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:31,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559973793] [2021-11-21 01:45:31,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559973793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:31,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127683888] [2021-11-21 01:45:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:31,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:31,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:31,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-21 01:45:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:31,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:45:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:45:31,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-21 01:45:32,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127683888] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:32,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:32,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 5] total 19 [2021-11-21 01:45:32,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801223482] [2021-11-21 01:45:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:32,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:32,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:45:32,009 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) [2021-11-21 01:45:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:32,145 INFO L93 Difference]: Finished difference Result 249 states and 385 transitions. [2021-11-21 01:45:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:45:32,147 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 [2021-11-21 01:45:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:32,152 INFO L225 Difference]: With dead ends: 249 [2021-11-21 01:45:32,152 INFO L226 Difference]: Without dead ends: 138 [2021-11-21 01:45:32,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:45:32,157 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 [2021-11-21 01:45:32,158 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] [2021-11-21 01:45:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-21 01:45:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-21 01:45:32,170 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) [2021-11-21 01:45:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2021-11-21 01:45:32,172 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 116 [2021-11-21 01:45:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:32,174 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2021-11-21 01:45:32,174 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) [2021-11-21 01:45:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2021-11-21 01:45:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:45:32,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:32,177 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] [2021-11-21 01:45:32,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:32,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:32,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1492874071, now seen corresponding path program 1 times [2021-11-21 01:45:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:32,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196945562] [2021-11-21 01:45:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:32,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:32,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:32,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:45:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:45:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:45:34,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:34,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:34,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196945562] [2021-11-21 01:45:34,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196945562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111800457] [2021-11-21 01:45:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:34,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:34,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:34,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:45:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:34,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:45:35,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-21 01:45:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111800457] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:35,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8, 6] total 20 [2021-11-21 01:45:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272959862] [2021-11-21 01:45:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:35,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:35,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:45:35,315 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) [2021-11-21 01:45:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:35,537 INFO L93 Difference]: Finished difference Result 245 states and 373 transitions. [2021-11-21 01:45:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:45:35,538 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 [2021-11-21 01:45:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:35,540 INFO L225 Difference]: With dead ends: 245 [2021-11-21 01:45:35,540 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:45:35,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:45:35,542 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 [2021-11-21 01:45:35,543 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] [2021-11-21 01:45:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:45:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-11-21 01:45:35,556 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) [2021-11-21 01:45:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2021-11-21 01:45:35,558 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 116 [2021-11-21 01:45:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:35,559 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2021-11-21 01:45:35,559 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) [2021-11-21 01:45:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2021-11-21 01:45:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:45:35,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:35,561 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] [2021-11-21 01:45:35,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-21 01:45:35,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:35,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1772733927, now seen corresponding path program 1 times [2021-11-21 01:45:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688607074] [2021-11-21 01:45:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:35,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:35,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:35,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:45:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:36,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:45:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:45:37,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:38,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688607074] [2021-11-21 01:45:38,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688607074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [647522463] [2021-11-21 01:45:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:38,006 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:38,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:45:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:45:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:45:38,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 01:45:38,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [647522463] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:38,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:38,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-21 01:45:38,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372287359] [2021-11-21 01:45:38,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:38,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:45:38,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:45:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:45:38,890 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) [2021-11-21 01:45:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:39,134 INFO L93 Difference]: Finished difference Result 248 states and 359 transitions. [2021-11-21 01:45:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:45:39,144 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 [2021-11-21 01:45:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:39,145 INFO L225 Difference]: With dead ends: 248 [2021-11-21 01:45:39,145 INFO L226 Difference]: Without dead ends: 139 [2021-11-21 01:45:39,147 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 [2021-11-21 01:45:39,148 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 [2021-11-21 01:45:39,148 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] [2021-11-21 01:45:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-21 01:45:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-21 01:45:39,159 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) [2021-11-21 01:45:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-11-21 01:45:39,161 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 116 [2021-11-21 01:45:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:39,162 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-11-21 01:45:39,162 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) [2021-11-21 01:45:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-11-21 01:45:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 01:45:39,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:39,164 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] [2021-11-21 01:45:39,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:39,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:39,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:39,579 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 147277827, now seen corresponding path program 1 times [2021-11-21 01:45:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121987642] [2021-11-21 01:45:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:39,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:39,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:39,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:45:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:45:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:45:40,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:40,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:40,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121987642] [2021-11-21 01:45:40,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121987642] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:40,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:40,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-21 01:45:40,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175193174] [2021-11-21 01:45:40,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:40,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:40,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:45:40,363 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) [2021-11-21 01:45:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:41,268 INFO L93 Difference]: Finished difference Result 238 states and 331 transitions. [2021-11-21 01:45:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:41,269 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 [2021-11-21 01:45:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:41,270 INFO L225 Difference]: With dead ends: 238 [2021-11-21 01:45:41,271 INFO L226 Difference]: Without dead ends: 131 [2021-11-21 01:45:41,272 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 [2021-11-21 01:45:41,272 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 47 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:41,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 470 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-21 01:45:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-21 01:45:41,281 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) [2021-11-21 01:45:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-11-21 01:45:41,283 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 117 [2021-11-21 01:45:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:41,283 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-11-21 01:45:41,284 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) [2021-11-21 01:45:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-11-21 01:45:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 01:45:41,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:41,286 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] [2021-11-21 01:45:41,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:41,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:41,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2021-11-21 01:45:41,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:41,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351661859] [2021-11-21 01:45:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:41,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:41,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:41,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:45:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:45:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 01:45:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 01:45:42,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351661859] [2021-11-21 01:45:42,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351661859] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:42,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:42,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-21 01:45:42,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007691495] [2021-11-21 01:45:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:42,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:42,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:42,286 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) [2021-11-21 01:45:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:42,407 INFO L93 Difference]: Finished difference Result 242 states and 337 transitions. [2021-11-21 01:45:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:42,408 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 [2021-11-21 01:45:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:42,410 INFO L225 Difference]: With dead ends: 242 [2021-11-21 01:45:42,410 INFO L226 Difference]: Without dead ends: 133 [2021-11-21 01:45:42,411 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 [2021-11-21 01:45:42,412 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 [2021-11-21 01:45:42,412 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] [2021-11-21 01:45:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-21 01:45:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-21 01:45:42,421 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) [2021-11-21 01:45:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2021-11-21 01:45:42,423 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 117 [2021-11-21 01:45:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:42,423 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2021-11-21 01:45:42,424 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) [2021-11-21 01:45:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2021-11-21 01:45:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-21 01:45:42,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:42,425 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] [2021-11-21 01:45:42,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:42,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:42,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1150330055, now seen corresponding path program 1 times [2021-11-21 01:45:42,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969039126] [2021-11-21 01:45:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:42,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:42,652 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:42,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:45:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:45:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:45:43,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:43,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969039126] [2021-11-21 01:45:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969039126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:43,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:43,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-21 01:45:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075415680] [2021-11-21 01:45:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:43,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:43,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:45:43,704 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) [2021-11-21 01:45:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:44,639 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2021-11-21 01:45:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:45:44,640 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 [2021-11-21 01:45:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:44,641 INFO L225 Difference]: With dead ends: 247 [2021-11-21 01:45:44,641 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:45:44,642 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 [2021-11-21 01:45:44,643 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 69 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:44,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 649 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:45:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:45:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-11-21 01:45:44,652 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) [2021-11-21 01:45:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2021-11-21 01:45:44,653 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 119 [2021-11-21 01:45:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:44,654 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2021-11-21 01:45:44,654 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) [2021-11-21 01:45:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2021-11-21 01:45:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:45:44,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:44,656 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] [2021-11-21 01:45:44,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:44,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:44,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 787509940, now seen corresponding path program 1 times [2021-11-21 01:45:44,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:44,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322178949] [2021-11-21 01:45:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:44,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:44,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:44,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:45:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:45:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:45:45,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:45:45,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:45,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322178949] [2021-11-21 01:45:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322178949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:45,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:45,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-21 01:45:45,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381169533] [2021-11-21 01:45:45,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:45,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:45:45,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:45:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:45:45,925 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) [2021-11-21 01:45:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:47,599 INFO L93 Difference]: Finished difference Result 253 states and 358 transitions. [2021-11-21 01:45:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:45:47,600 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 [2021-11-21 01:45:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:47,602 INFO L225 Difference]: With dead ends: 253 [2021-11-21 01:45:47,602 INFO L226 Difference]: Without dead ends: 141 [2021-11-21 01:45:47,604 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 [2021-11-21 01:45:47,604 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 92 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:47,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 763 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:45:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-21 01:45:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2021-11-21 01:45:47,615 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) [2021-11-21 01:45:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 181 transitions. [2021-11-21 01:45:47,617 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 181 transitions. Word has length 121 [2021-11-21 01:45:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:47,618 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 181 transitions. [2021-11-21 01:45:47,618 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) [2021-11-21 01:45:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 181 transitions. [2021-11-21 01:45:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 01:45:47,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:47,620 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] [2021-11-21 01:45:47,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:47,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:47,833 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1331296970, now seen corresponding path program 1 times [2021-11-21 01:45:47,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899915574] [2021-11-21 01:45:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:47,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:47,836 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:47,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:45:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:45:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:45:48,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-21 01:45:48,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899915574] [2021-11-21 01:45:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899915574] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:48,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:48,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-21 01:45:48,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556414675] [2021-11-21 01:45:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:48,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:45:48,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:45:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:48,749 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) [2021-11-21 01:45:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:48,847 INFO L93 Difference]: Finished difference Result 248 states and 346 transitions. [2021-11-21 01:45:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:45:48,848 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 [2021-11-21 01:45:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:48,849 INFO L225 Difference]: With dead ends: 248 [2021-11-21 01:45:48,850 INFO L226 Difference]: Without dead ends: 139 [2021-11-21 01:45:48,850 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 [2021-11-21 01:45:48,851 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 [2021-11-21 01:45:48,851 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] [2021-11-21 01:45:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-21 01:45:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-11-21 01:45:48,861 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) [2021-11-21 01:45:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-11-21 01:45:48,862 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 130 [2021-11-21 01:45:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:48,863 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-11-21 01:45:48,863 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) [2021-11-21 01:45:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-11-21 01:45:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 01:45:48,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:48,865 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] [2021-11-21 01:45:48,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:49,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:49,079 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1396943881, now seen corresponding path program 2 times [2021-11-21 01:45:49,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:49,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060614231] [2021-11-21 01:45:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:45:49,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:49,082 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:49,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:45:50,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:45:50,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:45:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:45:51,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-21 01:45:51,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060614231] [2021-11-21 01:45:51,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060614231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366158950] [2021-11-21 01:45:51,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:45:51,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:51,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:51,770 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:51,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-21 01:45:52,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:45:52,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:45:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:45:53,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-21 01:45:53,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366158950] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:53,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:53,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-21 01:45:53,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132664092] [2021-11-21 01:45:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:53,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:45:53,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:45:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:45:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:45:53,494 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) [2021-11-21 01:45:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:53,725 INFO L93 Difference]: Finished difference Result 249 states and 346 transitions. [2021-11-21 01:45:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:45:53,728 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 [2021-11-21 01:45:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:53,730 INFO L225 Difference]: With dead ends: 249 [2021-11-21 01:45:53,730 INFO L226 Difference]: Without dead ends: 139 [2021-11-21 01:45:53,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:45:53,732 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 [2021-11-21 01:45:53,733 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] [2021-11-21 01:45:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-21 01:45:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-21 01:45:53,742 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) [2021-11-21 01:45:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2021-11-21 01:45:53,744 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 132 [2021-11-21 01:45:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:53,745 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2021-11-21 01:45:53,745 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) [2021-11-21 01:45:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2021-11-21 01:45:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:45:53,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:53,747 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] [2021-11-21 01:45:53,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:53,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-21 01:45:54,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:45:54,152 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash -659240699, now seen corresponding path program 2 times [2021-11-21 01:45:54,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:45:54,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759175397] [2021-11-21 01:45:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:45:54,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:45:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:45:54,154 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:45:54,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:45:54,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:45:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 01:45:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:57,509 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 [2021-11-21 01:45:57,522 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 [2021-11-21 01:45:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:45:57,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:01,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:01,067 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 [2021-11-21 01:46:01,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:01,155 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 [2021-11-21 01:46:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-21 01:46:01,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:46:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759175397] [2021-11-21 01:46:01,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759175397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113460346] [2021-11-21 01:46:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:46:01,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:46:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:46:01,743 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:46:01,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-21 01:46:02,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:46:02,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:46:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:04,586 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 [2021-11-21 01:46:04,599 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 [2021-11-21 01:46:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:46:04,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:05,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:05,532 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 [2021-11-21 01:46:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 01:46:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113460346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653076226] [2021-11-21 01:46:06,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:46:06,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:06,607 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:06,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 01:46:08,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:46:08,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:46:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:09,840 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 [2021-11-21 01:46:09,851 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 [2021-11-21 01:46:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:46:09,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:10,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:10,510 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 [2021-11-21 01:46:10,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:10,536 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 [2021-11-21 01:46:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 01:46:10,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653076226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:10,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:46:10,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12, 9, 12, 9] total 34 [2021-11-21 01:46:10,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089367665] [2021-11-21 01:46:10,945 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-21 01:46:10,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:46:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-21 01:46:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:46:10,947 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) [2021-11-21 01:46:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:26,087 INFO L93 Difference]: Finished difference Result 452 states and 748 transitions. [2021-11-21 01:46:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:46:26,088 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 [2021-11-21 01:46:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:26,091 INFO L225 Difference]: With dead ends: 452 [2021-11-21 01:46:26,091 INFO L226 Difference]: Without dead ends: 337 [2021-11-21 01:46:26,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 753 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=347, Invalid=2103, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:46:26,094 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 351 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s 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, 13.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:26,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 3207 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1944 Invalid, 0 Unknown, 795 Unchecked, 13.0s Time] [2021-11-21 01:46:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-21 01:46:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 177. [2021-11-21 01:46:26,124 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) [2021-11-21 01:46:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2021-11-21 01:46:26,126 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 133 [2021-11-21 01:46:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:26,126 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2021-11-21 01:46:26,127 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) [2021-11-21 01:46:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2021-11-21 01:46:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:46:26,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:26,129 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] [2021-11-21 01:46:26,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:26,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-21 01:46:26,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-21 01:46:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:46:26,735 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:46:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1992797946, now seen corresponding path program 3 times [2021-11-21 01:46:26,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:46:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873304788] [2021-11-21 01:46:26,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:46:26,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:46:26,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:46:26,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:46:26,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-21 01:46:29,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:46:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:29,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:46:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-21 01:46:31,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:32,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:32,695 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 [2021-11-21 01:46:32,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:46:32,720 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 [2021-11-21 01:46:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-21 01:46:33,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:46:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873304788] [2021-11-21 01:46:33,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873304788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [791777424] [2021-11-21 01:46:33,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:46:33,154 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:46:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:46:33,154 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:46:33,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2604f56c-bdd0-4461-9d5b-337203c4f6d7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-21 01:46:35,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:46:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:46:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:35,040 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 [2021-11-21 01:46:35,381 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-11-21 01:46:35,381 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 [2021-11-21 01:46:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:35,403 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 [2021-11-21 01:46:38,583 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 [2021-11-21 01:46:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:53,753 WARN L227 SmtUtils]: Spent 15.10s 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) [2021-11-21 01:46:53,754 INFO L354 Elim1Store]: treesize reduction 483, result has 12.7 percent of original size [2021-11-21 01:46:53,755 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 [2021-11-21 01:46:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,140 WARN L227 SmtUtils]: Spent 14.38s 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) [2021-11-21 01:47:08,141 INFO L354 Elim1Store]: treesize reduction 483, result has 14.2 percent of original size [2021-11-21 01:47:08,141 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